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Reference Manual
00809-0100-4021, Rev BA
April 2003

Model 3144P Smart
Temperature Transmitter

www.rosemount.com

Reference Manual
00809-0100-4021, Rev BA
April 2003

Model 3144P

Model 3144P Smart Temperature
Transmitter
Model 3144P Revision: 5.3.4
HART Field Device Revision: Dev. v3, DD v2
NOTICE
Read this manual before working with the product. For personal and system safety, and for
optimum product performance, make sure you thoroughly understand the contents before
installing, using, or maintaining this product.
Within the United States, Rosemount Inc. has two toll-free assistance numbers:
Customer Central
Technical support, quoting, and order-related questions.
1-800-999-9307 (7:00 am to 7:00 pm CST)
North American Response Center
Equipment service needs.
1-800-654-7768 (24 hours)
International
(952)-906-8888

The products described in this document are NOT designed for nuclear-qualified
applications. Using non-nuclear qualified products in applications that require
nuclear-qualified hardware or products may cause inaccurate readings.
For information on Rosemount nuclear-qualified products, contact your local Emerson
Process Management Sales Representative.
Rosemount Model 3144P Smart Temperature Transmitter may be protected by one or more U.S.
Patents Pending. Other foreign patents pending.

www.rosemount.com

Reference Manual
00809-0100-4021, Rev BA
April 2003

Model 3144P

Table of Contents
SECTION 1
Introduction

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Environmental. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Software Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Model 3144P and Models 3144 / 3244MV Differences . . . . . . . . . . . . 1-4

SECTION 2
Installation

Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Setting the Loop to Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Set the Switches. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Typical North American Installation . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Typical European Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
In Conjunction with a Model 333 HART Tri-Loop . . . . . . . . . . . . . . 2-7
LCD Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Multichannel Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
Field Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
Sensor Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
Power/Current Loop Connections . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Power Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
Surges/Transients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
Grounding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13

SECTION 3
Commissioning

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Model 275 HART Communicator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Updating the Model 275 HART Communication Software . . . . . . . 3-2
Menu Tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Fast Key Sequences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
AMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Apply AMS Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Review Configuration Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Check Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

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Reference Manual

Model 3144P

00809-0100-4021, Rev BA
April 2003

Device Output Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14
Device Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18
Measurement Filtering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19
Diagnostics and Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21
Multidrop Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23
Use with the HART Tri-Loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-24

SECTION 4
Operation and
Maintenance

Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Trim the Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
Diagnostics with HART Communicator . . . . . . . . . . . . . . . . . . . . . 4-9
Diagnostics with AMS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
Assembling the Electronics Housing . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
Replacing the Electronics Module . . . . . . . . . . . . . . . . . . . . . . . . 4-13
LCD Meter Diagnostic Messages . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
AMS Screens Diagnostic Messages . . . . . . . . . . . . . . . . . . . . . . 4-16
Model 275 HART Communicator. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17
Diagnostic Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17
AMS Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20
Diagnostic Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20
AMS Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20

APPENDIX A
Specifications and
Reference Data

Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Functional . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Physical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3
Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4
Dimensional Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-7
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-9
Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-9
Spare Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-10
Tagging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-10
Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-10
Software Tag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-10
External Ground Screw Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . A-11
Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-11
Standard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-11
Custom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-11

APPENDIX B
Product Certifications

Hazardous Locations Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
North American Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
European Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2
Australian Approvals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3
Japanese Approval. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-4
Brazilian Approval. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-4
Combination Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-4
Additional Approvals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-4
Installation Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-5

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Reference Manual
00809-0100-4021, Rev BA
April 2003

APPENDIX C
Safety Instrumented
System (SIS)

Model 3144P
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-1
Failure Rate Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-2
Model 3144P with and without a RTD . . . . . . . . . . . . . . . . . . . . . .C-2
Model 3144P with and without a Thermocouple. . . . . . . . . . . . . . .C-2
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-3
Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-3
Changing Switch Position. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-3

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Reference Manual

Model 3144P

TOC-4

00809-0100-4021, Rev BA
April 2003

Reference Manual
00809-0100-4021, Rev BA
April 2003

Section 1

Model 3144P

Introduction
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-1
Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-1
Model 3144P and Models 3144 / 3244MV Differences . . . page 1-4

OVERVIEW
Manual

This manual is intended to assist in the installation, operation, and
maintenance of the Rosemount Model 3144P Smart Temperature Transmitter.
Section 1: Introduction
Section 2: Installation
Section 3: Commissioning
Section 4: Operation and Maintenance
Appendix A: Specifications and Reference Data
Appendix B: Hazardous Area Approvals
Appendix C: Safety Instrumented System (SIS)

Transmitter

The Rosemount Model 3144P Smart Temperature Transmitter is a
microprocessor-based instrument that accepts input from a wide variety of
sensors and transmits temperature data to a control system or transmitter
interface. The transmitter combines Emerson Process Management reliability
with the flexibility of digital electronics. The transmitter is ideal for applications
that require high performance and/or remote communication.
The AMS software and Model 275 HART® Communicator use HART protocol
to interrogate, configure, test, and format the Model 3144P transmitter.
Communication can be made with the transmitter from the control room,
transmitter site, or across any other two points in the loop provided the loop
contains 250 to 1100 ohms of resistance.
Special dual-sensor features include Hot Backup®, sensor drift alert, first good,
differential and average temperature measurements, and four simultaneous
measurement variable outputs in addition to the analog output signal

CONSIDERATIONS
General

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Electrical temperature sensors, such as resistance temperature detectors
(RTDs) and thermocouples (T/Cs), produce low-level signals proportional to
temperature. The Model 3144P transmitter converts low-level sensor signals
to a standard 4–20 mA dc signal. This current signal is then transmitted to the
control room via two power/signal wires.

Reference Manual
00809-0100-4021, Rev BA
April 2003

Model 3144P
Electrical

Proper electrical installation is essential to prevent errors due to sensor lead
resistance and electrical noise. Shielded cable should be used for best results
in electrically noisy environments. The current loop must have between 250
and 1100 ohms resistance for HART communications. Refer to Figure 2-10 on
page 2-11 for sensor and current loop connections.

Environmental

Temperature Effects
The transmitter will operate within specifications for ambient temperatures
between –40 and 185 °F (–40 and 85 °C). Heat from the process is
transferred from the thermowell to the transmitter housing. If the expected
process temperature is near or beyond specification limits, consider the use of
additional thermowell lagging, an extension nipple, or a remote mounting
configuration to isolate the transmitter from the process. Figure 1-1 describes
the relationship between housing temperature rise and extension length.
60 (108)
50 (90)
40 (72)

815 °C (1500 °F) Oven Temperature

30 (54)
22

20 (36)

540 °C (1000 °F)
Oven Temperature

10 (18)

3044-0123A

Housing Temperature Rise, Above
Ambient °C (°F)

Figure 1-1. Model 3144P
Transmitter Housing
Temperature Rise versus
Extension Length for a Test
Installation.

250 °C (482 °F) Oven Temperature
0
3

4
3.6

5
6
7
8
Extension Length (in.)

9

Example:
The maximum permissible housing temperature rise (T) can be calculated
by subtracting the maximum ambient temperature (A) from the
transmitter’s ambient temperature specification limit (S). For instance,
suppose A = 40 °C.
T=S-A
T = 85 °C – 40 °C
T = 45 °C
For a process temperature of 540 °C (1004 °F), an extension length of 3.6
inches (91.4 mm) yields a housing temperature rise (R) of 22 °C (72 °F),
which provides a safety margin of 23 °C (73 °F). A six-inch extension
length (R = 10 °C (50 °F)) would offer a higher safety margin (35 °C (95
°F)) and would reduce temperature-effect errors but would probably
require extra transmitter support. Gauge the requirements for individual
applications along this scale. If a thermowell with lagging is used, the
extension length may be reduced by the length of the lagging.

1-2

Reference Manual
00809-0100-4021, Rev BA
April 2003

Model 3144P
Moist or Corrosive Environments

The Model 3144P temperature transmitter has a highly reliable dual
compartment housing designed to resist moisture and corrosion. The sealed
electronics module is mounted in a compartment that is isolated from the
terminal side conduit entries. O-ring seals protect the interior when the covers
are properly installed. In humid environments, however, it is possible for
moisture to accumulate in conduit lines and drain into the housing.
NOTE
Each transmitter is clearly marked with a tag indicating the approvals. Install
the transmitter in accordance with all applicable installation codes and
approval and installation drawings (see Appendix B: Product Certifications).
Verify that the operating atmosphere of the transmitter is consistent with the
hazardous locations certifications.
Once a device labeled with multiple approval types is installed, it should not
be reinstalled using any of the other labeled approval types. To ensure this,
the approval label should be permanently marked to distinguish the used from
the unused approval type(s).

Mounting

Take into account the need for access to the transmitter when choosing an
installation location and position.
Terminal Side of Electronics Housing
Mount the transmitter so the terminal side is accessible. Allow adequate
clearance for cover removal. Make wiring connections through the conduit
openings on the bottom of the housing.
Circuit Side of Electronics Housing
Mount the transmitter so the circuit side is accessible. Provide adequate
clearance for cover removal. Additional room is required for LCD installation.
The transmitter may be mounted directly to or remotely from the sensor.
Using optional mounting brackets, the transmitter may be mounted to a flat
surface or to a two-inch diameter pipe (see “Optional Transmitter Mounting
Brackets” on page A-8).

Software Compatibility

Replacement transmitters may contain revised software that is not fully
compatible with the existing software in your HART communicator.
Model 275 HART Communicators and AMS software containing device
descriptors for the Models 3144 and 3244MV before December 2001 do not
fully support the new features of the Model 3144P. The HART Communicator
Field Device Revisions Dev v3,DD v2 should be loaded into the Model 275
HART Communicator to communicate with the new features of the Model
3144P. The Device Descriptors (DD) are available with new communicators or
can be loaded into existing communicators at any Emerson Process
Management Service Center. See Section 3: Commissioning for more device
revisions information.

1-3

Reference Manual
00809-0100-4021, Rev BA
April 2003

Model 3144P
MODEL 3144P AND
MODELS 3144 / 3244MV
DIFFERENCES

The following table identifies the differences between the Model 3144P and
Models 3144 and 3244MV Temperature Transmitters.
Improved Model 3144P

Previous Model 3144 and 3244MV

Field Device Revision number 3
Software Revision number 3
Added sensor input types: DIN Type L, DIN
Type U, and extended temperature range of
Type N
Uses custom-configurable alarm limits

Field Device Revision number 2
Software Revision number 1
NA

Analog output and alarm levels can be
ordered to be NAMUR-compliant with option
codes A1 and CN
NA
NA

Improved 2- and 3-wire EMF compensation
First Good Temperature is available as a
device variable
2-wire fixed lead correction is available
NA
Enhanced EMI rejection and filtering resulting
NA
in unmatched stability in process measurement
Dual-sensor configuration is field selectable
Model 3144 – single sensor
Model 3244MV – dual-sensor configuration

1-4

Reference Manual
00809-0100-4021, Rev BA
April 2003

Section 2

Model 3144P

Installation
Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-1
Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-2
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-4
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-5
Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-9
Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-12

SAFETY MESSAGES

Instructions and procedures in this section may require special precautions to
ensure the safety of the personnel performing the operations. Information that
potentially raises safety issues is indicated by a warning symbol ( ). Please
refer to the following safety messages before performing an operation
preceded by this symbol.

Warnings

Explosions could result in death or serious injury:
•

Do not remove the transmitter cover in explosive atmospheres when the circuit
is live.

•

Before connecting a HART communicator in an explosive atmosphere, make sure
the instruments in the loop are installed in accordance with intrinsically safe or
non-incendive field wiring practices.

•

Verify that the operating atmosphere of the transmitter is consistent with the
appropriate hazardous locations certifications.

•

Both transmitter covers must be fully engaged to meet explosion-proof
requirements.

Failure to follow these installation guidelines could result in death or serious injury:
•

Make sure only qualified personnel perform the installation.

Process leaks could result in death or serious injury:
•

Install and tighten thermowells or sensors before applying pressure, or process
leakage may result.

•

Do not remove the thermowell while in operation. Removing while in operation
may cause process fluid leaks.

Electrical shock could cause death or serious injury. If the sensor is installed in a
high-voltage environment and a fault or installation error occurs, high voltage may be
present on the transmitter leads and terminals:
•

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Use extreme caution when making contact with the leads and terminals.

Reference Manual
00809-0100-4021, Rev BA
April 2003

Model 3144P
COMMISSIONING

The Model 3144P must be configured for certain basic variables to operate.
In many cases, all of these variables are pre-configured at the factory.
Configuration may be required if the transmitter is not configured or if the
configuration variables need revision.
Commissioning consists of testing the transmitter and verifying transmitter
configuration data. Model 3144P Series transmitters can be commissioned
either before or after installation. Commissioning the transmitter on the bench
before installation using a Model 275 HART Communicator or AMS ensures
that all transmitter components are in working order.
To commission on the bench, connect the transmitter and the HART
Communicator or AMS as shown in Figure 2-10 on page 2-11. Make sure the
instruments in the loop are installed according to intrinsically-safe or
non-incendive field wiring practices before connecting a communication in an
explosive atmosphere. Connect HART Communication leads at any
termination point in the signal loop. For convenience, connect them to the
terminals labeled “COMM” on the terminal block. Connecting across the
“TEST” terminals will prevent successful communication. Avoid exposing the
transmitter electronics to the plant environment after installation by setting all
transmitter jumpers during the commissioning stage on the bench.
When using a HART Communicator, any configuration changes made must
be sent to the transmitter by using the “Send” key (F2). AMS configuration
changes are implemented when the “Apply” button is clicked.
For more information on using the model 275 HART Communicator with the
Model 3144P transmitter, see Section 3: Commissioning.

Figure 2-1. Installation
Flowchart.
START
HERE

Bench
Calibration?
Yes
BASIC SETUP
Set Units
Set Range
Values
Set Sensor
Types
Set Number
of Wires
Set Damping

No

VERIFY

FIELD INSTALL

Simulate
Sensor Input

Set Jumpers or
Switches

Within
Specifications?

No
Refer to
Section 1:
Maintenance

Yes

Mount the
Transmitter
Wire the
Transmitter
Power the
Transmitter
Check for
Process Leaks
Done

Setting the Loop to
Manual

2-2

When sending or requesting data that would disrupt the loop or change the
output of the transmitter, set the process application loop to manual. The
HART Communicator or AMS will prompt you to set the loop to manual when
necessary. Acknowledging this prompt does not set the loop to manual. The
prompt is only a reminder; set the loop to manual as a separate operation.

Reference Manual
00809-0100-4021, Rev BA
April 2003

Set the Switches

Model 3144P
Without a LCD meter
1. If the transmitter is installed, set the loop to manual.
2. Remove the housing cover on the electronics side of the transmitter. Do
not remove the transmitter cover in explosive atmospheres when the
circuit is live.
3. Set the switches to the desired position (see Figure 2-1).
4. Replace the transmitter cover. Both transmitter covers must be fully
engaged to meet explosion-proof requirements.
5. Set the loop to automatic control.
With a LCD meter
1. If the transmitter is installed, set the loop to manual.
2. Remove the housing cover on the electronics side of the transmitter. Do
not remove the transmitter cover in explosive atmospheres when the
circuit is live.
3. Remove the housing cover, unscrew the LCD meter screws and gently
slide the meter straight off.
4. Set the switches to the desired position (see Figure 2-1).
5. Gently slide the LCD meter back into place, taking extra precautions of
the 10 pin connection.
6. Secure the LCD meter by replacing the LCD meter screws.
7. Replace the transmitter cover. Both transmitter covers must be fully
engaged to meet explosion-proof requirements.
8. Set the loop to automatic control.

Table 2-1. Transmitter Switch
Locations.

Switch Location

LCD Meter Faceplate

Fail Mode and Security Switch

Failure Mode

3144- 0200G33A, 0001B01B

Diagram of
Switches
LCD
Connector

Security

Transmitter Security Switch
The transmitter is equipped with a write-protect switch that can be positioned
to prevent the accidental or deliberate change of configuration data.
Failure Mode Switch
The transmitter monitors itself during normal operation with an automatic
diagnostic routine. If the diagnostic routine detects a sensor failure or a failure
in the transmitter electronics, the transmitter goes into alarm (high or low,
depending on the position of the failure mode switch).

2-3

Reference Manual
00809-0100-4021, Rev BA
April 2003

Model 3144P

The analog alarm and saturation values that the transmitter uses depend on
whether it is configured to standard or NAMUR-compliant operation. These
values are also custom-configurable in both the factory and the field using the
HART Communications. The limits are

Table 2-2. Values for standard
and NAMUR operation

•

21.0 ≤I ≤23 for high alarm

•

3.5 ≤I ≤3.75 for low alarm

Standard Operation (factory default)
Fail High
High Saturation
Low Saturation
Fail Low

MOUNTING

21.75 mA ≤I ≤23.0 mA
I ≥ 20.5 mA
I ≤3.90 mA
I ≤3.75 mA

NAMUR-Compliant Operation
Fail High
High Saturation
Low Saturation
Fail Low

21 mA ≤I ≤23.0 mA
I ≥ 20.5 mA
I ≤3.8 mA
I ≤3.6 mA

If possible, mount the transmitter at a high point in the conduit run so moisture
from the conduits will not drain into the housing. The terminal compartment
could fill with water If the transmitter is mounted at a low point in the conduit
run. In some instances, the installation of a poured conduit seal, such as the
one pictured in Figure 2-3, is advisable. Remove the terminal compartment
cover periodically and inspect the transmitter for moisture and corrosion.

Figure 2-2. Incorrect Conduit
Installation
Conduit
Lines
3144-0429A, 0429B

Conduit
Lines

Figure 2-3. Recommended
Mounting with Drain Seal

Sealing
Compound

Thermowell

Sensor Hex

Conduit for
Field Wiring

Poured Conduit Seal (Where Required)

If mounting the transmitter directly to the sensor assembly, use the process
shown in Figure 2-4. If mounting the transmitter apart from the sensor
assembly, use conduit between the sensor and transmitter. The transmitter
accepts male conduit fittings with 1/2–14 NPT, M20 × 1.5 (CM 20), PG 13.5
(PG 11), or JIS G1/2 threads (M20 × 1.5 (CM 20), PG 13.5 (PG 11), or JIS G1/2
threads are provided by an adapter). Make sure only qualified personnel
perform the installation.
The transmitter may require supplementary support under high-vibration
conditions, particularly if used with extensive thermowell lagging or long
extension fittings. Pipe-stand mounting, using one of the optional mounting
brackets, is recommended for use in high-vibration conditions.
2-4

3144-0430B

Union Coupling with Extension

Reference Manual
00809-0100-4021, Rev BA
April 2003

Model 3144P

INSTALLATION
Typical North American
Installation

1. Attach the thermowell to the pipe or process container wall. Install and
tighten thermowells and sensors. Apply process pressure to perform a
leak test.
2. Attach necessary unions, couplings, and extension fittings. Seal the
fitting threads with teflon® (PTFE) tape (if required).
3. Screw the sensor into the thermowell or directly into the process
(depending on installation requirements).
4. Verify all sealing requirements for severe environments or to satisfy code
requirements.
5. Attach the transmitter to the thermowell/sensor assembly. Seal all
threads with Teflon (PTFE) tape (if required).
6. Pull sensor leads through the extensions, unions, or couplings into the
terminal side of the transmitter housing.
7. Install field wiring conduit to the remaining transmitter conduit entry.
8. Pull the field wiring leads into the terminal side of the transmitter housing.
9. Attach the sensor leads to the transmitter sensor terminals. Attach the
power leads to the transmitter power terminals.
10. Attach and tighten both transmitter covers. Both transmitter covers must
be fully engaged to meet explosion-proof requirements.

Figure 2-4. Typical North
American Mounting
Configuration.
Extension

Extension
Fitting
Length
NOTE: Dimensions are in inches (millimeters).

Conduit for Field
Wiring (dc power)

3.2
(81)

3144-0433B

Thermowell

Union or
Coupling

NOTE
The National Electrical Code requires that a barrier or seal be used in addition
to the primary (sensor) seal to prevent process fluid from entering the
electrical conduit and continuing to the control room. Professional safety
assistance is recommended for installation in potentially hazardous
processes.

2-5

Reference Manual
00809-0100-4021, Rev BA
April 2003

Model 3144P
Typical European
Installation

1. Mount the thermowell to the pipe or the process container wall. Install
and tighten thermowells and sensors. Apply pressure and perform a leak
check before starting the process.
2. Attach a connection head to the thermowell.
3. Insert the sensor into the thermowell and wire it to the connection head.
The wiring diagram is located on the inside of the connection head.
4. Mount the transmitter to a 2-inch (50 mm) pipe or a suitable panel using
one of the optional mounting brackets. The B4 bracket is shown in
Figure 2-5.
5. Attach cable glands to the shielded cable running from the connection
head to the transmitter conduit entry.
6. Run the shielded cable from the opposite conduit entry on the transmitter
back to the control room.
7. Insert the shielded cable leads through the cable entries into the
connection head and the transmitter. Connect and tighten the cable
glands.
8. Connect the shielded cable leads to the connection head terminals
(located inside of the connection head) and the sensor wiring terminals
(located inside of the transmitter housing). Avoid contact with the leads
and the terminals.

Cable
Gland

Shielded Cable from
Sensor to Transmitter
Shielded Cable
from Transmitter
to Control Room

2-6

2-inch
Pipe
B4
Mounting
Bracket

644-0000B05B

Figure 2-5. Typical European
Process Mounting
Configuration.

Reference Manual
00809-0100-4021, Rev BA
April 2003

Model 3144P

In Conjunction with a
Model 333 HART
Tri-Loop

Use the dual-sensor option Model 3144P transmitter that is operating with two
sensors in conjunction with a Model 333 HART Tri-Loop® HART-to-Analog
Signal Converter to acquire an independent 4–20 mA analog output signal for
each sensor input. The Model 3144P transmitter can be configured to output
four of the six following digital process variables:
•

Sensor 1

•

Sensor 2

•

Differential temperature

•

Average temperature

•

First good temperature,

•

Transmitter terminal temperature.

The HART Tri-Loop reads the digital signal and outputs any or all of these
variables into as many as three separate 4–20 mA analog channels.
Refer to Figure 2-6 for basic installation information. Refer to the Model 333
HART Tri-Loop HART-to-Analog Signal Converter Reference Manual
(document number 00809-0100-4754) for complete installation information.
Figure 2-6. HART Tri-Loop
Installation Flowchart(1)
START
HERE

Unpack the
Tri-Loop

Review the
Tri-Loop
Reference
Manual

No
Install the
Model 3144P

Model 3144P
Installed?

Yes
Set the Model
3144P Burst
Command
Order
Set the Model
3144P to Burst
HART
Command 3

INSTALL THE
TRI-LOOP

COMMISSION
THE TRI-LOOP

Review
Tri-Loop
Installation
Considerations

Configure the
Tri-Loop to
Receive Model
3144P Burst
Commands

Mount the
Tri-Loop to a
DIN Rail

Run Wires from
Model 3144P to
Burst Input
Terminals

Pass System
Test?

No

Refer to the
HART Tri-Loop
Reference
Manual

Yes
DONE

Install Channel
1 Wires from
Tri-Loop to
Control Room
OPTIONAL:
Install Channel
2 Wires from
Tri-Loop to
Control Room
OPTIONAL:
Install Channel
3 Wires from
Tri-Loop to
Control Room

(1)

See “Use with the HART Tri-Loop” on page 3-24 for configuration information.

