Rosemount 248DX Wireless Industial Temperature Transmitter User Manual 00809 0300 4248 RevAA

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Reference Manual
00809-0300-4248, Rev AA
July 2014
Rosemount 248 Wireless Temperature
Transmitter
Reference Manual
00809-0300-4248, Rev AA
Rosemount 248 Wireless
Temperature Transmitter
Rosemount 248 Hardware Revision
HART® Device Revision
Field Communicator Field Device Revision
Dev 1, DD v1
NOTICE
Read this manual before working with the product. For personal and system safety, and for
optimum product performance, make sure to thoroughly understand the contents before
installing, using or maintaining this product.
For technical assistance, contacts are listed below:
Customer Central
Technical support, quoting, and order-related questions.
United States - 1-800-999-9307 (7:00 am to 7:00 pm CST)
Asia Pacific- 65 777 8211
Europe/ Middle East/ Africa - 49 (8153) 9390
North American Response Center
Equipment service needs
1-800-654-7768 (24 hours—includes Canada)
Outside of these areas, contact your local Emerson Process Management representative.
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 a Emerson Process
Management Sales Representative.
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Reference Manual
00809-0300-4248, Rev AA
Failure to follow these installation guidelines could result in death or serious injury:

Make sure only qualified personnel perform the installation.
Explosions could result in death or serious injury:
Installation of this transmitter in an explosive environment must be in accordance with
the appropriate local, national, and international standards, codes, and practices.
Please review the approvals section of the 248 reference manual for any restrictions
associated with a safe installation.

Before connecting a Field Communicator in an explosive atmosphere, ensure the
instruments 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.
Process leaks may cause harm or result in death.

Do not remove the thermowell while in operation.

Install and tighten thermowells and sensors before applying pressure.
Electrical shock can result in death or serious injury.

Avoid contact with the leads and terminals. High voltage that may be present on leads
can cause electrical shock.
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following conditions:

This device may not cause harmful interference.
This device must accept any interference received, including interference that may
cause undesired operation.

This device must be installed to ensure a minimum antenna separation distance of 20
cm from all persons.
The Power Module may be replaced in a hazardous area. The Power Module has surface
resistivity greater than one gigaohm and must be properly installed in the wireless device
enclosure. Care must be taken during transportation to and from the point of installation to
prevent electrostatic charge build-up.


NOTICE
The Rosemount 248 Wireless and all other wireless devices should be installed only after the
Smart Wireless Gateway has been installed and is functioning properly. Wireless devices
should also be powered up in order of proximity from the Smart Wireless Gateway,
beginning with the closest. This will result in a simpler and faster network installation.
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NOTICE
Shipping considerations for wireless products (Lithium Batteries: Green Power
Module, model number 701PGNKF):
The unit was shipped to you without the Power Module installed. Please remove the Power
Module prior to shipping the unit.
Each Power Module contains one “D” size primary lithium-thionyl chloride battery. Primary
lithium batteries are regulated in transportation by the U. S. Department of Transportation,
and are also covered by IATA (International Air Transport Association), ICAO (International
Civil Aviation Organization), and ARD (European Ground Transportation of Dangerous
Goods). It is the responsibility of the shipper to ensure compliance with these or any other
local requirements. Please consult current regulations and requirements before shipping.
NOTICE
Power Module Considerations:
The power module with the wireless unit contains one “D” size primary lithium-thionyl
chloride battery (Green Power Module, model number 701PGNKF). Each battery contains
approximately 5.0 grams of lithium. Under normal conditions, the battery materials are
self-contained and are not reactive as long as the batteries and the pack integrity are
maintained. Care should be taken to prevent thermal, electrical or mechanical damage.
Contacts should be protected to prevent premature discharge.
Battery hazards remain when cells are discharged.
Power Modules should be stored in a clean and dry area. For maximum Power Module life,
storage temperature should not exceed 30 °C.
Reference Manual
Table of Contents
00809-0300-4248, Rev AA
July 2014
Contents
1Section 1: Introduction
1.1 Using this manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2.1 Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.3 Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3.2 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3.3 Mechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.3.4 Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.3.5 Environmental . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.4 Service support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.5 Product recycling/disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2Section 2: Configuration
2.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2.1 Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3 Sensor connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.4 Bench top configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
2.5 Device network configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
2.5.1 Join to network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
2.5.2 Configure update rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
2.5.3 HART menu tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
2.5.4 Fast Key sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
2.5.5 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
2.6 Remove power module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
3Section 3: Installation
3.1 Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
3.1.1 Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
3.2 Wireless consideration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
3.2.1 Power up sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
3.2.2 Internal antenna position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
3.3 Field Communicator connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
3.4 Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
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3.5 Physical installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
3.5.1 Direct mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
3.5.2 Remote mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
4Section 4: Commissioning
4.1 Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
4.1.1 Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
4.2 Verify operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
4.2.1 Field Communicator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
4.2.2 Emerson Smart Wireless Gateway . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
4.3 AMS™ Wireless Configurator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
4.4 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
4.5 Reference information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
5Section 5: Operation and Maintenance
5.1 Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
5.1.1 Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
5.2 Power module replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
5.3 LCD screen messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
5.3.1 Startup screen sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
6Section 6: Troubleshooting
6.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
6.2 Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
6.2.1 Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
AAppendix A: Specifications and Reference Data
A.1 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
A.1.1 Functional specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
A.1.2 Physical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
A.1.3 Performance specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
A.1.4 Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
A.1.5 Ambient temperature effect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
A.1.6 Lead wire resistance effect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
A.2 Dimensional drawings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
A.3 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
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July 2014
BAppendix B: Product Certifications
B.1 Approved Manufacturing Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
B.2 European Directive Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
B.3 Ordinary Location Certification from FM Approvals . . . . . . . . . . . . . . . . . . . . . . . .47
CAppendix C: Mapping for non-DD based Integration with Host
Systems
C.1 Mapping of alert messages in the HART command 48 additional status . . . . . .49
C.2 Mapping of device variables index numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
Table of Contents
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Table of Contents
July 2014
Reference Manual
00809-0300-4248, Rev AA
Table of Contents
Section 1: Introduction
Reference Manual
July 2014
00809-0300-4248, Rev AA
Section 1
1.1
Introduction
Using this manual
The sections in this manual provide information on installing, operating, and maintaining the
Rosemount 248 Wireless temperature transmitter with WirelessHART® protocol. The sections
are organized as follows:

Section 2: Configuration provides instruction on commissioning and operating 248
Wireless transmitters. Information on software functions, configuration parameters,
and on line variables is also included.

Section 3: Installation contains mechanical and electrical installation instructions.

Section 4: Commissioning contains techniques for properly commissioning the device.

Section 5: Operation and Maintenance contains operation and maintenance
techniques.

Section 6: Troubleshooting provides troubleshooting techniques for the most common
operating problems.

Appendix A: Specifications and Reference Data supplies reference and specification
data, as well as ordering information.

Appendix B: Product Certifications contains approval information.

Appendix C: Mapping for non-DD based Integration with Host Systems
Rosemount 248 Wireless Transmitter
Features of the Rosemount 248 Wireless include:

An installation-ready solution that provides a variety of mounting options, transmitter
configurations, and sensors/thermowells

Flexibility to meet your most demanding applications

Wireless output with >99% data reliability delivers rich HART data, protected by
industry leading security

Simple and easy installation practices already used today for robust installations
Refer to the following literatures for a full range of compatible connection heads, sensors, and
thermowells provided by Emerson Process Management.
Introduction

English Temperature Sensors and Assemblies Product Data Sheet, Volume 1 (document
number 00813-0100-2654)

Temperature Sensors and Accessories (Metric Sensors) Product Data Sheet, Volume 2
(document number 00813-0200-2654)
Section 1: Introduction
1.2
Reference Manual
00809-0300-4248, Rev AA
July 2014
Safety messages
Instructions and procedures in this section may require special precautions to ensure the safety
of the personnel performing the operations. Information that potentially raises safety issues is
indicated by a warning symbol ( ). Please refer to the following safety messages before
performing an operation preceded by this symbol.
1.2.1
Warnings
Failure to follow these installation guidelines could result in death or serious injury.

Make sure only qualified personnel perform the installation.
Explosions could result in death or serious injury.
Before connecting a Field Communicator in an explosive atmosphere, make sure the
instruments 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.
Process leaks could result in death or serious injury.

Do not remove the thermowell while in operation.

Install and tighten thermowells and sensors before applying pressure
Electrical shock could cause death or serious injury.

Avoid contact with the leads and terminals. High voltage that may be present on leads
can cause electrical shock.
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following conditions.

This device may not cause harmful interference.
This device must accept any interference received, including interference that may
cause undesired operations.

This device must be installed to ensure a minimum antenna separation distance of 20
cm from all person.
The Power Module may be replaced in a hazardous area. The Power Module has surface
resistivity greater than one gigaohm and must be properly installed in the wireless device
enclosure. Care must be taken during transportation to and from the point of installation to
prevent electrostatic charge build-up.


