4690man

User Manual: 4690man

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- Models 2088, 2090P, 2090F Pressure Transmitters

Models 2088, 2090P,

and 2090F Pressure

Transmitters

00809-0100-4690

English

Rev. DA

Product Manual

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

Rosemount Sales Representative.

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: 1-800-999-9307 (

7:00 a.m. to 7:00 p.m. CST)

Technical support, quoting, and order-related questions.

North American 1-800-654-7768 (

24 hours a day – Includes Canada)

Response Center: Equipment service needs.

For equipment service or support needs outside the United States, contact your

local Rosemount representative.

Fisher-Rosemount satisfies all obligations coming from legislation

to harmonize product requirements in the European Union.

Rosemount Inc.

8200 Market Boulevard

Chanhassen, MN 55317 USA

Tel 1-800-999-9307

Fax (612) 949-7001

www.rosemount.com

1Models 2088, 2090P, and

2090F Pressure Transmitters

Rosemount Model 2088 Smart Pressure Transmitters may be protected by one or more U.S. and foreign

patents issued and pending.

Rosemount Models 2088, 2090P, and 2090F Pressure Transmitters may be protected by one or more of the

following U.S. Patent Nos.: 4,970,898 and 5,083,091. May depend on model. Other foreign patents issued

and pending.

Rosemount, the Rosemount logotype, and SMART FAMILY are registered trademarks of Rosemount Inc.

Coplanar is a trademark 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.

Neobee is a registered trademark of Stepan Chemical Company.

Hastelloy is a registered trademark of Haynes International.

Tri-Clamp is a registered trademark of Tri-Clover Inc. of the Alfa-Laval Group.

PMC is a registered trademark of Paper Machine Company.

Viton is a registered trademark of E.I. Du Pont de Numours & Co.

Cover Photo: 2088-006AB

Table of Contents

IMPORTANT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i

SECTION 1

Introduction

Using this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

SECTION 2

Commissioning the

Transmitter

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Commission: On the Bench or In the Loop . . . . . . . . . . . . . . . . . 2-2

Commissioning the Smart Transmitter . . . . . . . . . . . . . . . . . . . . 2-2

Set up the Smart Transmitter and the Communicator . . . . 2-2

Review Configuration Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

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

Check Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Process Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Basic Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

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

Output Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

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

Damping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Detailed Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Meter Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Burst Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Save, Recall, or Clone Configuration Data . . . . . . . . . . . . . . 2-6

Enable or Disable Local Span and Zero Buttons . . . . . . . . 2-6

Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Calibration Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Sensor Trim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Output Trim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Diagnostics and Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

Multidrop Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

SECTION 3

Installation

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

General Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Environmental Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Moisture and Corrosives . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Hazardous Locations Installations . . . . . . . . . . . . . . . . . . . . 3-3

Procedures and instructions in this manual 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 ( ). Refer to the

safety messages, listed at the beginning of each section, before performing

an operation preceded by this symbol.

IMPORTANT

Rosemount Model 2088/2090 Pressure Transmitters

Mechanical Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Impulse Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Access Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Model 2090P . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

Model 2090F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

Electrical Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

Field Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

Failure Mode and Security Jumpers . . . . . . . . . . . . . . . . . . . . . 3-12

Failure Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

Jumper Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

Transmitter Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

Zero and Span Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

Rerange Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

SECTION 4

Maintenance and

Troubleshooting

Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

Downscale Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

Disassembly Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

Reassembly Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

Returning Rosemount Products and/or Materials . . . . . . . . . . . 4-6

SECTION 5

Specifications and

Reference Data

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Functional Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Performance Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5

Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10

Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12

Tagging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12

APPENDIX A

LCD Meter LCD Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-1

Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-1

Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-1

Custom Meter Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-2

Diagnostic Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-3

APPENDIX B

Model 275 HART

Communicator

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-1

Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-1

Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-1

Connections and Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-4

Communicator Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-5

Fast Key Sequences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-7

Menus and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-7

Main Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-7

Online Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-8

Diagnostic Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-9

iii

Table of Contents

APPENDIX C

Model 2088

Low Power Option

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1

Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-1

Commissioning the Transmitter . . . . . . . . . . . . . . . . . . . . . . . . .C-1

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-1

Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2

Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-3

Selector Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-3

Potentiometer Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . .C-4

Setting the Zero . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-4

Setting the Span . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-5

Transient Protection Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-6

Installation Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-6

Transient Protection Board Installation . . . . . . . . . . . . . . . .C-6

Transient Protection Board Wiring . . . . . . . . . . . . . . . . . . . .C-6

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-7

Functional Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-7

Performance Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . C-7

APPENDIX D

Approval Drawings Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-1

APPENDIX E

European ATEX Directive

Information

Rosemount Model 2088/2090 Pressure Transmitters

Section

1-1

1Introduction

USING THIS MANUAL This manual provides information on commissioning, installing, and

operating the Rosemount Models 2088, 2090P, and 2090F Pressure

Transmitters. The manual is organized into the following sections:

Section 2: Commission the Transmitter

provides information on commissioning and operating the transmitters,

software functions, configuration parameters, and on-line variables.

Section 3: Installation

provides mechanical and electrical installation instructions.

Section 4: Maintenance and Troubleshooting

provides basic troubleshooting instructions, including sensing module

checkout, disassembly, and reassembly procedures.

Section 5: Specifications and Reference Data

provides functional specifications, physical specifications, performance

specifications, for the Model 2088, 2090P, and 2090F Pressure

Transmitters.

Appendix A: LCD Meter

provides operating instructions for the optional LCD meter.

Appendix B: Model 275 HART Communicator

contains a communicator overview, a HART Communicator menu tree

for the Model 2088 Smart, and a table of HART Communicator fast key

sequences. A table of diagnostic messages associated with this

communicator is also included.

Appendix C: Low Power Option

provides installation and calibration information specific to the Low

Power Option.

Appendix D: Transient Protection Option

provides installation, wiring, and specification information for the

transient protection option

Appendix E: Approval Drawings

provides the drawings necessary to install the transmitter in

hazardous location.

Appendix F: European ATEX Directive Information

provides information on European ATEX compliance.

SAFETY MESSAGES Procedures and instructions in this manual 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 ( ). Refer to the safety messages, listed at the

beginning of each section, before performing an operation preceded by

this symbol.

Rosemount Model 2088/2090 Pressure Transmitters

1-2

Section

2-1

2Commissioning the Transmitter

OVERVIEW This section contains information on commissioning the transmitter.

Commissioning involves reviewing configuration data, setting the 4 and

20 mA points, configuring the transmitter to recognize accessories such

as an LCD meter, and testing the transmitter output.

SAFETY MESSAGES This section contains procedures that require connecting a communicator

to the transmitter, or making connections in an explosive atmosphere.

The following safety messages apply to all procedures throughout this

section requiring cover removal and communicator or ammeter

connection to the transmitter terminal block. Keep the following safety

messages in mind whenever you perform an operation requiring cover

removal or the connection of a communicator or other device to a

measurement loop.

Warnings

Explosions could result in death or serious injury:

• Do not remove the transmitter covers in explosive atmospheres

when the circuit is alive.

• Before connecting a HART-based 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.

High voltage that may be present on leads could cause electrical shock:

• Avoid contact with leads and terminals.

Rosemount Model 2088/2090 Pressure Transmitters

2-2

COMMISSION: ON THE

BENCHORINTHELOOP

Commission the Model 2088 Transmitter before or after installation. It

may be useful to commission the transmitter on the bench before

installation to ensure proper operation, to familiarize yourself with

transmitter functionality, and to avoid exposing the transmitter

electronics to the plant environment.

Commissioning consists of :

• Reviewing configuration data

• Setting output units

• Setting the 4 and 20 mA points

• Configuring the transmitter for any non-standard accessories or

functions, and testing the transmitter output

COMMISSIONING THE

SMART TRANSMITTER

Set up the Smart

Transmitter and the

Communicator

To configure the smart transmitter on the bench, connect the

transmitter and the communicator as shown in Figure 2-1. To power

the transmitter you will need a power supply capable of providing 10.5

to 36.0 V dc and a meter to measure output current. To enable

communication, a resistance of at least 250 ohms must be present

between the communicator loop connection and the power supply. You

can connect the communicator leads at any termination point in the

signal loop, but it is most convenient to connect them to the terminals

labeled “COMM” on the terminal block.

After you connect the bench equipment as shown in Figure 2-1, turn on

the communicator by pressing the ON/OFF key. The communicator will

search for a HART-compatible device and will indicate when the

connection is made. If the connection is not made, the communicator

will indicate that no device was found.

REVIEW

CONFIGURATION DATA

Review all of the factory-set configuration data to ensure that it reflects

the needs of your application before operating the transmitter in an

actual installation.

Power

Supply

RL≥ 250 V

FIGURE 2-1. Connecting

a HART Communicator to

a Transmitter Loop.

The signal loop may be grounded

at any single point in the loop, or

may be left ungrounded

2088S-2088C02C

See “Safety Messages” on page 2-1 for complete warning information.

2-3

Commissioning the Transmitter

Review Review the transmitter configuration parameters set at the factory to

ensure accuracy and compatibility with your particular application.

After activating the review function, scroll through the data list to

check each variable. Refer to “Basic Setup” in this section of the

manual if a change to the transmitter configuration data is necessary.

CHECK OUTPUT Before performing other transmitter on-line operations, review the

digital output parameters to ensure that the transmitter is operating

properly and is configured to the appropriate process variables.

Process Variables The process variables for the Model 2088 provide the transmitter

output, and are continuously updated. The Process Variables menu

displays the following process variables:

•Pressure

• Percent Range

• Analog Output

BASIC SETUP From the Basic Setup menu you can configure the transmitter for certain

basic variables. In many cases, all of these variables are pre-configured at

the factory. Configuration may be required if your transmitter is not

configured or if the configuration variables need revision.

Tag The Tag variable is the easiest way to identify and distinguish between

transmitters in multi-transmitter environments. Use this variable to

label transmitters electronically according to the requirements of your

application. The tag you define 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.

Output Units The Unit command sets the desired primary variable units. Set the

transmitter output to one of the following engineering units:

•inH

•inHg

•ftH

• mmH20

•psi

•bar

•mbar

•inH

2O @ 4 °C

NOTE

After changing units, press SEND (F2) so the microprocessor will

recalculate the associated variables (4–20 mA points, for example). The

Model 2088 Smart recalculates all variables that depend on units. After

the transmitter recalculates the variables, you may change any of the

remaining parameters.

Rerange The Range Values command sets the 4 and 20 mA points (lower and

upper range values). Setting the range values to the limits of expected

readings maximizes transmitter performance; the transmitter is most

accurate when operated within the expected pressure ranges for your

application. In practice, you may reset the transmitter range values as

often as necessary to reflect changing process conditions.

HART Fast Keys 1, 5

HART Fast Keys 1, 1

HART Fast Keys 1, 3, 1

HART Fast Keys 1, 3, 2 •g/cm

•kg/cm

•Pa

•kPa

•torr

•atm

• mmH20 @ 4 °C

HART Fast Keys 1, 3, 3

See “Safety Messages” on page 2-1 for complete warning information.

Rosemount Model 2088/2090 Pressure Transmitters

2-4

NOTE

Regardless of the range points, the Model 2088 Smart will measure and

report all readings within the digital limits of the sensor. For example,

if the 4 and 20 mA points are set to 0 and 10 inH20, and the transmitter

detects a pressure of 25 inH20, it digitally outputs the 25 in H20

reading and a 250% percent of span reading. However, there may be up

to ±5.0% error associated with output outside of the range points.

You may use one of three methods to rerange the transmitter. Each

method is unique; examine all three closely before deciding which

method to use.

Method 1:Rerange Using the

Communicator Reranging using only the communicator is the easiest and most

popular way to rerange the transmitter. This method changes the

values of the analog 4 and 20 mA points independently without a

pressure input.

To rerange using only the communicator enter the fast-key sequence

above, select 1 Keypad input, and follow the on-line instructions. Or

enter the values directly from the HOME screen.

Method 2:Rerange Using the

Communicator and a Pressure

Source or Process Pressure

Reranging using the communicator and a pressure source or process

pressure is a way of reranging the transmitter when specific 4 and 20

mA points are not known. This method changes the values of the

analog 4 and 20 mA points. When you set the 4 mA point the span is

maintained; when you set the 20 mA point the span changes.

To rerange using the communicator and a pressure source or process

pressure enter the fast-key sequence above, select 2 Apply values, and

follow the on-line instructions.

Method 3:Rerange Using the

Local Zero and Span Buttons

and a Pressure Source or

Process Pressure

Reranging using the local zero and span adjustments and a pressure

source is a way of reranging the transmitter when specific 4 and 20 mA

points are not known and a communicator is not available. When you

set the 4 mA point the span is maintained; when you set the 20 mA

point the span changes.

Damping The Damping 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 your system. The default damping value is 0.50 seconds

and can be reset in fixed increments of 0.05, 0.10, 0.20, 0.40, 0.80, 1.60,

3.20, 6.40, 12.8, or 25.6 seconds.

HART Fast Keys 1. 3. 5

2-5

Commissioning the Transmitter

DETAILED SETUP

Meter Setup The Meter Type command allows you to configure the transmitter for use

with an LCD meter. Transmitters shipped without meters are set to

“NONE.” Change the meter settings as often as necessary to reflect

changing process or application conditions. To change the meter settings,

and thereby configure the transmitter to recognize the LCD meter, perform

the following procedure.

1. Select 1 Device setup, 3 Basic setup, 6 Meter type to prepare to

change the meter settings.

2. Select the appropriate variable configuration from the “Meter

type” screen, and press enter.

NOTE

Selecting “None” from the meter type screen will disable the meter.

3. Select SEND to download the new meter configuration

information to the transmitter.

For a more detailed description of the LCD meter features and

diagnostic messages, refer to “LCD Meter” on page A-1.

Burst Mode Burst Mode sets the transmitter to maintain digital contact with a

Digital Control System that has custom software to support burst

mode. When the Model 2088 Smart is configured for burst mode, it

provides faster digital communication from the transmitter to the

control system by eliminating the time required for the control system

to request information from the transmitter.

Burst mode is compatible with use of the analog signal. Because HART®

protocol features simultaneous digital and analog data transmission,

the analog value can drive other equipment in the loop while the control

system is receiving the digital information. Burst mode applies only to

the transmission of dynamic data (pressure and temperature in

engineering units, pressure in percent of range, and/or analog output in

mA), and does not affect the way other transmitter data is accessed.

Access to information other than dynamic transmitter data is obtained

through the normal poll/response method of HART communication. A

HART-based communicator or the control system may request any of

the information that is normally available while the transmitter is in

burst mode. Between each message sent by the transmitter, a short

pause allows the HART-based communicator or a control system to

initiate a request. The transmitter will receive the request, process the

response message, and then continue “bursting” the data

approximately three times per second.

HART Fast Keys 1, 3, 6

HART Fast Keys 1, 4, 3, 3, 3

Rosemount Model 2088/2090 Pressure Transmitters

2-6

Save, Recall, or Clone

Configuration Data

Data that was entered off-line can be stored in the communicator

memory and downloaded to other transmitters later. Data also can be

copied from a transmitter in order to be sent to other transmitters in a

process known as “cloning”. This is especially useful if you work with a

large number of transmitters that require the same configuration data.

Enable or Disable Local

Span and Zero Buttons

The Local Keys command allows you to enable or disable the local span

and zero buttons. Disabling the local keys will prevent unauthorized

reranging using the span and zero buttons, but will not prevent

reranging using the communicator. To prevent all changes to the

configuration data, use the transmitter security jumper (see

“Transmitter Security” on page 3-13).

CALIBRATION Calibrating the transmitter increases the precision of your

measurement system. You 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, in engineering units, dependent on

the sensor input. The trim functions allow you to make corrections to

the factory-stored characterization curve by digitally altering the

transmitter’s interpretation of the sensor input.