2-7

Reference Manual
00809-0100-4021, Rev BA
April 2003

Model 3144P
LCD Meter

Transmitters ordered with the LCD meter option (Option Code M5) are
shipped with the LCD meter installed. After-market installation of the LCD
meter on a conventional Model 3144P transmitter requires a small instrument
screwdriver and the LCD meter kit, which includes:
•

LCD meter assembly

•

Extended cover with cover O-ring in place

•

Captive screws (quantity 2)

•

10-pin interconnection header

Use the following procedure to install the LCD meter. Once the LCD meter is
installed, configure the transmitter to recognize the meter option. Refer to
“LCD Meter Options” on page 3-19.
1. If the transmitter is installed in a loop, set the loop to manual and
disconnect the power.
2. Remove the housing cover from the electronics side of the transmitter.
Do not remove the transmitter covers in explosive atmospheres if the
circuit is live.
3. Ensure that the transmitter security mode switch is set to the Off
position. If transmitter security is On, then you will not be able to
configure the transmitter to recognize the LCD meter. If security On is
desired, first configure the transmitter for the LCD meter and then install
the meter.
4. Insert the interconnection header in the 10-pin socket on the face of the
electronics module. Insert the pins into the electronics LCD interface.
5. Orient the meter. The meter can be rotated in 90-degree increments for
easy viewing. Position one of the four 10-pin sockets on the back of the
meter to accept the interconnection header.
6. Attach the LCD meter assembly to the interconnection pins. Thread and
tighten the LCD meter screws into the holes on the electronics module.
7. Attach the extended cover; tighten at least one-third turn after the O-ring
contacts the transmitter housing. Both transmitter covers must be fully
engaged to meet explosion proof requirements.
8. Apply power.
NOTE
Observe the following LCD meter temperature limits:
Operating:–4 to 185 °F (–20 to 85 °C)
Storage:–50 to 185 °F (–45 to 85 °C)

2-8

Reference Manual
00809-0100-4021, Rev BA
April 2003

Multichannel
Installations

Model 3144P
You can connect several transmitters to a single master power supply (see
Figure 2-7). In this case, the system may be grounded only at the negative
power supply terminal. In multichannel installations where several
transmitters depend on one power supply and the loss of all transmitters
would cause operational problems, consider an uninterrupted power supply or
a back-up battery. The diodes shown in Figure 2-7 prevent unwanted
charging or discharging of the back-up battery.

Figure 2-7. Multichannel
Installations.

Battery
Backup

RLead
Transmitter
No. 1
RLead

dc
Power
Supply

Readout or
Controller No. 1

RLead
Between 250 and 1100 Ω
If No Load Resistor

Readout or
Controller No. 2

3044-0131A

Transmitter
No. 2

To Additional
Transmitters

WIRING
Field Wiring

All power to the transmitter is supplied over the signal wiring. Signal wiring
does not need to be shielded, but twisted pairs should be used for the best
results. Do not run unshielded signal wiring in conduit or open trays with
power wiring or near heavy electrical equipment. High voltage may be present
on the leads and may cause electrical shock. To wire the transmitter for
power, follow the steps below.
1. Remove the transmitter covers. Do not remove the transmitter covers in
an explosive atmosphere when the circuit is live.
2. Connect the positive power lead to the terminal marked “+” and the
negative power lead to the terminal marked “–” as shown in Figure 2-8.
Crimped lugs are recommended when wiring to screw terminals.
3. Tighten the terminal screws to ensure that good contact is made. No
additional power wiring is required.
4. Replace the transmitter covers. Both transmitter covers must be fully
engaged to meet explosion-proof requirements.
NOTE
Do not apply high voltage (e.g., ac line voltage) to the transmitter terminals.
Abnormally high voltage can damage the unit.

Negative Terminal

Sensor Terminals

Positive Terminal
Test Terminal
Transmitter Ground
Terminal

3144-0200E01D

Figure 2-8. Transmitter Terminal
Block

2-9

Reference Manual
00809-0100-4021, Rev BA
April 2003

Model 3144P
Figure 2-9. Sensor Wiring
Diagram.

2-wire RTD
and Ohms

3-wire RTD
and Ohms**

4-wire RTD
and Ohms

T/Cs and
Millivolts

RTD with
Compensation
Loop*

3144-0000E05A

Model 3144P Single Sensor Connections Diagram

Model 3144P Dual-Sensor Connections Diagram
***
**R

W

**

W&G
G

**

**

Average.
Temp./DT/Hot
Backup/
Dual-sensor
with 2 RTDs

Average.
Average.
Average.
Average.
Temp./DT/Hot
Temp./DT/Hot
Temp./DT/
Temp./DT/
Backup/
Backup/Dual
Hot Backup/Dual Hot Backup/Dual
Dual-sensor
Sensor with
Sensor with
Sensor with 2
with 2
RTDs/
RTDs/
RTDs with
Thermocouples Thermocouples Thermocouples
Compensation
Loop

* Transmitter must be configured for a 3-wire RTD in order to recognize an RTD with a
compensation loop.
** Emerson Process Management provides 4-wire sensors for all single-element RTDs. You can use
these RTDs in 3-wire configurations by leaving the unneeded leads disconnected and insulated with
electrical tape.
*** Typical wiring configuration of a Rosemount dual-element RTD is shown (R=Red, W=White,
G=Green, B=Black)

Sensor Connections

Figure 2-9 on page 2-10 shows the correct sensor wiring connections to the
transmitter sensor terminals. To ensure an adequate sensor connection,
anchor the sensor lead wires beneath the flat washer on the terminal screw.
Do not remove the transmitter cover in explosive atmospheres if the circuit is
live. Both transmitter covers must be fully engaged to meet explosion-proof
requirements. Use extreme caution when making contact with the leads and
terminals.
RTD or Ohm Inputs
If the transmitter is mounted remotely from a 3- or 4-wire RTD, it will operate
within specifications, without recalibration, for lead wire resistances of up to
10 ohms per lead (equivalent to 1,000 feet of 20 AWG wire). In this case, the
leads between the RTD and transmitter should be shielded. If using only two
leads (or a compensation loop lead wire configuration), both RTD leads are in
series with the sensor element, so significant errors can occur if the lead
lengths exceed one foot of 20 AWG wire. For longer runs, attach a third or
fourth lead as described above. To eliminate 2-wire lead resistance error, the
2-wire offset command can be used. This allows the user to input the
measured lead wire resistance, resulting in the transmitter adjusting the
temperature to correct the error.

2-10

3144-0000F05A

B

Reference Manual
00809-0100-4021, Rev BA
April 2003

Model 3144P
Thermocouple or Millivolt Inputs
For direct-mount applications, connect the thermocouple directly to the
transmitter. If mounting the transmitter remotely from the sensor, use
appropriate thermocouple extension wire. Make connections for millivolt
inputs with copper wire. Use shielding for long runs of wire.
NOTE
The use of two grounded thermocouples with a dual option Model 3144P
transmitter is not recommended. For applications in which the use of two
thermocouples is desired, connect either two ungrounded thermocouples,
one grounded and one ungrounded thermocouple, or one dual element
thermocouple.

Power/Current Loop
Connections

Use copper wire of a sufficient size to ensure that the voltage across the
transmitter power terminals does not go below 12.0 V dc.
1. Connect the current signal leads as shown in Figure 2-10.
2. Recheck the polarity and correctness of connections.
3. Turn the power ON.
For information about multichannel installations, refer to page 2-14.
NOTE
Do not connect the power/signal wiring to the test terminal. The voltage
present on the power/signal leads may burn out the reverse-polarity
protection diode that is built into the test terminal. If the test terminal’s reverse
polarity protection diode is burned out by the incorrect power/signal wiring, the
transmitter can still be operated by jumping the current from the test terminal
to the “–” terminal. See “Test Terminal” on page 4-3 for use of the terminal.

Power/Signal Terminals
The signal wire may be grounded at
any point or left ungrounded.

250 
 ≤RL ≤1100 


or*

Power
Supply

AMS software or a HART Communicator can be connected at any termination
point in the signal loop. The signal loop must have between 250 and 1100 ohms
load for communications.

3144-0000A04A

Figure 2-10. Connecting
a Communicator to a
Transmitter Loop.

2-11

Reference Manual
00809-0100-4021, Rev BA
April 2003

Model 3144P
POWER SUPPLY

An external power supply is required to operate the Model 3144P (not
included). The input voltage range of the transmitter is 12 to 42.4 V DC. This
is the power required across the transmitter power terminals. The power
terminals are rated to 42.4 V DC. With 250 ohms of resistance in the loop, the
transmitter will require a minimum of 18.1 V DC for communication.
The power supplied to the transmitter is determined by the total loop
resistance and should not drop below the lift-off voltage. The lift-off voltage is
the minimum supply voltage required for any given total loop resistance. See
Figure 2-11 to determine the required supply voltage. If the power drops
below the lift-off voltage while the transmitter is being configured, the
transmitter may output incorrect information.
The dc power supply should provide power with less than 2% ripple. The total
resistance load is the sum of the resistance of the signal leads and the load
resistance of any controller, indicator, or related piece of equipment in the
loop. Note that the resistance of intrinsic safety barriers, if used, must be
included.
NOTE
Do not allow the voltage to drop below 12.0 V dc at the transmitter terminals
when changing transmitter configuration parameters, or permanent damage
to the transmitter could result.

Maximum Load = 40.8 X (Supply Voltage - 12.0)

Load (Ohms)

Figure 2-11. Load Limits.

4–20 mA dc

1240
1100
1000
750
500

Operating
Region

250
0
10

Surges/Transients

20
30
40 42.4
12.0
Supply Voltage (V dc)

The transmitter will withstand electrical transients of the energy level usually
encountered in static discharges or induced switching. However, high-energy
transients, such as those induced in wiring from nearby lightning strikes, can
damage both the transmitter and the sensor.
To protect against high-energy transients, install the integral transient
protection board (option code T1) or the Rosemount Model 470 Transient
Protector. The integral transient protection board is available as an ordered
option or as an accessory. Refer to “ Transient Protection (Option Code T1)”
on page A-16 for more information. The Model 470 transient protector is
available only as an accessory. Refer to the Model 470 Transient Protector
Product Data Sheet (document number 00813-0100-4191) for more
information.

2-12

Reference Manual
00809-0100-4021, Rev BA
April 2003

Grounding

Model 3144P
Shielding
The currents in the leads induced by electromagnetic interference can be
reduced by shielding. Shielding carries the current to ground and away from
the leads and electronics. If the ends of the shields are adequately grounded,
little current will actually enter the transmitter.
If the ends of the shield are left ungrounded, a voltage is created between the
shield and the transmitter housing and also between the shield and earth at
the element end. The transmitter may not be able to compensate for this
voltage, causing it to lose communication and/or go into alarm. Instead of the
shield carrying the currents away from the transmitter, the currents will now
flow through the sensor leads into the transmitter circuitry where they will
interfere with the circuit operation.
Shielding Recommendations
The following are recommended practices are from API Standard 552
(Transmission Standard) section 20.7 and from field and laboratory testing. If
more than one recommendation is given for a sensor type, start with the first
technique shown or the technique that is recommended for the facility by its
installation drawings. If the technique does not eliminate the transmitter
alarms, try another technique. If all techniques unsuccessfully prevent
transmitter alarms due to high EMI, contact a Emerson Process Management
representative.
Ungrounded Thermocouple, mV, and RTD/Ohm Inputs
Option 1: recommended for ungrounded transmitter housing
1. Connect the signal wiring shield to the sensor wiring shield.
2. Ensure the two shields are tied together and electrically isolated from
the transmitter housing.
3. Ground the shield at the power supply end only.
4. Ensure the shield at the sensor is electrically isolated from the
surrounding fixtures that may be grounded.
Sensor Wires

4–20 mA loop

Shield ground point
Connect shields together, electrically isolated from the transmitter

2-13

Reference Manual
00809-0100-4021, Rev BA
April 2003

Model 3144P

Option 2: recommended for grounded transmitter housing
1. Connect the sensor wiring shield to the transmitter housing, provided
the transmitter housing is grounded (see "Transmitter Housing").
2. Ensure the shield at the sensor end is electrically isolated from
surrounding fixtures that may be grounded.
3. Ground the signal wiring shield at the power supply end.
Sensor Wires

4–20 mA loop

Shield ground points

Option 3
1. Ground the sensor wiring shield at the sensor, if possible.
2. Ensure the sensor wiring and signal wiring shields are electrically
isolated form the transmitter housing and other fixtures that may
be grounded.
3. Ground the signal wiring shield at the power supply end.
Sensor Wires

4–20 mA loop

Shield ground points

Grounded Thermocouple Inputs
1. Ground the sensor wiring shield at the sensor.
2. Ensure the sensor wiring and signal wiring shields are electrically
isolated form the transmitter housing and other fixtures that may
be grounded.
3. Ground the signal wiring shield at the power supply end.
Sensor Wires

4–20 mA loop

Shield ground points

Transmitter Housing
Ground the transmitter housing in accordance with local electrical
requirements. An internal ground terminal is standard. An optional external
ground lug assembly (Option Code G1) can also be ordered if needed.
Ordering certain hazardous approvals automatically includes an external
ground lug (see Table A-5 on page A-16).

2-14

Reference Manual
00809-0100-4021, Rev BA
April 2003

Section 3

Model 3144P

Commissioning
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-1
Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-1
Model 275 HART Communicator . . . . . . . . . . . . . . . . . . . . page 3-2
AMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-5
Review Configuration Data . . . . . . . . . . . . . . . . . . . . . . . . page 3-5
Check Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-6
Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-6
Device Output Configuration . . . . . . . . . . . . . . . . . . . . . . . page 3-14
Device Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-18
Measurement Filtering . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-19
Diagnostics and Service . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-21
Multidrop Communication . . . . . . . . . . . . . . . . . . . . . . . . . page 3-23
Use with the HART Tri-Loop . . . . . . . . . . . . . . . . . . . . . . . page 3-24

OVERVIEW

This section contains information on commissioning and tasks that should be
performed on the bench prior to installation. This section contains Model
3144P HART configuration only. HART Communicator and AMS instructions
are given to perform configuration functions. For additional information, refer
to the Model 275 HART Communication Reference Manual (document
number 00809-0100-4275). AMS help can be found in the AMS on-line guides
within the AMS system.

SAFETY MESSAGES

Instructions and procedures in this section may require special precautions to
ensure the safety of the personnel performing the operations. Information that
raises potential safety issues is indicated by a warning symbol ( ). Please
refer to the following safety messages before performing an operation
preceded by this symbol.

Warnings
Explosions may result in death or serious injury.
•

Do not remove the instrument cover in explosive atmospheres when the circuit is
live.

•

Before connecting a HART communicator in an explosive atmosphere, make sure
the instruments in the loop are installed in accordance with intrinsically safe or
non-incendive field wiring practices.

•

Both covers must be fully engaged to meet explosion–proof requirements.

Electrical shock could cause death or serious injury. If the sensor is installed in a
high-voltage environment and a fault or installation error occurs, high voltage may be
present on transmitter leads and terminals.
•

www.rosemount.com

Use extreme caution when making contact with the leads and terminals.

Reference Manual

Model 3144P

00809-0100-4021, Rev BA
April 2003

MODEL 275 HART
COMMUNICATOR

The HART Communicator exchanges information with the transmitter from
the control room, the instrument site, or any wiring termination point in the
loop. To facilitate communication, connect the HART Communicator in parallel
with the transmitter (see Figure 2-11). Use the loop connection ports on the
rear panel of the HART Communicator. The connections are non-polarized.
Do not make connections to the serial port or the NiCad recharger jack in
explosive atmospheres. Before connecting the HART communicator in an
explosive atmosphere, make sure the instruments in the loop are installed in
accordance with intrinsically safe or non-incendive field wiring practices

Updating the Model 275
HART Communication
Software

You may need to upgrade the Model 275 HART Communicator software to
take advantage of the additional features available in the Model 3144P (field
device revision 3). Perform the following steps to determine if an upgrade is
required.
1. Turn on your communicator and select 4 Utility, then 5 Simulation.
2. Choose “Rosemount” from the list of manufacturers and “3144 Temp”
from the list of models.
3. If the Fld Dev Rev choices include “Dev v3, DD v2,” an upgrade is not
required. If the only choice is “Dev v1” or “Dev v2” (with any DD version),
than the communicator should be upgraded.
NOTE
If you initiate communication with an improved Model 3144P using a
communicator that only has a previous version of the transmitter device
descriptors (DDs), the communicator will display the following message:
NOTICE: Upgrade 275 software to access new XMTR functions.
Continue with old description?
If you select YES, the communicator will communicate properly with the
transmitter using the existing transmitter DDs. However, new software
features of the DD in the communicator will not be accessible. If you select
NO, the communicator will default to a generic transmitter functionality.
If YES is selected when the transmitter is already configured to utilize the new
features of the improved transmitters (such as Dual Input configuration or one
of the added sensor input types–DIN Type L or DIN Type U), the user will
experience trouble communicating with the transmitter and will be prompted
to turn the communicator off. To prevent this from happening, either upgrade
the communicator to the latest DD or answer NO to the question above and
default to the generic transmitter functionality.
To see a list of enhancements included in the improved transmitters, see
“Model 3144P and Models 3144 / 3244MV Differences” on page 1-3.

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Reference Manual
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April 2003

Menu Tree

Model 3144P
Figure 3-1 displays a complete Model 3144P menu tree for use with the
Model 275 HART Communicator. Options listed in bold type indicate that a
selection provides other options.

Figure 3-1. HART Communicator Menu Tree
Online Menu
1.
2.
3.
4.
5.
6.
7.

1. PROCESS
VARIABLE

DEVICE SETUP
PV is
PV
AO
% RNGE
PV LRV
PV URV

1. Device Variables
2. PV is
3. PV Digital
4. PV AO
5. PV% rnge
6. PV LRV
7. PV URV
8. PV LSL
9. PV USL
10.PV Damp

1.
2.
3.
4.
5.
6.
1.
2.
3.
4.

1. TEST DEVICE
2. DIAGNOSTICS
AND SERVICE

2. CALIBRATION

3. CONFIGURATION

1. VARIABLE
MAPPING

2. SENSOR
CONFIGURATION

Snsr 1
Snsr 2
Terminal
Diff.
Avg
First Good
Loop Test
Self test
Master Reset
Status

1. Snsr inp trim
2. Snsr trim-fact
3. Active Calibrator

1. SNSR TRIM
2. D/A trim
3. Scaled D/A trim
1.
2.
3.
4.
5.

1.
2.
3.
4.
5.
6.

1. Sensor 1
2. Sensor 2

PV is
SV is
TV is
QV is
Variable re-map

1.
2.
3.
4.
5.
6.

1. Chng Type/Conn
2. Show Type/Conn

Snsr 2 Units
Snsr 2 damp
Snsr 2 S/N
Snsr 2 LSL
Snsr 2 USL
2-Wire Offset

1.
2.
3.
4.

3. Sensor 1 Setup
1.
2.
3.
4.

4. Sensor 2 Setup
5. Term Temp Setup
3. DUAL-SENSOR
CONFIGURATION

4. DEV OUTPUT
CONFIGURATION

1.
2.
3.
4.
5.

Diff Config
Avg Config
First Good Config
Config Hot Backup
Drift Alert

1. PV RANGE
VALUES

2. ALARM
SATURATION

NOTE
The review menu
lists all of the
information
stored in the
Model 3144P. This
includes device
information,
measuring
element, output
configuration, and
software revision.

5. DEVICE
INFORMATION

6. MEASUREMENT
FILTERING

4. REVIEW

1.
2.
3.
4.
5.

1.
2.
3.
4.
1.
2.
3.
4.
5.
6.
7.

Diff Units
Diff Damp
Diff LSL
Diff USL

First Good Units
First Good Damp
First Good LSL
First Good USL

1. AO alrm type
2. AO Levels
3. Non-PV Alarms
1.
2.
3.
4.

4. LCD METER
OPTIONS

1. Meter Configuration
2. Meter Decimal Point
3. Meter Bar Graph

Tag
Date
Descriptor
Message
Final Assembly number

Terminal Units
Terminal Damp
Terminal LSL
Terminal USL

Avg Units
Avg Damp
Avg LSL
Avg USL

1. Drift Alert option
2. Drift Limit
3. Drift Damping

PV LRV
PV URV
PV Damping
PV Units
PV LSL
PV USL
PV Min. Span

3. HART OUTPUT

1.
2.
3.
4.
5.

1.
2.
3.
4.

Snsr 1 Units
Snsr 1 damp
Snsr 1 S/N
Snsr 1 LSL
Snsr 1 USL
2-Wire Offset

1.
2.
3.
4.
5.

Low Alarm
High Alarm
Low Sat.
High Sat.
Preset Alarms

Poll addr
Num req preams
Burst mode
Burst option

1.
2.
3.
4.

50/60 Hz Filter
Intermit Detect
Intermit Thresh
Open Sensor
Holdoff

Revision #s
Dynamic Variables
Device Variables
Sensor Variables
Other Variables

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Reference Manual
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April 2003

Fast Key Sequences

Model 3144P
Fast key sequences are listed below for common transmitter functions.
NOTE:
The fast key sequences assume that Device Descriptor Dev v3, DD v2 is
being used. Table 3-1 provides alphabetical function lists for all Model 275
HART Communicator tasks as well as their corresponding fast key
sequences.

Table 3-1. Model 3144P Fast
Key Sequence
Function

HART Fast Keys

Function

HART Fast Keys

Active Calibrator
Alarm Values
Analog Output
Average Temperature Setup
Average Temperature Configuration
Burst Mode
Burst Option
Calibration
Configure Hot Backup
Configuration
D/A Trim
Damping Values
Date
Descriptor
Device Information
Diagnostics and Service
Differential Temperature Setup
Differential Temperature Configuration
Drift Alert
Filter 50/60 Hz
First Good Temperature Setup
First Good Temperature Configuration
Hardware Revision
Hart Output
Intermittent Sensor Detect
Intermittent Threshold
Loop Test
LRV (Lower Range Value)
LSL (Lower Sensor Limit)
Master Reset
Message
Meter Options

1, 2, 2, 1, 3
1, 3, 4, 2, 1
1, 1, 4
1, 3, 1, 5, 4
1, 3, 3, 2
1, 3, 4, 3, 3
1, 3, 4, 3, 4
1, 2, 2
1, 3, 3, 4
1, 3
1, 2, 2, 2
1, 3, 4, 1, 3
1, 3, 5, 2
1, 3, 5, 3
1, 3, 5
1, 2
1, 3, 1, 5, 3
1, 3, 3, 1
1, 3, 3, 5
1, 3, 6, 1
1, 3, 1, 5, 5
1, 3, 3, 3
1, 4, 1
1, 3, 4, 3
1, 3, 6, 2
1, 3, 6, 3
1, 2, 1, 1
1, 3, 4, 1, 1
1, 3, 4, 1, 5
1, 2, 1, 3
1, 3, 5, 4
1, 3, 4, 4

Open Sensor Holdoff
Percent Range
Poll Address
Process Temperature
Process Variables
Range Values
Review
Scaled D/A Trim
Sensor 1 Configuration
Sensor 2 Configuration
Sensor Limits
Sensor 1 Serial Number
Sensor 2 Serial Number
Sensor 1 Setup
Sensor 2 Setup
Sensor Trim
Sensor Type
Sensor 1 Unit
Sensor 2 Unit
Software Revision
Status
Tag
Terminal Temperature Setup
Test Device
Transmitter-Sensor Matching
URV (Upper Range Value)
USL (Upper Sensor Limit)
Variable Mapping
Wires
2-wire Offset Sensor 1
2-wire Offset Sensor 2

1, 3, 6, 4
1, 1, 5
1, 3, 4, 3, 1
1, 1
1, 1
1, 3, 4, 1
1, 4
1, 2, 2, 3
1, 3, 2, 1, 1
1, 3, 2, 1, 2
1, 3, 2, 2
1, 3, 2, 3, 3
1, 3, 2, 4, 3
1, 3, 2, 3
1, 3, 2, 4
1, 2, 2, 1, 1
1, 3, 2, 1
1, 3, 2, 3, 1
1, 3, 2, 4, 1
1, 4, 1
1, 2, 1, 4
1, 3, 5, 1
1, 3, 2, 5
1, 2, 1
1, 3, 2, 1, 1
1, 3, 4, 1, 2
1, 3, 4, 1, 6
1, 3, 1
1, 3, 2, 1, 1
1, 3, 2, 3, 6
1, 3, 2, 4, 6

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Reference Manual
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April 2003

AMS

Model 3144P
One of the key benefits of intelligent devices is the ease of device
configuration. When used with AMS, the Model 3144P is easy to configure
and provides instant and accurate alerts and alarms. The main configuration
screen of the Model 3144P is the “Configuration Properties” screen. From this
screen, the transmitter set-up can easily be viewed and edited.