Introduction
Reference Manual
00809-0300-4248, Rev AA
1.3
Considerations
1.3.1
General
Section 1: Introduction
July 2014
Electrical temperature sensors such as RTDs and thermocouples produce low-level signals
proportional to their sensed temperature. With simple HART configuration, the Rosemount 248
Wireless converts the low-level sensor signal to a wireless-enabled signal.
1.3.2
Commissioning
The transmitter can be commissioned before or after installation. It may be useful to
commission it on the bench, before installation, to ensure proper operation and to become
familiar with its functionality. When applicable, make sure the instruments are installed in
accordance with intrinsically safe or non-incendive field wiring practices. The device will be
powered whenever the power module is installed. To avoid depleting the Power Module, make
sure it is removed when the device is not in use.
Power up sequence
The Power Module should not be installed on any wireless device until the Smart Wireless
Gateway is installed and functioning properly. This transmitter uses the Green Power Module
(order model number 701PGNKF). Wireless devices should also be powered up in order of
proximity from the Smart Wireless Gateway, beginning with the closest. This will result in a
simpler and faster network installation. Enable Active Advertising on the Gateway to ensure that
new devices join the network faster. For more information, see the Smart Wireless Gateway
Manual (Doc. No. 00809-0200-4420).
Internal antenna position
The internal antenna is designed for multiple mounting orientations. The transmitter should be
mounted according to best practices for your temperature measurement application. The
antenna should be approximately 3 ft (1 m) from any large structure or building to allow clear
communication to other devices.
Network design best practices
When mounting the device, recommended practices should be considered to achieve the best
wireless performance. See “Mounting” on page 23 for more information on recommended
practices.
Field Communicator connections
The Power Module needs to be installed in the device for the Field Communicator to interface
with the Rosemount 248 Wireless Temperature Transmitter. The Field Communicator
connections are located on the Power Module. To communicate to the transmitter, connect the
Field Communicator to the COMM port connections on the Power Module. This transmitter uses
the Green Power Module; please order model number 701PGNKF. Field communication with
this device requires a HART-based Field Communicator using the correct Rosemount 248
Wireless DD. The Power Module is keyed and can only be inserted in one orientation. Refer to
Figure 3-1 for instructions on connecting the Field Communicator to the 248.
Introduction
Section 1: Introduction
1.3.3
Reference Manual
00809-0300-4248, Rev AA
July 2014
Mechanical
Location
When choosing an installation location and position, take into account the need for access to
the mesh network, access to the transmitter and to the power module compartment for ease
power module replacement.
Electronics cover
The electronics cover is tightened so that polymer contacts polymer. When removing the
electronics cover, ensure that there is no damage done to the o-ring. If damaged replace before
reattaching cover, ensuring polymer contacts polymer (i.e. no o-ring visible).
1.3.4
Electrical
Power Module
The Rosemount 248 Wireless Temperature transmitter is self-powered. The Power Module
contains a primary lithium-thionyl chloride battery (Green Power Module, model number
701PGNKF). Each battery contains approximately 5 grams of lithium. Under normal conditions,
the battery materials are self-contained and are not reactive as long as the battery and the
Power Module are maintained. Care should be taken to prevent thermal, electrical, or
mechanical damage. Contacts should be protected to prevent premature discharge.
Use caution when handling the power module, it may be damaged if dropped from heights in
excess of 20 feet.
Battery hazards remain when cells are discharged.
Power Modules should be stored in a clean and dry area. For maximum Power Module life,
storage temperature should not exceed 30 °C.
Sensor
Make sensor connections with the threaded 1/2-inch. NPT connection sensor adapter.
1.3.5
Environmental
Verify that the operating atmosphere of the transmitter is consistent with the appropriate
hazardous locations certifications.
Temperature effects
The transmitter will operate within specifications for ambient temperatures between –40 and
185 °F (–40 and 85 °C). Heat from the process is transferred from the thermowell to the
transmitter housing. If the expected process temperature is near or beyond specification limits,
consider the use of additional thermowell and extension, or remote mounting the transmitter
to thermally isolate it from the process.
Introduction
Reference Manual
Section 1: Introduction
00809-0300-4248, Rev AA
July 2014
Temperature limits
1.4
Operating limit
Storage limit
–40 to 185 °F
–40 to 185 °F
–40 to 85 °C
–40 to 85 °C
Service support
To expedite the return process outside of the United States, contact the nearest Emerson
Process Management representative.
Within the United States, call the Emerson Process Management Instrument and Valves
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 the following information:

Product model

Serial numbers

The last process material to which the product was exposed
The center will provide:

A Return Material Authorization (RMA) number

Instructions and procedures that are necessary to return goods that were exposed to
hazardous substances
Individuals who handle products exposed to a hazardous substance can avoid injury if they
are informed of and understand the hazard. 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.
Note
If the device has been exposed to a hazardous substance, a Material Safety Data Sheet (MSDS)
must be included with the returned materials. An MSDS is required by law to be available to
people exposed to specific hazardous substances.
Introduction
Section 1: Introduction
Reference Manual
00809-0300-4248, Rev AA
July 2014
NOTICE
Shipping considerations for wireless products (Lithium Batteries: Green Power
Module, model number 701PGNKF):
The unit was shipped to you without the Power Module installed. Please remove the Power
Module prior to shipping the unit.
Each power module contains a primary lithium-thionyl chloride battery. Primary lithium
batteries are regulated in transportation by the U. S. Department of Transportation, and
are also covered by IATA (International Air Transport Association), ICAO (International Civil
Aviation Organization), and ARD (European Ground Transportation of Dangerous Goods). It
is the responsibility of the shipper to ensure compliance with these or any other local
requirements. Please consult current regulations and requirements before shipping.
1.5
Product recycling/disposal
Recycling of equipment and packaging should be taken into consideration and disposed of in
accordance with local and national legislation/regulations.
Introduction
Section 2: Configuration
Reference Manual
July 2014
00809-0300-4248, Rev AA
Section 2
Configuration
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sensor connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bench top configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Device network configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HART menu tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1
page 7
page 7
page 8
page 9
page 12
page 14
page 15
Overview
This section contains information on configuration and verification that should be performed
prior to installation.
Field Communicator and AMS instructions are given to perform configuration functions. For
convenience, Field Communicator fast key sequences are labeled “Fast Keys” for each software
function below the appropriate headings.
Sensor Input Trim example
Fast Key sequence
2.2
1, 2, 3, etc.
Safety messages
Instructions and procedures in this section may require special precautions to ensure the safety
of the personnel performing the operations. Information that potentially raises safety issues is
indicated by a warning symbol ( ). Please refer to the following safety messages before
performing an operation preceded by this symbol.
Electrical grounds are indicated on drawings by a ground symbol ( ). Always follow proper
grounding practices.
Configuration
Reference Manual
Section 2: Configuration
00809-0300-4248, Rev AA
July 2014
2.2.1
Warnings
Failure to follow these installation guidelines could result in death or
serious injury.
Make sure only qualified personnel perform the installation.
Explosions could result in death or serious injury.

Before connecting a Field Communicator in an explosive atmosphere, make sure the
instruments 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.
Process leaks could result in death or serious injury.

Do not remove the thermowell while in operation.
Install and tighten thermowells and sensors before applying pressure
Electrical shock could cause death or serious injury.


Avoid contact with the leads and terminals. High voltage that may be present on leads
can cause electrical shock.
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following conditions:





This device may not cause harmful interference.
This device must accept any interference received, including interference that may
cause undesired operation.
This device must be installed to ensure a minimum antenna separation distance of 20
cm from all persons.
The Power Module may be replaced in a hazardous area. The Power Module has
surface resistivity greater than one gigaohm and must be properly installed in the
wireless device enclosure. Care must be taken during transportation to and from the
point of installation to prevent electrostatic charge build-up.
Configuration
Reference Manual
Section 2: Configuration
00809-0300-4248, Rev AA
2.3
July 2014
Sensor connections
The 248 Wireless is compatible with a number of RTD and thermocouple sensor types.
Figure 2-1 shows the correct input connections to the sensor terminals on the transmitter. To
ensure a proper sensor connection, anchor the sensor lead wires into the appropriate
compression terminals and tighten the screws.
Thermocouple or Millivolts inputs
The thermocouple can be connected directly to the transmitter. Use appropriate thermocouple
extension wire if mounting the transmitter remotely from the sensor.
RTD or Ohm inputs
The transmitters will accept a variety of RTD or ohmic configurations, including 2-wire, 3-wire or
4-wire connections. If the transmitter is mounted remotely from a 3-wire or 4-wire RTD, it will
operate within specifications, without recalibration, for lead wire resistances of up to 5 ohms
per lead (equivalent to 500 feet of 20 AWG wire). In this case, the leads between the RTD and
transmitter should be shielded. If using a 2-wire connection, both RTD leads are in series with
the sensor element, so significant errors can occur if the lead lengths exceed three feet of 20
AWG wire (approximately 0.05 C/ft.). For longer runs, attach a third or fourth lead to achieve a
3-wire or 4-wire connection as described above.
Effect-RTD input
Since the lead wires are part of the RTD circuit, the lead wire resistance needs to be
compensated for to achieve the best accuracy. This becomes especially critical in applications
where long sensor and/or lead wires are used. There are three lead wire configurations
commonly available. In a two-wire configuration there can be no compensation for lead wire
resistance since the lead wires are in series with the element and appear to the transmitter as
part of the sensor's resistance causing inherent accuracy degradation. In a three-wire
configuration, compensation is accomplished using the third wire with the assumption that it
will be the same resistance as the other two wires and the same compensation is applied to all
three wires. A four-wire design is ideal because the lead wire resistance is inconsequential to the
measurement. It uses a measurement technique where a very small constant current of about
150 micro amps is applied to the sensor through two leads and the voltage developed across
the sensor is measured over the other two wires with a high-impedance and high resolution
measuring circuit. In accordance with Ohm's Law, the high impedance virtually eliminates any
current flow in the voltage measurement leads and therefore the resistance of the leads is not a
factor.
Table 2-1. Examples of Approximate Basic Error
Sensor input
Approximate basic error
4-wire RTD
Negligible(1)
3-wire RTD
Error in reading is equivalent to unbalanced lead wire resistance(2)
2-wire RTD
Error in reading is equivalent to total lead wire resistance
(1) Independent of lead wire resistance up to 5 per lead.
(2) Unbalanced lead wire resistance is the maximum resistance differences between any two leads.
Configuration
Reference Manual
Section 2: Configuration
00809-0300-4248, Rev AA
July 2014
Figure 2-1. Sensor Wiring Diagrams
248 Wireless sensor connections diagram
1 2 3 4
2-wire RTD and 
1 2 3 4
3-wire RTD and 
1 2 3 4
4-wire RTD and 
1 2 3 4
T/C and mV
Note
Emerson Process Management provides 4-wire sensors for all single element RTDs. Use these
RTDs in 3-wire or 2-wire configurations by leaving the unneeded leads disconnected and
insulated with electrical tape.
Figure 2-2. Rosemount 65, 68Q, 78 Standard and High Temp, 58C and 68 RTD Lead Wire
Configurations
Single element
A. White (1)
B. White (2)
C. Red (3)
D. Red (4)
Figure 2-3. Rosemount 183 Thermocouple Lead Wire Configuration
Type J
Type E
+ A
+ E
– B
– F
Type K
A. White (2)
B. Red (3)
C. Yellow (2)
D. Red (3)
10
Type T
+ C
+ G
– D
– H
E. Purple (2)
F. Red (3)
G. Blue (2)
H. Red (3)
Configuration
Reference Manual
Section 2: Configuration
00809-0300-4248, Rev AA
July 2014
Figure 2-4. Rosemount 185 Thermocouple Lead Wire Configurations
Type J
Type N
+ A
+ E
– B
– F
Type K
+ C
– D
A. Black (2)
B. White (3)
C. Green (2)
D. White (3)
E. Red (2)
F. White (3)
Note
Wire color examples apply to Rosemount sensors, but will vary by manufacturer.
Sensor leads
If the sensor is installed in a high-voltage environment and a fault condition or installation error
occurs, the sensor leads and transmitter terminals could carry lethal voltages. Use extreme
caution when making contact with the leads and terminals.
Use the following steps to wire the sensor and supply power to the transmitter:
Configuration
1.
Remove the transmitter enclosure cover (if applicable).
2.
Attach the sensor leads according to the wiring diagrams.
3.
Connect the Power Module.
4.
Verify the connection.
5.
Reattach and tighten the cover (if applicable).
11
Section 2: Configuration
2.4
Reference Manual
00809-0300-4248, Rev AA
July 2014
Bench top configuration