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.

Calibration Overview Complete calibration of the Model 2088 Smart Pressure Transmitter

involves one or more of the following tasks:

Configure the Analog Output Parameters

• Set Process Variable Units (Page 2-3)

• Rerange (Page 2-3)

• Set Output Type (Page 2-3)

• Set Damping (Page 2-4)

Calibrate the Sensor

• Full Trim (Page 2-8)

• Zero Trim (Page 2-7)

Calibrate the 4–20 mA Output

• Digital to Analog Trim (Page 2-9) or

• Scaled Digital to Analog Trim (Page 2-9)

Figure 2-2 illustrates the Model 2088 Smart Pressure Transmitter data

flow. This data flow can be summarized in four major steps:

1. A change in pressure is measured by a change in the sensor

output (Sensor Signal).

2. The sensor signal is converted to a digital format that can be

understood by the microprocessor (Analog-to-Digital Signal

Conversion).

3. Corrections are performed in the microprocessor to obtain a

digital representation of the process input (Digital PV).

4. The Digital PV is converted to an analog value

(Digital-to-Analog Signal Conversion).

HART Fast Keys left arrow, 3 (note)

HART Fast Keys 1, 4, 4, 1, 7

2-7

Commissioning the Transmitter

FIGURE 2-2. Transmitter Data Flow

with Calibration Options.

Deciding Which Trim

Procedure to Use To decide which trim procedure to use, you must first determine

whether the analog-to-digital section or the digital-to-analog section of

the transmitter electronics is in need of calibration. To do so, refer to

Figure 2-2 and perform the following procedure:

1. Connect a pressure source, a HART communicator, and a digital

readout device to the transmitter.

2. Establish communication between the transmitter

and the communicator.

3. Apply pressure (100 in H20, for example).

4. Compare the applied pressure to the Process Variable (PV) line on

the Communicator Online Menu. If the PV reading on the

communicator does not match the applied pressure, and you are

certain your test equipment is accurate, perform a sensor trim.

5. Compare the Analog Output (AO) line on the communicator online

menu to the digital readout device. If the AO reading on the

communicator does not match the digital readout device, and you are

certain your test equipment is accurate, perform an output trim.

Sensor Trim You can trim the sensor using either the full trim or the zero trim

function. The trim functions vary in complexity, and their use is

application-dependent. Both alter the transmitter’s interpretation of

the input signal.

Zero Trim A Zero Trim is a single-point adjustment. It is useful for compensating

for mounting position effects, and is most effective when performed

with the transmitter installed in its final mounting position. Since this

correction maintains the slope of the characterization curve, it should

not be used in place of a full trim over the full sensor range.

NOTE

Use full trim on absolute transmitters; do not use zero trim.

Transmitter Electronics Module

Microprocessor

Digital PV

Sensor

Input Device Output Device

20.00 mA

2088s:PT-4763

1➡Device Setup

Online

2 PV 100.00 inH2O

3 AO 20.00 mA

4 LRV 0.00 inH2O

5 URV 100.00 inH2O

Transmitter Ranged 0 to 100 inH2O

Input

Pressure

Sensor

Signal

Analog Output

HART

Communicator

NOTE

Value on PV line should equal

the input pressure. Value on

AO line should equal the

output device reading.

1151-1151F05B

HART Fast Keys 1, 2, 3, 3, 1

Rosemount Model 2088/2090 Pressure Transmitters

2-8

To calibrate the sensor using the Zero Trim function, perform the

following procedure.

1. Vent the transmitter and attach a communicator to the

measurement loop.

2. From the communicator main menu select 1 Device setup,

2 Diagnostics and service, 3 Calibration, 3 Sensor trim, 1 Zero

trim to prepare to adjust the zero trim.

NOTE

The transmitter must be within 3% of true zero (zero based) in order to

calibrate using the zero trim function.

3. Follow the commands provided by the communicator to complete

the adjustment of the zero trim.

Full Trim A Full Trim is a two-point sensor calibration where two end-point

pressures are applied, and all output is linearized between them. You

should always adjust the low trim value first to establish the correct

offset. Adjustment of the high trim value provides a slope correction to

the characterization curve based on the low trim value. The factory-

established characterization curve is not changed by this procedure.

The trim values allow you to optimize performance over your specified

measuring range at the calibration temperature.

To calibrate the sensor using the Full Trim function, perform the

following procedure.

1. Assemble and power the entire calibration system including a

transmitter, communicator, power supply, pressure input source,

and readout device.

NOTE

Use a pressure input source that is at least three times more accurate

than the transmitter, and allow the input pressure to stabilize for 10

seconds before entering any values.

2. From the communicator main menu select 1 Device setup,

2 Diagnostics and service, 3 Calibration, 3 Sensor trim, 2 Lower

sensor trim to prepare to adjust the lower trim point.

NOTE

Select pressure input values so that the low and high values are equal

to or outside the 4 and 20 mA points. Do not attempt to obtain reverse

output by reversing the high and low points. The transmitter allows

approximately a 5% URL deviation from the characterized curve

established at the factory.

3. Follow the commands provided by the communicator to complete

the adjustment of the lower value.

4. Repeat the procedure for the upper value, replacing 2 Lower

sensor trim with 3 Upper sensor trim in Step 2.

Output Trim The Output Trim commands allow you to alter the transmitter’s

conversion of the input signal to a 4–20 mA output (see Figure 2-2 on

page 2-7). Adjust the analog output signal at regular intervals to

maintain precision. You can trim the transmitter output using either

the digital to analog trim or the scaled digital to analog trim function.

HART Fast Keys 1, 2, 3, 3

2-9

Commissioning the Transmitter

Digital to Analog Trim To perform a Digital-to-Analog Trim, perform the following procedure.

1. From the HOME screen, select 1 Device setup, 2 Diag/Service, 3

Calibration, 4 D/A trim. Select “OK” to after you set the control loop

to manual.

2. Connect an accurate reference meter to the transmitter at the

“Connect reference meter” prompt. To do so, connect the positive

lead to the positive terminal and the negative lead to the test

terminal in the transmitter terminal compartment, or shunt the

transmitter power through the reference meter at some point.

3. Select “OK” after connecting the reference meter.

4. Select “OK” at the “Setting fld dev output to 4 mA” prompt.

The transmitter outputs 4.00 mA.

5. Record the actual value from the reference meter, and enter it at

the “Enter meter value” prompt.

The communicator prompts you to verify whether or not the

output value equals the value on the reference meter.

6. Select 1 Yes if the reference meter value equals the transmitter

output value, or 2 No if it does not.

If you select 1 Yes, proceed to Step 7.

If you select 2 No, repeat Step 5.

7. Select “OK” at the “Setting fld dev output to 20 mA” prompt, and

repeat Steps 5 and 6 until the reference meter value equals the

transmitter output value.

Select “OK” after you return the control loop to automatic control.

Scaled Digital to Analog Trim The Scaled Digital-to-Analog Trim command matches the 4 and 20 mA

points to a user-selectable reference scale other than 4 and 20 mA (1 to

5 volts if measuring across a 250 ohm load, or 0 to 100 percent if

measuring from a DCS, 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.

NOTE

Use a precision resistor for optimum accuracy. If you add a resistor to

the loop, ensure that the power supply is sufficient to power the

transmitter to a 20 mA output with the additional loop resistance.

HART Comm. 1, 2, 3, 2, 1

Model 268 F4, F4, F3, F1, F1

HART Comm. 1, 2, 3, 2, 2

Model 268 F4, F4, F3, F1, F2

Rosemount Model 2088/2090 Pressure Transmitters

2-10

DIAGNOSTICS

AND SERVICE

Test Device The Test Device command initiates a more extensive diagnostic routine

than that performed continuously by the transmitter. The transmitter

test routine can identify an electronics failure. If the transmitter test

detects a problem, the communicator displays messages to indicate the

source of the problem.

Loop Test 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 a reference meter to the transmitter. To do so, either

connect the meter to the test terminals on the transmitter terminal

block, or 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 Diagnostics and

Service, 2 Loop Test, to prepare to perform a loop test.

3. Select “OK” after you set the control loop to manual.

The communicator displays the loop test menu.

4. Select a discreet milliamp level for the transmitter to output. At

the “Choose analog output” prompt, select 1 4mA, 2 20mA, or select

3 other to manually input a value between 4 and 20 milliamps.

5. Check the current meter installed in the test loop to verify that it

reads the value you commanded the transmitter to output. If the

readings do not match, 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 you to choose another output value.

MULTIDROP

COMMUNICATION

Multidropping transmitters 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.

Note that Burst Mode Operation is not compatible with multidrop

communications.

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. Multidrop

installations are not recommended where intrinsic safety is a

requirement. Communication with the transmitters can be

accomplished with commercially available Bell 202 modems and a host

implementing the HART protocol. Each transmitter is identified by a

unique address (1-15) and responds to the commands defined in the

HART protocol.

Figure 2-3 shows a typical multidrop network. This figure is not

intended as an installation diagram. Contact Rosemount product

support with specific requirements for multidrop applications.

HART Fast Keys 1, 2, 1, 1

HART Fast Keys 1, 2, 2

2-11

Commissioning the Transmitter

FIGURE 2-3. Typical

Multidrop Network.

HART-based communicators can test, configure, and format a

multidropped transmitter the same way as a transmitter in a standard

point-to-point installation.

NOTE

The transmitter 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, you must change the transmitter

address to a number from 1 to 15. This change deactivates the 4–20 mA

analog output, locking it to 4 mA. It also disables the failure mode alarm

signal, which is controlled by the upscale/downscale jumper position.

Changing a Transmitter Address To change the address of a multidropped transmitter, follow these fast

key sequences. To activate multidrop communication, the transmitter

address must be changed to a number from 1 to 15.

Communicating with a

Multidropped Transmitter To communicate with a multidropped transmitter for the purpose of

testing, configuring, or formatting.

Polling a Multidropped Loop Polling a multidropped loop determines the model, address, and

number of transmitters on the given loop.

NOTE

The Model 275 HART Communicator requires you to use the Utility

Menu to perform an auto poll. This menu is available from the Main

Menu of the HART Communicator. Press the left arrow to move from

the Online Menu to the Main Menu. Press 4 from the Main Menu to

access the Utility Menu.

Bell 202

Modem

Power

Supply

RS-232-C

3051-0087A

HART Fast Keys 1, 4, 3, 3, 1

HART Fast Keys 1, 4, 3, 3, 2

HART Fast Keys Left Arrow, 4, 1, 1

Rosemount Model 2088/2090 Pressure Transmitters

2-12

Section

3-1

3Installation

OVERVIEW This section is designed to guide you through a successful Models 2088,

2090F, or 2090P Transmitter installation. Starting with an installation

flowchart, this section contains information on installation

considerations and transmitter options. Dimensional drawings are also

included in this section.

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 could result in death or serious injury:

• Do not remove the transmitter cover in explosive atmospheres

when the circuit is alive.

• Before connecting a HART-based 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.

High voltage that may be present on leads could cause electrical shock:

• Avoid contact with leads and terminals.

Use appropriately rated sanitary clamps and gaskets during installation. The maximum

working pressure of the clamp and gasket must be greater than or equal to the working

pressure range of the transmitter. Failure to use proper clamps and gaskets can cause

process leaks and can result in death or serious injury.

Rosemount Model 2088/2090 Pressure Transmitters

3-2

FIGURE 3-1. Installation Flowchart.

Check for Leaks

(Process Connections)

Zero Trim Transmitter for

Mounting Effects

Yes

Check Jumper or

Switches

(Smart Only)

Wire

Transmitter

Power

Transmitter

Zero

Transmitter

DONE

Repeat Steps until

Calibrated

Mount

Transmitter

Apply Pressure

Refer to

Troubleshooting

Section

Within

Specifications?

VERIFY

START HERE

Bench

Calibration?

FIELD INSTALL

Smart Analog

Set Output Type

Check Configuration

(See Chapter 2)

Set Range Points

Set Units

(See Chapter 2)

Set Damping Analog

Smart

Confirm Transmitter

Configuration

Within

Specifications?

Yes

Check Configuration

(See Chapter 3)

Within

Specifications?

Yes

ADJUST ANALOG

ZERO/SPAN

(See Chapter 3)

Perform Sensor and/or

Output Trim

3-3

Installation

GENERAL

CONSIDERATIONS

The accuracy of the pressure measurement depends on proper

installation of the transmitter and impulse piping. The piping between

the process and transmitter must accurately transmit pressure to the

transmitter. Mount the transmitter close to the process and use a

minimum of impulse piping to achieve the best accuracy. Keep in mind,

however, the need for convenient access, safety of personnel, practical

field calibration, and a suitable transmitter environment. In general,

install the transmitter to minimize vibration, shock, and temperature

fluctuations.

ENVIRONMENTAL

CONSIDERATIONS

Temperature Mount the transmitter in a manner that minimizes variations in

ambient temperature.

Moisture and Corrosives The transmitter is designed to resist attack by moisture and corrosives.

The electronics module is fully encapsulated and mounted in a

compartment that is sealed from the power-side conduit entries. O-ring

seals protect both compartments when the covers are installed.

In humid environments, it is possible for moisture to accumulate in the

conduit lines and reach the terminal compartment of the transmitter

housing. To prevent moisture from entering the terminal compartment,

mount the transmitter at a high point in the conduit run, if possible.

Also, remove the terminal compartment cover periodically and inspect

the terminals for moisture and corrosion.

Hazardous Locations

Installations

Models 2088, 2090P, and 2090F transmitters are designed with

explosion-proof electronics enclosures and circuitry that complies with

intrinsic safety requirements and non-incendive operation. Individual

transmitters are clearly tagged with approvals. Refer to Section 5:

Specifications and Reference Data for a complete list of available

approvals. To maintain certified ratings for installed transmitters,

install with applicable installation codes and approval drawings.

NOTE

Once a device labeled with multiple approval types is installed, it

should not be reinstalled using any other approval types. Permanently

mark the approval label to distinguish it from unused approval types.

Do not apply torque directly to the electronics housing. Rotation

between the electronics housing and the process connection can

damage the electronics. To avoid damage, apply torque only to the

hex-shaped process connection.

Electronics

Housing

Process

Connection

2088-2088B02G

Rosemount Model 2088/2090 Pressure Transmitters

3-4

MECHANICAL

CONSIDERATIONS

Mounting

Model 2088 The Model 2088 Smart Transmitter weighs approximately 2.44 lb

(1,11 kg). The Model 2088 Analog Transmitter weighs approximately

1.9 lb (0,86 kg). In many cases, its compact size and light weight makes it

possible to mount the Model 2088 directly to the impulse line without

using an additional mounting bracket. When this is not desirable, mount

directly to a wall, panel, or two-inch pipe using the optional mounting

bracket (see Figure 3-2).

The Model 2088 also offers several process connections. Use your plant-

approved thread sealant to ensure a leak-proof connection.

Model 2090P The Model 2090P is designed to be mounted directly to the process pipe

using a weld spud (see Figure 3-7). Mount the transmitter using an

existing weld spud, or install a new one using the instructions on

page 3-7.

Model 2090F The Model 2090F is designed to be mounted directly to the process pipe

using a standard sanitary fitting (see Figure 3-8). The transmitter is

available with either a 1.5- or 2-inch Tri-Clamp® connection.

FIGURE 3-2. Transmitter Mounting

Configurations with Optional Bracket.

2-inch U-Bolt

for Pipe Mounting

NOTE

Dimensions are in in. (mm). 1.30 (33)

2.81 (71)

PIPE MOUNTING PANEL MOUNTING

Mounting bracket ordering code B4, and optional block and bleed valve.