The screens use a color-coding to give visual indication of the transmitter
health and to indicate any changes that may need to be made or written to the
transmitter.
• Gray screens: indicates that all information has been written to the
transmitter
• Yellow on screen: changes have been made in the software but not
sent to the transmitter
• Green on screen: all current changes on screen have been written to
the transmitter
• Red on screen: indicates an alarm or alert that requires immediate
investigation

Apply AMS Changes

Changes made in the software must be sent to the transmitter in order for the
changes to take effect in the process.
1. From the bottom of the “Configuration Properties” screen, click Apply.
2. An “Apply Parameter Modification” screen appears, enter desired
information and click OK.
3. After carefully reading the warning provided, select OK.

REVIEW
CONFIGURATION DATA

Before operating the Model 3144P in an actual installation, review all of the
factory-set configuration data to ensure that it reflects the current application.
Review
HART Fast Keys

1, 4

Review the transmitter configuration parameters set at the factory to ensure
accuracy and compatibility with the particular application. After activating the
Review function, scroll through the data list to check each variable. If changes
to the transmitter configuration data are necessary, refer to “Configuration”
below.
AMS
Right click on the device and select “Configuration Properties” from the
menu. Select the tabs to review the transmitter configuration data.

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Reference Manual
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April 2003

CHECK OUTPUT

Model 3144P
Before performing other transmitter online operations, review the
configuration of the Model 3144P digital output parameters to ensure that the
transmitter is operating properly.
Process Variables
HART Fast Keys

1, 1

The Model 3144P process variables provide the transmitter output. The
PROCESS VARIABLE menu displays the process variables, including sensed
temperature, percent range, and analog output. These process variables are
continuously updated. The primary variable is 4–20 mA analog signal.
AMS
Right click on the device and select “Configuration Properties” from the
menu. Select the Analog Output tab to review the transmitter Analog
Output Range.

CONFIGURATION

The Model 3144P must be configured for certain basic variables to operate.
In many cases, these variables are pre-configured at the factory.
Configuration may be required if the configuration variables need revision.
Variable Mapping
HART Fast Keys

1, 3, 1

The Variable Mapping menu displays the sequence of the process variables.
Select 5 Variable Re-Map to change this configuration. With the Model 3144P
single sensor input configuration, screens follow that allow selection of the
primary variable (PV) and the secondary variable (SV). When the Select PV
screen appears Snsr 1 or terminal temperature must be selected.
With the Model 3144P dual-sensor option configuration, screens follow that
allows selection of the primary variable (PV), secondary variable (SV), tertiary
variable (TV), and quaternary variable (QV). Variable choices are Sensor 1,
Sensor 2, Differential Temperature, Average Temperature, First-Good
Temperature, Terminal Temperature, and Not Used. The primary variable is
the 4–20 mA analog signal.
AMS
Right click on the device and select “Configuration Properties” from the
menu. Select the Analog Output tab to review the Mapped Variable
Output.
Apply changes made (see “Apply AMS Changes” on page 3-5).
Sensor Configuration
HART Fast Keys

1, 3, 2

Sensor configuration contains information for updating the sensor type,
connections, units, and damping.

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Reference Manual
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April 2003

Model 3144P
Change Type and Connections
HART Fast Keys

1, 3, 2, 1

The Connections command allows the user to select the sensor type and the
number of sensor wires to be connected. Select from the following sensor
types:
•

2-, 3-, or 4-wire Pt 100, Pt 200, Pt 500, Pt 1000
platinum RTDs (α = 0.00385 Ω/Ω/°C)

•

2-, 3-, or 4-wire Pt 100 (α = 0.003916 Ω/Ω/°C)

•

2-, 3-, or 4-wire Ni 120 nickel RTDs

•

2-, 3-, or 4-wire Cu 10 RTDs

•

IEC/NIST/DIN Type B, E, J, K, R, S, T thermocouples

•

DIN type L, U thermocouples

•

ASTM Type W5Re/W26Re thermocouple

•

–10 to 100 millivolts

•

2-, 3-, or 4-wire 0 to 2000 ohms

Contact a Emerson Process Management representative for information on
the temperature sensors, thermowells, and accessory mounting hardware
that is available through Emerson Process Management.
AMS
Right click on the device and select “Configuration.” Select “Sensor
Connections,” then “Change type and connection.” The wizard will walk
through the screens.
Output Units
HART Fast Keys

1, 3, 2, 3 or 4

The Snsr 1 Unit and Snsr 2 Unit commands set the desired primary variable
units. Set the transmitter output to one of the following engineering units:
•

Degrees Celsius

•

Degrees Fahrenheit

•

Degrees Rankine

•

Kelvin

•

Ohms

•

Millivolts

AMS
Right click on the device and select “Configuration Properties” from the
menu. Select the Sensor 1 (or Sensor 2) tab to configure the Sensor
Ouput Units. Set the units to the desired output.
Apply changes made (see “Apply AMS Changes” on page 3-5).

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Reference Manual
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April 2003

Model 3144P
Sensor 1 Serial Number
HART Fast Keys

1, 3, 2, 3, 3

The Sensor 1 S/N variable provides a location to list the serial number of the
attached sensor. It is useful for identifying sensors and tracking sensor
calibration information.
AMS
Right click on the device and select “Configuration Properties” from the
menu. Select the Sensor 1 tab to configure the Sensor 1 Serial #.
Apply changes made (see “Apply AMS Changes” on page 3-5).
Sensor 2 Serial Number
HART Fast Keys

1, 3, 2, 4, 3

The Sensor 2 S/N variable provides a location to list the serial number of a
second sensor.
AMS
Right click on the device and select “Configuration Properties” from the
menu. Select the Sensor 2 tab to configure the Sensor 2 Serial #.
Apply changes made (see “Apply AMS Changes” on page 3-5).
2-Wire RTD Offset
HART Fast Keys

1, 3, 2, 3, 6

The 2-wire Offset command allows the user to input the measured lead wire
resistance, which will result in the transmitter adjusting its temperature
measurement to correct the error caused by this resistance. Due to a lack of
lead wire compensation within the RTD, temperature measurements made
with a 2-wire RTD are often inaccurate.
To utilize this feature perform the following steps:
1. Measure the lead wire resistance of both RTD leads after installing the
2-wire RTD and the Model 3144P.
2. From the HOME screen, select 1 Device Setup, 3 Configuration,
2 Sensor Configuration, 3 Sensor 1 Setup, 6 2-Wire Offset.
3. Enter the total measured resistance of the two RTD leads at the 2-Wire
Offset prompt. Enter this resistance as a negative (–) value to ensure
proper adjustment.The transmitter then adjusts its temperature
measurement to correct the error caused by lead wire resistance.
4. Repeat Steps 1 through 3 for sensor 2, selecting 1 Device Setup, 3
Configuration, 2 Sensor Configuration, 4 Sensor 2 Setup, 6 2-Wire
Offset.
AMS
Right click on the device and select “Configuration Properties” from the
menu. Select the Sensor 1 (or Sensor 2) tab to configure the 2 Wire Offset.
Apply changes made (see “Apply AMS Changes” on page 3-5).

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Reference Manual
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April 2003

Model 3144P
Terminal Temperature
HART Fast Keys

1, 3, 2, 5

The Terminal Temp command sets the terminal temperature units to indicate
the temperature at the transmitter terminals.
AMS
Right click on the device and select “Configuration Properties” from the
menu. Select the Electronics tab to configure the Terminal Temperature. In
the Terminal Temperature box, Set the Termnl Units to the desired output.
Apply changes made (see “Apply AMS Changes” on page 3-5).
Dual-Sensor Configuration
HART Fast Keys

1, 3, 3

Dual-sensor configuration allows configuration of the functions that can be
used with a dual-sensor configured transmitter. This includes Differential
Temperature, Average Temperature, First Good Temperature, Hot Backup,
and Sensor Drift Alert.
Differential Temperature
HART Fast Keys

1, 3, 1, 5, 3

The Model 3144P configured for a dual-sensor can accept any two inputs
and display the differential temperature between them. Use the following
procedure to configure the transmitter to measure differential temperature.
First, configure Sensor 1 and Sensor 2 appropriately. Select 1 Device
Setup, 3 Configuration, 2 Sensor Configuration, 1 Change type/conn to set
the sensor type and number of wires for Sensor 1. Repeat for Sensor 2.
NOTE
This procedure reports the differential temperature as the primary variable
analog signal. If this is not necessary, assign differential temperature to the
secondary, tertiary, or quaternary variable.
1. From the HOME screen, select 1 Device Setup, 3 Configuration, 1
Variable Mapping, 5 Variable Re-Map to prepare to set the transmitter
to display differential temperature. Set the control loop to manual and
select OK.
2. Select 3 Diff from the Primary Variable (PV) menu.
3. Select three of the five variables (average temperature, sensor 1, sensor
2, First-Good, and terminal temperature) for the Secondary Variable
(SV), Tertiary Variable (TV), and Quaternary Variable (QV).
NOTE
The transmitter determines the differential temperature by subtracting
Sensor 2 from Sensor 1 (S1 – S2). Ensure that this order of subtraction is
consistent with the desired reading for the application. Refer to Figure 2-12 on
page 2-16, or inside the transmitter terminal-side cover for sensor wiring
diagrams.

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April 2003

Model 3144P
4. Select OK after verifying the variable settings from the variable mapping
menu.
5. Select OK to return the control loop to automatic control.
6. Select HOME to return to the Online menu.
7. Select 1 Device Setup, 3 Configuration, 3 Dual-sensor configuration, 1
Differential Config, 1 Differential Units to set the desired differential units.
8. Select HOME to return to the Home screen.
If you are using a LCD meter for local indication, configure the meter to
read the appropriate variables using the “LCD Meter Options” on
page 3-17.
AMS
For AMS, configure each sensor as indicated above.
Right click on the device and select “Configuration Properties” from the
menu. Select the Dual Sensor tab to configure the Differetial
Temperature.In the Differential Temperature box, Set the Diff Units to the
desired output. Set damping if applicable.
Apply changes made (see “Apply AMS Changes” on page 3-5).
Average Temperature
HART Fast Keys

1, 3, 1, 5, 4

The Model 3144P transmitter configured for dual-sensors can output and
display the average temperature of any two inputs. Use the following
procedure to configure the transmitter to measure the average
temperature.
First, configure Sensor 1 and Sensor 2 appropriately. Select 1 Device
Setup, 3 Configuration, 2 Sensor Configuration, 1 Change Type and Conn.
to set the sensor type and number of wires for Sensor 1. Repeat for
Sensor 2.
NOTE
This procedure configures the average temperature as the primary variable
analog signal. If this is not necessary, assign the average temperature to the
secondary, tertiary, or quaternary variable.
1. From the Home screen, select 1 Device Setup, 3 Configuration, 1
Variable Mapping, 5 Variable Re-map to set the transmitter to display the
average temperature. Set the control loop to manual and select OK.
2. Select 4 Sensor Average from the Primary Variable (PV) menu.
3. Select three of the five variables (differential temperature, sensor 1,
sensor 2, First-Good, and terminal temperature) for the Secondary
Variable (SV), Tertiary Variable (TV), and Quaternary Variable (QV).
4. Select OK after verifying the variable settings in variable mapping menu.
5. Select OK to return the control loop to automatic control.
6. Select HOME to return to the Online menu.
7. Select 1 Device Setup, 3 Configuration, 3 dual sensor configuration, 2
average, 1 avg units to set the desired average temperature units.
8. Select HOME to return to the Home screen.

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Model 3144P
If using a LCD meter, configure it to read the appropriate variables using
“LCD Meter Options” on page 3-17.
NOTE
If Sensor 1 and/or Sensor 2 should fail while PV is configured for average
temperature and Hot Backup is not enabled, the transmitter will go into alarm.
For this reason, when PV is Sensor Average it is recommended that Hot
Backup be enabled when dual-element sensors are used or when two
temperature measurements are taken from the same point in the process. If a
sensor failure occures when Hot Backup is enabled while PV is Sensor
Average, three scenarios could result:
• If Sensor 1 fails, the average will only be reading from Sensor 2, the
working sensor.
• If Sensor 2 fails, the average will only be reading from Sensor 1, the
working sensor.
• If both sensors fail simultaneously, the transmitter will go into alarm and
the status available (via HART) states that both Sensor 1 and Sensor 2
have failed.
In the first two scenarios, where Hot Backup is enabled with PV set to Sensor
Average, the 4-20 mA signal is not disrupted and the status available to the
control system (via HART) specifes which sensor has failed.
AMS
For AMS, configure each sensor as indicated above.
Right click on the device and select “Configuration Properties” from the
menu. Select the Dual Sensor tab to configure the Average
Temperature.In the Average Temperature box, Set the Ave Units to the
desired output. Set damping if applicable.
Apply changes made (see “Apply AMS Changes” on page 3-5).
First-Good Configuration
HART Fast Keys

1, 3, 1, 5, 5

The First Good device variable is useful for applications in which
dual-sensors (or a single dual element sensor) are used in a single
process. The first good variable will report the Sensor 1 value, unless
Sensor 1 fails. When Sensor 1 fails, the Sensor 2 value will be reported as
the first good variable. Once the first good variable has switched to Sensor
2, it will not revert back to Sensor 1 until a master reset occurs or
“Suspend Non-PV alarms” is disabled. When the PV is mapped to first
good and either Sensor 1 or Sensor 2 fails, the analog output will go to the
alarm level, but the digital PV value read through the HART interface will
still report the proper first good sensor value.
If it is desired that the transmitter not go into analog output alarm while
having the PV mapped to first good and Sensor 1 fails, enable “Suspend
Non-PV Alarm” mode. This combination will prevent the analog ouput from
going to the alarm level unless BOTH sensors fail.
AMS
For AMS, configure each sensor as indicated above.

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Model 3144P
Right click on the device and select “Configuration Properties” from the
menu. Select the Dual Sensor tab to configure the 1st Good. In the 1st
Good box, set the 1st Good Units to the desired output. Set damping if
applicable.
Apply changes made (see “Apply AMS Changes” on page 3-5).
Hot Backup Configuration
HART Fast Keys

1, 3, 3, 4

The Config Hot BU command configures the transmitter to automatically
use Sensor 2 as the primary sensor if Sensor 1 fails. With Hot Backup
enabled, the primary variable (PV) must either be First Good or Sensor
Average (see “Average Temperature” on page 3-10 for details on using
Hot Backup when PV is Sensor Average). You can map Sensors 1 or 2 as
the secondary variable (SV), tertiary variable (TV), or quaternary variable
(QV). In the event of a primary variable (Sensor 1) failure, the transmitter
enters Hot Backup mode and Sensor 2 becomes the PV. The 4–20 mA
signal is not disrupted and a status is available to the control system (via
HART) that Sensor 1 has failed. An LCD meter, if attached, also displays
the failed sensor status.
While configured to Hot Backup, if Sensor 2 fails while Sensor 1 is still
operating properly, the transmitter continues to report the PV 4–20 mA
analog output signal while a status is available to the control system (via
HART) that Sensor 2 has failed. In Hot Backup mode, the transmitter will
not revert back to Sensor 1 to control the 4–20 mA analog output until the
Hot Backup mode is reset. Reset Hot Backup either by re-enabling via
HART or by briefly powering down the transmitter.
To set up and enable the Hot Backup feature for the Model 3144P
transmitter, perform the following procedure:
1. Attach any two sensors to the transmitter as shown in Figure 2-12 on
page 2-16.
2. From the Home screen, select 1 Device Setup, 3 Configuration, 1
Variable Mapping, 5 Variable Re-map to set primary, secondary, tertiary,
and quaternary variables. The communicator displays the PV, SV, TV,
and QV menus in succession.
3. Set PV as First Good or Sensor Average; set secondary, tertiary, and
quaternary variables as desired.
4. Select OK after verifying the variable settings from the Variable Mapping
menu.
5. Select OK to return the control loop to automatic control. Select HOME
to return to the Home screen.
6. From the Home screen, select 1 Device Setup, 3 Configuration, 2
Sensor Configuration, 1 Change Type and Conn, 3 Sensor 1 Setup to
configure Sensor 1.
7. Set the sensor type, number of wires, damping, and units for Sensor 1.
8. Select SEND to download the new data to the transmitter. Select HOME
to return to the Home screen.
9. Repeat Steps 5, 6, and 7 for Sensor 2 using 4 Sensor 2 Setup.

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Model 3144P
10. From the Home screen, select 1 Device Setup, 3 Configuration, 3 Dual
Sensor Configuration, 4 Configure Hot Backup to prepare to configure
the transmitter for Hot Backup.
11. Select yes to enable Hot Backup.
12. Select OK after you set the control loop to manual.
13. Select 1 Average or 2 First Good to set Hot Backup PV.
14. Select OK after you return the control loop to automatic control.
For information on using Hot Backup in conjunction with the HART Tri-Loop
see “Use with the HART Tri-Loop” on page 3-24.
AMS
For AMS, configure each sensor as indicated above.
Right click on the device and select “Configuration.” Select “Configure Hot
Backup.” The wizard will walk through the screens.
Drift Alert Configuration
HART Fast Keys

1, 3, 3, 5

The Drift Alert command allows the user to configure the transmitter to set
a warning flag (via HART) or go into analog alarm when the temperature
difference between Sensor 1 and Sensor 2 exceeds a user-defined limit.
This feature is useful when measuring the same process temperature with
two sensors, ideally when using a dual-element sensor. When Drift Alert
mode is enabled, the user will set the maximum allowable difference, in
engineering units, between Sensor 1 and Sensor 2. If this maximum
difference is exceeded, a drift alert warning flag will be set.
When configuring the transmitter for Drift Alert the user also has the option
of specifying that the analog output of the transmitter go into alarm when
sensor drifting is detected.
NOTE
The Drift Alert alarm cannot be enabled while Hot Backup is enabled. The
Drift Alert warning, however, can be used simultaneously with Hot Backup.
For information on configuring the transmitter for Hot Backup see page 3-12.
To set up and enable the Drift Alert feature of the Model 3144P, perform
the following procedure:
1. Attach any two sensors to the transmitter as shown in Figure 2-12 on
page 2-16.
2. From the Home screen, select 1 Device Setup, 3 Configuration, 1
Variable Mapping, 5 Variable Re-map to set primary, secondary, tertiary,
and quaternary variables. The communicator displays the PV, SV, TV,
and QV menus in succession.
3. Select primary, secondary, tertiary, and quaternary variables as desired.
4. Select OK after verifying the variable settings from the Variable Mapping
menu.

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5. Select OK to return the control loop to automatic control. Select HOME
to return to the Home screen.
6. From the Home screen, select 1 Device Setup, 3 Configuration, 2
Sensor Configuration, 1 Change Type and Conn, 3 Sensor 1 Setup to
configure Sensor 1.
7. Set the sensor type, number of wires, damping, and units for Sensor 1.
8. Select SEND to download the new data to the transmitter. Select HOME
to return to the Home screen.
9. Repeat steps 6 – 8 for Sensor 2 using 4 Sensor 2 setup.
10. From the Home screen select 1 Device Setup, 3 Configuration, 3
Dual-Sensor Configuration, 5 Drift Alert to prepare to configure the
transmitter for Drift Alert.
11. Select 2 Drift Limit. Enter the maximum acceptable difference between
Sensor 1 and Sensor 2.
12. Select 3 Drift Damping to enter a drift alert damping value. This value
must be between 0 and 32 seconds.
13. Select 1 Drift Alert Option and select Enable Alarm or Warning only.
14. Select SEND to download the alarm setting to the transmitters.
NOTE
Enabling Drift Alert Option Warning only (Step 13) will set a flag (via HART)
whenever the maximum acceptable difference between Sensor 1 and Sensor
2 has been exceeded. If it is desired for the the transmitter’s analog signal to
go into alarm when Drift Alert is detected, select Alarm in Step 13. The Drift
Alert alarm cannot be enabled when Hot Backup is enabled; The Drift Alert
alarm can only be enabled if Hot Backup is disabled.
AMS
For AMS, configure each sensor as indicated above.
Right click on the device and select “Configuration Properties” from the
menu. Select the Dual Sensor tab to configure the Senosr Drift Alert. In the
Drift Alert box, enable the Drift Alert Option. Enter the DrftLm limit and
define the Drift Limit Units. Set damping if applicable.
Apply changes made (see “Apply AMS Changes” on page 3-5).

DEVICE OUTPUT
CONFIGURATION

Device output configuration contains PV range values, alarm and saturation,
HART output, and LCD meter options.
PV Range Values
HART Fast Keys

1, 3, 4, 1

The PV URV and PV LRV commands, found in the PV Range Values menu
screen, allow the user to set the transmitter’s lower and upper range values
using limits of expected readings. See Table A-2 on page A-5 for unit and
range setting limits. The range of expected readings is defined by the Lower
Range Value (LRV) and Upper Range Value (URV). The transmitter range
values may be reset as often as necessary to reflect changing process
conditions. From the PV Range Values screen select 1 PV LRV to change the
lower range value and 2 PV URV to change the upper range value.

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Reranging the transmitter sets the measurement range to the limits of the
expected readings. Setting the measurement range to these limits maximizes
transmitter performance; the transmitter is most accurate when operated
within the expected temperature range for the application.
The rerange functions should not be confused with the trim function. Although
reranging the transmitter matches a sensor input to a 4-20 mA output, as in
conventional calibration, it does not affect the transmitter’s interpretation of
the input.
AMS
Right click on the device and select “Configuration Properties” from the
menu. Select the Analog Output tab to define the upper and lower range
values. From the Analog Input Range box, enter the URV and LRV.
Apply changes made (see “Apply AMS Changes” on page 3-5).
Process Variable Damping
HART Fast Keys

1, 3, 4, 1, 3

The PV Damp command changes the response time of the transmitter to
smooth variations in output readings caused by rapid changes in input.
Determine the appropriate damping setting based on the necessary response
time, signal stability, and other requirements of the loop dynamics of the
system. The default damping value is 5.0 seconds and can be reset to any
value between 0 and 32 seconds.
The value chosen for damping affects the response time of the transmitter.
When set to zero (i.e., disabled), the damping function is off and the
transmitter output reacts to changes in input as quickly as the intermittent
sensor algorithm allows. Increasing the damping value increases transmitter
response time.
When damping is enabled, the transmitter will output a value at time (t)
according to the following equation:
Output(t) = Input(ts) – De(–t/damping)
D = input step change at time t = 0
At the time to which the damping time constant is set, the transmitter output is
at 63 percent of the input change; it continues to approach the input according
to the damping equation above.
For example, as illustrated in Figure 3-2, if the temperature undergoes a step
change—from 100 degrees to 110 degrees, and the damping is set to 5.0
seconds, at 5.0 seconds, the transmitter outputs 106.3 degrees, or 63 percent
of the input change, and the output continues to approach the input curve
according to the equation above..

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Model 3144P

Figure 3-2. Change in Input
versus Change in Output with
Damping Enabled.

110.0
109.0

Temperature

108.0
107.0
106.0
105.0
104.0
103.0
102.0

Input Value

101.0

Output Value

100.0
0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

6.5

Time (Seconds)

7.0

7.5

8.0

8.5

9.0

9.5 10.0

AMS
Right click on the device and select “Configuration Properties” from the
menu. If Sensor 1 is mapped as your primary variable, select the Sensor 1
tab.
•

Snr1 damp

Apply changes made (see “Apply AMS Changes” on page 3-5).
Alarm and Saturation
HART Fast Keys

1, 3, 4, 2

The Alarm/Saturation command allows the user to view the alarm settings (Hi
or Low). With this command it is also possible to change the alarm and
saturation values. To change the alarm values and saturation values, select
the value to be changed, either 1 Low Alarm, 2 High Alarm, 3 Low Sat., 4 High
Sat, or 5 Preset Alarms. Enter the desired new value. It must fall within the
guidelines given below.
•

The low alarm value must be between 3.50 and 3.75 mA

•

The high alarm value must be between 21.0 and 23.0 mA

The low saturation level must be between the low alarm value plus 0.1 mA
and 3.9 mA.
Example: The low alarm value has been set to 3.7 mA. Therefore, the low
saturation level, S, must be as follows:
3.8 ≤S ≤3.9 mA.
The high saturation level must be between 20.5 mA and the high alarm value
minus 0.1 mA.
Example: The high alarm value has been set to 20.8 mA. Therefore, the low
saturation level, S, must be as follows:
20.5 ≤S ≤20.7 mA.
Preset alarms can either be 1 Rosemount or 2 NAMUR-compliant. Use the
failure mode switch on the front side of the electronics (see “Switch Location”
on page A-7) to set whether the output will be driven to high or low alarm in
the case of failure.