Bench top configuration requires a Field Communicator, AMS, or any WirelessHART
Communicator. Connect the Field Communicator leads to the terminals labeled “COMM” on the
Power Module.
Bench top configuration consists of testing the transmitter and verifying transmitter
configuration data. 248 Wireless transmitters must be configured before installation.
Configuring the transmitter on the bench before installation using a Field Communicator, AMS,
or any WirelessHART Communicator ensures that all network settings are working correctly.
When using a Field Communicator, any configuration changes made must be sent to the
transmitter by using the Send key (F2). AMS configuration changes are implemented when the
Apply button is clicked.
Field Communicator
If performing device configuration directly, connect the bench equipment and turn on the Field
Communicator by pressing the ON/OFF key. When using a Field Communicator, any
configuration changes must be sent to the transmitter by using the Send key (F2).
The Field Communicator will search for a HART-compatible device and indicate when the
connection is made. If the Field Communicator fails to connect, it will indicate that no device
was found. If this occurs, refer to Section 6: Troubleshooting.
AMS™ Device Manager and AMS Wireless Configurator
When configuring the Rosemount 248 Wireless using AMS Device Manager or AMS Wireless
Configurator, double click the Rosemount 248 Wireless device icon (or right click and select
Con/Setup), then choose the Configure Menu. AMS configuration changes are implemented
when the Apply button is clicked.
During direct connection configuration, AMS will search for a HART-compatible device and
indicate when the connection is made. If AMS fails to connect, it indicates that no device was
found. If this occurs, refer to Section 6: Troubleshooting.
Emerson Smart Wireless Gateway
The Rosemount 248 Wireless supports limited remote configuration through the Smart
Wireless Gateway. The Gateway allows configuration of the following device parameters: HART
Tag, Short Tag, Descriptor, Engineering Units, Update Rate and Range Values.
12
Configuration
Reference Manual
Section 2: Configuration
00809-0300-4248, Rev AA
July 2014
Device sensor configuration
Every temperature sensor has unique characteristics. In order to ensure the most accurate
measurement, the Rosemount 248 Wireless should be configured to match the specific sensor
that it will be connected to. Prior to installation, verify the configuration and connection
settings of the temperature sensor through a Field Communicator or AMS.
Default settings
The Rosemount 248 Wireless default configuration is shown below:
Sensor Type
Pt 100 (= 0.00385)
Engineering Units
°C
Number of Lead Wires
Network ID
Factory Generated Network Parameters
Join Key
Factory Generated Network Parameters
Update Rate
1 Minute
Note
The C1 option code can be used to enable factory configuration of the Update Rate, Date,
Descriptor and Message fields. This code is not required to have the factory configure the
Sensor Type, Connection or the Self Organizing Network parameters.
Configuration
13
Reference Manual
Section 2: Configuration
00809-0300-4248, Rev AA
July 2014
2.5
Device network configuration
2.5.1
Join to network
Fast Keys
2, 1, 1
In order to communicate with the Smart Wireless Gateway, and ultimately the Host System, the
transmitter must be configured to communicate over the wireless network. This step is the
wireless equivalent of connecting wires from a transmitter to the host system.
1.
From the Home screen, choose 2: Configure.
2.
Choose 1: Guided Setup.
3.
Choose 1: Join to Network.
Using a Field Communicator or AMS to communicate with the transmitter, enter the Network ID
and Join Key so they match the Network ID and Join Key of the Smart Wireless Gateway and the
other devices in the network. If the Network ID and Join Key are not identical to those set in the
Gateway, the transmitter will not communicate with the network. The Network ID and Join Key
may be obtained from the Smart Wireless Gateway on the Setup>Network>Settings page on
the web server.
2.5.2
Configure update rate
Fast Keys
2, 1, 2
The Update Rate is the frequency at which a new measurement is taken and transmitted over
the wireless network. This by default is 1 minute. This may be changed at commissioning, or at
any time via AMS. The Update Rate is user selectable from 1 second to 60 minutes.
1.
From the Home screen, choose 2: Configure.
2.
Choose 1: Guided Setup.
3.
Choose 2: Configure Update Rate.
When device configuration is completed, remove the Power Module and replace the housing
cover.
14
Configuration
Reference Manual
Section 2: Configuration
00809-0300-4248, Rev AA
2.5.3
July 2014
HART menu tree
Figure 2-5. Field Communicator Menu Tree: Overview
Device Status
1. Refresh Alerts
2. No Active Alerts
3. F: Electrical Failure
4. F: Terminal Block Failure
5. F: Sensor Failure
6. F: Radio Failure
7. F: Supply Voltage Failure
8. M: Electronics Warning
9. M: Sensor has Exceeded Limits
10. M: Electronics Temperature
has Exceeded Limits
11. M: Terminal Temperature
has Exceeded Limits
12. M: Supply Voltage Low
13. A: Database Memory Warning
14. A: Invalid Configuration
15. A: Hi Hi Alarm
16. A: Hi Alarm
17. A: Lo Alarm
18. A: Lo Lo Alarm
19. A: Simulation Active
Home
1. Overview
2. Configure
3. Service Tools
Overview
1. Device Status
2. Comm Status
3. Sensor Value
4. Sensor Status
5. Update Rate
6. Join to Network
7. Device Information
If no Active Alerts present, display text will be
“No Active Alerts”
Device Information
1. Identification
2. Revisions