5/16×1½Bolts

for Panel Mounting

(not supplied)

2088S-2088A04A, B04A, C04A; 2088-2088A04A, A04B

5/16×1½Bolts

for Panel Mounting

(not supplied)

3.9 (100) 5.0 (125)

4.3 (110)

6.0 (150)

2.5

(63)

3.6

(90)

5.0

(139)

1.25 (32)

HEX

3.0 (80)

3.9

(100)

6.2

(160)

2.8

(70)

4.75 (120)

7.0 (175)

3-5

Installation

Impulse Piping Impulse piping configurations depend on specific measurement

conditions. Use the following information and Figure 3-3 as a guideline

when installing impulse piping.

Liquids: Make the line tap on the side of the pipe to prevent sediment

deposits from plugging the impulse line or transmitter. Mount the

transmitter level with or below the tap so gases vent into the

process line.

Gases: Make line taps on either the top or the side of the process line.

Mount the transmitter level with or above the line tap so liquids

drain into the process line.

Steam: Make line taps in the side of the process line. Mount the

transmitter below the line tap to ensure that the impulse line

remains filled with condensate.

NOTE

Installing a “T”-connection with a shut-off valve in the impulse line

between the transmitter and the valve to the process line will allow you

to vent the transmitter to atmosphere, thereby enabling calibration

without removing the transmitter.

NOTE

In steam or other high-temperature services, the temperature at the

process connection must not exceed the process temperature limit of the

transmitter, which is 250 °F (121 °C).

In steam service above 250 °F (121 °C), fill impulse lines with water to

prevent steam from contacting the transmitter. Condensate chambers

are not necessary since the volumetric displacement of the Model 2088

is negligible.

GAS

SERVICE

LIQUID OR STEAM

SERVICE

2088-2088A01A, C, B

GAS OR LIQUID

SERVICE

FIGURE 3-3. Transmitter

Mounting Configurations for

Liquids, Gases, and Steam.

Rosemount Model 2088/2090 Pressure Transmitters

3-6

Access Requirements When choosing a mounting location and position, take into account the

need for access to the transmitter.

Make wiring terminations through the conduit openings at the top of

the electronics housing. The field terminal side of the transmitter is

clearly marked on the transmitter neck. Test terminals are

incorporated on the terminal block; you do not need access to the

electronics compartment to perform calibration procedures.

The transmitter electronics compartment contains the electronics

module with failure mode and security jumpers, and the optional LCD

meter. Consider the need for access to both compartments when

installing the transmitter. Refer to Figure 3-4 for transmitter

dimensional drawings.

FIGURE 3-4. Smart Transmitter Dimensional Drawings.

2088S-2088A07A, B07A

M20

1.5 Female (CM20), PG 13.5, and G ½Female (PF ½) also available as options.

†

DIN 16288 G ½Male, RC ½Female (PT ½), and M20

1.5 Male (CM20) also available .

23½–14 NPT*

Conduit

Connection

Terminal

Connections

5.0 (125)

Optional Meter Cover

Transmitter Circuitry

Certifications Tag

23¼–20 UNC-2B

Mounting Holes

½–14 NPT Female†Process Connection

4.3 (110) Max.

3.9 (100)

0.75 (20)

Clearance for

Cover Removal

4.7

(120)

5.4

(140)

Model 2088

5.1(130)

Typical

2.38

(60)

2090-2088A07P, B07P

5.0 (125)

Optional Meter Cover

Transmitter Circuitry

Terminal

Connections

M44 31.25

Weld Spud

23 ¼–20 UNC–2BX

Depth 0.60

Mounting Holes

4.7

(120)

3.9 (100)

0.82

(21)

Weld Spud

Certification Tag

4.3 (110)

Model 2090P (1.5-in.)

Vessel Wall

NOTE: Dimensions are in in. (mm).

3-7

Installation

Model 2090P Installing the Model 2090P transmitter involves attaching a weld spud

to the tapped process vessel, attaching the transmitter to the weld

spud, and making electrical connections. If you intend to use an

existing weld spud, proceed to the transmitter section of this

installation procedure.

NOTE

The Model 2090P Isolating Diaphragm can be mounted flush with the

inside diameter of any vessel larger than three inches in diameter.

Nameplate

3.9

(100)

2X ¼–20 UNC–2BX 0.60 Deep

Mounting Bracket Holes

4.7 (140)

Terminal

Connections Transmitter Circuitry Side

Optional Meter Cover

5.0 (125)

Weld Spud

1.0 (25.4)

Vessel Wall

4.3 (110)

1.05 (26.6)

1.32 (33,4)

5.75 (146)

3X 5/16–18 UNC

Mounting Holes for

Rotational Mounting

0.7 (17,8)

O-ring (Viton®standard)

External Zero/Span (under Nameplate)

1.03 (26.2)

Model 2090P Compatible with 1-in. PMC

Process Connection

2090-2090A07A, 2090B07A

1½ or 2-in. Tri-Clamp Connection

23 ¼–20 UNC–2BX 0.60

Deep Mounting Holes

4.7

(120)

3.9 (100)

2090-2088A07F, 2088B07F

M20

1.5 Female (M20) and PG 13.5 also available.

NOTE:Dimensions are in inches (millimeters).

Optional Meter Cover

Transmitter Circuitry Side

Terminal

Connections

5.0 (125)

4.3 (110)

Certifications Tag

Model 2090F

Installation of the weld spud should be performed by a skilled welder using a

TIG welder. Improper installation may result in weld spud distortion.

Rosemount Model 2088/2090 Pressure Transmitters

3-8

Weld Spud 1. Using the appropriate size hole saw, cut a hole in the process

vessel to accept the weld spud. The diameter for a weld spud with

heat isolator groove is 2.37 inch (60 mm); when compatible with

1-in. PMC® process connection style spud, diameter is 1.32 in.

(33,4 mm). The hole should produce a tight, uniform fit when

coupled with the weld spud.

2. Bevel the edge of the vessel hole to accept filler material (see

Figure 3-5).

3. Remove the weld spud from the transmitter and remove the

Teflon® gasket from the weld spud.

4. Position the weld spud in the vessel hole, place heat sink and tack

spud in place using the welding sequence shown in Figure 3-5.

Cool each section with a wet cloth before proceeding to the next

section.

5. Weld the spud in place using 0.030 to 0.045 in. (0,762 to

1,143 mm) stainless steel rod as filler in the bevelled area. Using

between 100 and 125 amps., adjust the amperage for 0.080 in.

(2,032 mm) penetration.

Transmitter 1. After the weld spud has cooled, remove the heat sink and install

the Teflon gasket into the weld spud. Ensure that the gasket is

properly positioned within the weld spud; improper placement

could cause a process leak (see Figure 3-6).

2. Position the transmitter into the spud and begin to engage the

threads. Rotate the transmitter prior to seating the threads

completely to enable access to the housing compartments, the

conduit entry, and the local indicator.

3. Hand tighten the transmitter using the knurled retaining ring,

then snug an additional 1/8 turn with adjustable pliers.

IMPORTANT

Do not over-tighten the retaining ring. A spanner wrench (P/N 02088-

0193-0001) hole is located on the knurled portion of the retaining ring

to assist in transmitter removal if it is over-tightened.

Excessive heat will distort the weld spud. Weld in sections, as shown in Figure

3-5, cooling each section with a wet cloth. Allow adequate cooling between

passes.

To reduce the chances of distorting the weld spud (for 1.5-in. connection), use

a heat sink—Rosemount Part Number 02088-0196-0001.

3-9

Installation

FIGURE 3-5. Installing the Weld Spud.

FIGURE 3-6. Teflon Gasket Placement.

FIGURE 3-7. Model 2090P Mounting

Configuration Using a Weld Spud.

PREPARING THE VESSEL HOLE

2090-0208E07B

Process

Vessel

Bevelled

Edge

Weld Spud

100–125 Amps

recommended

308L SST

2.37 (60)

Code “C” in Model Structure or

P/N 02088-0295-0003

WELDING SEQUENCE

Heat Isolation

Grooves

Teflon Gasket

Nameplate

23¼–20

UNC–2BX

Depth 0.60

Mounting

Holes

Bevelled Edge

Vessel

Wall

Weld Spud

DETAIL OF WELD SPUD

Vessel Wall

2090-2088B07P, 2088E07B

100–125 Amps

recommended

Weld Spud

2090-2088E07A

Rosemount Model 2088/2090 Pressure Transmitters

3-10

Model 2090F The Model 2090F sanitary pressure transmitter is designed to be

installed directly to a sanitary fitting. The transmitter is available with

either a 1.5- or 2-inch clamp connection.

When installing the transmitter to the sanitary fitting it is important to

use the proper sanitary clamp and gasket (user-supplied). Check the

clamp and gasket specifications before installing. Refer to Standard

Sanitary Clamp Models in Figure 3-8 for a list of standard sanitary

clamps, their respective maximum pressure ranges, and the

recommended torque to be applied when mounting.

FIGURE 3-8. Model 2090F Mounting

Configuration Using a Sanitary Fitting.

Nameplate

1.5- or 2-in.

Tri-Clamp

Connection

1.1 (28)

Typical

User Supplied

Gasket and

Clamp

DETAIL OF SANITARY

CONNECTION

STANDARD SANITARY CLAMP MODELS

Clamp Model psi @ 70 °F

(kPa @ 21 °C) psi @ 250 °F

(kPa @ 121 °C) Recommended

Torque

13 MHHM 1.5-inch

13 MHHM 2-inch

450 (3 103)

500 (3 448)

250 (1 724)

250 (1 724) 25 in-lb (2.8 N•m)

13 MHHS 1.5-inch

13 MHHS 2-inch

600 (4 138)

550 (3 793)

300 (2 069)

275 (1 896) 25 in-lb (2.8 N•m)

13 MHP 1.5-inch

13 MHP 2-inch

1500 (10 345)

1000 (6 896)

1200 (8 276)

800 (5 517) 20 ft-lb (27 N•m)

CONNECTION SIZE

* Dimensions are in inches (millimeters)

Connection

Size* A B

1.50 (38) 1.99 (50) 1.71 (43)

2.00 (51) 2.52 (64) 2.22 (56)

2088-2088B07D, 2090-2088D07A

Mounting

Hole

See “Safety Messages” on page 3-1 for complete warning information.

3-11

Installation

ELECTRICAL

CONSIDERATIONS

The wiring terminations on the Models 2088, 2090P, and 2090F are

located in the side of the transmitter housing marked “FIELD

TERMINALS.” Access to these terminations is required during

installation and may be necessary during periodic calibration of the

transmitter.

Power Supply The dc power supply should provide power to the transmitter with less

than one percent ripple. The total loop resistance load is the sum of the

resistance of the signal wires and the resistance load of the controller,

indicator, and other pieces of equipment in the loop. Note that the

resistance of intrinsic safety barriers, if used, must be included. Figure

3-9 shows the transmitter power supply load limitations.

FIGURE 3-9. Transmitter

Load Limitations.

Field Wiring All power to the transmitter is supplied over the signal wiring. Signal

wiring need not be shielded, but use twisted pairs for best results. Do

not run unshielded signal wiring in conduit or open trays with power

wiring, or near heavy electrical equipment. To power the transmitter,

connect the positive power lead to the terminal marked “PWR/COMM+”

and the negative power lead to the terminal marked “–” (see Figure

3-10). Tighten the terminal screws to ensure that proper contact is

made. Avoid contact with the leads and the terminals. No additional

power wiring is required.

To connect test equipment for monitoring the output of the Model 2088

Smart during maintenance procedures, connect one lead to the terminal

labeled “TEST+” and the other lead to the terminal labeled “–” (see

Figure 3-10). Avoid contact with the leads and the terminals.

Signal wiring may be grounded at any one point on the measurement

loop, or it may be left ungrounded. The negative side of the power

supply is a recommended grounding point. The transmitter case may be

grounded or left ungrounded.

Conduit connections at the transmitter should be sealed to prevent

moisture accumulating in the field terminal side of the transmitter

housing. Also, install wiring with a drip loop with the bottom of the drip

loop lower than the conduit connection of the transmitter housing.

(1) For CENLEC EX ia Approval, power supply must not exceed 30 volts.

NOTE

Minimum load impedance for Output Code N is 100 kilohms.

Load (Ohms)

Operating

Region

Max. Load = 45.4 (Power Supply Voltage) –10.5

10.5 15 20 25 30(1) 36

Power Supply (dc Volts)

1158

1000

800

600

400

200

2088-0098A

See “Safety Messages” on page 3-1 for complete warning information.

Rosemount Model 2088/2090 Pressure Transmitters

3-12

FIGURE 3-10. Model 2088 Smart

Signal Wiring Terminals.

FAILURE MODE AND

SECURITY JUMPERS

Failure Mode As part of normal operation, the Model 2088/2090 Smart Pressure

Transmitter continuously monitors its own operation. This automatic

diagnostic routine is a timed series of checks repeated continuously. If

the diagnostic routine detects a failure in the transmitter, the

transmitter drives its output either below or above specific values

depending on the position of the failure mode jumper or switch.

The values to which 4–20 mA transmitters drive their output in failure

mode depend on whether they are factory-configured to standard or

NAMUR-compliant operation. The values for each are as follows:

Standard Operation

Linear output: 3.9 ≤ I ≤ 20.8 mA

Fail low: I ≤ 3.75 mA

Fail high: I ≥ 21.75 mA

NAMUR-Compliant Operation (Option Code C4)

Linear output: 3.8 ≤ I ≤ 20.8 mA

Fail low: I ≤ 3.6 mA

Fail high: 21.0 ≤ I ≤ 23.0 mA

To determine the failure mode configuration of your transmitter, review

the failure mode options using a Model 275 HART Communicator.

NOTE

The failure mode configuration, whether standard or NAMUR-

compliant, is configured at the factory and can not be changed in

the field.

Positive

Negative

Test

2088S-2088C02D

See “Safety Messages” on page 3-1 for complete warning information.

3-13

Installation

Jumper Locations Without a meter installed

The failure mode alarm jumper is located on the front side of the

electronics module just inside the electronics housing cover and is

labeled ALARM (See Figure 3-11). Do not remove the transmitter

cover in explosive atmospheres when the circuit is alive. Both covers

must be fully engaged to meet explosion-proof requirements.

With a meter installed

The failure mode alarm jumper is located on the LCD faceplate in the

electronics module side of the transmitter housing and is labeled

ALARM (See Figure 3-11). Do not remove the transmitter cover in

explosive atmospheres when the circuit is alive. Both covers must be

fully engaged to meet explosion proof requirements.

Transmitter Security After commissioning the transmitter, you may wish to protect the

configuration data from unwarranted changes. The transmitter is

equipped with a security jumper that can be positioned to prevent

changes to the configuration data (see Figure 3-11). The circuit board is

electrostatically sensitive. Observe handling precautions for static-

sensitive components to avoid circuit board damage.

When the transmitter security jumper is in the “ON” position, the

transmitter will not accept any “writes” to its memory. This means that

configuration changes (such as digital trim and reranging) cannot take

place when the transmitter security is on. To reposition the jumper, use

the following procedure.

1. If the transmitter is installed, secure the loop, and remove power.

2. Remove the housing cover opposite the field terminal side. Do not

remove the instrument cover in explosive atmospheres when the

circuit is alive.

3. Reposition the jumper. Avoid contact with the leads and the

terminals. Refer to Figure 3-11 for the location of the jumper and

the ON and OFF positions.

4. Reattach the transmitter cover. The cover must be fully engaged

to comply with explosion-proof requirements.

FIGURE 3-11. Transmitter Alarm and

Security Jumper Locations.