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Model 3144P
AMS
For AMS, configure each sensor as indicated above.
Right click on the device and select “Configuration Properties” from the
menu. Select the Analog Ouput tab to define the alarm and saturation
levels. From the Alarm box, enter the low and high alarm and the low and
high saturation.
Apply changes made (see “Apply AMS Changes” on page 3-5).
To preset to Rosemount standard or NAMUR NE43 comliant levels:
Right-click on the device and select “Configuration.” Select “Alarm
Configuration” then select “Alarm Configuration” then “Preset alarm
levels.” The wizard will walk through the configuration.
HART Output
HART Fast Keys

1, 3, 4, 3

The HART Output command allows the user to make changes to the
multidrop address, initiate burst mode, or make changes to the burst options.
AMS
Right click on the device and select “Configuration Properties” from the
menu. Select the HART tab to configure for mulidrop and Burst Mode.
Apply changes made (see “Apply AMS Changes” on page 3-5).
LCD Meter Options
HART Fast Keys

1, 3, 4, 4

The LCD Meter Option command sets the meter options, including
engineering units and decimal point. Change the LCD meter settings to reflect
necessary configuration parameters when adding a LCD meter or
reconfiguring the transmitter. Transmitters without LCD meters are shipped
with the meter configuration set to “Not Used.”
To customize variables that the LCD meter displays, follow the steps below:
1. From the home screen select 1 Device Setup, 3 Configuration, 4 Dev
Output Config, 4 LCD Meter Options, and 1 Meter Config.
2. Select the appropriate variable configuration from the Meter
Configuration screen.
3. Press F4, ENTER, and then F2, SEND, to send the information to the
transmitter. The LCD meter will scroll through the outputs selected in
step 2.
To change the decimal point configuration, perform the following steps:
1. From the home screen select 1 Device Setup, 3 Configuration, 4 Dev
Output Config, 4 LCD Meter Options, and 2 Meter Decimal Pt.
2. Choose from Floating Precision or One-, Two-, Three-, or Four-Digit
Precision by pressing F4, ENTER. Press F2 to send the information to
the transmitter.
To change the meter bar graph, perform the following steps:
1. From the home screen, select 1 Device Setup, 3 Configuration, 4 Dev
Output Configuration, 4 LCD Meter options, 3 Meter bar graph.

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2. Choose from Bar Graph offer, Bar graph on by pressing F4, Enter. Press
F2 to send the information to the transmitter.
AMS
Right click on the device and select “Configuration Properties” from the
menu. Select the Device tab to configure the LCD. From the LCD Meter
box, define the Meter Config, Meter Decimal Pt, and Meter Bar Graph.
Apply changes made (see “Apply AMS Changes” on page 3-5).

DEVICE INFORMATION

Access the transmitter information variables online using the HART
Communicator or other suitable communications device. The following is a list
of transmitter information variables. These variables include device identifiers,
factory-set configuration variables, and other information. A description of
each variable, the corresponding fast key sequence, and a review of its
purposes are provided.
Tag
HART Fast Keys

1, 3, 5, 1

The Tag variable is the easiest way to identify and distinguish between
transmitters in multi-transmitter environments. Use it to label transmitters
electronically according to the requirements of the application. The defined
tag is automatically displayed when a HART-based communicator establishes
contact with the transmitter at power-up. The tag may be up to eight
characters long and has no impact on the primary variable readings of the
transmitter.
Date
HART Fast Keys

1, 3, 5, 2

The Date command is a user-defined variable that provides a place to save
the date of the last revision of configuration information. It has no impact on
the operation of the transmitter or the HART-based communicator.
Descriptor
HART Fast Keys

1, 3, 5, 3

The Descriptor variable provides a longer user-defined electronic label to
assist with more specific transmitter identification than is available with the tag
variable. The descriptor may be up to 16 characters long and has no impact
on the operation of the transmitter or the HART-based communicator.
Message
HART Fast Keys

1, 3, 5, 4

The Message variable provides the most specific user-defined means for
identifying individual transmitters in multi-transmitter environments. It allows
for 32 characters of information and is stored with the other configuration
data. The message variable has no impact on the operation of the transmitter
or the HART-based communicator.
AMS
Right click on the device and select “Configuration Properties” from the
menu. Select the Device tab to enter alpahnumeric device information.
Apply changes made (see “Apply AMS Changes” on page 3-5).

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MEASUREMENT
FILTERING

Model 3144P
50/60 Hz Filter
HART Fast Keys

1, 3, 6, 1

The 50/60 Hz Filter command sets the transmitter electronic filter to reject the
frequency of the ac power supply in the plant. The 60 Hz normal, 50 Hz
normal, 60 Hz fast, and 50 Hz fast modes can be chosen (normal mode is the
default mode). On software release 5.3.4, the fast mode cannot be enabled. If
fast mode is selected it will display the normal mode.
NOTE
In high noise environments, normal mode is recommended.
Master Reset
HART Fast Keys

1, 2, 1, 3

Master Reset resets the electronics without actually powering down the unit. It
does not return the transmitter to the original factory configuration.
AMS
Right click on the device and select “Diagnostics and Calibration” from the
menu. Choose “test,” then “Master Reset.”
The wizard will perform the reset
Intermittent Sensor Detect
HART Fast Keys

1, 3, 6, 2

The following steps indicate how to turn the Intermittent Sensor Detect feature
ON or OFF. When the transmitter is connected to a Model 275 HART
Communicator, use the fast key sequence and choose ON or OFF (ON is the
normal setting).
AMS
Right click on the device and select “Configuration Properties” from the
menu. Select the Electronics tab. From the Measurement Filtering Box,
configure the Intermit detect.
The wizard will perform the reset
Apply changes made (see “Apply AMS Changes” on page 3-5).
Intermittent Threshold
HART Fast Keys

1, 3, 6, 3

The threshold value can be changed from the default value of 0.2%. Turning
the Intermittent Sensor Detect feature OFF or leaving it ON and increasing
the threshold value above the default does not affect the time needed for the
transmitter to output the correct alarm signal after detecting a true open
sensor condition. However, the transmitter may briefly output a false
temperature reading for up to one update in either direction (see Figure 3-4 on
page 3-23) up to the threshold value (100% of sensor limits if Intermittent
Sensor Detect is OFF). Unless rapid response rate is necessary, the
suggested setting of the Intermittent Sensor Detect mechanism is ON with
0.2% threshold.

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Model 3144P

Figure 3-3. Open
Sensor Response

20

High Alarm

15

Normal open sensor responses
When Intermittent Sensor Detect is
OFF, a false temperature output is
possible when an open sensor
condition is detected. A false
temperature output in either direction
up to the threshold value (100 % of
sensor limits if Intermittent Sensor
Detect is OFF) is possible when an
open sensor condition is detected.

10
5
0
0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

644-644_03

Transmitter Output (mA)

25

1.6

Time (seconds)

Intermittent Sensor Detect (Advanced Feature)
The Intermittent Sensor Detect feature is designed to guard against process
temperature readings caused by intermittent open sensor conditions (an
intermittent sensor condition is an open sensor condition that lasts less than
one update). By default, the transmitter is shipped with the Intermittent Sensor
Detect feature switched ON and the threshold value set at 0.2% of sensor
limits. The Intermittent Sensor Detect feature can be switched ON or OFF and
the threshold value can be changed to any value between 0 and 100% of the
sensor limits with a HART communicator.
Transmitter Behavior with Intermittent Sensor Detect ON
When the Intermittent Sensor Detect feature is switched ON, the transmitter
can eliminate the output pulse caused by intermittent open sensor conditions.
Process temperature changes (∆T) within the threshold value will be tracked
normally by the transmitter’s output. A ∆T greater than the threshold value will
activate the intermittent sensor algorithm. True open sensor conditions will
cause the transmitter to go into alarm.
The threshold value of the Model 3144P should be set at a level that allows
the normal range of process temperature fluctuations; too high and the
algorithm will not be able to filter out intermittent conditions; too low and the
algorithm will be activated unnecessarily. The default threshold value is 0.2%
of the sensor limits.
Transmitter Behavior with Intermittent Sensor Detect OFF
When the Intermittent Sensor Detect feature is switched OFF, the transmitter
tracks all process temperature changes, even if they are the consequence of
an intermittent sensor. (The transmitter in effect behaves as though the
threshold value had been set at 100%.) The output delay due to the
intermittent sensor algorithm will be eliminated.
AMS
Right click on the device and select “Configuration Properties” from the
menu. Select the Electronics tab. From the Measurement Filtering Box,
configure the Intermit threshold.
Apply changes made (see “Apply AMS Changes” on page 3-5).

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Model 3144P
Open Sensor Holdoff
HART Fast Keys

1, 3, 6, 4

The Open Sensor Holdoff option, at the normal setting, enables the Model
3144P to be more robust under heavy EMI conditions. This is accomplished
through the software by having the transmitter perform additional verification
of the open sensor status prior to activating the transmitter alarm. If the
additional verification shows that the open sensor condition is not valid, the
transmitter will not go into alarm.
For users of the Model 3144P that desire a more vigorous open sensor
detection, the Open Sensor Holdoff option can be changed to a fast setting.
With this setting, the transmitter will report an open sensor condition without
additional verification of the open condition.
AMS
Right click on the device and select “Configuration Properties” from the
menu. Select the Electronics tab. From the Measurement Filtering Box
box, configure the Open Snsr Holdoff.
Apply changes made (see “Apply AMS Changes” on page 3-5).

DIAGNOSTICS AND
SERVICE

Test Device
HART Fast Keys

1, 2, 1

The Test Device command initiates a more extensive diagnostics routine than
that performed continuously by the transmitter. The Test Device menu lists
the following options:
•

1 Loop test verifies the output of the transmitter, the integrity of the
loop, and the operations of any recorders or similar devices installed in
the loop. The ability to simulate an alarm is also available. See “Loop
Test” below for more information.

•

2 Self Test initiates a transmitter self test. Error codes are displayed if
there is a problem.

•

3 Master Reset sends out a command that restarts and tests the
transmitter. A master reset is like briefly powering down the transmitter.
Configuration data remains unchanged after a master reset.

•

4 Status lists error codes. ON indicates a problem, and OFF means
there are no problems.

AMS
Right click and select “Diagnostics and Calibration.” Choose “Test” and
select “loop test,” “self test,” or “master reset.” Right-click on device and
choose “status” to view errors.

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Model 3144P
Loop Test
HART Fast Keys

1, 2, 1, 1

The Loop Test command verifies the output of the transmitter, the integrity of
the loop, and the operations of any recorders or similar devices installed in the
loop. To initiate a loop test, perform the following procedure:
1. Connect an external ampere meter to the transmitter. To do so, shunt
the power to the transmitter through the meter at some point in the loop.
2. From the HOME screen, select 1 Device Setup, 2 Diag/Serv, 1 Test
Device, 1 Loop Test before performing a loop test. Select OK after you
set the control loop to manual. The communicator displays the loop test
menu.
3. Select a discreet milliampere level for the transmitter to output. At the
CHOOSE ANALOG OUTPUT prompt, select 1 4mA, 2 20mA, or select
4 Other to manually input a value between 4 and 20 milliamperes. Select
Enter. It will indicate the fixed output. Select OK.
4. Check the installed transmitter in the test loop to verify that it reads the
value that it was commanded to output. If the readings do not match,
either the transmitter requires an output trim or the current meter is
malfunctioning.
After completing the test procedure, the display returns to the loop test screen
and allows the user to choose another output value. To end the Loop Test,
Select 5 End and Enter. The Test device screen will appear.
The transmitter can simulate alarm conditions based on the transmitter’s
current hardware and software alarm configurations.
To initiate Simulation Alarm, perform the following procedure:
1. From the Home screen, select 1 Device Setup, 2 Diag/Serv, 1 Test
Device, 1 Loop Test, 3 Simulate Alarm.
2. Based on the choosen alarm conditions, the transmitter will display an
alarm.
3. To return the transmitter to normal conditions, select 5 End.
AMS
Right click and select “Diagnostics and Calibration.” Choose “Test” and
select “Loop Test.” The loop test wizard will walk through the process to fix
the output for either sensor 1 or 2.
The trasmitter must be returned to normal conditions (turn off loop test)
before placing back in process
Right click and select “Diagnostics and Calibration.” Choose “Test” and
select “Loop Test.” The loop test wizard will walk through the process to fix
the analog output. From the loop test wizard screen choose “END.” A
message will apppear indicating that it is OK to return to normal.

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MULTIDROP
COMMUNICATION

Model 3144P
Multidropping refers to the connection of several transmitters to a single
communications transmission line. Communication between the host and the
transmitters takes place digitally with the analog output of the transmitters
deactivated. Many of the Rosemount SMART FAMILY® transmitters can be
multidropped. With the HART communications protocol, up to 15 transmitters
can be connected on a single twisted pair of wires or over leased phone lines.
The application of a multidrop installation requires consideration of the update
rate necessary from each transmitter, the combination of transmitter models,
and the length of the transmission line. Each transmitter is identified by a
unique address (1–15) and responds to the commands defined in the HART
protocol.

Figure 3-4. Typical Multidropped
Network

Power Supply
Impedance
Power Supply

4–20 mA

250 Ω

Handheld Terminal
Computer or DCS

HART Interface

Model 3144P HART
transmitter

Figure 3-4 shows a typical multidrop network. Do not use this figure as an
installation diagram. Contact Emerson Process Management product support
with specific requirements for multidrop applications.
A HART-based communicator can test, configure, and format a multidropped
Model 3144P transmitter the same as in a standard point-to-point installation.
NOTE
The Model 3144P is set to address 0 at the factory, allowing it to operate in
the standard point-to-point manner with a 4–20 mA output signal. To activate
multidrop communication, the transmitter address must be changed to a
number between 1 and 15. This change deactivates the 4–20 mA analog
output, sending it to 4 mA. The failure mode current also is disabled.
AMS
Right click and select “Configuration Properties” from the menu screen.
Select the “HART” tab. From here, assign the polling address.

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USE WITH THE HART
TRI-LOOP

Model 3144P
To prepare the Model 3144P transmitter with dual-sensor option for use with a
Model 333 HART Tri-Loop, you must configure the transmitter to Burst Mode
and set the process variable output order. In Burst Mode, the transmitter
provides digital information for the four process variables to the HART
Tri-Loop. The HART Tri-Loop divides the signal into separate 4–20 mA loops
for up to three of the following choices:
•

primary variable (PV)

•

secondary variable (SV)

•

tertiary variable (TV)

•

quaternary variable (QV)

When using the Model 3144P transmitter with dual-sensor option in
conjunction with the HART Tri-Loop, consider the configuration of the
differential, average, first good temperatures, Sensor Drift Alert, and Hot
Backup features (if applicable).
NOTE
These procedures assume that the sensors and the transmitter are
connected, powered, and functioning properly, and that a Model 275 HART
Communicator is connected to the transmitter control loop and is
communicating successfully. For communicator usage instructions, see
“Commissioning” on page 2-2.
Set the Transmitter to Burst Mode
To set the transmitter to burst mode, follow the steps below.
1. From the Home screen, select 1 Device setup, 3 Configuration, 4 Device
output configuration, 3 HART output, 4 Burst option to prepare to set the
transmitter to burst command 3. The communicator displays the Burst
option screen.
2. Select Process vars/current. The communicator returns to the HART
output screen.
3. Select 3 Burst mode to prepare to enable Burst Mode. The
communicator displays the Burst Mode screen.
4. Select On to enable Burst Mode. The communicator returns to the HART
output screen.
5. Select Send to download the new configuration information to the
transmitter.
Set Process Variable Output Order
To set the process variable output order, follow the steps below.
1. From the Home screen, select 1 Device setup, 3 Configuration,
1 Variable Mapping, 5 Variable Remapping. Select OK to set the control
loop to manual. The communicator displays the Primary Variable screen.
2. Select the item to be set as the primary variable at the Select PV prompt.
3. Repeat step 2 for the SV, TV, and QV. The communicator displays the
Variable mapping screen.
4. Select OK to accept the order to which the variables are mapped, or
Abort to abort the entire procedure.

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NOTE
Take careful note of the process variable output order. You must configure the
HART Tri-Loop to read the variables in the same order.
5. Select OK to return the control loop to automatic control.
AMS
Right click and select “Configuration” from the menu screen. Select “Set
Variable Mapping” . The “Set Variable Mapping wizard” will go through the
mapping procedure.
Special Considerations
To initiate operation between a Model 3144P transmitter with dual-sensor
option and the HART Tri-Loop, consider the configuration of both the
differential, average, first good temperatures, Sensor Drift Alert, and Hot
Backup features (if applicable).
Differential Temperature Measurement
To enable the differential temperature measurement feature of a
dual-sensor Model 3144P operating in conjunction with the HART
Tri-Loop, adjust the range end points of the corresponding channel on the
HART Tri-Loop to include zero. For example, if the secondary variable of
the transmitter is to report the differential temperature, configure the
transmitter accordingly (see “Set Process Variable Output Order” on
page 3-24) and adjust the corresponding channel of the HART Tri-Loop so
one range end point is negative and the other is positive.
Hot Backup
To enable the Hot Backup feature of a Model 3144P transmitter with
dual-sensor option operating in conjunction with the HART Tri-Loop,
ensure that the output units of the sensors are the same as the units of the
HART Tri-Loop. Use any combination of RTDs or thermocouples as long
as the units of both match the units of the HART Tri-Loop.
Using the Tri-Loop to Detect Sensor Drift Alert
The dual-sensor Model 3144P transmitter sets a failure flag (via HART)
whenever a sensor failure occurs. If an analog warning is required, the HART
Tri-Loop can be configured to produce an analog signal that can be
interpreted by the control system as a sensor failure.
Use these steps to set up the HART Tri-Loop to transmit sensor failure alerts.
1. Configure the dual-sensor Model 3144P variable map as shown .
Variable

Mapping

PV
SV
TV
QV

Sensor 1 or Sensor Average
Sensor 2
Differential Temperature
As Desired

2. Configure Channel 1 of the HART Tri-Loop as TV (differential
temperature). If either sensor should fail, the differential temperature
output will be +9999 or –9999 (high or low saturation), depending on the
position of the Failure Mode Switch (see “Failure Mode and Security
Switch Locations” on page 2-5).

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3. Select temperature units for Channel 1 that match the differential
temperature units of the transmitter.
4. Specify a range for the TV such as –100 to 100 °C. If the range is large,
then a sensor drift of a few degrees will represent only a small percent of
range. If Sensor 1 or Sensor 2 fails, the TV will be +9999 (high
saturation) or –9999 (low saturation). In this example, zero is the
midpoint of the TV range. If a ∆T of zero is set as the lower range limit
(4 mA), then the output could saturate low if the reading from Sensor 2
exceeds the reading from Sensor 1. By placing zero in the middle of the
range, the output will normally stay near 12 mA, and the problem will be
avoided.
5. Configure the DCS so that TV < –100 °C or TV > 100 °C indicates a
sensor failure and, for example, TV ≤–3 °C or TV ≥ 3 °C indicates a drift
alert. See Figure 3-5.

DIFFERENTIAL
TEMPERATURE

Figure 3-5. Tracking Sensor Drift
and Sensor Failure with
Differential Temperature

100 °C

Sensor Failure
(Failure Mode Switch HI)
Sensor Drift

3 °C
0 °C
–3 °C
Sensor Drift
–100 °C

Sensor Failure
(Failure Mode Switch LO)

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Section 4

Model 3144P

Operation and Maintenance
Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 4-1
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 4-2
Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 4-9
Assembling the Electronics Housing . . . . . . . . . . . . . . . . page 4-13
Model 275 HART Communicator . . . . . . . . . . . . . . . . . . . . page 4-17
AMS Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 4-20
AMS Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 4-20

SAFETY MESSAGES

Instructions and procedures in this section may require special precautions to
ensure the safety of the personnel performing the operations. Information that
raises potential safety issues is indicated by a warning symbol ( ). Please
refer to the following safety messages before performing an operation
preceded by this symbol.

Warning

Explosions may result in death or serious injury.
•

Do not remove the instrument cover in explosive atmospheres when the circuit is
live.

•

Before connecting a HART communicator in an explosive atmosphere, make sure
the instruments in the loop are installed in accordance with intrinsically safe or
non-incendive field wiring practices.

•

Both transmitter covers must be fully engaged to meet explosion-proof
requirements.

Electrical shock could cause death or serious injury. If the sensor is installed in a
high-voltage environment and a fault or installation error occurs, high voltage may be
present on transmitter leads and terminals.
•

Use extreme caution when making contact with the leads and terminals.

Failure to follow these installation guidelines could result in death or serious injury:
•

Make sure only qualified personnel perform the installation.

Process leaks could result in death or serious injury:

www.rosemount.com

•

Install and tighten thermowells or sensors before applying pressure, or process
leakage may result.

•

Do not remove the thermowell while in operation. Removing while in operation may
cause process fluid leaks.

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April 2003

Model 3144P
CALIBRATION

Calibrating the transmitter increases the precision of your measurement
system. The user may use one or more of a number of trim functions when
calibrating. To understand the trim functions, it is necessary to understand
that smart transmitters operate differently from analog transmitters. An
important difference is that smart transmitters are factory-characterized; they
are shipped with a standard sensor curve stored in the transmitter firmware.
In operation, the transmitter uses this information to produce a process
variable output, dependent on the sensor input. The trim functions allow the
user to make adjustments to the factory-stored characterization curve by
digitally altering the transmitter’s interpretation of the sensor input.
Calibration of the Model 3144P may include the following procedures:

Trim the Transmitter

•

Sensor Input Trim: digitally alter the transmitter’s interpretation of the
input signal

•

Transmitter Sensor Matching: generates a special custom curve to
match that specific sensor curve, as derived from the Callendar-Van
Dusen constants

•

Output Trim: calibrates the transmitter to a 4–20 mA reference scale

•

Scaled Output Trim: calibrates the transmitter to a user-selectable
reference scale.

The trim functions should not be confused with the rerange functions.
Although the rerange command matches a sensor input to a 4–20 mA
output—as in conventional calibration—it does not affect the transmitter’s
interpretation of the input.
One or more of the trim functions may be used when calibrating. The trim
functions are as follows
•

Sensor Input Trim

•

Transmitter Sensor Matching

•

Output Trim

•

Output Scaled Trim

Sensor Input Trim
HART Fast Keys

1, 2, 2, 1, 1

The Sensor Trim command allows the user to digitally alter the transmitter’s
interpretation of the input signal as shown in Figure 4-1 on page 4-3. The
sensor trim command trims, in engineering (°F, °C, °R, K) or raw (Ω, mV)
units, the combined sensor and transmitter system to a site standard using a
known temperature source. Sensor trim is suitable for validation procedures
or for applications that require profiling the sensor and transmitter together.
Perform a sensor trim if the transmitters digital value for the primary variable
does not match the plant’s standard calibration equipment. The sensor trim
function calibrates the sensor to the transmitter in temperature units or raw
units. Unless the site-standard input source is NIST-traceable, the trim
functions will not maintain the NIST-traceability of your system

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.
Application: Linear Offset
Solution: Single-Point Trim
Method:
1. Connect sensor to transmitter. Place
sensor in bath between range points.
2. Enter known bath temperature using
the Model 275 HART Communicator.