NOTE

If either the alarm or security jumper is dislodged or removed from its

position the transmitter reverts to default alarm or security settings of:

Alarm: Output high; Security: Off

Alarm

Security

Alarm and Security Jumpers Without Meter Alarm and Security Jumpers With Meter

Alarm

Security

2088S-2088A05A, 2088A05C

See “Safety Messages” on page 3-1 for complete warning information.

Rosemount Model 2088/2090 Pressure Transmitters

3-14

ZERO AND SPAN

ADJUSTMENTS

The smart Model 2088 is equipped with local zero and span adjustment

buttons. The buttons are located on the top of the transmitter beneath

the certifications label. Use the zero and span adjustments to set the

4 and 20 mA output points.

Rerange Procedure To rerange the transmitter using the span and zero buttons, perform

the following procedure.

1. Loosen the screw holding the nameplate on top of the transmitter

housing and rotate the nameplate to expose the zero and span

buttons (see Figure 3-12).

2. Using a pressure source with an accuracy three to ten times the

desired calibrated accuracy, apply a pressure equivalent to the

lower range value.

3. To set the 4 mA point, press and hold the zero button for at least

two seconds, then verify that the output is 4 mA. If a meter is

installed, it will display ZERO PASS.

4. Apply a pressure equivalent to the upper range value.

5. To set the 20 mA point, press and hold the span button for at least

two seconds, then verify that the output is 20 mA. If a meter is

installed, it will display SPAN PASS.

NOTE

If the transmitter security jumper is in the “ON” position, or if the local

zero and span adjustments are disabled through the software, you will

not be able to make adjustments to the zero and span using the local

buttons. Refer to Figure 3-11 on page 3-13 for the proper placement of

the transmitter security jumper.

FIGURE 3-12. Local Zero

and Span Adjustments.

Disabling the Zero

andSpanAdjustments After you rerange the transmitter using the span and zero adjustments,

you may wish to disable the adjustments to prevent further reranging. To

disable the span and zero adjustments, activate the transmitter security

jumper (see Transmitter Security on Page 3-13).

NOTE

The transmitter security jumper prevents any changes to the

transmitter configuration data. The software lockout sequence only

disables the local span and zero adjustment buttons.

2088S-2088A02A

Span and Zero Adjustment Buttons

See “Safety Messages” on page 3-1 for complete warning information.

3-15

Installation

Rosemount Model 2088/2090 Pressure Transmitters

3-16

Section

4-1

4Maintenance and

Troubleshooting

This section contains the following transmitter maintenance and

troubleshooting information:

• Troubleshooting

• Disassembly Procedure

• Reassembly Procedure

• Return of Materials

• Replacement Parts

SAFETY MESSAGES This section contains procedures that require connecting a communicator

to the transmitter, or making connections in an explosive atmosphere.

The following safety messages apply to all procedures throughout this

section requiring cover removal and communicator or ammeter

connection to the transmitter terminal block. Keep the following safety

messages in mind whenever you perform an operation requiring cover

removal or the connection of a communicator or other device to a

measurement loop.

The following performance limitations may inhibit efficient or safe operation.

Critical applications should have appropriate diagnostic and backup systems

in place.

Pressure transmitters contain an internal fill fluid. It is used to transmit the

process pressure through the isolating diaphragms to the pressure sensing

element. In rare cases, oil leak paths in oil-filled pressure transmitters can be

created. Possible causes include: physical damage to the isolator

diaphragms, process fluid freezing, isolator corrosion due to an incompatible

process fluid, etc.

A transmitter with an oil fill fluid leak can continue to perform normally for a

period of time. Sustained oil loss will eventually cause one or more of the

operating parameters to exceed published specifications while a small drift in

operating point output continues. Symptoms of advanced oil loss and other

unrelated problems include:

• Sustained drift rate in true zero and span or operating

point output or both.

• Sluggish response to increasing or decreasing pressure or both.

• Limited output rate or very nonlinear output or both.

• Change in output process noise.

• Noticeable drift in operating point output.

• Abrupt increase in drift rate of true zero or span or both.

• Unstable output.

• Output saturated high or low.

Rosemount Models 2088/2090 Pressure Transmitters

4-2

FIGURE 4-1. Range of Output.

Unauthorized procedures or parts can affect product performance and the

output signal used to control a process, and can cause death or serious

injury. Use only the procedures and new parts specifically referenced in

this manual. Direct any questions concerning these procedures or parts to

Rosemount Inc.

Explosions can result in death or serious injury. Do not remove the

instrument cover in explosive environments while power is supplied to

transmitter.

Mishandling products exposed to a hazardous substance can cause death

or serious injury. If the product being returned was exposed to a

hazardous substance as defined by OSHA, a copy of the required Material

Safety Data Sheet (MSDS) for each hazardous substance identified must

be included with the returned goods.

3.75 for Smart(1)

20.8

3.9 Normal Operating Range 20

Hardware Alarm

Process Variable

OutofRange

Fail Low Fail High

Smart only

21.75

(1) Failure mode for output code M is ≤1V.

(2) Above Values are for Standard Failure Mode. NAMUR compliant values are different than above.

4-3

Maintenance and Troubleshooting

TROUBLESHOOTING

TABLE 4-1. Smart Transmitter Troubleshooting and Corrective Actions.

Symptom Potential Source Corrective Action

High Output Impulse Piping, • Check for blockage in the impulse line.

• Check to ensure that the blocking valve is fully open.

• Check for trapped gas in a liquid line, or trapped liquid in a gas line.

• Check to ensure that the density of the fluid in the impulse line is unchanged.

• Check for sediment in the transmitter process connection. If you find sediment,

flush the process connection clean with water or an appropriate solvent.

Do not attempt to scrape sediment free; doing so could puncture the thin

isolating diaphragm and destroy the transmitter.

• Check for frozen process fluid in the process connector.

Electronics • Check test equipment.

• Perform full sensor trim.

Power Supply • Check the output voltage of the power supply at the transmitter.(1)

(1) A transmitter with Output Code S should have 10.5–36.0 V dc with no load at the terminals; A transmitter with Output Code M should have

6.0–14.0 V dc.

Other Components • Replace the transmitter.

Erratic Output Impulse Piping • Check for leaks or blockage in the impulse line.

• Check to ensure that the blocking valve is fully open.

• Check for trapped gas in a liquid line, or trapped liquid in a gas line.

• Check to ensure that the density of the fluid in the impulse line is unchanged.

• Check for sediment in the transmitter process connection. If you find sediment,

flush the process connection clean with water or an appropriate solvent.

• Check for frozen process fluid in the process connector.

• Check for trapped gas in a liquid line, or trapped liquid in a gas line.

Loop Wiring • Check for adequate voltage to the transmitter.(1)

• Check for intermittent shorts, open circuits, and multiple grounds.

Electronics • Check for EMF interference.

• Check damping.

• Replace the output board and recalibrate the transmitter.

Other Components • Replace the transmitter.

Low Output or No

Output

Impulse Piping • Check for leaks or blockage in the impulse line.

• Check to ensure that the blocking valve is fully open.

• Check for trapped gas in a liquid line, or trapped liquid in a gas line.

• Check to ensure that the density of the fluid in the impulse line is unchanged.

• Check for sediment in the transmitter process connection. If you find sediment,

flush the process connection clean with water or an appropriate solvent.

Do not attempt to scrape sediment free; doing so could puncture the thin

isolating diaphragm and destroy the transmitter.

• Check for frozen process fluid in the process connector.

Low Output or No

Output

Loop Wiring • Check test equipment.

• Check for adequate voltage to the transmitter.(1)

• Check the current rating of the power supply against the total current being drawn

by all transmitters being powered.

• Check for intermittent shorts, open circuits, and multiple grounds.

• Check for proper polarity at the signal terminals.

• Check the loop impedance.

Electronics • Replace the electronics board and recalibrate the transmitter.

Other Components • Replace the transmitter.

Rosemount Models 2088/2090 Pressure Transmitters

4-4

TABLE 4-2. Analog Transmitter Troubleshooting Symptoms and Corrective Actions.

DOWNSCALE ALARM Models 2088, 2090P, and 2090F transmitters can identify certain types

of failure conditions. These failures may arise from four possible

sources:

1. No updated information is being received by the microprocessor

from the sensor.

2. The sensor is damaged.

3. Calibration information for zero and span is not being stored

correctly within the memory of the microprocessor.

4. Microprocessor malfunction.

Symptom Potential Source Corrective Action

High Output Impulse Piping • Check for blockage in the impulse line..

• Check to ensure that the blocking valve is fully open.

• Check for trapped gas in a liquid line, or trapped liquid in a gas line.

• Check to ensure that the density of the fluid in the impulse line is unchanged.

• Check for sediment in the transmitter process connection. If you find sediment, flush

the process connection clean with water or an appropriate solvent.

Do not attempt to scrape sediment free; doing so could puncture the thin isolating

diaphragm and destroy the transmitter.

• Check for frozen process fluid in the process connector.

Power Supply • Check the output voltage of the power supply at the transmitter.(1)

(1) A transmitter with Output Code A should have 10.5–36.0 V dc with no load at the terminals; A transmitter with Output Code M should have

6.0–14.0 V dc.

Output Electronics • Replace the output board and recalibrate the transmitter.

Other Components • Replace the transmitter.

Symptom Potential Source Corrective Action

Erratic Output Impulse Piping • Check for leaks or blockage in the impulse line.

• Check to ensure that the blocking valve is fully open.

• Check for trapped gas in a liquid line, or trapped liquid in a gas line.

• Check to ensure that the density of the fluid in the impulse line is unchanged.

• Check for sediment in the transmitter process connection. If you find sediment, flush

the process connection clean with water or an appropriate solvent.

• Check for frozen process fluid in the process connector.

• Check for trapped gas in a liquid line, or trapped liquid in a gas line.

Loop Wiring • Check for adequate voltage to the transmitter.(1)

• Check for intermittent shorts, open circuits, and multiple grounds.

Output Electronics • Replace the output board and recalibrate the transmitter.

Other Components • Replace the transmitter.

Low Output or No

Output

Impulse Piping • Check for leaks or blockage in the impulse line.

• Check to ensure that the blocking valve is fully open.

• Check for trapped gas in a liquid line, or trapped liquid in a gas line.

• Check to ensure that the density of the fluid in the impulse line is unchanged.

• Check for sediment in the transmitter process connection. If you find sediment, flush

the process connection clean with water or an appropriate solvent.

Do not attempt to scrape sediment free; doing so could puncture the thin isolating

diaphragm and destroy the transmitter.

• Check for frozen process fluid in the process connector.

Loop Wiring • Check for adequate voltage to the transmitter.(1)

• Check the current rating of the power supply against the total current being drawn

by all transmitters being powered.

• Check for intermittent shorts, open circuits, and multiple grounds.

• Check for proper polarity at the signal terminals.

• Check the loop impedance.

Output Electronics • Replace the output board and recalibrate the transmitter.

Other Components • Replace the transmitter.

4-5

Maintenance and Troubleshooting

If the transmitter experiences failure conditions, it drives the output

below the lower output limit (less than 3.75 mA for Output Code S; less

than 1 V for Output code M), and if a local indicator is installed, it

displays “FAIL.” If the transmitter encounters the first or second

condition it locks the output at the lower limit. If the transmitter

encounters the third condition it locks the output at the lower limit

after the switch is turned to the “RUN” position.

If you experience downscale alarm, momentarily interrupt power to the

transmitter. After re-applying power, attempt to reset the calibration

point that caused the failure. If the transmitter does not accept the set

value after repeated attempts, the microprocessor board is probably

inoperable. Check the operation of the microprocessor board by

eliminating other sources of low output (i.e. blocked impulse piping).

Remove the output board for spare parts and replace the transmitter.

DISASSEMBLY

PROCEDURE

You can easily repair the Models 2088, 2090P, and 2090F Pressure

Transmitters in the event of a malfunction in the output stage of the

transmitter electronics.

To remove the output circuit board use the following procedure:

1. Remove the cover from the electronics side of the transmitter

housing.

2. Loosen the two captive screws that hold the output board in place.

3. Carefully remove the output board from the multi-pin connector

and the power leads.

REASSEMBLY

PROCEDURE

To replace the output circuit board use the following procedure:

1. Align the two long power leads on the transmitter electronics

board with the power receptacles on the output board. Gently

insert the power leads into the receptacles.

2. Align the multi-pin connector on the output board with the

receptacles on the transmitter electronics board. Gently insert the

multi-pin connector into the receptacles.

3. Push the board firmly into position and tighten the screws.

To view an exploded view, see Figure 5-1 on page 5-7.

Disconnect power to the transmitter before removing the output board.

Failure to follow this procedure could result in permanent damage to the

transmitter electronics.

The circuit board is electrostatically sensitive. To prevent damage to the

circuit board, observe handling precautions for static-sensitive

components.

See “Safety Messages” on page 4-1 for complete warning information.

Rosemount Models 2088/2090 Pressure Transmitters

4-6

RETURNING ROSEMOUNT

PRODUCTS AND/OR

MATERIALS

To expedite the return process outside the United States, contact the

nearest Rosemount representative.

Within the United States, call the Rosemount National Response

Center using the 1-800-654-RSMT (7768) toll-free number. This center,

available 24 hours a day, will assist you with any needed information or

materials.

The center will ask for product model and serial numbers, and will

provide a Return Material Authorization (RMA) number. The center

will also ask for a description of the process material to which the

product was last exposed.

The Rosemount National Response Center will detail the additional

information and procedures necessary to return goods exposed to

hazardous substances.

See “Safety Messages” on page 4-1 for complete warning information.

Section

5-1

5Specifications and

Reference Data

OVERVIEW This section contains the following transmitter specifications and

reference data:

• Model 2088, Model 2090P, and Model 2090F

Functional Specifications

Performance Specifications

Physical Specifications

• Spare Parts

• Ordering Information

FUNCTIONAL

SPECIFICATIONS

Service

Model 2088

Liquid, gas, and vapor applications.

Model 2090P

Liquid, gas, vapor, and high-viscosity applications.

Model 2090F

Liquid, gas, vapor, and sanitary applications.

Ranges for Model 2088

Ranges for Model 2090F

Ranges for Model 2090P

Range Minimum Span

(Smart) URL/Max.span/Sensor Limit

1 1.5 psi (103 mbar) 30 psi (2,06 bar)

2 7.5 psi (517 mbar) 150 psi (10,34 bar)

3 40 psi (2,76 bar) 800 psi (55,15 bar)

4 200 psi (13,8 bar) 4000 psi (275,79 bar)

Range Minimum Span

(Smart) URL/Max.span/Sensor Limit

1 1.5 psi (103 mbar) 30 psi (2,06 bar)

2 7.5 psi (517 mbar) 150 psi (10,34 bar)

3 40 psi (2,76 bar) 300 psi (20,68 bar)

Range Minimum Span

(Smart) URL/Max.span/Sensor Limit

1 1.5 psi (103 mbar) 30 psi (2,06 bar)

2 7.5 psi (517 mbar) 150 psi (10,34 bar)

3 40 psi (2,76 bar) 300 psi (20,68 bar)

Rosemount Model 2088/2090 Pressure Transmitters

5-2

Output

Code S: 4–20 mA dc.

Load Limitations(1)

Maximum loop resistance is determined by the power supply voltage, as

described by:

Power Supply

External power supply(2) required. Transmitter operates on

10.5–36 V dc with no load. Reverse polarity protection is standard.

Zero Elevation and Suppression

Zero can be suppressed between atmosphere for gage transmitters, or

0 psia for absolute transmitters, and upper range limit, provided the

calibrated span is equal to or greater than the minimum span, and the

upper range value does not exceed the upper range limit. Vacuum

calibrations are allowed on the Model 2088G transmitter with

compound range option (CR).

Overpressure Limits

Ranges 0 and 1: 120 psig max.

All other ranges: twice the upper range limit.

Temperature Limits

Process

Model 2088 Silicone fill sensor: –40 to 250 °F (–40 to 121 °C).

Inert fill sensor: –22 to 250 °F (–30 to 121 °C).

Model 2090P –4 to 250 °F (–20 to 121 °C).

Model 2090F –4 to 284 °F (–20 to 140 °C).

Ambient:

Model 2088 –40 to 185 °F (–40 to 85 °C).

–4 to 175 °F (–20 to 80 °C) with LCD meter.

Model 2090P –4 to 185 °F (–20 to 85 °C).

Model 2090F –4 to 185 °F (–20 to 85 °C).

Storage:

Model 2088 –50 to 230 °F (–46 to 110 °C).

–40 to 185 °F (–40 to 85 °C) with LCD meter.

Model 2090P –50 to 185 °F (–45 to 85 °C).

Model 2090F –22 to 185 °F (–30 to 85 °C).

(1) Minimum load impedance for Output Code M is 100 kilohms.

(2) For CENELEC Ex ia approval, the power supply must not exceed 30 volts.

Max. Loop Resistance = 45.4 3(Power Supply Voltage – 10.5)

10.5 15 20 25 30 36

200

400

600

1000

800

1158

Operating

Region

Load (ohms)

Voltage (V dc)

Note: Communication requires minimum loop resistance: 250 ohm

5-3

Specifications and Reference Data

Process temperatures above 185 °F (85 °C) require derating the

ambient limits:

Humidity Limits

0–100% relative humidity.

Volumetric Displacement

Less than 0.00042 cm3.

Turn-on Time

Output Code S

2.0 seconds, no warm-up required.

Failure Mode

Output Code S

If self-diagnostics detect a sensor or microprocessor failure, the

analog signal is driven either high or low to alert the user. High or

low failure mode is user-selectable with a jumper on the transmitter.

The values to which the transmitter drives its output in failure mode

depend on whether it is factory-configured to standard or

NAMUR-compliant operation. The values for each are as follows:

Standard Operation

Linear Output: 3.9 ≤ I ≤ 20.8

Fail High: I ≥ 21.75 mA

Low: I ≤ 3.75 mA

NAMUR-Compliant Operation (Option Code C4)

Linear Output: 3.8 ≤ I ≤ 20.5

Fail High: I ≥ 22.5 mA

Low: I ≤ 3.6 mA

PERFORMANCE

SPECIFICATIONS

(Zero-based spans, reference conditions, and 316 SST isolating diaphragm.)

Reference Accuracy

Output Code S

±0.20% of calibrated span. Includes combined effects of linearity,

hysteresis, and repeatability.

Ambient Temperature Effect

Expressed as a total effect per 100 °F (56 °C).

Output Code S

± (0.3% URL + 0.3% of span) from –40 to 185 °F (–40 to 85 °C).

Stability

Output Code S

±0.10% of upper range limit for 12 months.

Vibration Effect

Less than ±0.1% of upper range limit when subjected to vibration of:

peak to peak constant displacement of 4 mm (5–15 Hz) and constant

acceleration of 2 g (15–150 Hz) and 1 g (150–2000 Hz).

Power Supply Effect

Less than 0.01% of calibrated span per volt.

185 Process Temp 185–()

1.5

-----------------------------------------------------------–=

Maximum Ambient

Temperature in °F

85 Process Temp 85–()

1.5

-------------------------------------------------------–=

Maximum Ambient

Temperature in °C

Rosemount Model 2088/2090 Pressure Transmitters

5-4

Mounting Position Effect

Zero shift of up to 1.2 inH2O (3 mbar), which can be calibrated out. No

span effect.

RFI Effect

Less than ±0.25% of upper range limit from 20–1000 MHz at 30 V/m

with leads in conduit. Less than ±0.25% of upper range limit at 10 V/m

with unshielded twisted pair (no conduit).

Transient Protection Limits

IEEE 587 Category B

6 kV Crest (1.2 3 50 ms).

3 kV Crest (8 3 20 ms).

6 kV Crest (0.5 ms by 100 kHz).

IEEE 472

SWC 2.5 kV Crest.

1 MHz waveform.

General Specifications

Tested to IEC 801-3.

Ordinary Location Certification

Factory Mutual (FM) Approval

As standard, the transmitter has been examined and tested to

determine that the design meets basic electrical, mechanical, and fire

protection requirements by FM, a nationally recognized testing

laboratory (NRTL) as accredited by the Federal Occupational Safety

and Health Administration (OSHA).

Hazardous Locations Certifications

Factory Mutual (FM) Approvals

E5 Explosion Proof for Class I, Division 1, Groups B, C, and D.

Dust-Ignition Proof for Class II, Division 1, Groups E, F, and G.

Suitable for Class III, Division 1, indoor and outdoor (NEMA 4X)

hazardous locations; factory sealed.

I5 Instrinsically safe for use in Class I, Division 1, Groups A, B, C, D;

Class II, Division 1, Groups E, F, and G; and Class III, Division 1

when connected in accordance with Rosemount drawing

02088-1018. Non-incendive for Class I, Division 2, Groups A, B, C,

and D.

Canadian Standards Association (CSA) Approvals

C6 Explosion Proof for Class I, Division 1, Groups B, C, and D.

Dust-Ignition Proof for Class II, Division 1, Groups E, F, and G.

Suitable for Class III, indoor and outdoor hazardous locations,

CSA enclosure Type 4X; factory sealed. Approved for Class I,

Division 2, Groups A, B, C, and D.

Intrinsically Safe for Class I, Division 1, Groups A, B, C, and D.

Temp. Code T3C. Intrinsically safe when connected with

approved barriers in accordance with Rosemount drawing

02088-1024.

CENELEC Flameproof Approvals

E8 Centro Elettrotecnico Sperimentale Italiano (CESI) Flameproof

Approval (Analog only)

Certification Number Ex 91C120.

EEx d IIC T4 (Tamb = 80 °C)

EEx d IIC T6 (Tamb = 40 °C).

ED KEMA/CENELEC 97 ATEX 2378 (Smart only)

EEx d IIC T4 (Tamb = 80 °C)

EEx d IIC T6 (Tamb = 40 °C).

5-5

Specifications and Reference Data

British Approvals Service for Electrical Equipment in Flammable

Atmospheres (BASEEFA) Approvals

I1 BASEEFA/CENELEC Intrinsic Safety

Ex 90C2158 for analog transmitters

Ex97D2276X for smart transmitters.

EEx ia IIC T5 (Tamb = 40 °C).

EEx ia IIC T4 (Tamb = 70 °C).

N1 BASEEFA Type N Certification

Ex 90Y4159 for analog transmitters

Ex 97Y4277X for smart transmitters.

Ex N IIC T5 (Tamb = 70 °C).

Standards Association of Australia (SAA)

Explosion Proof (Flameproof) Certification

E7 Ex d IIC T6 (Tamb = 40 °C) (Available with analog output,

Code A, only.)

I7 Ex ia IIC T6. (Available with analog output, Code A, only.)

Ex ia IIC T4 (Tamb = 70 °C).

Combinations of Approvals

K5 Combination of E5 and I5

K6 Analog: Combination of C6, I1, and E8.

SMART: Combination of C6, I1, and ED.

PHYSICAL

SPECIFICATIONS

Electrical Connection

½–14 NPT, M20 3 1.5 (CM20), PG 13.5, or G ½ female (PF ½ female)

conduit entry.

Process Connection

Model 2088

½–14 NPT female, DIN 16288 G ½ male, RC ½ female (PT ½ female),

M20 3 1.5 (CM20) male.

Model 2090P

M44 3 1.25 male, compatible with a 1-in. PMC® process connection.

Model 2090F

1½-inch or 2-inch Tri-Clamp Connection

Process Wetted Parts

Isolating Diaphragm

Model 2088 316L stainless steel or Hastelloy.

Model 2090P 316L stainless steel.

Model 2090F 316L stainless steel.

Process Connector

Model 2088 316L stainless steel or Hastelloy.

Model 2090P 316L stainless steel.

TFE process connector gasket.

Model 2090F 316L stainless steel.

Non-wetted Parts

Electronics Housing

Low-copper aluminum, NEMA 4X, IP65, IP67, CSA enclosure

Type 4X.

Paint

Polyurethane.

Cover O-rings

Buna-N.

Rosemount Model 2088/2090 Pressure Transmitters

5-6

Fill Fluid

Model 2088 Silicone or inert fill.

Model 2090P Silicone

Model 2090F Neobee

Weight

Model 2088 Approximately 2.44 lb (1,11 kg).

Model 2090P Approximately 2.96 lb (1,34 kg).

Model 2090F Approximately 2.74 lb (1,24 kg).

Accessory Block and Bleed Valve (S5 Option)

For information on Model 306 Integral Manifold (pre-assembled to

transmitter and leak checked), refer to Product Data Sheet

00813-0100-4733.

5-7

Specifications and Reference Data

SPARE PARTS .

2088-2088A04A

FIGURE 5-1. Replacement Parts for

the Model 2088 Smart Transmitter.

2088-2088A08B

LCD Meter Cover Assembly

includes LCD Cover and O-ring

3051-3031A05F

Item No. Part Description Part Number Spares Category(1)

1, 2

Smart Transmitters (Output Code S)

Electronics Cover (with O-ring) 03031-0292-0001 —

6LCD Meter Cover Assembly 03031-0193-0002 B

2Cover O-rings 03031-0232-0001 B

Electronics Board Kits

S Output (4–20 mA/Digital HART Protocol)

S Output (NAMUR Compliant Operation) 02088-0306-0002

02088-0306-0003

Optional Mounting Bracket

(with 2-inch U-Bolt for Pipe Mounting) 02088-0071-0001 —

5, 6

LCD Meter Kit with Cover

LCD Meter Kit without Cover 03031-0193-0101

03031-0193-0103

—

7Local Zero and Span Kit 3031-0293-0002 A

Standard Terminal Block

Transient Protection Block 3031-0332-0003

3031-0332-0004

(1) One spare part is recommended for every 25 transmitters in category A, and one spare part for every 50 transmitters in category B.

Rosemount Model 2088/2090 Pressure Transmitters

5-8

FIGURE 5-2. Replacement Parts for

the Model 2090P.

LCD Meter Cover Assembly

includes LCD Cover and O-ring

Item No. Part Description Part Number Category(1)

(1) One spare part is recommended for every 25 transmitters in category A, and one spare part for every 50 transmitters in category B.

1,2

Smart Transmitters (Output Code S)

Electronics Cover (with O-ring) 03031-0292-0001 —

10 LCD Meter Cover Assembly 03031-0193-0002 B

2Cover O-rings 03031-0232-0001 B

Electronics Boards

S Output (4–20 mA/Digital HART Protocol)

S Output (NAMUR Compliant Operation) 02088-0306-0002

02088-0306-0003

Optional Mounting Bracket

(with 2-inch U-Bolt for Pipe Mounting) 02088-0071-0001 —

9, 10

LCD Meter Kit with Cover

LCD Meter Kit without Cover 03031-0193-0101

03031-0193-0103

—

8Calibration Adapter 02088-0197-0001 A

Teflon

Gaskets (package of 12) 02088-0078-0001 A

316 SST Weld Spud with Heat Isolator Groove

316 SST Weld Spud

316 SST Plug/Heat Sink

02088-0295-0003

02088-0195-0001

02088-0196-0001

—

Standard Terminal Block

Transient Terminal Block 03031-0332-0003

03031-0332-0004

2088-2088A04A

2090-2088A08S

2090-2088C03A

2090-2088B03A

3051-3031A05F

5-9

Specifications and Reference Data

FIGURE 5-3. Replacement Parts for the

Model 2090F.

LCD Meter Cover Assembly

includes LCD Cover and O-ring

NOTE: Sanitary clamp and gasket to be supplied by user.

Item No. Part Description Part Number Category(1)

(1) One spare part is recommended for every 25 transmitters in category A, and one spare part for every 50 transmitters in category B.

Smart Transmitters (Output Code S)

Electronics Cover (with O-ring) 03031-0292-0001 —

5LCD Meter Cover Assembly 03031-0193-0002 B

2O-rings 03031-0232-0001 B

Electronics Boards

S Output (4–20 mA/Digital HART Protocol)

S Output (NAMUR Compliant Operation) 02088-0306-0002

02088-0306-0003

Optional Mounting Bracket

(with 2-inch U-Bolt for Pipe Mounting) 02088-0071-0001 —

4, 5

LCD Meter Kit with Cover

LCD Meter Kit without Cover 03031-0193-0101

03031-0193-0103

—

Calibration Adapter, 1½ inch

Calibration Adapter, 2 inch 02088-0197-0011

02088-0197-0012

Standard Terminal Block

Transient Terminal Block 03031-0332-0003

03031-0332-0004

2090–2088E03A

2090-2088A08R

2088-2088A04A

3051-3031A05F

Rosemount Model 2088/2090 Pressure Transmitters

5-10

ORDERING INFORMATION

TABLE 5-1. Model 2088 Typical Model Structure.

(1) Range 0 is only available with low power output, 8 to1 rangedown, stainless steel wetted parts and silicone oil fill fluid.

(2) Meets NACE material recommendations.

(3) Inert fill fluid not available with range 0 transmitters.

(4) Hazardous locations approvals not available for Model 2088 Smart Transmitter (Output Code S).

Model Product Description (Select One)

2088A

2088G

Absolute Pressure Transmitter

Gage Pressure Transmitter

Code Range

0(1)

0–8 psi (0–6,89 to 0–552 mbar) Low power only

0–30 psi (0–2 bar)

0–150 psi (0–10,3 bar)

0–800 psi (0–55,15 bar)

0–4000 psi (0–275,8 bar)

Code Output

1–5 V dc Low Power

4–20 mA dc/Digital

HART

Protocol

Code MATERIALS OF CONSTRUCTION

Process Connection Isolating Diaphragm Oil Fill

22(2)

33(2)

2B(2)

3C(2)

316 SST 316 SST Silicone

Hastelloy

C-276

Hastelloy

C-276 Silicone

316 SST 316 SST Inert(3)

Hastelloy

C-276

Hastelloy

C-276 Inert

Code Process Connection

½–14 NPT Female

DIN 16288 G ½ Male

RC ½ Female (PT ½ Female)

M20x1.5(CM20)

Code Conduit Thread

½–14 NPT

M20x1.5(CM20)

PG 13.5

G ½ Female (PF ½ Female)

Code Remote Seal Connection

S1 One Remote Seal (Select from Product Data Sheet 00813-0100-4016)

Code Options(4)

E4(4)

E7(4)

I7(4)

N7(4)

LCD Meter, scaled 0–100%

LCD Meter, special configuration

SST Mounting Bracket with SST Bolts

Assembly to Model 306 Integral Manifold (see PDS 00813-0100-4733 for ordering information)

One Diaphragm Seal (Select from Product Data Sheet 00813-0100-4016)

CSA Explosion-Proof, Intrinsic Safety, and Non-Incendive Approval

BASEEFA EEx ia IIC T5 (CENELEC) Intrinsic Safety Approval (Entity Concept)

BASEEFA Type N EX N IIC T5

JIS Explosion-Proof Approval

FM Explosion-Proof Approval

SAA Flame-Proof Certification

CESI/CENELEC Explosion-Proof Approval (available with analog output, Code A, only)

KEMA/CENELEC Explosion-Proof Approval (available with smart output, Code S, only)

FM Non-Incendive and Intrinsic Safety Approval (Entity Concept)

SAA Intrinsic Safety Certification

E5 and I5 Combination

CSA/CENELEC Explosion-Proof and Intrinsic Safety Approval

SAA Non-Incendive Certification

Cleaning for Special Service

Calibration Data Sheet

Material Traceability per DIN 3.1B

Transient Protection Terminal Block

Analog Output Levels Compliant with NAMUR Recommendation NE43, 27-June-1996 (Available with Output Code S only)

NOTE: NAMUR-Compliant operation is pre-set at the factory and cannot be changed to standard operation in the field.