Application: Linear Offset and Slope Correction
Solution: Two-Point Trim
Method:
1. Connect sensor to transmitter. Place
sensor in bath at low range point.
2. Enter known bath temperature using the
Model 275 HART Communicator.
3. Repeat at high range point.
Two-Point Trim
Resistance (ohms)

One-Point Trim
Resistance (ohms)

Figure 4-1. Trim

Model 3144P

Temperature

Temperature

Transmitter System Curve
Site-Standard Curve

To perform a sensor trim, use the following procedure:
Single Sensor Trim
1. Connect the sensor or calibrator device to the transmitter.
2. Connect the communicator to the transmitter loop.
3. From the Home screen, select 1 Device Setup, 2 Diag/Service,
2 Calibration, 1 Sensor Trim, 1 Sensor Inp Trim to prepare to trim the
sensor. Select 1 Sensor 1.
4. Select Sensor 1.
NOTE
A warning will appear reminding the user to Set the Control Loop to Manual”
(see “Setting the Loop to Manual” on page 2-2.)
5. The communicator will ask “Are you using an active calibrator?”
a. Select “No” if a sensor is connected to the transmitter
b. Select “Yes” if using a calibration device. By selecting yes, the
transmitter will be put into active calibration mode (see “Active
Calibrator and EMF Compensation” on page 4-5). This is critical if
the calibrator requires constant sensor current for calibration. If
using a calibration device that can accept pulsed current, select “No.
6. Select the appropriate sensor trim units at the ENTER SNSR 1 TRIM
UNITS prompt.
7. Select 1 Lower Only, 2 Upper Only or 3 Lower and Upper at the SELECT
SENSOR TRIM POINTS prompt.
8. Adjust the calibration device to the desired trim value (must be within the
selected sensor limits). If trimming a combined sensor and transmitter
system, expose the sensor to a known temperature and allow the
temperature reading to stabilize. Use a bath, furnace or isothermal block,
measured with a site-standard thermometer, as the known temperature
source.
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Model 3144P
9. Select OK once the temperature stabilizes.
10. Enter the lower or upper trim point, depending on your selection in
Step 7.
The trim functions should not be confused with the rerange functions.
Although the rerange command matches a sensor input to a 4–20 mA
output—as in conventional calibration—it does not affect the transmitter’s
interpretation of the input.
Dual Sensor Trim
1. Connect the sensor or calibrator device to the transmitter.
a. When using sensors, connect the two sensors or a dual element
sensor
b. When using a calibrator, connect the device to both sensor inputs.
2. Connect the communicator to the transmitter loop.
3. From the Home screen, select 1 Device Setup, 2 Diag/Service,
2 Calibration, 1 Sensor Trim, 1 Sensor Inp Trim to prepare to trim the
sensor. Select 1 Sensor 1.
4. The Communicator will prompt the user to select either Sensor 1 or 2.
The sensors can be trimmed in either order, but it is recommended to
trim Sensor 1 first.
NOTE
A warning will appear reminding the user to Set the Control Loop to Manual”
(see “Setting the Loop to Manual” on page 2-2.)
5. The communicator will ask “Are you using an active calibrator?”
a. Select “No” if a sensor is connected to the transmitter
b. Select “Yes” if using a calibration device. By selecting yes, the
transmitter will be put into active calibration mode (see “Active
Calibrator and EMF Compensation” on page 4-5). This is critical if
the calibrator requires constant sensor current for calibration. If
using a calibration device that can accept pulsed current, select “No.
6. Select the appropriate sensor trim units at the ENTER SNSR 1 TRIM
UNITS prompt.
7. Select 1 Lower Only, 2 Upper Only or 3 Lower and Upper at the SELECT
SENSOR TRIM POINTS prompt.
8. Adjust the calibration device to the desired trim value (must be within the
selected sensor limits). If trimming a combined sensor and transmitter
system, expose the sensor to a known temperature and allow the
temperature reading to stabilize. Use a bath, furnace or isothermal block,
measured with a site-standard thermometer, as the known temperature
source.
9. Select OK once the temperature stabilizes.
10. Enter the lower or upper trim point, depending on your selection in
Step 7.
To trim the second sensor, repeat the same procedure only in Step 4, select
the sensor not yet calibrated (usually Sensor 2)

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Model 3144P
AMS
For AMS, configure each sensor as indicated above.
Right click on the device and select “Diagnostics and Calibration” from the
menu. Select “Calibrate,” then “Sensor Trim,” then “Sensor Input Trim.”
The wizard will continue through the process.
The transmitter may be restored to the factory default by selecting:
“Diagnostics and Calibration,” “Sensor Trim,” “Revert to Factory Trim.”
The wizard will recall the factory trim for a given sensor
Apply changes made (see “AMS” on page 3-5).
Active Calibrator and EMF Compensation
HART Fast Keys

1, 2, 2, 1, 3

The transmitter operates with a pulsating sensor current to allow EMF
compensation and detection of open sensor conditions. Because some
calibration equipment requires a steady sensor current to function
properly, the “Active Calibrator Mode” feature should be used when an
Active Calibrator, which requires a constant sensor current, is connected.
Enabling this mode will temporarily set the transmitter to provide steady
sensor current unless two sensor inputs are configured. Disable this mode
before putting the transmitter back into the process. Disabling this mode
will set the transmitter back to pulsating current. “Active Calibrator Mode”
is volatile and will automatically be disabled when a Master Reset is
performed (via HART) or when power is cycled.
EMF compensation allows the transmitter to provide sensor
measurements that are not affected by unwanted voltages, which are
typically due to thermal EMFs in the equipment connected to the
transmitter or by some types of calibration equipment. If this equipment
also requires steady sensor current, the transmitter must be set to “Active
Calibrator Mode.” However, the steady current does not allow the
transmitter to perform EMF compensation. As a result, a difference in
readings between the Active Calibrator and actual sensor may exist.
If a reading difference is experienced and the difference is greater than the
plant’s accuracy specification allows, perform a sensor trim with “Active
Calibrator Mode” disabled. In this case, an active calibrator capable of
tolerating pulsating sensor current must be used or the actual sensors
must be connected to the transmitter. When the Model 275 HART
Communicator or AMS asks if an Active Calibrator is being used when the
sensor trim routine is entered, select No. This will leave the “Active
Calibrator Mode” disabled.
Contact a Emerson Process Management representative for more
information.
Transmitter-Sensor Matching
HART Fast Keys

1, 3, 2, 1, 1

The Model 3144P accepts Callendar-Van Dusen constants from a calibrated
RTD schedule and generates a special custom curve to match that specific
sensor Resistance vs. Temperature performance. Matching the specific
sensor curve with the transmitter significantly enhances the temperature
measurement accuracy. See the comparison below:

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Model 3144P
System Accuracy Comparison at 150 °C Using a PT 100 (α=0.00385)
RTD with a Span of 0 to 200 °C
Standard RTD
Model 3144P
Standard RTD
Total System(1)

±0.10 °C
±1.05 °C
±1.05 °C

Matched RTD
Model 3144P
Matched RTD
Total System(1)

±0.10 °C
±0.18 °C
±0.21 °C

(1) Calculated using root-summed-squared (RSS) statistical method

TotalSystemAccuracy =

( TransmitterAccuracy ) 2 + ( SensorAccuracy ) 2

The following input constants, included with specially-ordered Rosemount
temperature sensors, are required:
R0 = Resistance at Ice Point
Alpha = Sensor Specific Constant
Beta = Sensor Specific Constant
Delta = Sensor Specific Constant
Other sensor may have “A,B, or C” values for constants.
To input Callendar-Van Dusen constants, perform the following procedure:
1. From the HOME screen, select 1 Device Setup, 3 Configuration, 2
Sensor Config, 1 Change Type/Conn., 1 Sensor 1. Select OK after you
set the control loop to manual.
2. Select Cal VanDusen at the ENTER SENSOR TYPE prompt.
3. Select the appropriate number of wires at the ENTER SENSOR
CONNECTION prompt.
4. Enter the Ro, Alpha, Beta, and Delta values from the stainless steel tag
attached to the special-order sensor when prompted.
5. Select OK after you return the control loop to automatic control.
To disable the transmitter-sensor matching feature from the HOME screen
select 1 Device Setup, 3 Configuration, 2 Sensor Config, 1 Change
Type/Conn. Choose the appropriate sensor type from the ENTER
SENSOR TYPE prompt.
When using two sensors, repeat Steps 1 – 5 for the second sensor. In
Step 1, select Sensor 2 instead of Sensor 1.
NOTE
When you disable transmitter-sensor matching, the transmitter reverts to
factory trim input. Make certain the transmitter engineering units default
correctly before placing the transmitter into service.
Callendar Van-Dusen constants can be viewed anytime by
making the following selections:
From the Home screen select 1 Device Setup, 3 Configuration, 2 Sensor
Config, 2 Show Type/Conn.
AMS
Right click on the device and select “Configuration” from the menu. Select
the “Sensor connections.” Change the Type and Connection.
The wizard will go through the required changes. In the field, select “Cal
VanDusen to enter the sensor type.

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Model 3144P
D/A Output Trim or Scaled Output Trim
Perform an D/A output trim (scaled output trim) if the digital value for the
primary variable matches the plant standard but the transmitter’s analog
output does not match the digital value on the output device, such as the
ampmeter. The output trim function calibrates the transmitter analog output to
a 4–20 mA reference scale; the scaled output trim function calibrates to a
user-selectable reference scale. To determine the need for an output trim or a
scaled output trim, perform a loop test (see “Loop Test” on page 3-22).

Figure 4-2. Dynamics of Smart
Temperature Measurement

Transmitter Electronics Module
Analog-to-Digital
Microprocessor
Signal Conversion
Sensor and Ohm/mV
Trim adjust the signal here

Analog
Input

HART
Communicator

Digital-to-Analog
Signal Conversion
Output and Scaled Output
Trim adjust the signal here

HART
Output

Analog
Output

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Model 3144P
Output Trim
HART Fast Keys

1, 2, 2, 2

The D/A Trim command allows the user to alter the transmitter’s conversion of
the input signal to a 4–20 mA output (see Figure 4-2 on page 4-7). Calibrate
the analog output signal at regular intervals to maintain measurement
precision. To perform a digital-to-analog trim, perform the following
procedure:
1. From the HOME screen, select 1 Device setup, 2 Diag/Service,
2 Calibration, 2 D/A trim. Set the control loop to manual and select OK.
2. Connect an accurate reference meter to the transmitter at the
CONNECT REFERENCE METER prompt. To do so, shunt the power to
the transmitter through the reference meter at some point in the loop.
Select OK after connecting the reference meter.
3. Select OK at the SETTING FLD DEV OUTPUT TO 4 MA prompt. The
transmitter outputs 4.00 mA.
4. Record the actual value from the reference meter, and enter it at the
ENTER METER VALUE prompt. The communicator prompts the user to
verify if the output value equals the value on the reference meter.
5. If the reference meter value equals the transmitter output value, then
select 1 Yes and go to step 6. If the reference meter value does not equal
the transmitter output value, then select 2 No and go to step 4.
6. Select OK at the SETTING FLD DEV OUTPUT TO 20 MA prompt and
repeat steps 4 and 5 until the reference meter value equals the
transmitter output value.
7. Return the control loop to automatic control and select OK.
AMS
Right click on the device and select “Diagnostics and Calibration” from the
menu. Select the “Calibrate” and choose the “D/A Trim.”
This wizard will go through the required changes.
Scaled Output Trim
HART Fast Keys

1, 2, 2, 3

The Scaled D/A Trim command matches the 4 and 20 mA points to a
user-selectable reference scale other than 4 and 20 mA (2–10 volts, for
example). To perform a scaled D/A trim, connect an accurate reference meter
to the transmitter and trim the output signal to scale as outlined in the ”Output
Trim” procedure.
AMS
Right click on the device and select “Diagnostics and Calibration” from the
menu. Select the “Calibrate” and choose the “Scaled D/A Trim.”
This wizard will go through the required changes.

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Model 3144P

HARDWARE
Diagnostics with HART
Communicator

If a malfunction is suspected despite the absence of a diagnostics message
on the HART communicator display, follow the procedures described in
Table 4-1 to verify that transmitter hardware and process connections are in
good working order. Under each of four major symptoms, specific suggestions
are offered for solving problems. Always deal with the most likely and
easiest-to-check conditions first.

Table 4-1. Troubleshooting.
SYMPTON

POTENTIAL
SOURCE

CORRECTIVE ACTION

Transmitter
Does Not
Communicate
with HART
Communicator

Loop Wiring

• Check the revision level of the transmitter device
descriptors (DDs) stored in your communicator. The
communicator should report Dev v3, DD v2
(improved), or Dev v2, DD v1 (previous). Contact
Emerson Process Management Customer Central
for assistance.
• Check for a minimum of 250 ohms resistance
between the power supply and HART communicator
connection.
• Check for adequate voltage to the transmitter. If a
HART communicator is connected and 250 ohms
resistance is properly in the loop, then the
transmitter requires a minimum of 12.0 V at the
terminals to operate (over entire 3.90 to 20.5 mA
operating range), and 17.5 V minimum to
communicate digitally.
• Check for intermittent shorts, open circuits, and
multiple grounds.

High Output

Sensor Input
Failure or
Connection

• Connect a HART communicator and enter the
transmitter test mode to isolate a sensor failure.
• Check for a sensor open circuit.
• Check if the process variable is out of range.

Loop Wiring

• Check for dirty or defective terminals,
interconnecting pins, or receptacles.

Power Supply

• Check the output voltage of the power supply at the
transmitter terminals. It should be 12.0 to 42.4 V dc
(over entire 3.90 to 20.5 mA operating range).

Electronics Module

• Connect a HART communicator and enter the
transmitter test mode to isolate module failure.
• Connect a HART communicator and check the
sensor limits to ensure calibration adjustments are
within the sensor range.

Loop wiring

• Check for adequate voltage to the transmitter. It
should be 12.0 to 42.4 V dc at the transmitter
terminals (over entire 3.90 to 20.5 mA operating
range).
• Check for intermittent shorts, open circuits, and
multiple grounds.
• Connect a HART communicator and enter the loop
test mode to generate signals of 4 mA, 20 mA, and
user-selected values.

Electronics Module

• Connect a HART communicator and enter the
transmitter test mode to isolate module failure.

Erratic Output

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Model 3144P
SYMPTON
Low Output or
No Output

POTENTIAL
SOURCE
Sensor Element

Loop Wiring

Electronics Module

Diagnostics with AMS

CORRECTIVE ACTION
• Connect a HART communicator and enter the
transmitter test mode to isolate a sensor failure.
• Check if the process variable is out of range.
• Check for adequate voltage to the transmitter. It
should be 12.0 to 42.4 V dc (over entire 3.90 to 20.5
mA operating range).
• Check for shorts and multiple grounds.
• Check for proper polarity at the signal terminal.
• Check the loop impedance.
• Connect a HART communicator and enter the loop
test mode.
• Check wire insulation to detect possible shorts to
ground.
• Connect a HART communicator and check the sensor
limits to ensure calibration adjustments are within the
sensor range.
• Connect a HART communicator and enter the
transmitter test mode to isolate an electronics
module failure.

If a malfunction is suspected despite the absence of a diagnostics message,
follow the procedures described in Table 4-2 to verify that transmitter
hardware and process connections are in good working order. Under each of
four major symptoms, specific suggestions are offered for solving problems.
Always deal with the most likely and easiest-to-check conditions first.

Table 4-2. Troubleshooting.
SYMPTON
Transmitter
Does Not
Communicate
with AMS
Software

POTENTIAL
SOURCE
Loop Wiring

CORRECTIVE ACTION
• Check the revision level of the transmitter device
descriptors (DDs) stored in your software. The
communicator should report Dev v3, DD v2
(improved), or Dev v2, DD v1 (previous). Contact
Emerson Process Management Customer Central
for assistance.
• Check for a minimum of 250 ohms resistance
between the power supply and AMS software.
• Check for adequate voltage to the transmitter. If the
AMS software is connected and 250 ohms
resistance is properly in the loop, then the
transmitter requires a minimum of 12.0 V at the
terminals to operate (over entire 3.90 to 20.5 mA
operating range), and 17.5 V minimum to
communicate digitally.
• Check for intermittent shorts, open circuits, and
multiple grounds.

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Model 3144P
SYMPTON
High Output

Erratic Output

Low Output or
No Output

POTENTIAL
SOURCE

CORRECTIVE ACTION

Sensor Input
Failure or
Connection

• Using AMS, set the transmitter test mode to isolate a
sensor failure.
• Check for a sensor open circuit.
• Check if the process variable is out of range.

Loop Wiring

• Check for dirty or defective terminals,
interconnecting pins, or receptacles.

Power Supply

• Check the output voltage of the power supply at the
transmitter terminals. It should be 12.0 to 42.4 V dc
(over entire 3.90 to 20.5 mA operating range).

Electronics Module

• Using AMS, set the transmitter test mode to isolate
module failure.
• Using AMS, check the sensor limits to ensure
calibration adjustments are within the sensor range.

Loop wiring

• Check for adequate voltage to the transmitter. It
should be 12.0 to 42.4 V dc at the transmitter
terminals (over entire 3.90 to 20.5 mA operating
range).
• Check for intermittent shorts, open circuits, and
multiple grounds.
• Using AMS, set the loop test mode to generate
signals of 4 mA, 20 mA, and user-selected values.

Electronics Module

• Using AMS, set the transmitter test mode to isolate
module failure.

Sensor Element

Loop Wiring

Electronics Module

• Using AMS, set the transmitter test mode to isolate a
sensor failure.
• Check if the process variable is out of range.
• Check for adequate voltage to the transmitter. It
should be 12.0 to 42.4 V dc (over entire 3.90 to 20.5
mA operating range).
• Check for shorts and multiple grounds.
• Check for proper polarity at the signal terminal.
• Check the loop impedance.
• Set the loop test mode.
• Check wire insulation to detect possible shorts to
ground.
• Using AMS, check the sensor limits to ensure
calibration adjustments are within the sensor range.
• Using AMS, set the transmitter test mode to isolate an
electronics module failure.

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Maintenance

Model 3144P
The Model 3144P transmitter has no moving parts and require a minimum
amount of scheduled maintenance. The transmitter features a modular design
for easy maintenance. If a malfunction is suspected, check for an external
cause before performing the diagnostics as discussed in this section.
Test Terminal
The test terminal, marked as TEST or (“T”) on the terminal block, and the
negative (-) terminal accept MINIGRABBER™, or alligator clips, and facilitate
in-process checks (see Figure 2-8 on page 2-10). The test and the negative
terminals are connected across a diode through which the loop signal current
passes. The current measuring equipment shunts the diode when connected
across the test (T) and negative (-) terminals; so as long as the voltage across
the terminals is kept below the diode threshold voltage, no current passes
through the diode. To ensure that there is no leakage current through the
diode while making a test reading, or while an indicating meter is connected,
the resistance of the test connection or meter should not exceed 10 ohms. A
resistance value of 30 ohms will cause an error of approximately 1.0 percent
of reading.
Sensor Checkout
If the sensor is installed in a high-voltage environment and a fault condition or
installation error occurs, the sensor leads and transmitter terminals could
carry lethal voltages. Use extreme caution when making contact with the
leads and terminals.
To determine whether the sensor is at fault, either replace it with another
sensor or connect a test sensor locally at the transmitter to test remote sensor
wiring. Transmitters with Option Code C7 (Trim to Special Sensor), are
matched to a specific sensor. Select any standard, off-the-shelf sensor for use
with the transmitter, or consult the factory for a replacement special
sensor/transmitter combination.
Disassembling the Electronics Housing
The transmitter is designed with a dual-compartment housing; one
compartment contains the electronics module, and the other compartment
contains all wiring terminals and the communication receptacles.
Removing the Electronics Module
The Model 3144P electronics module is located in the compartment opposite
the wiring terminals.
Use the following procedure to remove the electronics module.
NOTE
The electronics are sealed in a moisture-proof plastic enclosure referred to as
the electronics module. The module is a non-repairable unit; The entire unit
must be replaced if a malfunction occurs.

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Model 3144P
1. Disconnect the power to the transmitter.
2. Remove the cover from the electronics side of the transmitter housing
(see “ Transmitter Exploded View” on page A-7). Do not remove the
covers in explosive atmospheres when the circuit is live. Remove the
LCD meter, if applicable.
3. Loosen the two screws that anchor the electronics module assembly to
the transmitter housing.
4. Firmly grasp the screws and assembly and pull it straight out of the
housing, taking care not to damage the interconnecting pins.
NOTE
Note the transmitter’s security switch position (ON or OFF) and the failure
mode switch position (LO or HI). If you are replacing the electronics module
with a new one, make sure the security and alarm switch is set in the same
position.
Transmitter Security and Failure Mode Switches
The transmitter security and failure mode switches are located on the front of
the electronics module, as shown in “Switch Location” on page A-7. See
“Mounting and Installation” on page 2-6 for more information.

ASSEMBLING THE
ELECTRONICS
HOUSING
Replacing the
Electronics Module

Use the following procedure to reassemble the electronics housing for the
Model 3144P transmitter:
1. Examine the electronics module to ensure that the failure mode and
transmitter security switches are in the desired positions.
2. Carefully insert the electronics module to mate the interconnecting pins
with the necessary receptacles on the electronics board.
3. Tighten the two mounting screws. Replace the LCD meter, if applicable.
4. Replace the cover. Tighten 1/6 of a revolution after the cover begins to
compress the O-ring. Both transmitter covers must be fully engaged to
meet explosion proof requirements.

LCD Meter Diagnostic
Messages

The LCD meter displays abbreviated diagnostic messages for troubleshooting
the transmitter. To accommodate two-word messages, the display alternates
between the first and second word. Some diagnostic messages have a higher
priority than others, so messages appear according to their priority, with
normal operating messages appearing last. The meter displays messages
simultaneously on the Process Variable and Process Variable Unit lines as
shown in “LCD Meter Faceplate” on page A-7. Messages on the Process
Variable line refer to general device conditions, while messages on the
Process Variable Unit line refer to specific causes for these conditions. A
description of each diagnostic message follows.

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Model 3144P
[BLANK]
If the meter does not appear to function, make sure the transmitter is
configured for the meter option you desire. The meter will not function if the
LCD Meter option is set to Not Used.
FAIL -or- HDWR FAIL
This message indicates one of several conditions including:
•

The transmitter has experienced an electronics module failure.

•

The transmitter self-test has failed.

If diagnostics indicate a failure of the electronics module, replace the
electronics module with a new one. Contact the nearest Emerson Process
Management Field Service Center if necessary.
SNSR 1 FAIL -or- SNSR 2 FAIL
The transmitter has detected an open or shorted sensor condition. The
sensor(s) might be disconnected, connected improperly, or malfunctioning.
Check the sensor connections and sensor continuity.
SNSR 1 SAT -or- SNSR 2 SAT
The temperature sensed by the transmitter exceeds the sensor limits for this
particular sensor type.
HOUSG SAT
The transmitter operating temperature limits (–40 to 185 °F (40 to
85 °C)) have been exceeded.
LOOP FIXED
During a loop test or a 4–20 mA output trim, the analog output defaults to a
fixed value. The Process Variable line of the display alternates between the
amount of current selected in milliamperes and “WARN.” The Process
Variable Unit line toggles between “LOOP,” “FIXED,” and the amount of
current selected in milliamperes.
OFLOW
The location of the decimal point, as configured in the meter setup, is not
compatible with the value to be displayed by the meter. For example, if the
meter is measuring a process temperature greater than 9.9999 degrees, and
the meter decimal point is set to 4 digit precision, the meter will display an
“OFLOW” message because it is only capable of displaying a maximum value
of 9.9999 when set to 4 digit precision.
HOT BU
Hot Backup is enabled and Sensor 1 has failed. This message is displayed on
the Process Variable line and is always accompanied by a more descriptive
message on the Process Variable Unit line. In the case of a Sensor 1 failure
with Hot Backup enabled, for example, the Process Variable line displays
“HOT BU,” and the Process Variable Unit line alternates between “SNSR 1”
and “FAIL.”