Analog Output Levels Compliant with NAMUR Recommendation NE43, 27-June-1996: Low Alarm Configuration

NOTE: NAMUR-Compliant operation is pre-set at the factory and cannot be changed to standard operation in the field.

Software Configuration (Available with Output Code S only)

Typical Model Number: 2088G 1 S 22 A 1

Rangeability

Output Code Min.Span

SURL/20

MURL/10

5-11

Specifications and Reference Data

TABLE 5-2. Model 2090P Typical Model Structure.

Model Product Description (Select One)

2090PA

2090PG

Absolute Pressure Transmitter

Gage Pressure Transmitter

Code Range

3(1)

(1) Range 3 miniumum span: 0–40 psi.

0–30 psi (0–2 bar)

0–150 psi (0–10,3 bar)

0–300 psi (0–20,7 bar)

Code Output

S4–20 mA dc/Digital

HART

Protocol

Code MATERIALS OF CONSTRUCTION

Process Connection Isolating Diaphragm Oil Fill

22 316 SST 316 SST Silicone

Code Process Connection

No Weld Spud, includes

Teflon

Gasket

316 SST Weld Spud,

Teflon

Gasket

316 SST Weld Spud with Heat Isolator Groove

Code Conduit Thread

½–14 NPT

M20x1.5(CM20)

PG 13.5

Code Options

LCD Meter, scaled 0–100%

LCD Meter, special configuration

SST Mounting Bracket with SST Bolts

Assembly to Model 306 Integral Manifold (see PDS 00813-0100-4733 for ordering information)

CSA Explosion-Proof, Intrinsic Safety, and

Non-Incendive Approval

BASEEFA EEx ia IIC T5 (CENELEC) Intrinsic Safety Approval (Entity Concept)

BASEEFA Type N EX N IIC T5

FM Explosion-Proof Approval

CESI/CENELEC Explosion-Proof Approval (available with analog output, Code A, only)

KEMA/CENELEC Explosion-Proof Approval (available with smart output, Code S, only)

FM Non-Incendive and Intrinsic Safety Approval (Entity Concept)

E5 and I5 Combination

CSA/CENELEC Explosion-Proof and Intrinsic Safety Approval

Cleaning for Special Service

Calibration Data Sheet

Material Traceability per DIN 3.1B

Transient Protection Terminal Block

Typical Model Number: 2090PG 2 S 22 B 1

Rangeability

Output Code Min.Span

SURL/20

Rosemount Model 2088/2090 Pressure Transmitters

5-12

TABLE 5-3. Model 2090F Typical Model

Structure.

NOTE

One product manual is included per shipment.

CALIBRATION All transmitters are factory calibrated to customer’s specified range. If

calibration is not specified, transmitters are calibrated at maximum

range. Calibration is at ambient temperature.

TAGGING Transmitter are tagged, at no charge, in accordance with customer

requirements. All tags are stainless steel. The standard tag is wired to

the transmitter. Tag character height is 1/8-inch (0,318 cm). A

permanently attached tag is available upon request.

Model Product Description (Select One)

2090FA

2090FG

Sanitary Absolute Pressure Transmitter

Sanitary Gage Pressure Transmitter

Code Range

3(1)

0–30 psi (0–2 bar)

0–150 psi (0–10,3 bar)

0–300 psi (0–20,7 bar)

Code Output

S 4–20 mA dc/Digital

HART

Protocol

Code MATERIALS OF CONSTRUCTION

Process Connection Isolating Diaphragm Oil Fill

2D 316 SST 316 SST Neobee

Code Process Connection

1½-inch

Tri-Clamp

Connection

2-inch

Tri-Clamp

Connection

Code Conduit Thread

½–14 NPT

M20x1.5(CM20)

PG 13.5

Code Options

LCD Meter, scaled 0–100%

LCD Meter, special configuration

SST Mounting Bracket with SST Bolts

Assembly to Model 306 Integral Manifold (see PDS 00813-0100-4733 for ordering information)

CSA Explosion-Proof, Intrinsic Safety, and Non-Incendive Approval

BASEEFA EEx ia IIC T5 (CENELEC) Intrinsic Safety Approval (Entity Concept)

BASEEFA Type N EX N IIC T5

FM Explosion-Proof Approval

CESI/CENELEC Explosion-Proof Approval (available with analog output, Code A, only)

KEMA/CENELEC Explosion-Proof Approval (available with smart output, Code S, only)

FM Non-Incendive and Intrinsic Safety Approval (Entity Concept)

E5 and I5 Combination

CSA/CENELEC Explosion-Proof and Intrinsic Safety Approval

Cleaning for Special Service

Calibration Data Sheet

Material Traceability per DIN 3.1B

Transient Protection Terminal Block

Typical Model Number: 2090FG 2 S 2D E 1

(1) Range 3 minimum span: 0–40 psi.

Rangeability

Output Code Min.Span

SURL/20

Appendix

A-1

ALCD Meter

LCD METER The LCD meter provides local indication of the output, and abbreviated

diagnostic messages governing transmitter operation. The meter is

located on the electronics module side of the transmitter, maintaining

direct access to the signal terminals. An extended cover is required to

accommodate the meter.

The new meter features a two-line display that accommodates five

digits for reporting the process variable on the top line, and six

characters for displaying engineering units on the bottom line. The

meter uses both lines to display diagnostic messages. You can configure

the meter to display the following information:

• Engineering Units

• Percent of Range

• User-Configurable LCD Scale

• Alternating between any two of the above

SAFETY MESSAGES Procedures and instructions in this section may rewuire special

precautions to ensure the safety of the personnel performing the

operations. Information that raises potential safety issues is indicated

by a warning symbol ( ). Refer to the following safety messages before

performing an operation preceded by this symbol.

Warnings ( )

Explosions can result in death or serious injury.

• Do not remove the transmitter covers in explosive environments when the

circuit is alive.

• Transmitter covers must be fully engaged to meet explosionproof requirements.

• Before connecting a communicator in an explosive atmosphere, make sure the

instruments in the loop are installed in accordance with intrinsically safe or

nonincendive field wiring practices.

Rosemount Model 2088/2090 Pressure Transmitters

A-2

CUSTOM METER

CONFIGURATION

The user-configurable scale is a feature that enables the LCD meter to

display flow, level, or custom pressure units. The meter can be

configured using a Model 275 HART Communicator or AMS.

The user-configurable scale feature can define:

• decimal point position

• upper range values

• lower range values

• engineering units

• transfer function

To configure the meter using AMS, click the LOCAL DISPLAY tab on

the CONFIGURATION PROPERTIES screen. To configure the meter

with a HART communicator, perform the following procedure:

1. Connect the communicator to the transmitter. Before connecting

a communicator in an explosive atmosphere, make sure the

instruments in the loop are installed according to intrinsically

safe or nonincendive field wiring practices.

2. From the ONLINE screen, select 1Device Setup, 3 Basic Setup,

7 Meter Options, 2 Custom Meter Setup.

3. To specify decimal point position:

a. Select 1 Sel dec pt pos. Choose the decimal point

representation that will provide the most accurate output for

your application. For example, when outputting between 0 and

75 GPM, choose XX.XXX.

b. Go to step 8.

4. To specify a custom upper range value:

a. Select 2 CM Upper Value. Type the value that you want the

transmitter to read at the 20 mA point.

b. Go to step 8.

5. To specify a custom lower range value:

a. Select 3 CM Lower Value. Type the value that you want the

transmitter to read at the 4 mA point.

b. Go to step 8.

6. To define custom units:

a. Select 4 CM Units. Enter the custom units (five characters

maximum) that you want the meter to display.

b. Go to step 8.

7. To choose the transmitter transfer function for the meter:

a. Select 5 CM xfer fnct. Enter the transmitter transfer function

for the meter. Select sq root to display flow units. The custom

meter transfer function is independent of the analog output

transfer function.

8. Select F2 SEND to upload the configuration to the transmitter.

See “Safety Messages” on page A-1 for complete warning information.

A-3

LCD Meter

FIGURE A-1. Exploded View of the

Transmitter with Optional LCD Meter.

DIAGNOSTIC MESSAGES In addition to the output, the LCD meter displays abbreviated

operation, error, and warning messages for troubleshooting the

transmitter. Messages appear according to their priority, with normal

operating messages appearing last. To determine the cause of a

message, use a Model 275 HART Communicator to further interrogate

the transmitter. A description of each LCD diagnostic message follows.

Error Error messages appear on the LCD meter display to inform you of

serious problems effecting the operation of the transmitter. The meter

displays an error message until the error condition is corrected, and the

analog output is driven to the specified alarm level. No other

transmitter information is displayed during an alarm condition.

FAIL

The transmitter CPU board and the sensor module are incompatible.

FAIL MODULE

The sensor module is disconnected or is malfunctioning. Verify that the

sensor module ribbon cable is connected to the back of the electronics

board. If the ribbon cable is not disconnected, there is a problem within

the sensor module. Possible sources of problems include:

• Pressure or temperature updates are not being received in the

sensor module.

• A non-volatile memory fault that will effect transmitter operation

has been detected in the module by the memory verification

routine.

FAIL ELECT

The transmitter electronics module is malfunctioning. Possible causes

include:

• Internal fault

• A non-volatile memory fault that will effect transmitter operation

has been detected in the module by the memory verification

routine

Neither problem is repairable; the electronics board must be replaced.

Interconnecting Pins

Jumpers (top and bottom)

LCD Meter

Extended Cove

2088S-2088A05B

Rosemount Model 2088/2090 Pressure Transmitters

A-4

FAIL CONFIG

A non-volatile memory fault has been detected in the transmitter

memory by the memory verification routine. The memory fault is in a

location that could effect transmitter operation, and is user-accessible.

To correct this problem, use a Model 275 HART Communicator to

interrogate and reconfigure the appropriate portion of the

transmitter memory.

Warnings Warnings appear on the LCD meter display to alert you of user-

repairable problems with the transmitter, or current transmitter

operations. Warnings appear alternately with other transmitter

information until the warning condition is corrected or the transmitter

completes the operation that triggered the warning message.

PRESS LIMIT

The process variable read by the transmitter is outside of sensor

range limits.

CURR FIXED

The transmitter is in multidrop mode. The analog output is not

tracking pressure changes.

CURR SATURD

The pressure read by the module is outside of the specified range, and

the analog output has been driven to saturation levels (see Failure

Mode and Security Jumpers on page 3-12).

LOOP TEST

A loop test is in progress. During a loop test or 4–20 mA trim, the

analog output is set to a fixed value. The meter display alternates

between the current selected in milliamps and “LOOP TEST.”

XMTR INFO

A non-volatile memory fault has been detected in the transmitter

memory by the memory verification routine. The memory fault is in a

location containing transmitter information. To correct this problem,

use a Model 275 HART Communicator to interrogate and reconfigure

the appropriate portion of the transmitter memory. This warning does

not effect the transmitter operation.

Operation Normal operation messages appear on the LCD meter to confirm actions

or inform you of transmitter status. Operation messages are displayed

with other transmitter information, and warrant no action to correct or

alter the transmitter settings.

ZERO PASS

The zero value, set with the local zero adjustment button, has been

accepted by the transmitter, and the output should change to 4 mA.

ZERO FAIL

The zero value, set with the local zero adjustment button, exceeds the

maximum rangedown allowed for a particular range, or the pressure

sensed by the transmitter exceeds the sensor limits.

SPAN PASS

The span value, set with the local span adjustment button, has been

accepted by the transmitter, and the output should change to 20 mA.

A-5

LCD Meter

LOCAL DSBLD

This message appears during reranging with the integral zero and span

buttons and indicates that the transmitter local zero and span

adjustments have been disabled. The adjustments may have been

disabled by the transmitter security jumper on the transmitter circuit

board or through software commands from the Model 275. Refer to

Failure Mode and Security Jumpers on page 3-12 for information on

the position of the security jumper, and for information on the

software lockout.

WRITE PROTCT

The write protect (SECURITY) jumper is set to disable changes to the

transmitter configuration data. Refer to Failure Mode and Security

Jumpers on page 3-12 for more information on the security jumper.

Rosemount Model 2088/2090 Pressure Transmitters

A-6

Appendix

B-1

BModel 275 HART Communicator

OVERVIEW This appendix provides basic communicator information on the Model

275 HART Communicator when used with Models 2088, 2090P, or

2090F Smart Pressure Transmitters.

Included in this appendix are a menu tree, a table of fast key sequences,

and information on using the HART communicator.

For more complete information on the HART Communicator, refer to

the HART Communicator Product Manual 00809-0100-4275.

This brief appendix will familiarize you with the HART Communicator

but is not meant to replace the HART Communicator product manual.

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 could result in death or serious injury:

• Do not make connections to the serial port or NiCad recharger jack in an

explosive atmosphere.

• Before connecting a HART-based 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.

High voltage that may be present on leads could cause electrical shock:

• Avoid contact with leads and terminals.

Rosemount Model 2088/2090 Pressure Transmitters

B-2

FIGURE B-1. HART Communicator

Menu Tree for the Model 2088 Smart.

9 Pressure

10 Percent Range

11 Analog Output

9Tag

10 Unit

11 RANGE VALUES

12 DEVICE INFO

13 Damp

14 METER

OPTIONS

9 Self test

10 Status

9 Keypad Input

10 Apply Values

9 Loop Test

10 Digital-to-Analog Trim

11 Scaled D/A Trim

12 AO Alarm Type

9 Poll Address

10 Number of Req.

Pream.

11 Burst Mode

9 Digital-to-Analog Trim

10 Scaled D/A Trim

9ZeroTrim

10 Lower Sensor Trim

11 Upper Sensor Trim

12 Sensor Trim Cal

Type

9Date

10 Descriptor

11 Message

12 Write

9 Keypad Input

10 Apply Values

9Pressure

10 Percent Range

9 Keypad Input

10 Apply Values

9 Pressure

10 Percent Range

11 Analog Output

9 FIELD DEVICE INFO

10 SENSOR INFO

11 Self Test

12 DIAPHRAGM

SEALS INFO

9 DEVICE SETUP

10 PV

11 AO

12 LRV

13 URV

9 PROCESS

VARIABLES

10 DIAGNOSTIC

S AND

SERVICE

11 BASIC SETUP

12 DETAILED

SETUP

9 TEST DEVICE

10 Loop Test

11 CALIBRATION

9 RERANGE

10 ANALOG

OUTPUT TRIM

11 SENSOR TRIM

9 Pressure

10 % Range

9 PROCESS

VARIABLES

10 SENSOR

TRIM

11 Unit

Online Menu

9ZeroTrim

10 Lower Sensor Trim

11 Upper Sensor Trim

12 Snsr Trim Cal Type

13 Sensor Trim Points

9 PRESSURE SNSR

9 SENSORS

10 SIGNAL

CONDITION

11 OUTPUT

CONDITION

12 DEVICE

INFORMATION 9Tag

10 Date

11 Descriptor

12 Message

13 Model

14 Write Protect

15 Local Keys

16 REVISION #s

17 Final Assy #

Device ID

Distributor

9 Measurement Type

10 Isolator Material

11 Fill Type

12 Proc. Conn. Type

13 Proc. Conn.

9 Meter Type

10 CUSTOM

METER SETUP

9 Select Dec. Pt. Pos.

10 CM Upper Value

11 CM Lower Value

12 CM Units

9 PROCESS

VARIABLES

10 RANGE VALUES

11 Unit

12 Damp

9PROCESS

VARIABLES

10 ANALOG

OUTPUT

11 HART OUTPUT

12 METER

9 Diaph. Seal Type

10 Diaph. Seal Fill

Fluid

9 Meter Type

10 CUSTOM

METER SETUP

11 Custom Meter

9 Select Dec. Pt. Pos.

10 CM Upper Value

11 CM Lower Value

12 CM Units

9Univ.Rev.

10 Fld. Dev.

Rev.

B-3

Model 275 HART Communicator

TABLE B-1. HART Fast Key

Sequences for the Model 2088S.

Function HART Communicator Fast Key Sequences

Analog Output 3

Analog Output Alarm 1, 4, 3, 2, 4

Burst Mode Control 1, 4, 3, 3, 3

Burst Operation 1, 4, 3, 3, 4

Calibration 1, 2, 3

Damping 1, 3, 5

Date 1, 3, 4, 1

Descriptor 1, 3, 4, 2

Digital To Analog Trim (4–20 mA Output) 1, 2, 3, 2, 1

Disable Local Span/Zero Adjustment 1, 4, 4, 1, 7

FieldDeviceInfo 1,4,4,1

Keypad Input 1, 2, 3, 1, 1

Loop Test 1, 2, 2

Lower Range Value 4, 1

Lower Sensor Trim 1, 2, 3, 3, 2

Message 1, 3, 4, 3

MeterType 1,3,6,1

Number of Requested Preambles 1, 4, 3, 3, 2

Output Trim 1, 2, 3, 2

Percent Range 1, 1, 2

Poll Address Left Arrow, 5, 1

Pressure 2

Range Values 1, 3, 3

Rerange 1, 2, 3, 1

Scaled D/A Trim (4–20 mA Output) 1, 2, 3, 2, 2

Self Test (Transmitter) 1, 2, 1, 1

Sensor Info 1, 4, 4, 2

Sensor Trim (Full Trim) 1, 2, 3, 3

Sensor Trim Points 1, 2, 3, 3, 5

Status 1, 2, 1, 2

Tag 1, 3, 1

Transmitter Security (Write Protect) 1, 3, 4, 4

Units (Process Variable) 1, 3, 2

Upper Range Value 5

UpperSensorTrim 1,2,3,3,3

Zero Trim 1, 2, 3, 3, 1

Rosemount Model 2088/2090 Pressure Transmitters

B-4

CONNECTIONS AND

HARDWARE

The HART Communicator Model 275 can interface with a transmitter

from the control room, the instrument site, or any wiring termination point

in the loop through the rear connection panel as shown in Figure B-2. To

communicate, connect the HART Communicator in parallel with the

instrument or load resistor. The connections are non-polarized. Avoid

contact with leads and terminals. Do not make connections to the serial

port or NiCad recharger jack in an explosive atmosphere. Before

connecting the HART Communicator in an explosive atmosphere, make

sure the instruments in the loop are installed in accordance with

intrinsically safe or nonincendive field wiring practices. Both transmitter

covers must be fully engaged to meet explosion proof requirements.

FIGURE B-2. Rear Connection Panel

with Optional NiCad Recharger Pack.

NOTE

The HART Communicator needs a minimum of 250 ohms resistance in

the loop to function properly. The HART Communicator does not

measure loop current directly.

FIGURE B-3. Bench Hook-up

(4–20 mA Transmitters).

Loop Connection Ports

Serial Port

Optional NiCad

Recharger Jack

275-008AB

24 V dc

Supply

Current

Meter

RL≥250 V

2088S-2088C02C

The signal loop may be grounded at any single

point in the loop, or may be left ungrounded.

See “Safety Messages” on page B-1 for complete warning information.

B-5

Model 275 HART Communicator

COMMUNICATOR KEYS The keys of the HART Commuincator include action, function,

alphanumeric, and shift keys

FIGURE B-4. The HART

Communicator.

Action Keys As shown in Figure B-4, the action keys are the six blue, white, and

black keys located above the alphanumeric keys. The function of each

key is described as follows:

ON/OFF Key

Use this key to power the HART Communicator. When the

communicator is turned on, it searches for a transmitter on the

4–20 mA loop. If a device is not found, the communicator displays the

message, “No Device Found. Press OK.”

If a HART-compatible device is found, the communicator displays the

Online Menu with device ID and tag.

Directional Keys

Use these keys to move the cursor up, down, left, or right. The right

arrow key also selects menu options, and the left arrow key returns to

the previous menu.

HOT Key

Use this key to quickly access important, user-selectable options when

connected to a HART-compatible device. Pressing the Hot Key turns

the HART Communicator on and displays the Hot Key Menu.

See Customizing the Hot Key Menu in the HART Communicator

manual for more information.

Function Keys

Action Keys

Alphanumeric Keys

Shift Keys

275-011AB

Rosemount Model 2088/2090 Pressure Transmitters

B-6

Function Keys Use the four software-defined function keys, located below the LCD, to

perform software functions. On any given menu, the label appearing

above a function key indicates the function of that key for the current

menu. As you move among menus, different function key labels appear

over the four keys. For example, in menus providing access to on-line

help, the label may appear above the F1 key. In menus providing

access to the Online Menu, the label may appear above the F3 key.

Simply press the key to activate the function. See your HART

Communicator manual for details on specific function key definitions.

Alphanumeric and Shift Keys The alphanumeric keys, see Figure B-5 perform two functions: the fast

selection of menu options and data entry.

FIGURE B-5. HART Communicator

Alphanumeric and Shift Keys.

Data Entry Some menus require data entry. Use the alphanumeric and shift keys to

enter all alphanumeric information into the HART Communicator. If

you press an alphanumeric key alone from within an edit menu, the

bold character in the center of the key appears. These large characters

include the numbers zero through nine, the decimal point (.), and the

dash symbol (—).

To enter an alphabetic character, first press the shift key that

corresponds to the position of the letter you want on the alphanumeric

key. Then press the alphanumeric key. For example, to enter the letter

R, first press the right shift key, then the “6” key, see Figure B-6. Do not

press these keys simultaneously, but one after the other.

FIGURE B-6. Data Entry Key Sequence.

HELP

HOME

2088S-275-0383A

2088S-275-0352A, 0343A

B-7

Model 275 HART Communicator

Fast Key Sequences HART Fast Key Sequences provide quick on-line access to transmitter

variables and functions. Instead of stepping your way through the menu

structure using the action keys, you can press a HART fast key sequence

to move from the Online Menu to the desired variable or function.

On-screen instructions guide you through the rest of the screens.

Conventions The fast key sequences for the Model 275 use the following conventions

for their identification:

1 through 9–Refer to the keys located directly below the dedicated

keypad.

Left Arrow–Refers to the left arrow directional key.

Example HART fast key sequences are made up of the series of numbers

corresponding to the individual options in each step of the menu

structure. For example, from the Online Menu you can change the Date.

Following the menu structure, press 1 to reach Device Setup, press 3

for Basic Setup, press 4 for Device Info, press 5 for Date. The

corresponding HART fast key sequence is 1,3,4,5.

HART fast keys are operational only from the Online Menu. If you use

them consistently, you will need to return to the Online Menu by

pressing (F3) when it is available. If you do not start at the Online

Menu, the HART fast key sequences will not function properly.

Use Table B-1, an alphabetical listing of every on-line function, to find

the corresponding HART fast key sequences. These codes are applicable

only to Model 2088S transmitters and the HART Communicator.

MENUS AND FUNCTIONS The HART Communicator is a menu driven system. Each screen

provides a menu of options that can be selected as outlined above, or

provides direction for input of data, warnings, messages, or other

instructions.

Main Menu When the HART Communicator is turned on, one of two menus will

appear. If the HART Communicator is connected to an operating loop,

the communicator will find the device and display the Online Menu (see

below). If it is not connected to a loop, the communicator will indicate

that no device was found. When you press OK (F4), it will display the

Main menu.

The Main Menu provides the following options:

•Offline–saves or retrieves transmitter configuration information.

•Online–connects the communicator to a compatible device.

NOTE

Online communication with the transmitter automatically loads the

current transmitter data to the HART Communicator. Changes in

online data are made active by pressing SEND (F2). The transfer

function is used only for off-line data retrieval and sending.

•Frequency Device–The Frequency Device option displays the

frequency output and corresponding pressure output of

current-to-pressure transmitters.

•Utility–The Utility option provides access to the contrast control

for the HART Communicator LCD screen and to the autopoll

setting used in multidrop applications.

HOME

Rosemount Model 2088/2090 Pressure Transmitters

B-8

Once selecting a main menu option, the HART Communicator provides

the information you need to complete the operation. If further details

are required, consult the HART Communicator manual.

Online Menu The Online Menu can be selected from the main menu as outlined

above, or it may appear automatically if the HART Communicator is

connected to an active loop and can detect an operating transmitter.

NOTE

The main menu can be accessed from the Online Menu. Press the left

arrow action key to deactivate the on-line communication with the

transmitter and to activate the main menu options.

When configuration variables are reset in the on-line mode, the new

settings are not activated until the data are sent to the transmitter.

Press SEND (F2) when it is activated to update the process variables of

the transmitter.

On-line mode is used for direct evaluation of a particular meter,

reconfiguration, changing parameters, maintenance, and other

functions.

B-9

Model 275 HART Communicator

Diagnostic Messages The following pages contain a list of messages used by the HART

Communicator (HC) and their corresponding descriptions.

Variable parameters within the text of a message are indicated with

<variable parameter>.

Reference to the name of another message is identified by

[another message].

Message Description

Add item for ALL device types or only for this

ONE device type.

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.

Command Not Implemented The connected device does not support this function.

Communication Error Either a device sends back a response indicating that the message it received was unintelligible,

or the HC cannot understand the response from the device.

Configuration memory not compatible with

connected device

The configuration stored in memory is incompatible with the device to which a transfer has

been requested.

Device Busy The connected device is busy performing another task.

Device Disconnected Device fails to respond to a command.

Device write protected Device is in write-protect mode. Data can not be written.

Device write protected. Do you still want to

shut off? Device is in write-protect mode. Press YES to turn the HC off and lose the unsent data.

Display value of variable on hotkey menu? Asks whether the value of the variable should be displayed adjacent to its label on the hotkey

menu if the item being added to the hotkey menu is a variable.

Download data from configuration memory

to device PromptsusertopressSENDsoftkeytoinitiateamemorytodevicetransfer.

Exceed field width Indicates that the field width for the current arithmetic variable exceeds the device- specified

description edit format.

Exceed precision Indicates that the precision for the current arithmetic variable exceeds the device- specified

description edit format.

Ignore next 50 occurrences of status? Asked after displaying device status. Softkey answer determines whether next 50 occurrences of

device status will be ignored or displayed.

Illegal character An invalid character for the variable type was entered.

Illegal date The day portion of the date is invalid.

Illegal month The month portion of the date is invalid.

Illegal year The year portion of the date is invalid.

Incomplete exponent The exponent of a scientific notation floating point variable is incomplete.

Incomplete field The value entered is not complete for the variable type.

Looking for a device Polling for multidropped devices at addresses 1–15.

Mark as read only variable on hotkey menu? 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.

No device configuration in

configuration memory There is no configuration saved in memory available to reconfigure off-line or transfer to a device.

No Device Found Poll of address zero fails to find a device, or poll of all addresses fails to find a device if auto-poll

is enabled.

No hotkey menu available for this device. There is no menu named “hotkey” defined in the device description for this device.

No offline devices available. There are no device descriptions available to be used to configure a device offline.

No simulation devices available. There are no device descriptions available to simulate a device.

No UPLOAD_VARIABLES in ddl for this

device

There is no menu named “upload_variables” defined in the device description for this device. This

menu is required for offline configuration.

No Valid Items The selected menu or edit display contains no valid items.

OFF KEY DISABLED Appears when the user attempts to turn the HC off before sending modified data or before

completing a method.

Online device disconnected with unsent data.

RETRY or OK to lose data.

There is unsent data for a previously connected device. Press RETRY to send data, or press OK

to disconnect and lose unsent data.

Rosemount Model 2088/2090 Pressure Transmitters

B-10

Message Description

Out of memory for hotkey configuration.

Delete unnecessary items.

There is no more memory available to store additional hotkey items. Unnecessary items should

be deleted to make space available.

Overwrite existing configuration memory Requests permission to overwrite existing configuration either by a device-to-memory transfer or

by an offline configuration. User answers using the softkeys.

Press OK... Press the OK softkey. This message usually appears after an error message from the application

or as a result of HART communications.

Restore device value? The edited value that was sent to a device was not properly implemented. Restoring the device

value returns the variable to its original value.

Save data from device to

configuration memory Prompts user to press SAVE softkey to initiate a device-to-memory transfer.

Saving data to configuration memory. Data is being transferred from a device to configuration memory.

Sending data to device. Data is being transferred from configuration memory to a device.

There are write only variables which have not

been edited. Please edit them.

There are write-only variables which have not been set by the user. These variables should be set

or invalid values may be sent to the device.

There is unsent data. Send it before

shutting off?

Press YES to send unsent data and turn the HC off. Press NO to turn the HC off and lose the

unsent data.

Too few data bytes received Command returns fewer data bytes than expected as determined by the device description.

Transmitter Fault Device returns a command response indicating a fault with the connected device; the transmitter

is in alarm.

Units for <variable label> has changed. Unit

must be sent before editing, or invalid data

will be sent.

The engineering units for this variable have been edited. Send engineering units to the device

before editing this variable.

Unsent data to online device. SEND or

LOSE data There is unsent data for a previously connected device which must be sent or thrown away before

connecting to another device.

Use up/down arrows to change contrast. Press

DONE when done. Gives direction to change the contrast of the HC display.

Value out of range 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.

<message> occurred reading/writing

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.

<variable label> has an unknown value. Unit

must be sent before editing, or invalid data

will be sent.

A variable related to this variable has been edited. Send related variable to the device before

editing this variable.

Appendix

C-1

CModel 2088 Low Power Option

OVERVIEW The information in this appendix is specific to the Model 2088 Low

Power Pressure Transmitter. This transmitter outputs a 1–5 V dc

signal proportional to input pressure. The Low Power Option is

designated with Output Code M.

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 ( ). Power and signal connections are made by

removing the housing cover on the field terminal side of the transmitter

housing.

COMMISSIONING THE

TRANSMITTER

The Model 2088 Analog Pressure Transmitter can be continuously

adjusted to spans between maximum span and 1/10 of maximum span(1).

Transmitter linearity information is programmed into the

microprocessor at the factory; linearity adjustment is not necessary in

the field.

INSTALLATION To install the low power analog transmitter, follow the procedures in

Section 3 Installation. The housing of the analog transmitter is slightly

different from that of the smart transmitter. Dimensional drawings of

the analog transmitter are provided in Figure C-1.

Explosions could result in death or serious injury:

• Do not remove the transmitter cover in explosive atmospheres when the circuit

is alive.

• 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 explosionproof

requirements.

Failure to follow these installation guidelines could result in death or

serious injury:

• Make sure only qualified personnel perform the installation.

(1) For Model 2088 Range 0, minimum span is 1 psi.

Rosemount Model 2088/2090 Pressure Transmitters

C-2

Figure C-1. Low Power Analog Transmitter Dimensional Drawings.

WIRING Power and signal connections are made by removing the housing cover

on the field terminal side of the transmitter housing.

Connect the positive lead from the power supply to the (+) PWR

terminal and the negative lead to the (–) terminal. Connect the positive

lead of the readout device or A/D converter to the “Vout” terminal and

the negative lead to the “–” terminal. Shielded pair wiring is

recommended and all common leads should be connected to the same

ground, see Figure C-2.