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3144-3144_03A, 03B

Figure 4-3. Hot Backup Display.

WARN DRIFT ALERT
Drift Alert warning is enabled and the difference between Sensor 1 and
Sensor 2 has exceeded the user-specified limit. One of the sensors may be
malfunctioning. The Process Variable line displays “WARN” and the Process
Variable Unit line alternates between “DRIFT” and “ALERT.”

3144-3144_03C, 03D

Figure 4-4. Sensor Drift Alert
Display.

ALARM DRIFT ALERT
The analog output is in alarm. Drift Alert alarm is enabled and the difference
between Sensor 1 and Sensor 2 has exceeded the user-specified limit. The
transmitter is still operating, but one of the sensors may be malfunctioning.
The Process Variable line displays “ALARM” and the Process Variable Unit
line alternates between “DRIFT” and “ALERT.”
ALARM
The digital and analog outputs are in alarm. Possible causes of this condition
include, but are not limited to, an electronics failure or an open sensor. This
message is displayed on the Process Variable line and is always
accompanied by a more descriptive message on the Process Variable Unit
line. In the case of a Sensor 1 failure, for example, the Process Variable line
displays “ALARM,” and the Process Variable Unit line alternates between
“SNSR 1” and “FAIL.”
WARN
The transmitter is still operating, but something is not correct. Possible causes
of this condition include, but are not limited to, an out-of-range sensor, a fixed
loop, or an open sensor condition. In the case of a Sensor 2 failure with Hot
Backup enabled, the Process Variable line displays “WARN,” and the Process
Variable Unit line alternates between “SNSR 2” and “RANGE.”

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AMS Screens Diagnostic
Messages

Model 3144P
AMS provides advanced diagnostic messages, as well as help screens for the
messages. Using the help screens can provide quick reference to remedying
the situation. The trouble shooting section for this manual can also be pasted
in AMS to assist in quick and accurate troubleshooting reference.
Alarms and Alerts
Right click on the device and select “Process Variables”. This screen shows
the sensor reading and status of the sensor and transmitters. If no alarms or
alerts are activated, the screen will look like this:

Sensor Failure
When the transmitter has detected an open or shorted sensor condition, the
sensor(s) might be disconnected, connected improperly, or malfunctioning.
Check the Sensor connections and continuity. Replace the sensor if
necessary.
By right-clicking on the device and selecting “status,: the status screen
appears. This screen shows an overview of the transmitter health. Red bars
indicate system changes or that the transmitter is not working properly and
should be investigated.

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Model 3144P
Hot BackUp®
Hot Backup is enabled and Sensor 1 or Sensor 2 has failed. The following is
displayed on the Process Variable Screen. The suspect sensor should be
investigated as soon as possible, and replaced as necessary.

Sensor Drift Alert
When the Drift Alert warning or alarm is enable, they indicate that the
differences between Sensor 1 and Sensor 2 has exceeded the user-specified
limit. One of the sensors may be malfunctioning. The sensors should both be
investigated at the earliest opportunity.

MODEL 275 HART
COMMUNICATOR
Diagnostic Messages

The following is a list of messages used by the Model 275 HART
Communicator and their corresponding descriptions.
Variable parameters within the text of a message are indicated with .
Reference to the name of another message is identified by [another
message].

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Model 3144P
Message

Description

Add item for ALL device
types or only for this ONE
device type
Command not implemented
Communication error

Asks the user whether the hot key item being added should be
added for all device types or only for the type of device that is
connected.
The connected device does not support this function.
Either a device sends back a response indicating that the
message it received was unintelligible, or the HART
Communicator cannot understand the response from the device.
The configuration stored in memory is incompatible with the
device to which a transfer has been requested.

Configuration memory not
compatible with connected
device
Device busy
Device disconnected
Device write protected
Device write protected. Do
you still want to shut off?
Display value of variable on
hot key menu?
Download data from
configuration memory
to device
Exceed field width
Exceed precision
Ignore next 50 occurrences
of status?
Illegal character
Illegal date
Illegal month
Illegal year
Incomplete exponent
Incomplete field
Looking for a device
Mark as read
only variable on
hotkey menu?
No device configuration in
configuration memory
No device found
No hotkey menu available
for this device.
No offline
devices available
No simulation
devices available
No UPLOAD_VARIABLES
in ddl for this device
No valid items
OFF KEY DISABLED

The connected device is busy performing another task.
Device fails to respond to a command.
Device is in write-protect mode. Data can not be written.
Device is in write-protect mode. Press YES to turn the HART
Communicator off and lose the unsent data.
Asks whether the value of the variable should be displayed
adjacent to its label on the hot key menu if the item being
added to the hot key menu is a variable.
Prompts user to press SEND softkey to initiate a memory to
device transfer.
Indicates that the field width for the current arithmetic variable
exceeds the device-specified description edit format.
Indicates that the precision for the current arithmetic variable
exceeds the device-specified description edit format.
Asked after displaying device status. Softkey answer determines
whether next 50 occurrences of device status will be ignored
or displayed.
An invalid character for the variable type was entered.
The day portion of the date is invalid.
The month portion of the date is invalid.
The year portion of the date is invalid.
The exponent of a scientific notation floating point variable
is incomplete.
The value entered is not complete for the variable type.
Polling for multidropped devices at addresses 1–15.
Asks whether the user should be allowed to edit the variable from
the hotkey menu if the item being added to the hotkey menu is
a variable.
There is no configuration saved in memory available to
re-configure off-line or transfer to a device.
Poll of address zero fails to find a device, or poll of all addresses
fails to find a device if auto-poll is enabled.
There is no menu named “hotkey” defined in the device
description for this device.
There are no device descriptions available to be used to
configure a device offline.
There are no device descriptions available to simulate a device.
There is no menu named “upload_variables” defined in the
device description for this device. This menu is required for
offline configuration.
The selected menu or edit display contains no valid items.
Appears when the user attempts to turn the HART
Communicator off before sending modified data or before
completing a method.

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Model 3144P
Message

Description

Online device disconnected
with unsent data. RETRY or
OK to lose data
Out of memory for hotkey
configuration. Delete
unnecessary items.
Overwrite existing
configuration memory

There is unsent data for a previously connected device. Press
RETRY to send data, or press OK to disconnect and lose
unsent data.
There is no more memory available to store additional hotkey
items. Unnecessary items should be deleted to make space
available.
Requests permission to overwrite existing configuration either by
a device-to-memory transfer or by an offline configuration. User
answers using the softkeys.
Press the OK softkey. This message usually appears after an
error message from the application or as a result of HART
communications.
The edited value that was sent to a device was not properly
implemented. Restoring the device value returns the variable to
its original value.
Prompts user to press SAVE softkey to initiate a
device-to-memory transfer.
Data is being transferred from a device to configuration memory.

Press OK

Restore device value?

Save data from device to
configuration memory
Saving data to
configuration memory
Sending data to device
There are write only
variables which have
not been edited.
Please edit them
There is unsent data. Send
it before shutting off?
Too few data
bytes received
Transmitter fault
Units for 
has changed. Unit must be
sent before editing, or
invalid data will be sent.
Unsent data to online
device. SEND or
LOSE data
Use up/down arrows to
change contrast. Press
DONE when done.
Value out of range

 occurred
reading/writing


 has an
unknown value. Unit must
be sent before editing, or
invalid data will be sent.

Data is being transferred from configuration memory to a device.
There are write-only variables that have not been set by the user.
These variables should be set or invalid values may be sent to
the device.
Press YES to send unsent data and turn the HART
Communicator off. Press NO to turn the HART Communicator off
and lose the unsent data.
Command returns fewer data bytes than expected as determined
by the device description.
Device returns a command response indicating a fault with the
connected device.
The engineering units for this variable have been edited. Send
engineering units to the device before editing this variable.

There is unsent data for a previously connected device which
must be sent or thrown away before connecting to another
device.
Gives direction to change the contrast of the HART
Communicator display.
The user-entered value is either not within the range for the given
type and size of variable or not within the min/max specified by
the device.
Either a read/write command indicates too few data bytes
received, transmitter fault, invalid response code, invalid
response command, invalid reply data field, or failed pre- or
post-read method; or a response code of any class other than
SUCCESS is returned reading a particular variable.
A variable related to this variable has been edited. Send related
variable to the device before editing this variable.

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AMS SOFTWARE
Diagnostic Messages

The following is a list of messages used by AMS software. These are
communicated through pop-up menus.
Message

Description

Command not implemented
Communication error

The connected device does not support this function.
Either a device sends back a response indicating that the
message it received was unintelligible, or the HART
Communicator cannot understand the response from the device.
The connected device is busy performing another task.
Device fails to respond to a command.
Device is in write-protect mode. Data can not be written.
An invalid character for the variable type was entered.
The day portion of the date is invalid.
The month portion of the date is invalid.
The year portion of the date is invalid.
The exponent of a scientific notation floating point variable
is incomplete.
The value entered is not complete for the variable type.
Data is being transferred from configuration memory to a device.
There are write-only variables that have not been set by the user.
These variables should be set or invalid values may be sent to
the device.

Device busy
Device disappears from list
Device write protected
Illegal character
Illegal date
Illegal month
Illegal year
Incomplete exponent
Incomplete field
Sending data to device
There are write only
variables which have
not been edited.
Please edit them
There is unsent data. Send
it before shutting off?
Too few data
bytes received
Transmitter fault
Units for 
has changed. Unit must be
sent before editing, or
invalid data will be sent.
Unsent data to online
device. SEND or
LOSE data
Value out of range

 occurred
reading/writing


 has an
unknown value. Unit must
be sent before editing, or
invalid data will be sent.

Press YES to send unsent data and turn the HART
Communicator off. Press NO to turn the HART Communicator off
and lose the unsent data.
Command returns fewer data bytes than expected as determined
by the device description.
Device returns a command response indicating a fault with the
connected device.
The engineering units for this variable have been edited. Send
engineering units to the device before editing this variable.

There is unsent data for a previously connected device which
must be sent or thrown away before connecting to another
device.
The user-entered value is either not within the range for the given
type and size of variable or not within the min/max specified by
the device.
Either a read/write command indicates too few data bytes
received, transmitter fault, invalid response code, invalid
response command, invalid reply data field, or failed pre- or
post-read method; or a response code of any class other than
SUCCESS is returned reading a particular variable.
A variable related to this variable has been edited. Send related
variable to the device before editing this variable.

AMS VARIABLES

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Appendix A

Model 3144P

Specifications and
Reference Data
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page A-1
Dimensional Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . page A-7
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page A-9
Tagging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page A-10
External Ground Screw Assembly . . . . . . . . . . . . . . . . . . page A-11
Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page A-11

SPECIFICATIONS
Functional

Inputs
User-selectable. See Accuracy Table for sensor options.
Output
2-wire 4–20 mA, linear with temperature or linear with input. Digital output
signal superimposed on 4–20 mA signal, available for HART communicator or
control system interface.
Load Limitations

Load (Ohms)

Maximum Load = 40.8 X (Supply Voltage - 12.0)
4–20 mA dc

1240
1100
1000
750
500

Operating
Region

250
0
10

20
30
40 42.4
12.0
Supply Voltage (V dc)

NOTE
HART Communication requires a loop resistance between 250 and 1100
ohms. Do not communicate with the transmitter when power is below 12 V dc
at the transmitter terminals.
Power Supply
External power supply required. Transmitters operate on 12.0 to 42.4 V dc
transmitter terminal voltage (with 250 ohm load, 18.1 V dc power supply is
required). Transmitter power terminals rated to 42.4 V dc.

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Model 3144P

Isolation
Input/output isolation tested up to 500 V rms (707 V dc)
Update Time
Approximately 0.5 seconds for a single sensor (1 second for dual sensors.)
Local Indication
Optional five-digit LCD meter includes 0–100% bar graph. Digits are
0.4 inches (8 mm) high. Display options include engineering units (°F, °C, °R,
K, ohms, and millivolts), percent, and milliamperes. The display can also be
set to alternate between engineering units/milliamperes, Sensor 1/Sensor 2,
Sensor 1/Sensor 2/Differential Temperature, and Sensor 1/Sensor2/Average
Temperature. All display options, including the decimal point, may be
reconfigured in the field using a Model 275 HART Communicator or AMS.
Humidity Limits
0–100% relative humidity
Transient Protection (option code T1)
The transient protector helps to prevent damage to the transmitter from
transients induced on the loop wiring by lightning, welding, heavy electrical
equipment, or switch gears. The transient protection electronics are contained
in an add-on assembly that attaches to the standard transmitter terminal
block. Option code G1 external ground lug assembly is included with the
Transient Protector option code T1.The transient protector has been tested
per the following standard:
• ASME B 16.5 (ANSI)/IEEE C62.41-1991 (IEEE 587)/ Location Categories
A2, B3.
6kV/3kA peak (1.2  50 µS Wave 8  20 µS Combination Wave)
6kV/0.5kA peak (100 kHz Ring Wave)
4kV peak EFT (5  50 µS Electrical Fast Transient)
• Loop resistance added by protector: 22 ohms max.
• Nominal clamping voltages: 90 V (common mode), 77 V (normal mode)
Temperature Limits
Description

Operating Limit

Storage Limit

Without LCD Meter

–40 to 185 °F
–40 to 85 °C
–4 to 185 °F
–20 to 85 °C

–60 to 250 °F
–50 to 120 °C
–50 to 185 °F
–45 to 85 °C

With LCD Meter

Turn-on Time
Performance within specifications less than 5.0 seconds after power is
applied to transmitter
Failure Mode
The Model 3144P features software and hardware failure mode detection. An
independent circuit is designed to provide backup alarm output if the
microprocessor hardware or software fails.

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Model 3144P
The alarm levels are user-selectable using the failure mode switch. If failure
occurs, the position of the hardware switch determines the direction in which
the output is driven (HI or LO). The switch feeds into the digital-to-analog
(D/A) converter, which drives the proper alarm output even if the
microprocessor fails. The values at which the transmitter drives its output in
failure mode depends on whether it is configured to standard,
or NAMUR-compliant (NAMUR recommendation NE 43, June 1997)
operation. The values for standard and NAMUR-compliant operation are as
follows:

Table A-1. Operation
Parameters
Linear Output:
Fail High:
Fail Low:

Standard (1)

NAMUR-Compliant(1)

3.9 ≤ I ≤20.5
21.75 ≤I ≤23 (default)
I ≤3.75

3.8 ≤I ≤20.5
21.5 ≤I ≤23 (default)
I ≤3.6

(1) Measured in milliamperes

Custom Alarm and Saturation Levels
Custom factory configurations of alarm and saturation levels are available for
valid values with option code C1. These values can also be configured in the
field using a HART Communicator.

Physical

Conduit Connections
The standard field mount housing has ½–14 NPT conduit entries. Additional
conduit entry type are available, including PG13.5 (PG11), M20 X 1.5 (CM20),
or JIS G ½. When an of these additional entry types are ordered, adapters are
placed in the standard field housing so these alternative conduit types fit
correctly. See Dimensional drawings for increased dimensions.
HART Communicator Connections
HART communicator connections are permanently fixed to power/signal
block.
Materials of Construction
Electronics Housing
• Low-copper aluminum or CF-8M (cast version of 316 Stainless Steel)
Paint
• Polyurethane
Cover O-rings
• Buna-N
Weight
Aluminum(1)

Stainless Steel(1)

3.1 lb (1.4 kg)

7.8 lb (3.5 kg)

(1) Add 0.5 lb (0.2 kg) for meter or 1.0 lb (0.5 kg) for bracket options.

Mounting
Transmitters may be attached directly to the sensor. Optional mounting
brackets B4 and B5 permit remote mounting. See “Optional Transmitter
Mounting Brackets” on page A-8.

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Enclosure Ratings
NEMA 4X, CSA Enclosure Type 4X, IP66, and IP68

Performance

The Model 3144P transmitter maintains a specification conformance of at
least 3 σ.
Stability
• ±0.1% of reading or 0.1 °C, whichever is greater, for 24 months for RTDs
• ±0.1% of reading or 0.1 °C, whichever is greater, for 12 months for
thermocouples
5 Year Stability
• ±0.25% of reading or 0.25 °C, whichever is greater, for 5 years for RTDs
• ±0.5% of reading or 0.5 °C, whichever is greater, for 5 years for
thermocouples.
Vibration Effect
Transmitters tested to the following specifications with no effect on
performance:
Frequency

Acceleration

10–60 Hz
60–2000 Hz

0.21 mm peak displacement
3g

Self Calibration
The analog-to-digital measurement circuitry automatically self-calibrates for
each temperature update by comparing the dynamic measurement to
extremely stable and accurate internal reference elements.
Power Supply Effect
Less than ±0.005% of span per volt
RFI Effect
Worst case RFI effect is equivalent to the transmitter’s nominal accuracy
specification, according to Table on page A-5, when tested in accordance
with IEC 61326, 10 V/m, 80 to 1000 MHz, with unshielded cable.
CE Electromagnetic Compatibility Compliance Testing
The Model 3144P meets all requirements listed under IEC 61326:
Amendment 1, 1998.
Emerson Process Management Conformance to Specifications

For example, the Reference Accuracy distribution for the Model 3144P is shown to the right. Our
Specification Limits are ± 0.10 °C, but, as the shaded area shows, approximately 68% of the units
perform three times better than the limits. Therefore, it is very likely that you will receive a device that
performs much better than our published specifications.
Conversely, a vendor who “grades” product without using Process Control, or who is not committed to ±
3 performance, will ship a higher percentage of units that are barely within advertised specification
limits.

Typical Accuracy

Lower
Specification
Limit
–3σ

–2σ

1σ

2σ

3σ

Note: Accuracy distribution shown is for the Model
3144P, PT 100 RTD sensor, Range 0 to 100 °C.

(1) Sigma (σ) is a statistical symbol to designate the standard deviation from the mean value of a normal distribution.

A-4

–1σ

Upper
Specification
Limit

3144-GRAPH

A Rosemount product not only meets its published specifications, but most likely exceeds them.
Advanced manufacturing techniques and the use of Statistical Process Control provide specification
conformance to at least ± 3(1). Our commitment to continual improvement ensures that product design,
reliability, and performance will improve annually.

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Model 3144P

Accuracy
Table A-2. Model 3144P Input Options and Accuracy
Sensor
Options

Sensor Reference

Input Ranges

2-, 3-, 4-wire RTDs
Pt 100
IEC 751, 1995 (α = 0.00385)
Pt 100
JIS 1604, 1981 (α = 0.003916)
Pt 200
IEC 751, 1995 (α = 0.00385)
PT 500
IEC 751, 1995 (α = 0.00385)
Pt 1000
IEC 751, 1995 (α = 0.00385)
Ni 120
Edison Curve No. 7
Cu 10
Edison Copper Winding No. 15
Thermocouples(4)
Type B(5)
NIST Monograph 175, IEC 584
Type E
NIST Monograph 175, IEC 584
Type J
NIST Monograph 175, IEC 584
Type K(6)
NIST Monograph 175, IEC 584
Type N
NIST Monograph 175, IEC 584
Type R
NIST Monograph 175, IEC 584
Type S
NIST Monograph 175, IEC 584
Type T
NIST Monograph 175, IEC 584
DIN Type L
DIN 43710
DIN Type U
DIN 43710
Type W5Re/
ASTM E 988-96
W26Re
Millivolt Input
2-, 3-, 4-wire Ohm Input

Recommended
Min. Span(1)

Digital
Accuracy(2)

D/A
Accuracy(3)

°C
–200 to 850
–200 to 645
–200 to 850
–200 to 850
–200 to 300
–70 to 300
–50 to 250

°F
–328 to 1562
–328 to 1193
–328 to 1562
–328 to 1562
–328 to 572
–94 to 572
–58 to 482

°C
10
10
10
10
10
10
10

°F
18
18
18
18
18
18
18

°C
± 0.10
± 0.10
± 0.22
± 0.14
± 0.10
± 0.08
±1.00

°F
± 0.18
± 0.18
± 0.40
± 0.25
± 0.18
± 0.14
± 1.80

±0.02% of span
±0.02% of span
±0.02% of span
±0.02% of span
±0.02% of span
±0.02% of span
±0.02% of span

100 to 1820
–50 to 1000
–180 to 760
–180 to 1372
–200 to 1300
0 to 1768
0 to 1768
–200 to 400
–200 to 900
–200 to 600
0 to 2000

212 to 3308
–58 to 1832
–292 to 1400
–292 to 2502
–328 to 2372
32 to 3214
32 to 3214
–328 to 752
–328 to 1652
–328 to 1112
32 to 3632

25
25
25
25
25
25
25
25
25
25
25

45
45
45
45
45
45
45
45
45
45
45

± 0.75
± 0.20
± 0.25
± 0.25
± 0.40
± 0.60
± 0.50
± 0.25
± 0.35
± 0.35
± 0.70

± 1.35
± 0.36
± 0.45
± 0.45
± 0.72
± 1.08
± 0.90
± 0.45
± 0.63
± 0.63
± 1.26

±0.02% of span
±0.02% of span
±0.02% of span
±0.02% of span
±0.02% of span
±0.02% of span
±0.02% of span
±0.02% of span
±0.02% of span
±0.02% of span
±0.02% of span

–10 to 100 mV
0 to 2000 ohms

3 mV
20 ohm

±0.015 mV
±0.35 ohm

±0.02% of span
±0.02% of span

(1) No minimum or maximum span restrictions within the input ranges. Recommended minimum span will hold noise within accuracy specification with
damping at zero seconds.
(2) Digital accuracy: Digital output can be accessed by HART® Communicator.
(3) Total Analog accuracy is the sum of digital and D/A accuracies.
(4) Total digital accuracy for thermocouple measurement: sum of digital accuracy +0.25 °C (0.45 °F) (cold junction accuracy).
(5) Digital accuracy for NIST Type B is ±3.0 °C (±5.4 °F) from 100 to 300 °C (212 to 572 °F.)
(6) Digital accuracy for NIST Type K is ±0.50 °C (±0.9 °F) from –180 to –90 °C (–292 to –130 °F.)

Reference Accuracy Example
When using a Pt 100 (α = 0.00385) sensor input with a 0 to 100 °C span:
Digital Accuracy would be ±0.10 °C, D/A accuracy would be ±0.02% of 100 °C
or ±0.02 °C, Total = ±0.12 °C.
Differential Capability Exists Between Any Two Sensor Types
(dual-sensor option)
For all differential configurations, the minimum and maximum input range is
X to +Y where:
• X = Sensor 1 minimum – Sensor 2 maximum
• Y = Sensor 1 maximum – Sensor 2 minimum.
Digital Accuracy for Differential Configurations (dual-sensor option)
• Sensor types are similar (e.g., both RTDs or both T/Cs): Digital Accuracy =
1.5 times worst case accuracy of either sensor type.
• Sensor types are dissimilar (e.g., one RTD, one T/C): Digital Accuracy =
Sensor 1 Accuracy + Sensor 2 Accuracy.