0.75 (19)

Clearance for

Cover Removal

231/2–14 NPT*

Conduit

Connection

Terminal

Connections Side

Certifications Tag

Transmitter

Circuitry Side

Optional Meter

4.36 (119)

3.80 (97) Max.

Nameplate

231/4-20 UNC - 2B

Mounting Holes

1/2- 14 NPT Female†

Process Connection

2.80 (71)

4.29

(109)

5.10

(130)

Typical

*M2031.5 Female (CM20), PG 13.5, and G 1/2Female (PF 1/2), also available as options.

†DIN 16288 G 1/2Male, RC 1/2Female (PT 1/2(+) and M20 31.5 Male [CM20]), also available as options.

Dimensions are in in. (mm).

2088-2088A07A, B07A

Do not connect the positive lead from the power supply to the “+” V out termination on

the terminal side of the electronic housing. This may result in an erroneous output and

may damage the output board, the power supply, or both.

C-3

Model 2088 Low Power Option

Figure C-2. Field Wiring for Model 2088—Low Power Option Code M.

CALIBRATION The procedure for calibrating the Model 2088 is different from that of

other pressure transmitters and takes some time to become accustomed

to. However, this method of calibration is considerably faster than other

calibration methods. In addition, there is no interaction between the

zero and span adjustments.

An important feature of this design is that the potentiometer is an

active part of the circuit only during calibration. The potentiometer is

removed from the active circuit when the switch is placed in the “RUN”

position. The design that allows deactivation of the potentiometer

eliminates the temperature drift and stability shifts often associated

with common potentiometers.

Selector Switch The selector switch is labeled “Z” (Zero), “RUN,” and “S” (Span). The

switch is set to the “RUN” position at the factory and should remain

there under normal operation. The microprocessor will not accept a new

value from the switch until you adjust the potentiometer. Therefore, in

case you accidentally change the switch position, you can return it to

the “RUN” position without affecting calibration if you do not turn the

potentiometer.

Power Supply

AtoD

Converter

Shield

2088-B02F

The selector switch must be returned to the “RUN” position after setting the proper

calibration. Failure to return the switch to the “RUN” position will result in erroneous

transmitter output during an overpressure condition.

Rosemount Model 2088/2090 Pressure Transmitters

C-4

Potentiometer Adjustment The potentiometer is marked “DN” (Down), “FINE,” and “UP.” The

coarse adjustment regions are at each end, and a fine adjustment

region is in the center. The output of the transmitter increases or

decreases automatically when the potentiometer is placed in the coarse

adjustment regions. The longer the potentiometer is held in the coarse

adjustment region, the faster the rate of change in output.

NOTE

When the transmitter output is saturated, the potentiometer may

appear to have no effect on the transmitter calibration because the

microprocessor is adjusting the calibration, but the current-limiting

circuitry is maintaining the output at the saturation levels. Place the

potentiometer in the coarse-adjust region and wait several seconds for

the output to change.

Setting the Zero

Setting the zero point of the transmitter involves applying pressure and

adjusting the potentiometer accordingly. To set the zero point of the

transmitter, use the following procedure.

1. If the transmitter does not have a readout device, attach a

voltmeter. Terminals for monitoring or calibrating are located in

two separate locations. The first is in the terminal compartment.

Connect the positive lead to the “–” terminal. When calibrating

directly from the output board, connect the positive lead of the

voltmeter to the terminal labeled “+ TEST” and the negative lead

to the “– TEST” terminal, see Figure C-3.

2. Ensure that the selector switch is in the “RUN” position. Apply

the pressure to which the zero point will be calibrated.

3. Set the selector switch to “Z.”

4. Using the potentiometer, adjust the transmitter output until the

readout device reads the desired value.

5. Return the selector switch to the “RUN” position.

The potentiometer is a 3/4-turn device and has a mechanical stop to prevent full rotation.

Do not exert large twisting forces against the mechanical stop or damage will result.

Do not contact meter leads from either test terminal on the output board to case ground.

Contact can result in the maximum current from the power supply flowing through the

test meter and may blow the test meter fuse, or damage the test meter or transmitter.

See “Safety Messages” on page C-1 for complete warning information.

C-5

Model 2088 Low Power Option

Setting the Span

Setting the span of the transmitter involves applying pressure and

adjusting the potentiometer accordingly. To set the span of the

transmitter, use the following procedure:

1. If the transmitter does not have a readout device, attach a

voltmeter. Terminals for monitoring or calibrating are located in

two separate locations. The first is in the terminal compartment.

Connect the positive lead of the voltmeter to the “V out” terminal

and the negative lead to the “–” terminal. When calibrating

directly from the output board, connect the positive lead of the

voltmeter to the terminal labeled “+ TEST” and the negative lead

to the “– TEST” terminal, see Figure C-3.

2. Ensure that the selector switch is in the “RUN” position. Expose

the transmitter to full scale pressure.

3. Set the selector switch to “S.”

4. Using the potentiometer, adjust the transmitter output until the

readout device reads the desired value.

5. Return the switch to “RUN.”

NOTE

The microprocessor limits the amount of rangedown allowed for span. If

the rangedown conditions are violated, transmitter calibration is

unaffected as long as the switch is placed in the “S” position and the

potentiometer is adjusted.

Figure C-3. Transmitter Terminal and

Electronics Compartments.

Do not contact meter leads from either test terminal on the output board to case ground.

Contact can result in the maximum current from the power supply flowing through the

test meter and may blow the test meter fuse, or damage the test meter or transmitter.

Test

Terminals

Selector

Switch

Potentio-

meter

Negative

Terminal

Test

Terminal

2088-B02H, A02A

TERMINAL

COMPARTMENT ELECTRONICS

DEPARTMENT

See “Safety Messages” on page C-1 for complete warning information.

Rosemount Model 2088/2090 Pressure Transmitters

C-6

TRANSIENT PROTECTION

OPTION

The transient protection option helps to protect the transmitter

electronics from potentially damaging transient voltages.

The transient protection board is installed at the factory or may be

installed in the field directly over the transmitter terminal block using

the existing terminal screws. To install the transient protection board

in the field, perform the appropriate procedure.

NOTE

In order to maintain hazardous locations approvals, transient

protection boards must be installed at a Rosemount Service Center. All

approvals are void if customer installs transient protection boards.

INSTALLATION

PROCEDURES

Transient Protection

Board Installation

1. Remove the four screws on the transmitter terminal block. Save

the screws and the cable clamps.

2. Disconnect the power signal wires from the terminals.

3. Insert the transient protection board directly over the terminal

block, taking care to feed the power signal wires through the

access cutout at the top of the board, see Figure C-4.

4. Replace and tighten the terminal screws. Take care to adequately

tighten the ground (EGND) screw using the #8 lock washer

provided.

5. Reconnect the signal wires, see Figure C-4.

Transient Protection

Board Wiring

The Model 2088 terminal screws remain visible with a transient

protection board installed. Do not use the existing Model 2088 terminal

screws to power the transmitter; doing so will render the transient

protection board useless.

To power the low power transmitter with the transient protection board

installed, connect the positive power lead to the terminal marked “+” on

the transient protection board, and the negative power lead to the

center terminal screw on the transmitter terminal block. Connect the

positive lead from the readout device or A/D converter to the terminal

marked “S” on the transient protection board, and the negative lead to

the center terminal screw on the transmitter terminal block,

see Figure C-4.

C-7

Model 2088 Low Power Option

Figure C-4. 1–5 V dc Transient

Protection Wiring.

SPECIFICATIONS The specifications listed below are unique to the Option code M, Low

Power Analog Transmitter. All other specifications are identical to

those listed in Section 5 Specifications and Reference Data.

Functional Specifications

Output

1–5 V dc, low power. (Outputs are directly proportional to the

input pressure.)

Turn-on Time

0.3 seconds maximum at reference operating conditions.

Failure Mode

If self diagnostics detect a sensor or microprocessor failure, the

analog signal is driven low to alert the user (I ≤ 1V).

Performance

Specifications Ambient Temperature Effect

Total effect includes zero and span effects.

2088-1000B04B

Ground Terminal

Negative Terminal

Positive Terminal

Signal Wire Access Cutout

Signal Terminal

TABLE C-1. Ranges for Model 2088.

Range Minimum Span URL/Max. Span/Sensor Limit

0 1 psi (69 mbar) 8 psi (552 mbar)

1 3 psi (207 mbar) 30 psi (2,08 bar)

2 15 psi (1 bar) 150 psi (10,34 bar)

3 80 psi (5,5 bar) 800 psi (55,15 bar)

4 400 psi (27,6 bar) 4000 psi (275,79 bar)

Temperature Ranges 1–4 Range 0

–40 to 0 °F(–40 to –18 °C) ±(0.7% URL + 0.8% Span) ±(1.3% URL + 0.5% Span)

0 to 140 °F (–18 to 60°C) ±(0.5% URL + 0.5% Span) ±(1.0% URL + 0.5% Span)

140 to 185 °F (60 to 85°C) ±(0.7% URL + 0.8% Span) ±(1.3% URL + 0.5% Span)

Rosemount Model 2088/2090 Pressure Transmitters

C-8

Appendix

D-1

DApproval Drawings

OVERVIEW This section contains transmitter hazardous location installation

drawings. Follow the installation guidelines presented by these

drawings in order to maintain certified ratings for installed

transmitters.

This section contains the following drawings:

Rosemount Drawing 02088-1018, Rev. AB, 7 sheets:

Index of Intrinsic Safety Factory Mutual for Models 2088 and 2090.

Rosemount Drawing 02088-1024, Rev. AA, 3 sheets:

CSA Intrinsic Safety Approvals for Models 2088 and 2090.

Rosemount Model 2088/2090 Pressure Transmitters

D-2

FIGURE D-1. Index of Intrinsic Safety Factory Mutual for Models 2088 and 2090 Installation Drawing 02088-1018, Rev. AB.

2088-1018AB1

D-3

Approval Drawings

2088-1018AB2

Rosemount Model 2088/2090 Pressure Transmitters

D-4

2088-1018AB4

D-5

Approval Drawings

2088-1018AB5

Rosemount Model 2088/2090 Pressure Transmitters

D-6

2088-1018AB6

D-7

Approval Drawings

2088-1018AB6

Rosemount Model 2088/2090 Pressure Transmitters

D-8

2088-1018AB7

D-9

Approval Drawings

FIGURE D-2. CSA Intrinsic Safety Approvals for Models 2088 and 2090, Rev. AA.

2088-1024_01A

Rosemount Model 2088/2090 Pressure Transmitters

D-10

2088-1024_02A

D-11

Approval Drawings

2088-1024_03A

Rosemount Model 2088/2090 Pressure Transmitters

D-12

Appendix

E-1

EEuropean ATEX Directive

Information

Rosemount Model 2088, 2090P, and 2090F Smart Pressure

Transmitters that have the following label attached, have been certified

to comply with Directive 94/9/EC of the European Parliament and the

Council as published in the Official Journal of the European

Communities No. L 100/1 on 19 April 1994.

The following information is provided as part of the labeling of the

transmitter

• Name and address of the manufacturer (may be any of

the following):

•Rosemount USA

•Rosemount England

•Rosemount Germany

•Rosemount Singapore

• Complete model number

• The serial number of the device

• Year of construction

• Marking for explosion protection:

•EExdIICT6(Ta=40°C)

•EExdIICT4(Ta=80°C)

• KEMA ATEX certificate number: 97ATEX 2378

275_01A

0600

II 1/2 G

Rosemount Model 2088/2090 Pressure Transmitters

E-2

I-1

Index

Access requirements 3-6

Action keys B-5

Address 2-11

Approval Drawings D-1–D-5

Basic setup

Damping 2-4

Output units 2-3

Rerange 2-3

Tag 2-3

Burst mode 2-5

Calibration 2-6

Full trim 2-8

Output trim 2-8

Overview 2-6

Sensor trim 2-7

Zero trim 2-7

Commissioning the Smart

transmitter 2-2

Communicating with a multidrop

2-11

Configuration data

Clone 2-6

Recall 2-6

Save 2-6

Connecting to a transmitter loop

2-2

Custom meter configuration A-2

Damping 2-4

Detailed setup

Burst mode 2-5

Clone configuration data 2-6

Meter setup 2-5

Save, recall, clone

configuration data 2-6

Diagnostics and service 2-10

Dimensional drawings

Model 2088 3-6

Model 2090F 3-6

Model 2090P 3-6

Mounting bracket 3-6

Disassembly procedure 4-5

Downscale alarm 4-4

Drawings

Approval D-1

Electrical considerations 3-11

Load limitations 3-11

Power supply 3-11

Environmental considerations 3-3

European ATEX directive

information E-1

Failure mode alarm 3-12

Field wiring 3-11

Low power C-2

Full trim 2-8

Functional specifications 5-1

HART communicator B-1

Action keys B-5, B-6

Data entry B-6

Function keys B-6

Model 275 B-1

Hazardous locations 3-3

Impulse piping 3-5

Installation

Electrical considerations 3-11

Environmental

considerations 3-3

General considerations 3-3

Hazardous locations 3-3

Mechanical considerations 3-

Introduction 1-1

Keypad

Action keys B-5, B-6

Function keys B-6

LCD meter

Custom meter configuration

A-2

Diagnostic messages A-3

Load limitations 3-11

Low power option

Calibration C-3

Commissioning C-1

Installation C-1

Potentiometer

adjustment C-4

Setting span C-5

Setting zero C-4

Specifications C-7

Transient protection C-6

Wiring C-2

Maintenance 4-1

Disassembly procedure 4-5

Reassembly procedure 4-5

Returning product 4-6

Mechanical considerations 3-4

Meter setup 2-5

Model 2090F 3-10

Model 2090P 3-7

Model 275 HART

communicator B-1

Mounting

Model 2088 3-4

Model 2090F 3-4

Model 2090P 3-4

Mounting configurations 3-4

Using a sanitary fitting 3-10

Using a weld spud 3-9

Multidrop communication 2-10

NAMUR-compliant

operation 3-12

Ordering information 5-10

Model 2088 5-10

Model 2090F 5-12

Model 2090P 5-11

Output trim 2-8

Output units 2-3

Performance specifications 5-3

Physical specifications 5-5

Polling a multidrop loop 2-11

Potentiometer adjustment C-4

Power supply 3-11

I-2

Rosemount Model 2088/2090 Pressure Transmitters

Range values 2-4

Reassembly procedure 4-5

Reference data 5-1

Replacement parts

Model 2088 5-7

Model 2090F 5-9

Model 2090P 5-8

Rerange 2-3

Returning product 4-6

Safety messages 1-1

Security (Write protection) 3-13

Security jumpers 3-12

Sensor Trim 2-7

Sensor trim

Full trim 2-8

Zero trim 2-7

Set sensor type 2-3

Spare parts 5-7

Specifications 5-1

Functional 5-1

Performance 5-3

Physical 5-5

Tag 2-3

Transient protection C-6

Troubleshooting 4-1

Weld spud 3-8

Wiring 3-11

Low power C-2

Zero and span adjustments 3-14

Zero trim 2-7

00809-0100-4690 Rev. DA 01/00

http://www.rosemount.com

¢00809-0100-4690D¤

Rosemount Inc.

8200 Market Boulevard

Chanhassen, MN 55317 USA

Tel 1-800-999-9307

Fax (612) 949-7001

Fisher-Rosemount Limited

Heath Place

Bognor Regis

West Sussex PO22 9SH

England

Tel 44 (1243) 863 121

Fax 44 (1243) 867 5541

Fisher-Rosemount

Singapore Pte Ltd.

1 Pandan Crescent

Singapore 128461

Tel (65) 777-8211

Fax (65) 770-8007

4690man

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