A-5

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Model 3144P

Ambient Temperature Effect
Transmitters may be installed in locations where the ambient temperature is
between –40 and 85 °C (–40 and 185 °F).
Each transmitter is individually characterized over this ambient temperature
range at the factory in order to maintain excellent accuracy performance.
The factory characterization technique is accomplished through extreme hot
and cold temperature profiling with individual adjustment factors programmed
into each transmitter. Transmitters automatically adjust for component drift
caused by changing environmental conditions.
Table A-3. Ambient
Temperature Effect

Sensor
Options

Digital Accuracy per 1.0 °C
(1.8 °F) Change in Ambient(1)

2-, 3-, or 4- Wire RTDs
Pt 100(2)
0.0015 °C
Pt 100(3)
0.0015 °C
Pt 200
0.0023 °C
Pt 500
0.0015 °C
Pt 1000
0.0015 °C
Ni 120
0.0010 °C
Cu 10
0.015 °C
Thermocouples
Type B
0.014 °C
0.029 °C – 0.0021% of (R – 300)
0.046 °C – 0.0086% of (R – 100)
Type E
0.004 °C + 0.00043% of R
Type J
0.004 °C + 0.00029% of R
0.004 °C + 0.0020% of abs. val. R
Type K
0.005 °C + 0.00054% of R
0.005 °C + 0.0020% of abs. val. R
Type N
0.005 °C + 0.00036% of R
Types R and S 0.015 °C
0.021 °C – 0.0032% of R
Type T
0.005 °C
0.005 °C + 0.00036% of abs. val. R
DIN Type L
0.0054 °C + 0.00029% of R
0.0054 °C + 0.0025% of abs. val. R
DIN Type U
0.0064 °C
0.0064 °C + 0.0043% of abs. val. R
Type
0.016 °C
W5Re/W26Re
0.023 °C + 0.0036% of R
Millivolt Input
0.00025 mV
2, 3, or 4-Wire 0.007 Ω
Ohm Input

Range

D/A Effect
(% of span)

Entire Sensor Input Range
Entire Sensor Input Range
Entire Sensor Input Range
Entire Sensor Input Range
Entire Sensor Input Range
Entire Sensor Input Range
Entire Sensor Input Range

0.001%
0.001%
0.001%
0.001%
0.001%
0.001%
0.001%

R ≥ 1000 °C
300 °C ≤R < 1000 °C
100 °C ≤R < 300 °C

0.001%

R ≥ 0 °C
R < 0 °C
R ≥ 0 °C
R < 0 °C
All
R ≥ 200 °C
R < 200 °C
R ≥ 0 °C
R < 0 °C
R ≥ 0 °C
R < 0 °C
R ≥ 0 °C
R < 0 °C
R ≥ 200 °C
R < 200 °C
Entire Sensor Input Range
Entire Sensor Input Range

0.001%
0.001%
0.001%
0.001%
0.001%
0.001%
0.001%
0.001%
0.001%
0.001%
0.001%

(1) Change in ambient is in reference to the calibration temperature of the transmitter (20° C [68° F])
(2) α = 0.00385
(3) α = 0.003916

Temperature Effects Example
When using a Pt 100 (α = 0.00385) sensor input with a 0 to 100 °C span at
30 °C ambient temperature, the following statements would be true:
Digital Temp Effects: 0.0015 °C  [(30 – 20)] = 0.015 °C
D/A Effects: [0.001% of 100]  [(30 – 20)] = 0.01 °C
Worst Case Error: Digital + D/A + Digital Temp Effects + D/A Effects = 0.10 °C
+ 0.02 °C + 0.015 °C + 0.01 °C = 0.145 °C
Total Probable Error: 0.102 + 0.02 2 + 0.015 2 + 0.012 = 0.10° C

A-6

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Model 3144P

DIMENSIONAL DRAWINGS
Switch Location
Fail Mode
and Security
Switch
Diagram of
Switches

Cover with Wiring Diagram Label

Failure Mode

Security

4.4 in. (112 mm)

Nameplate
LCD
Connector
Electronics Module
4.4 in. (112 mm)

LCD Meter

Housing with
Permanent
Terminal Block

2352A01D, 0000A03B

Transmitter Exploded View

LCD Meter Faceplate

3144-0001B01B,

Meter Cover

Transmitter Dimensional Drawing
Top View

Meter Cover

5.2 (132) with LCD Meter
4.4 (112)

4.4
(112)

2.0
(51)

4.4
(112)

Label
3

/8-16 UN-2B

3144-0204B02A, 0000A07A

Conduit Entry

Side View

Conduit Entry

Dimensions are in inches (millimeters)

A-7

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Model 3144P

Transmitter Dimensional Drawing for Conduits with
M20 x 1.5, PG 13.5, and JIS G1/2 Entries
Top View

0.85 (21.6)*

4.00 (102)

* Clearance required
to remove cover)

0.5
(12.7)

0.21 (5.3)

4.4
(112)

0.94 (23.8)

2.0
(50.8)

3

/8–16
UN–2B

4.40 (112)

Adapters for M20 x 1.5, PG
13.5, and JIS G1/2 entries

1.17
(29.8)

3144-3144A021A, A022A

5.20 (132)
4.40 (112)

Front View

Adapters for M20 x 1.5, PG 13.5, and JIS G1/2 entries
Dimensions are in inches (millimeters)

Optional Transmitter Mounting Brackets
1.0 (25)

1.04 (26)

2.81 ±0.03
(71)
3.65
±0.06 (92)

0.41 (10)
Diameter

2.0 ± 0.03
(50)

1.55 (39)

0.375 (10)
Diameter
(2 Places)

3044-2101A01A; B01B, 3144-3144A14A,

Option Code B4 Bracket

2 (51) Diameter Washer
(Provided)

1.0 (25.4)

6.4 (162.6)
7.15 (181.6)
2.81 (71.4)
Dimensions are in inches (millimeters)

A-8

3144- 1081A01A

Option Code B5 Bracket

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Model 3144P

ORDERING INFORMATION
Transmitter
Model

Product Description

3144P
Code

Smart Temperature Transmitter
Transmitter Housing Type/Conduit Entry

D1
D2
D3
D4
D5
D6
D7
D8
Code

Field Mount Housing (Dual-Compartment), Aluminum, 1/2–14 NPT
Field Mount Housing (Dual-Compartment), Aluminum, M20 x 1.5 (CM20)
Field Mount Housing (Dual-Compartment), Aluminum, PG 13.5 (PG11)
Field Mount Housing (Dual-Compartment), Aluminum, JIS G 1/2
Field Mount Housing (Dual-Compartment), Stainless Steel, 1/2–14 NPT
Field Mount Housing (Dual-Compartment), Stainless Steel, M20 x 1.5 (CM20)
Field Mount Housing (Dual-Compartment), Stainless Steel, PG 13.5 (PG11)
Field Mount Housing (Dual-Compartment), Stainless Steel, JIS G 1/2
Output

A
Code

4-20 mA with Digital Signal based on HART protocol
Measurement Type Configuration

1
2
Code

Single-Sensor Input
Dual-Sensor Input
Hazardous Locations Certifications

NA
E5
K5
KB
K6
E1
N1
I1
K1
ND
KA
E7
N7
I7
K7
I2
E4
Code

No Approval
FM explosion-proof and non-incendive approval
FM intrinsic safety, non-incendive and explosion-proof approval combination
FM and CSA intrinsic safety, explosion-proof, and non-incendive approval combination
CSA intrinsic safety, explosion-proof and non-incendive approval combination
CENELEC/Kema flameproof approval
CENELEC/BASEEFA type n approval
CENELEC/BASEEFA intrinsic safety approval
CENELEC intrinsic safety, flameproof and type n combination
CENELEC dust ignition proof approval
CENELEC/CSA intrinsic safety, explosion-proof combination
SAA flameproof approval
SAA type N approval
SAA intrinsic safety approval
SAA intrinsic safety, flameproof and Type n approval combination
CEPEL intrinsic safety approval
JIS flameproof approval; requires either housing code D4 or D8.
Options

B4
B5
M5
G1
T1
C1
F5
A1
CN
C8
C2
C4
Q4
C7
U1
U2
U4
U5
U6
X1(1)
X2
X3(1)
QS

Accessory
Universal mounting bracket for 2-inch pipe and panel mounting—SST bracket and bolts
Universal “L” mounting bracket for 2-inch pipe mounting—SST bracket and bolts
LCD meter
External ground lug assembly (See “External Ground Screw Assembly” on page A-11.)
Integral transient protector
Custom Configuration
Factory configuration of date, descriptor, and message fields (CDS required with order)
50 Hz line voltage filter
Analog output levels compliant with NAMUR recommendation NE-43, 27-June-1996, Alarm Configuration-high
Analog output levels compliant with NAMUR recommendation NE-43, 27-June-1996, Alarm Configuration-low
Low alarm (standard Rosemount alarm and saturation values)
Calibration
Transmitter-Sensor Matching–Trim to specific Rosemount RTD calibration schedule
5-point calibration (use option code Q4 to generate a calibration certificate)
Calibration certificate (3-point standard; use C4 with Q4 option for a 5-point calibration certificate)
Trim to special non-standard sensor (special sensor–customer must provide sensor information)
Dual-Input Custom Configuration (only with measurement type option code 2)
Hot Backup
Average temperature with Hot Backup and sensor drift alert
Two independent sensors
Differential temperature
Average temperature
Assembly
Assemble transmitter to a sensor assembly (hand tight, Teflon (PTFE) tape where appropriate, fully wired)
Assemble transmitter to a sensor assembly (hand tight, no Teflon (PTFE) tape, unwired)
Assemble transmitter to a sensor assembly (wrench tight, Teflon (PTFE) tape where appropriate, fully wired)
Special Certifications
Quality Certification for Safety Instrumented Systems

Typical Model Number:

3144P

D1

A

1

E5

B4

M5

(1) If ordering X1, X2, or X3 options, specify the same code in the sensor model number. Option codes X1 and X3 are not available with CSA approval.

A-9

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Model 3144P
Spare Parts List
Description

Part Number

Electronics Modules
Model 3144P Electronics Module (configured as a single sensor)
Model 3144P Electronics Module (configured as a dual-sensor)
M5 Meter Kit (includes meter display, captive mounting hardware, 10-pin interconnection header and cover)
M5 Meter Kit–Aluminum
M5 Meter Kit–Stainless Steel
Meter (includes meter, captive mounting hardware, 10-pin interconnection header)
Meter Parts
Aluminum Meter Cover Kit (includes cover and O-ring)
Stainless Steel Meter Cover Kit (includes cover and O-ring)
LCD Adapter Kit (required for using a Model 3144/3244MV meter with a Model 3144P transmitter)
Mounting Bracket Kit
B4 Mounting Bracket Kit
B5 Mounting Bracket Kit
Housing Cover (includes O-ring)
Model 3144P Aluminum Housing Cover
Model 3144P Stainless Steel Housing Cover
O-ring for cover (package of 12)
Housing Kit (does not include covers)
Model 3144P Aluminum Housing Kit
Model 3144P Aluminum Housing Kit with External Ground Lug Assembly
Model 3144P Stainless Steel Housing Kit
Model 3144P Stainless Steel Housing Kit with External Ground Lug Assembly
Additional
Screw/Washer combination for Sensor / Power Terminals (package of 12)
Jumper (10-pin)–Meter interconnection header (package of 12)
External Ground Lug Assembly (includes hardware to be used with existing ground lug installed in the transmitter–
ground lug not included in kit)
Integral Transient Protector Kit (Includes terminal screws and transient protector)

03144-3111-0001
03144-3111-0002
03144-3120-0001
03144-3120-0011
03144-3120-0002
03144-1043-0001
03144-1043-0011
03144-2114-0001
03044-2131-0001
03144-1081-0001
03144-1142-0001
03144-1142-0002
01151-0033-0003
03144-1141-0001
03144-1141-0002
03144-1141-0003
03144-1141-0004
03144-1044-0001
03144-1146-0001
03144-1047-0001
03144-3040-0001

TAGGING
Hardware

•
•
•
•
•
•

Software Tag

• The transmitter can store up to 8 characters.
• Can be ordered with different software and hardware tags.
• If no software tag characters are specified, the first 8 characters of the
hardware tag are the default.

A-10

No charge
2 lines of 28 characters (56 characters total)
Tags are stainless steel
Permanently attached to transmitter
Character height is 1/16-in. (1.6mm)
A wire-on tag is available upon request. 5 lines of 12 characters (60
characters total)

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April 2003

EXTERNAL GROUND
SCREW ASSEMBLY

Model 3144P
The external ground screw assembly can be ordered by specifying option
code G1 when an enclosure is specified. However, some approvals include
the ground screw assembly in the transmitter shipment, hence it is not
necessary to order option code G1. See below to determine which approval
options include the external ground screw assembly. Option code G1 is also
included with Integral Protector option code T1 and does not need to be
ordered separately.
Approval Type

Ground Screw Assembly Included?

NA, E5, K5, K6, KB
N1, E1, I1, ND, K1, E7, N7, I7, K7, KA, I2 and E4

No–Order option code G1
Yes

CONFIGURATION
Standard

Both standard and custom configuration settings may be changed using a
HART communicator. Unless specified, the transmitter will be shipped as
follows:
Standard Configuration

Custom

4 mA value
20 mA value
Damping
Output
Failure Mode
Line Voltage Filter
Software Tag
Optional Integral Meter
Single Sensor option

0 °C
100 °C
5 seconds
Linear with temperature
High
60 Hz
See “Tagging”
Units and mA

Sensor Type
Primary Variable (4–20 mA)
Secondary Variable
Tertiary Variable
Quaternary Variable
Dual-Sensor option

4-wire Pt 100 α = 0.00385 RTD
Sensor 1
Terminal Temperature
Not Available
Not Available

Sensor Type
Primary Variable (4–20 mA)
Secondary Variable
Tertiary Variable
Quaternary Variable

Two 3-wire Pt 100 α = 0.00385 RTD
Sensor 1
Sensor 2
Terminal Temperature
Not Used

The Model 3144P transmitter can be ordered with custom configuration. The
table below lists the requirements necessary to specify a custom
configuration.
Option Code

Requirements/Specification

C1:
Factory Data(1)

Date: day/month/year
Descriptor: 16 alphanumeric character
Message: 32 alphanumeric character
Custom Alarm Levels can be specified for configuration at the factory.
The transmitters are designed to accept Callendar-van Dusen
constants from a calibrated RTD schedule and generate a custom
curve to match any specific sensor curve. Specify a Series 68, 65, or
78 RTD sensor on the order with a special characterization curve (V
or X8Q4 option). These constants will be programmed into the
transmitter with this option.
Will include five-point calibration at 0, 25, 50, 75, and 100% analog
and digital output points.
Use with option code Q4 to obtain a Calibration Certificate.

C2:
Transmitter Sensor
Matching

C4:
Five Point Calibration

A-11

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Model 3144P
Option Code

Requirements/Specification

C7:
Special Sensor

Used for non-standard sensor, adding a special sensor or expanding
input.
Customer must supply the non-standard sensor
information.Additional special curve will be added to sensor curve
input choices.
Analog output levels compliant with NAMUR. Alarm is set to fail high.

A1: NAMURCompliant, high alarm
CN: NAMURCompliant, low alarm
C8: Low Alarm
F5: 50 Hz Line Filter
(1)

Analog output levels compliant with NAMUR. Alarm is set to fail low.
Rosemount standard analog output levels with alarm set to fail low
Calibrated to 50 Hz line voltage filter.

CDS required

To custom configure the Model 3144P with the dual-sensor option transmitter
for one of the applications described below, indicate the appropriate option
code in the model number. If a sensor type is not specified, the transmitter will
be configured for two 3-wire Pt 100 (α = 0.00385) RTDs if any of the following
option codes are selected.
Option Code U1: Hot Backup Configuration
Primary Usage

Primary Variable (4–20 mA)
Secondary Variable
Tertiary Variable
Quaternary Variable

Primary usage sets the transmitter to automatically use
sensor 2 as the primary input if sensor 1 fails. Switching
from sensor 1 to sensor 2 is accomplished without any
effect on the analog signal.
Sensor 1
Sensor 2
Terminal Temperature
Not Used

Option Code U2: Average Temperature with Hot Backup and Sensor Drift Alert(1)
Primary Usage

Primary Variable (4–20 mA)
Secondary Variable
Tertiary Variable
Quaternary Variable

Critical applications, such as safety interlocks and control
loops. Outputs the average of two measurements and alerts
if temperature difference exceeds the set maximum
differential (sensor drift alert). If a sensor fails, an alert will
be sent and the primary variable will hold working sensor
measurement.
Sensor Average
Sensor 1
Sensor 2
Terminal Temperature

(1) Default Drift Alert Configuration Temperature difference limit is 3 °C (5.4 °F). Damping is 5 seconds.

Option Code U4: Two Independent Sensors
Primary Usage
Primary Variable (4-20 mA)
Secondary Variable
Tertiary Variable
Quaternary Variable

Used in non-critical applications where the digital output is
used to measure two separate process temperatures.
Sensor 1
Sensor 2
Terminal Temperature
Not Used

Option Code U5: Differential Temperature
Primary Usage
Primary Variable (4–20 mA)
Secondary Variable
Tertiary Variable
Quaternary Variable

A-12

The differential temperature of two process temperatures
are configured as the primary variable.
Differential Temperature
Sensor 1
Sensor 2
Terminal Temperature

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Model 3144P
Option Code U6: Average Temperature
Primary Usage

Primary Variable (4-20 mA)
Secondary Variable
Tertiary Variable
Quaternary Variable

When average measurement of two different process
temperatures is required.
If a sensor fails, an alert will be sent and the primary
variable will hold the measurement of the working sensor.
Sensor Average
Sensor 1
Sensor 2
Terminal Temperature

A-13

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Model 3144P

A-14

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April 2003

Appendix B

Model 3144P

Product Certifications
Hazardous Locations Installations . . . . . . . . . . . . . . . . . . page B-1
Installation Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page B-5

HAZARDOUS
LOCATIONS
INSTALLATIONS

The transmitter is designed with explosion-proof housings and circuitry
suitable for intrinsically safe and non-incendive operation. Each transmitter is
clearly marked with a tag indicating the approvals. To maintain certified
ratings for installed transmitters, install in accordance with all applicable
installation codes and approval drawings. Verify that the operating
atmosphere of the transmitter is consistent with the appropriate hazardous
locations certifications. Both transmitter covers must be fully engaged to meet
explosion proof requirements.

North American
Approvals

Factory Mutual (FM) Approvals
E5 Explosion Proof for Class I, Division 1, Groups A, B, C, and D.
Dust Ignition-Proof for use in Class II/III, Division 1, Groups E, F, and G.
Explosion-Proof and Dust Ignition-Proof when installed in accordance
with Rosemount drawing 03144-0320. Indoor and outdoor use. NEMA
Type 4X.
Temperature code: T5 (Tamb = – 50 to 85 °C)
NOTE
For Group A, seal all conduits, seal all conduits within 18 inches of enclosure;
otherwise, conduit seal not required for compliance with NEC 501-5a(1).
Non-incendive for use in Class I, Division 2, Groups A, B, C, and D.
Non-incendive when installed in accordance with Rosemount drawing
03144-0321.
Temperature codes: T5 (Tamb = – 50 to 85 °C),
T6 (Tamb = – 50 to 60°C)
K5 Combination of E5 and the following:
Intrinsically Safe for Class I/II/III, Division 1, Groups A, B, C, D, F, and G.
Temperature codes: T4A (Tamb = – 50 to 60 °C),
T5 (Tamb = – 50 to 50°C)
Non-Incendive for use in Class I, Division 2, Groups A, B, C, and D.
Suitable for use in Class II/III, Division 2, Groups F and G.
Temperature codes: T5 (Tamb = – 50 to 85 °C),
T6 (Tamb = – 50 to 60°C)
Intrinsically safe and non-incendive when installed in accordance with
Rosemount drawing 03144-0321.

www.rosemount.com

Reference Manual
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April 2003

Model 3144P

Canadian Standards Association (CSA) Approvals
K6 Combination of the following:
Explosion Proof for Class I, Division 1, Groups A, B, C, and D; Class II,
Division 1, Groups E, F, and G; Class III, Division 1 hazardous locations.
Factory sealed. Class I, Division 2, Groups A, B, C, and D.
Intrinsically Safe for Class I, Division 1, Groups A, B, C, and D; Class II,
Division 1, Groups E, F, and G; Class III, Division 1 hazardous locations
intrinsically safe when installed in accordance with Rosemount drawing
03144-0322.

European Approvals

E1 Flameproof Approval (Zone 1)
Certificate Number: KEMA01ATEX2181
ATEX Category Marking
II 2 G
EEx d IIC T6 (Tamb = –40 to 70 °C)
EEx d IIC T5 (Tamb = –40 to 80 °C)
Max supply voltage: 55 Vdc
ND CENELEC Dust Ignition Proof Approval
Certificate Number: KEMA01ATEX2181
ATEX Category Marking
II 1 D
T95 °C (Tamb = –40 to 85 °C)
N1 CENELEC Type n Approval (Zone 2)
Certificate Number: BAS01ATEX3432X
ATEX Category Marking
II 3 G
EEx nL IIC T6 (Tamb = –40 to 50 °C)
EEx nL IIC T5 (Tamb = –40 to 75 °C)
Ui = 55V
Special Conditions for Safe Use (x):
The transmitter is not capable of withstanding the 500 insulating test required
by Clause 9.1 of EN50021:1999. This condition must be taken into account
during installation.
I1

Table B-1. Input Entity
Parameters

CENELEC Intrinsic Safety Approval (Zone 0)
Certificate Number: BAS01ATEX1431X
ATEX Category Marking
II 1 G
EEx ia IIC T6 (Tamb = –60 to 50 °C)
EEx ia IIC T5 (Tamb = –60 to 75 °C)

Power/Loop

Sensor

Ui = 30 V dc
Ii = 300 mA
Pi = 1.0 W
Ci = 5 nF
Li = 0

Uo = 13.6 V
Io = 56 mA
Po =190 mW
Ci = 78 nF
Li = 0

Special Conditions for Safe Use (x):
The transmitter is not capable of withstanding the 500V insulation test as
defined in Clause 6.4.12 of EN50 020. This condition must be taken into
account during installation.
K1 Combination of E1, N1, and I1

B-2

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April 2003

Australian Approvals

Model 3144P
Standard Australia Quality Assurance Services (SAA)
E7 Flameproof Approval
Certificate Number: AUS Ex 02.3813X
Ex d IIC T6 (Tamb = –20 to 60 °C)
Special Conditions for Safe Use (x):
1. Apparatus must be installed in accordance to Rosemount drawing
03144-0325.
2. If the sensor is intended to be remote mounted, it should be installed in a
suitable Standards Australia certified Flame-Proof enclosure and
installed in accordance with Rosemount drawing 03144-0325.
3. Standards Australia certified cable glands or conduit adapters must be
used when connecting to external circuits. Where only one conduit entry
is used for connection to external circuits, the unused entry is to be
closed by means of a blanking plug supplied by Rosemount or by a
suitable Standards Australia certified blanking plug.
N7 Type N Approval
Certificate Number: AUS Ex 02.3794X
Ex n IIC T6 (Tamb = –60 to 50 °C)
Ex n IIC T5 (Tamb = –60 to 75 °C)
IP66
Un = 55 V
Pn = 1.3 W
I7

Table B-2. Input Entity
Parameters

Intrinsic Safety Approval
Certificate Number: AUS Ex 02.3794X
Ex ia IIC T6 (Tamb = –60 to 50 °C)
Ex ia IIC T5 (Tamb = –60 to 75 °C)

Power/Loop

Sensor

Ui = 30 V dc
Ii = 300 mA
Pi = 1.0 W
Ci = 0.005 µF
Li = 20 µH

Uo = 13.6 V
Io = 100 mA
Po = 80 mW
Co = 0.66 µF
Lo = 1.9 mH

Special Conditions for Safe Use (x):
1. For options using the transient protection board, the apparatus should be
connected to earth with a copper conductor of 4 mm (^2) or greater.
2. For the label with more than one type of marking on it, upon completion
of commissioning the apparatus the irrelevant marking code(s) shall be
permanently scrubbed off.
K7 Combination of E7, N7, and I7.

B-3

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Model 3144P
Japanese Approval

Japanese Industrial Standard (JIS) Flameproof Certification
E4 Without sensor: Ex d IIB T6 (Tamb = –20 to 55 °C)
With sensor: Ex d IIB T4 (Tamb = –20 to 55 °C)

Brazilian Approval

Centro de Pesquisas de Energia Eletrica (CEPEL) Approval
I2

Intrinsic Safety
BR-Ex ia IIC T6

Combination Approval

Factory Mutual and Canadian Standards Association Approvals
KB Combination of K5 and K6
CENELEC and CSA Approvals
KA Combination of K1 and K6

Additional Approvals

American Bureau of Shipping (ABS) Type Approval
ABS Type Approval for temperature measurements in hazardous locations on
ABS Classed Vessels, Marine and Offshore Installations. Type Approval is
based on Factory Mutual (FM) Approvals; therefore, specify order code K5.
Please contact your Emerson Process Management representative if a copy
of the certification is required.
Det Norske Veritas (DNV) Type Approval for Shipboard and Offshore
Installations
DNV rules for classifications of ships and mobile offshore units for
temperature measurements in the following locations:

Table B-3. Applications /
Limitations

Location

Class

Temperature
Humidity
Vibration
Enclosure

D
B
B/C
D

NOTE
The transient protector (option code T1) is required when requesting DNV
Type Approval. Additionally, hazardous locations approvals may be required
(based on shipboard location) and will need to be specified by the Hazardous
Locations option code.
Please contact your Emerson Process Management representative if a copy
of the certification is required.
GOSTANDART
Tested and approved by Russian Metrological Institute GOSTANDART.

B-4

Reference Manual
00809-0100-4021, Rev BA
April 2003

INSTALLATION
DRAWINGS

Model 3144P
Rosemount Drawing 03144-0320, 1 Sheet:
Factory Mutual Explosion-proof Installation Drawing.
Rosemount Drawing 03144-0321, 3 Sheets:
Factory Mutual Intrinsic Safety and Nonincendive Field Circuit Configuration
Installation Drawing.
Rosemount Drawing 03144-0322, 1 Sheet:
CSA Intrinsic Safety Approval Configuration Installation Drawing.
Rosemount Drawing 03144-0324, 1 Sheet:
KEMA/CENELEC Flame-proof Temperature Measurement Assembly
Installation Drawing.
Rosemount Drawing 03144-0325, 1 Sheet:
SAA Flameproof Temperature Measurement Assembly Installation Drawing.
IMPORTANT
Once a device labeled with multiple approval types is installed, it should not
be reinstalled using any of the other labeled approval types. To ensure this,
the approval label should be permanently marked to distinguish the used from
the unused approval type(s).

B-5

Reference Manual

Model 3144P

00809-0100-4021, Rev BA
April 2003

3144_3144-0320A01A

Figure B-1. Factory Mutual Explosion-Proof Installation Drawing 03144-0320, Rev. AB

B-6

Reference Manual
00809-0100-4021, Rev BA
April 2003

Model 3144P

3144_3144-0321A01A

Figure B-2. Factory Mutual Intrinsic Safety and Noincendive Field Circuit Configuration Installation Drawing
03144-0321, Rev.AB

B-7

Reference Manual
00809-0100-4021, Rev BA
April 2003

3144_3144-0321A02A

Model 3144P

B-8

Reference Manual

Model 3144P

3144_3144-0321A04A

00809-0100-4021, Rev BA
April 2003

B-9

Reference Manual

Model 3144P

00809-0100-4021, Rev BA
April 2003

3144_3144-0322A01A

Figure B-3. CSA Intrinsic Safety Approval Configuration Installation Drawing 03144-0322, Rev. AA

B-10

Reference Manual
00809-0100-4021, Rev BA
April 2003

Model 3144P

3144_3144-0324A02A

Figure B-4. ISSEP\CENELEC Flame-Proof Temperature Measurement Assembly Installation Drawing
03144-0324, Rev. AA

B-11

Reference Manual

Model 3144P

00809-0100-4021, Rev BA
April 2003

3144_3144-0325A01A

Figure B-5. Standard Australia Quality Assurance Services Flameproof Temperature Measurement Assembly
Installation Drawing 03144-0325, Rev. AA

B-12

Reference Manual
00809-0100-4021, Rev BA
April 2003

Appendix C

Model 3144P

Safety Instrumented
System (SIS)
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page C-1
Failure Rate Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page C-2
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page C-3

OVERVIEW

This section details the requirements for using the Model 3144P in Safety
Instrumented Systems (SIS). Although the Model 3144P is not certified for
functional safety per IEC61508, a complete Failure Modes, Effects, and
Diagnosis Analysis (FMEDA) was completed to determine the safe failure
fraction (SFF) when using this device in a SIS application.
FMEDA are the device characteristics that are taken into account when
attempting to achieve functional safety certification per IEC61508 of a device.
From the FMEDA, failure rates are determined for all temperature sensing
device options. Furthermore, the Safe Failure Fraction is calculated for each
of the four different input device configurations.
The Model 3144P is an isolated 2-wire 4-20 mA SMART device classified as
Type B according to IEC61508. It contains self-diagnostics and is
programmed to send its output to either a high or low failure state upon
internal detection of a failure.
The analysis shows that the device has a safe failure fraction between 60 and
90% (assuming that the logic solver is programmed to detect over-scale and
under-scale currents). The device has a safe failure fraction of over 90%
when used with a temperature sensing device, such as thermocouple or RTD.
The device can detect open and short circuit failures of these temperature
sensing devices.

Table C-1. Definitions
Abbreviation

λ

H

λL

Description
Fail High

(1)

Failure that will result in an output current that is
higher than 20 mA

Fail Low(1)

Failure that will result in an output current that is
lower than 4 mA

λDU

Fail Dangerous Undetected

Failure that is dangerous and that is not being
diagnosed by internal diagnostics

SFF

Safe Failure Fraction

Fraction of the overall failure rate of a device
that results in either a safe fault or a diagnosed
unsafe fault.

(1) Detected by the logic solver.

www.rosemount.com

Definition

Reference Manual
00809-0100-4021, Rev BA
April 2003

Model 3144P
FAILURE RATE DATA
Model 3144P with and
without a RTD

The failure rates for the Model 3144P transmitter operating in 4-wire RTD
mode, excluding the failure rates for the sensing device, are as follows:
•

λH = 32.85 * 10-9 failures per hour

•

λL = 351.96 * 10-9 failures per hour(1)

•

λDU = 74.29 * 10-9 failures per hour

•

SFF = 83.82%(2)

If these are combined with failure rates for a closely coupled, shock protected,
4-wire RTD then the total failure rates for the temperature sensing subsystem
are as follows:

Model 3144P with and
without a Thermocouple

•

λH = 32.85 * 10-9 failures per hour

•

λL = 2331.96 * 10-9 failures per hour (1)

•

λDU = 94.29 * 10-9 failures per hour

•

SFF = 96.17%(2)

The failure rates for the Model 3144P transmitter operating in thermocouple
mode, excluding the failure rates for the sensing device, are as follows:
•

λH = 32.85 * 10-9 failures per hour

•

λL = 344.16 * 10-9 failures per hour(1)

•

λDU = 74.29 * 10-9 failures per hour

•

SFF = 82.62%

If these are combined with failure rates for a closely coupled thermocouple
then the total failure rates for temperature sensing subsystem are as follows:

(1)
(2)

C-2

•

λH = 32.85 * 10-9 failures per hour

•

λL = 5094.16 * 10-9 failures per hour(1)

•

λDU = 329.29 * 10-9 failures per hour

•

SFF = 93.96%(2)

Assuming the specified failure state is low.
Assuming the high and low out of range signals are detected by the logic solver.

Reference Manual
00809-0100-4021, Rev BA
April 2003

Model 3144P

INSTALLATION

No special installation practices are necessary with the Model 3144P in a
Safety Instrumented System. However, a full review of the Failure Mode and
Security switches is required. Follow the standard installation requirements
(see Section 2: Installation).

Switches

Failure Mode Switch
The transmitter monitors itself during normal operation using an automatic
diagnostic routine. If the diagnostic routine detects a sensor failure or a failure
in the transmitter electronics, the transmitter goes into high or low alarm,
depending on the position of the failure mode switch.
The analog alarm and saturation values that the transmitter uses depend on
whether it is configured to standard (set by the factory) or NAMUR-compliant
operation. These values are also custom-configurable in both the factory and
the field using the Model 275 HART Communicator. The limits are:
•

21.0 ≤I ≤23 for high alarm

•

3.5 ≤I ≤3.75 for low alarm

The values for standard and NAMUR operation are as follows:
Characteristics

Standard Operation

NAMUR-Compliant Operation

Fail High
High Saturation
Low Saturation
Fail Low

21.75 mA ≤I ≤23.0 mA
I ≥ 20.5 mA
I ≤3.90 mA
I ≤3.75 mA

21.0 mA ≤I ≤23.0 mA
I ≥ 20.5 mA
I ≤3.8 mA
I ≤3.6 mA

Transmitter Security Switch
The transmitter is equipped with a write-protect switch that can be positioned
to prevent both accidental and deliberate change of configuration data.

Changing Switch
Position

The Failure Mode and Security switches are located on the top center of the
electronics module (see Figure C-1). The electronics module is on the
electronics side of the transmitter housing. For transmitters with LCD meters,
the electronics module is located behind the LCD meter faceplate.
Without a LCD meter
1. If the transmitter is installed, set the loop to manual.
2. Remove the housing cover on the electronics side of the transmitter. Do
not remove the transmitter cover in explosive atmospheres when the
circuit is live.
3. Set the switches to the desired position (see Figure C-1).
4. Replace the transmitter cover. Both transmitter covers must be fully
engaged to meet explosion-proof requirements.
5. Set the loop to automatic control.

C-3

Reference Manual
00809-0100-4021, Rev BA
April 2003

Model 3144P
With a LCD meter

1. If the transmitter is installed, set the loop to manual.
2. Remove the housing cover on the electronics side of the transmitter. Do
not remove the transmitter cover in explosive atmospheres when the
circuit is live.
3. Remove the housing cover, unscrew the LCD meter screws and gently
slide the meter straight off.
4. Set the switches to the desired position (see Figure C-1).
5. Gently slide the LCD meter back into place, taking extra precautions of
the 10 pin connection.
6. Secure the LCD meter by replacing the LCD meter screws.
7. Replace the transmitter cover. Both transmitter covers must be fully
engaged to meet explosion-proof requirements.
8. Set the loop to automatic control.
Figure C-1. Transmitter Jumper
Locations.

Switch Location

LCD Meter Faceplate

Diagram of
Switches
Failure Mode

Security

LCD Connector

C-4

3144- 0200G33A, 0001B01B

Fail Mode and Security Switch

Reference Manual
00809-0100-4021, Rev BA
April 2003

Model 3144P

Index
Scaled Output Trim .
Sensor Input Trim . .
Trans-Sensor Match
Updating Software .

Numerics
275 HART Communicator . . . . . . 3-2
Apply AMS Changes . . . . . . 3-5
Check Output . . . . . . . . . . . 3-6
Process Variables . . . . . 3-6
Configuration . . . . . . . . . . . 3-6
2-Wire RTD Offset . . . . 3-8
Average Temperature . 3-10
Change Connections . . . 3-7
Change Type . . . . . . . . 3-7
Differential Temperature 3-9
Drift Alert . . . . . . . . . . 3-13
Dual-Sensor . . . . . . . . . 3-9
First-Good . . . . . . . . . 3-11
Hot Backup . . . . . . . . 3-12
Output Units . . . . . . . . . 3-7
Sensor 1 Serial Number . 3-8
Sensor 2 Serial Number . 3-8
Sensor Configuration . . . 3-6
Terminal Temperature . . 3-9
Variable Mapping . . . . . 3-6
Device Information . . . . . . . 3-18
Date . . . . . . . . . . . . . 3-18
Descriptor . . . . . . . . . 3-18
Message . . . . . . . . . . 3-18
Tag . . . . . . . . . . . . . . 3-18
Device Output Configuration 3-14
Alarm and Saturation . . 3-16
HART Output . . . . . . . 3-17
LCD Meter Options . . . 3-17
PV Damping . . . . . . . . 3-15
PV Range Values . . . . 3-14
Diagnostics . . . . . . . . 4-9, 4-17
Diagnostics and Service . . . 3-21
Loop Test . . . . . . . . . . 3-22
Test Device . . . . . . . . 3-21
Fast Key Sequences . . . . . . 3-4
Measurement Filtering . . . . 3-19
50/60 Hz Filter . . . . . . 3-19
Intermittent Threshold . 3-19
Master Reset . . . . . . . 3-19
Open Sensor Holdoff . . 3-21
Sensor Detect . . . . . . . 3-19
Menu Tree . . . . . . . . . . . . . 3-3
Output Trim . . . . . . . . . . . . 4-8
Review Configuration Data . . 3-5
Review . . . . . . . . . . . . 3-5

www.rosemount.com

......
......
......
......

4-8
4-2
4-5
3-2

A
AMS . . . . . . . . . . . . . . . . . . . . 3-5
2-Wire RTD Offset . . . . . . . 3-8
Alarm and Saturation . . . . 3-17
Average Temperature . . . . .3-11
Change Connections . . . . . . 3-7
Change Type . . . . . . . . . . . 3-7
Device Information . . . . . . 3-18
Diagnostics . . . . . . . 4-10, 4-20
Differential Temperature . . 3-10
Drift Alert . . . . . . . . . . . . . 3-14
First Good Configuration . . .3-11
HART Output . . . . . . . . . . 3-17
Hot Backup . . . . . . . . . . . 3-13
Intermittent Sensor Detect . 3-19
LCD Meter Options . . . . . . 3-18
Loop Test . . . . . . . . . . . . 3-22
Master Reset . . . . . . . . . . 3-19
Multidrop Communication . 3-23
Open Sensor Holdoff . . . . . 3-21
Output Units . . . . . . . . . . . . 3-7
Process Variable Damping . 3-16
Process Variables . . . . . . . . 3-6
PV Range Values . . . . . . . 3-15
Review . . . . . . . . . . . . . . . 3-5
Scaled Ouput Trim . . . . . . . 4-8
Screens Messages . . . . . . 4-16
Sensor 1 Serial Number . . . 3-8
Sensor 2 Serial Number . . . 3-8
Sensor Input Trim . . . . . . . . 4-5
Terminal Temperature . . . . . 3-9
Test Device . . . . . . . . . . . 3-21
Transmitter-Sensor Matching 4-6
Variable Mapping . . . . . . . . 3-6
Variables . . . . . . . . . . . . . 4-20

Approvals . . . . . . . .
ABS . . . . . . . . .
Australian . . . . .
Brazilian . . . . . .
Combination . . .
DNV . . . . . . . . .
European . . . . .
GOSTANDART .
Japanese . . . . .
North American .
CSA . . . . . .
FM . . . . . . .

. . . . . . . . .B-1
. . . . . . . . .B-4
. . . . . . . . .B-3
. . . . . . . . .B-4
. . . . . . . . .B-4
. . . . . . . . .B-4
. . . . . . . . .B-2
. . . . . . . . .B-4
. . . . . . . . .B-4
. . . . . . . . .B-1
. . . . . . . . .B-2
. . . . . . . . .B-1

C
Calibration . . . . . . . . . . . . . . . . . 4-2
Trim the Transmitter . . . . . . . 4-2
Ouput Trim . . . . . . . . . . 4-8
Scaled Output Trim . . . . 4-8
Sensor Input Trim . . . . . 4-2
Trans-Sensor Match . . . 4-5
Commissioning . . . . . . . . . . . . . . 2-2
Set Loop to Manual . . . . . . . 2-2
Set the Switches . . . . . . . . . 2-3
Failure Mode . . . . . . . . . 2-3
Securty . . . . . . . . . . . . . 2-3
With LCD Meter . . . . . . . 2-3
Without LCD meter . . . . 2-3
Configuration . . . . . . . . . . . . . .A-11
Custom . . . . . . . . . . . . . . .A-11
Standard . . . . . . . . . . . . . .A-11
Considerations . . . . . . . . . . . . . . 1-1
Electrical . . . . . . . . . . . . . . . 1-2
Environmental . . . . . . . . . . . 1-2
Corrosive . . . . . . . . . . . 1-3
Moist . . . . . . . . . . . . . . 1-3
Temperature Effects . . . 1-2
General . . . . . . . . . . . . . . . . 1-1
Mounting . . . . . . . . . . . . . . . 1-3
Housing Circuit Side . . . 1-3
Housing Terminal Side . . 1-3
Software Compatibility . . . . . 1-3
Corrosive Environments . . . . . . . 1-3
Current Loop Connections . . . . . 2-11

Reference Manual
00809-0100-4021, Rev BA
April 2003

Model 3144P
D

I

Differences
3144P vs. 3144/3244MV . .
Drawings
Dimensional . . . . . . . . . . .
Conduits . . . . . . . . . .
Incorrect Conduit Installation
Installation . . . . . . . . . . . .
LCD Meter Faceplate . . . . .
Mounting Brackets . . . . . . .
Mounting with Drain Seal . .
Sensor Wiring . . . . . . . . . .
Switch Location . . . . . . . . .
Switch Locations . . . . . . . .
Terminal Block . . . . . . . . .
Transmitter . . . . . . . . . . . .

Installation . . . . . . . . . . . . . . .
European . . . . . . . . . . . . .
LCD Meter . . . . . . . . . . . .
Multichannel . . . . . . . . . . .
North American . . . . . . . .
Sensor Wiring . . . . . . . . . .
SIS . . . . . . . . . . . . . . . . .
With a 333 HART Tri-Loop .
Installation Drawings . . . . . . . .

. 1-4
. A-7
. A-8
. 2-4
. B-5
. A-7
. A-8
. 2-4
2-10
. A-7
. 2-3
. 2-9
. A-7

E
Electronics Housing
Assembling . . . . . . . . . . . . 4-13
Replacing . . . . . . . . . . . . . 4-13
External Ground Screw . . . . . . . A-11

F
Fast Key Sequences . . . . . . . . . 3-4

G
Grounding . . . . . . . . . . . . . . . .
Shielding . . . . . . . . . . . . .
Shielding Recommendations
mV . . . . . . . . . . . . . .
RTD/Ohm Inputs . . . . .
Thermocouple . 2-13,
Transmitter Housing . . . . .

2-13
2-13
2-13
2-13
2-13
2-14
2-14

H
Hardware . . . . . . . . . . . . . . . . . 4-9
Diagnostics HART Comm . . . 4-9
Diagnostics with AMS . . . . 4-10
Maintenance . . . . . . . . . . . 4-12
Electronics . . . . . . . . . 4-12
Sensor Checkout . . . . 4-12
Test Terminal . . . . . . . 4-12
HART Communicator
See 275 HART Communicator . .

3-2

HART Tri-Loop . . . . . . . . . . . . 3-24
Burst Mode . . . . . . . . . . . . 3-24
Detect Sensor Drift Alert . . . 3-25
Diff Temp Measure . . . . . . 3-25
Hot Backup . . . . . . . . . . . . 3-25
Process Variable Output Order . .

3-24

Hazardous Locations Installations
See Approvals . . . . . . . . . . B-1

Index-2

Set

. 2-5
. 2-6
. 2-8
. 2-9
. 2-5
2-10
. C-3
. 2-7
. B-5

L
LCD Meter
Diagnostics . . . . . . . . . . . 4-13
Installation . . . . . . . . . . . . . 2-8
Set switches . . . . . . . . . . . . 2-3

M
Menu Tree . . . . . . . . . . . . . . . . 3-3
Moist Environments . . . . . . . . . . 1-3
Mounting . . . . . . . . . . . . . . 1-3, 2-4
Conduit Installation
Incorrect . . . . . . . . . . . 2-4
Considerations . . . . . . . . . . 1-3
Mounting with Drain Seal . . . 2-4
Multichannel Installation . . . . . . . 2-9
Multidrop Communication . . . . . 3-23

O
Ordering Information
Spare Parts . . .
Transmitter . . . .
Overview . . . . . . . .
Manual . . . . . .
SIS . . . . . . . . .
Transmitter . . . .

. . . . . . . . . A-9
. . . . . . . . A-10
. . . . . . . . . A-9
. . . . . . . . . 1-1
. . . . . . . . . 1-1
. . . . . . . . . C-1
. . . . . . . . . 1-1

P
Power Connections . .
Power Supply . . . . . .
Grounding . . . . .
Surges/Transients
Product Certifications
See Approvals . .

. . . . . . . .2-11
. . . . . . . 2-12
. . . . . . . 2-13
. . . . . . . 2-12
. . . . . . . . B-1

S
Sensor Connection
Millivolt . . . . .
Ohm . . . . . . .
RTD . . . . . . .
Thermocouple

. . . . . . . . . 2-10
. . . . . . . . . .2-11
. . . . . . . . . 2-10
. . . . . . . . . 2-10
. . . . . . . . . .2-11

Loop to Manual . . . . . .
Switches . . . . . . . . . . .
Failure Mode . . . . .
Security . . . . . . . .
With LCD meter . . .
Without LCD meter

. . . . 2-2
. . . . 2-3
. . . . 2-3
. . . . 2-3
. . . . 2-3
. . . . 2-3

SIS
Failure Rate Data . . . . . . . . C-2
RTD . . . . . . . . . . . . . . C-2
Thermocouple . . . . . . . C-2
Installation . . . . . . . . . . . . . C-3
Switches . . . . . . . . . . . C-3
Software
275 HART Communicator
Updating . . . . . . . . . . . . 3-2
Considerations . . . . . . . . . . . 1-3
Specifications . . . . . . . . . . . . . . .A-1
Functional . . . . . . . . . . . . . .A-1
Custom Alarm Levels . . .A-3
Failure Mode . . . . . . . . .A-2
Humidity Limits . . . . . . .A-2
Inputs . . . . . . . . . . . . . .A-1
Isolation . . . . . . . . . . . .A-2
Load Limits . . . . . . . . . .A-1
Local Indication . . . . . . .A-2
Output . . . . . . . . . . . . .A-1
Power Supply . . . . . . . .A-1
Saturation Levels . . . . . .A-3
Temperature Limits . . . .A-2
Transient Protection . . . .A-2
Turn-on Time . . . . . . . .A-2
Update Time . . . . . . . . .A-2
Performance . . . . . . . . . . . .A-4
5 Year Stability . . . . . . .A-4
Accuracy . . . . . . . . . . .A-5
Amb Temp Effect . . . . . .A-6
CE Electromagnetic . . . .A-4
Power Supply Effect . . . .A-4
RFI Effect . . . . . . . . . . .A-4
Self Calibration . . . . . . .A-4
Stability . . . . . . . . . . . .A-4
Vibration Effect . . . . . . .A-4
Physical . . . . . . . . . . . . . . .A-3
Conduit Connections . . .A-3
Enclosure Ratings . . . . .A-4
HART Connections . . . .A-3
Materials . . . . . . . . . . . .A-3
Mounting . . . . . . . . . . .A-3
Weight . . . . . . . . . . . . .A-3
Surges/Transients . . . . . . . . . . 2-12
Switches
Failure Mode . . . . . . . . . . . . 2-3
Location . . . . . . . . . . . . . . . 2-3
SIS . . . . . . . . . . . . . . . . . . C-3
Change Switch Position C-3
Transmitter Security . . . . . . . 2-3

Reference Manual
00809-0100-4021, Rev BA
April 2003

Model 3144P

T
Tagging . . . . . . . .
Hardware . . . .
Software Tag .
Temperature Effects
Transients/Surges .

. . . . . . . . . A-10
. . . . . . . . . A-10
. . . . . . . . . A-10
. . . . . . . . . . 1-2
. . . . . . . . . 2-12

W
Wiring . . . . . . . . . . . . . . . . . . .
Current Loop Connections .
Field Wiring . . . . . . . . . . .
Power Connections . . . . . .
Sensor Connections . . . . .
Millivolt . . . . . . . . . . .
Ohm . . . . . . . . . . . . .
RTD . . . . . . . . . . . . .
Thermocouple . . . . . .

. 2-9
2-11
. 2-9
2-11
2-10
2-11
2-10
2-10
2-11

Index-3

Reference Manual

Model 3144P

Index-4

00809-0100-4021, Rev BA
April 2003

Reference Manual
00809-0100-4021, Rev BA
April 2003

Rosemount, the Rosemount logotype, and Hot Backup are registered trademarks of Rosemount Inc.
HART is a registered trademark of the HART Communication Foundation.
Teflon is a registered trademark of E.I. du Pont de Nemours & Co.
All other marks are the property of their respective owners.

Emerson Process Management
Rosemount Inc.
8200 Market Boulevard
Chanhassen, MN 55317 USA
T (U.S.) 1-800-999-9307
T (International) (952) 906-8888
F (952) 949-7001

Rosemount Temperature GmbH
Frankenstrasse 21
63791 Karlstein
Germany
T 49 (6188) 992 0
F 49 (6188) 992 112

www.rosemount.com

¢00809-0100-4021q¤
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