3. Radio
4. Security
Identification
1. Device Image
2. Tag
3. Long Tag
4. Model
5. Final Assembly Number
6. Date
7. Description
8. Message
9. Model Numbers
Model Numbers
1. Model Numbers I
2. Model Numbers II
3. Model Numbers III
Revisions
1. Universal
2. Field Device
3. Software
4. Hardware
5. DD Revision
Radio
1. MAC Address
2. Manufacturer
3. Device Type
4. Device Revision
5. Software Revision
6. Hardware Revision
7. Transmit PWR Lvl
8. Min Brdcst Updt Rt
Security
1. Write Protect
2. Lock Status
3. Over the Air Upgrade
Configuration
15
Reference Manual
Section 2: Configuration
00809-0300-4248, Rev AA
July 2014
Figure 2-6. Field Communicator Menu Tree: Configure
Wireless
1. Network ID
2. Join to Network
3. Broadcast Info
Guided Setup
1. Join to Network
2. Configure Update Rate
(2. Configure Adv Brdcsg)
3. Configure Sensor
4. Configure Process Alarm
5. Configure Device Display
6. Calibrate Sensor
Home
1. Overview
2. Configure
3. Service Tools
Configure
1. Guided Setup
2. Manual Setup
3. Alert Setup
Manual Setup
1.Wireless
2. Sensor
3. Percent of Range
4. Display
5. HART
6. Device Temperature
7. Terminal Temperature
8. Device Information
9. Power
10. Security
Alert Setup
1. Hi-Hi Alarm
2. Hi Alarm
3. Lo Alarm
4. Lo-Lo Alarm
Percent of Range
1. % of Range
2. % of Range Status
3. Upper Range Value
4. Lower Range Value
5. Primary Variable
6. Maximum
7. Minimum
Display
1. Display Mode
2. Display Items
HART
1. Meas Status Log
2. Configure Data Hist
Sensor
1. Sensor Value
2. Sensor Status
3. Type
4. Connection
5. Units
6. Serial Number
7. RTD 2 Wire Offset
8. Maximum
9. Minimum
Display Items
1. Sensor
2. Percent of Range
3. Terminal Temperature
4. Electronics Temperature
5. Supply Voltage
Device Temperature
1. Electronics Temp
2. Elect Temp Status
3. Units
4. Maximum
5. Minimum
Terminal Temperature
1. Terminal Temp
2. Terminal Temp Status
3. Units
4. Maximum
5. Minimum
Device Information
1. Tag
2. Long Tag
3. Descriptor
4. Message
5. Date
6. Country
7. SI Unit Control
Power
1. Power Mode
2. Power Source
3. AC Power Filter
Security
1. Write Protect
2. Lock Status
3. Lock/Unlock
4.Over the Air Upgrade
16
Configuration
Reference Manual
Section 2: Configuration
00809-0300-4248, Rev AA
July 2014
Figure 2-7. Field Communicators Menu Tree: Service Tools
Home
1. Overview
2. Configure
3. Service Tools
Device Status
1. Refresh Alerts
2. No Active Alerts
3. F: Electrical Failure
4. F: Terminal Block Failure
5. F: Sensor Failure
6. F: Radio Failure
7. F: Supply Voltage Failure
8. M: Electronics Warning
9. M: Sensor has Exceeded Limits
10. M: Electronics Temperature has Exceeded Limits
11. M: Terminal Temperature has Exceeded Limits
12. M: Supply Voltage Low
13. A: Database Memory Warning
14. A: Invalid Configuration
15. A: Hi Hi Alarm
16. A: Hi Alarm
17. A: Lo Alarm
18. A: Lo Lo Alarm
19. A: Simulation Active
20. History
Service Tools
1. Alerts
2. Variables
3. Trends
4. Communication
5. Maintenance
6. Simulate
Variables
1. Sensor Value
2. Sensor Status
3. % of Range
4. % of Range Status
5. Electronics Temp
6. Elect Temp Status
7. Supply Voltage
8. Supply Volt Status
9. Last Time Update
Trends
1. Data History
Communications
1. Join Status
2. Comm Status
3. Join Mode
4. Available Neighbors
5. Advertisement
6. Join Attempts
Maintenance
1. Routine Maintenance
2. Calibration
3. Reset/Restore
Simulate
1. Sensor
2. Electronics Temp
3. Supply Voltage
History
1. Clear Alert History
2. View Alert History
Data History
1. Device Variable
2. Variable Units
3. Sample Interval
4. Time of First Variable
5. Date of First Variable
6. View Data History
7. Refresh
Join Status
1. Signal Found
2. Signal Identified
3. Time Synchronized
4. Network Found
5. Join Requested
6. Access Granted
7. Network Joined
8. Bandwidth Rqstd
9. Join Complete
Routine Maintenance
1. Measurement History
2. Locate Device
3. Install New Power Module
Calibration
1. Sensor Value
2. Sensor Status
3. Current Lower Trim
4. Current Upper Trim
5. RTD 2 Wire Offset
6. Lower Sensor Trim
7. Upper Sensor Trim
8. Recall Factory Trim
Reset/Restore
1. Perform Master Reset
2. Restore Default Settings
Configuration
17
Reference Manual
Section 2: Configuration
00809-0300-4248, Rev AA
July 2014
2.5.4
Fast Key sequence
Table 2-2 lists the fast key sequences for common transmitter functions.
Note
The fast key sequences assume that DD Dev v1, DD v1 is being used.
Table 2-2. Rosemount 248 Wireless fast key sequence
Function
Key sequence
Device Information
1, 7
PV Range Values
2.5.5
2, 2, 3
Menu items
Identification, Revisions, Radio, Security
PV LRV, PV URV, LSL, USL
Lower Range Value
2, 2, 3, 4
Set the temperature for the 0% point to configure the
Percent of Range
Upper Range Value
2, 2, 3, 3
Set the temperature for the 100% point to configure
the Percent of Range
Sensor Trim (Calibration)
2, 1, 6, 1
Lower Sensor Trim, and Upper Sensor Trim
Wireless Network
2, 2, 1
Network ID, Join to Network, Broadcast Info
Sensor Configuration
2, 1, 3
Configure Sensor Type and Units, View Current Sensor
Configuration
Calibration
Calibrating the transmitter increases the measurement precision by allowing corrections to be
made to the factory-stored characterization curve by digitally altering the transmitter’s
interpretation of the sensor input.
To understand calibration, it is necessary to understand that smart transmitters operate
differently from analog transmitters. An important difference is that smart transmitters are factory-characterized, meaning that 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.
Calibration of the 248 Wireless may include the following procedure:

Sensor Input Trim: Digitally alter the transmitter’s interpretation of the input signal
Trim the transmitter
The Sensor Input Trim function may be used when calibrating.
Sensor calibration
Fast Keys
3, 5, 2
Perform a sensor trim if the transmitters digital value for the primary variable does not match
the plant’s standard calibration equipment. The sensor trim function calibrates the sensor to
the transmitter in temperature units or raw units. Unless your site-standard input source is
NIST-traceable, the trim functions will not maintain the NIST-traceability of the system.
18
Configuration
Reference Manual
Section 2: Configuration
00809-0300-4248, Rev AA
July 2014
The Sensor Input Trim command allows the transmitter’s interpretation of the input signal to be
digitally altered. The sensor reference command trims, in engineering(F, C,R, K) or raw(,
mV) units, the combined sensor and transmitter system to a site standard using a known
temperature source. Sensor trimming is suitable for validation procedures or for applications
that require calibrating the sensor and transmitter together.
Use the following procedure to perform a sensor trim with a 248 Wireless:
1.
Connect the calibration device or sensor to the transmitter. Refer to Figure 2-1 on
page 10 or on the device terminal block for sensor wiring diagrams.
2.
Connect the communicator to the transmitter.
3.
From the Home screen, select Service Tools, Maintenance, Calibration to prepare to
trim the sensor.
4.
Select 6 Lower Sensor Trim or 7 Upper Sensor Trim.
Note
It is recommended to perform lower offset trims first, before performing upper slope trims.
5.
Answer the question about configuring device for steady state sensor drive.
6.
Select the appropriate sensor trim units at the prompt.
7.
Adjust the calibration device to the desired trim value (must be within the selected
sensor limits). If a combined sensor and transmitter system are being trimmed, expose
the sensor to a known temperature and allow the temperature reading to stabilize. Use
a bath, furnace or isothermal block, measured with a site-standard thermometer, as the
known temperature source.
8.
Select OK once the temperature stabilizes. The communicator displays the output
value the transmitter associates with the input value provided by the calibration device.
9.
Accept new calibration.
AMS
For AMS, configure the sensor as indicated above.
Configuration
1.
From the Overview screen choose the Calibrate button.
2.
Choose Lower Input Trim or Upper Limit Trim.
3.
The wizard will continue through the process.
4.
The transmitter may be restored to the factory default by choosing:
Service Tools>Maintenance>Sensor Calibration>Recall Factory Trim.
5.
The wizard will revert the transmitter to the factory trim for a given sensor.
6.
Apply changes.
19
Section 2: Configuration
2.6
Reference Manual
00809-0300-4248, Rev AA
July 2014
Remove power module
After the sensor and network have been configured, remove the Power Module and replace the
module cover. The Power Module should be inserted only when the device is ready to be
commissioned. Use caution when handling the Power Module.
20
Configuration
Section 3: Installation
Reference Manual
July 2014
00809-0300-4248, Rev AA
Section 3
Installation
Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wireless consideration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Field Communicator connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Physical installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Direct mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1
page 21
page 22
page 22
page 23
page 23
page 24
page 24
Safety messages
Instructions and procedures in this section may require special precautions to ensure the safety
of the personnel performing the operations. Information that potentially raises safety issues is
indicated by a warning symbol ( ). Please refer to the following safety messages before
performing an operation preceded by this symbol.
3.1.1
Warnings
Failure to follow these installation guidelines could result in death or serious injury:

Make sure only qualified personnel perform the installation.
Explosions could result in death or serious injury:
Installation of this transmitter in an explosive environment must be in accordance
with the appropriate local, national, and international standards, codes, and practices.
Please review the approvals section of the 248 reference manual for any restrictions
associated with a safe installation.

Before connecting a Field Communicator in an explosive atmosphere, ensure the
instruments 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.
Process leaks may cause harm or result in death.

Do not remove the thermowells while in operation.

Install and tighten thermowells and sensors before applying pressure.
Electrical shock can result in death or serious injury.
Avoid contact with the leads and terminals. High voltage that may be present on leads can
cause electrical shock.

Installation
21
Section 3: Installation
Reference Manual
00809-0300-4248, Rev AA
July 2014
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following conditions:
This device may not cause harmful interference.

This device must accept any interference received, including interference that may
cause undesired operation.

This device must be installed to ensure a minimum antenna separation distance of 20
cm from all persons.
The Power Module may be replaced in a hazardous area. The Power Module has surface
resistivity greater than one gigaohm and must be properly installed in the wireless device
enclosure. Care must be taken during transportation to and from the point of installation to
prevent electrostatic charge build-up.

3.2
Wireless consideration
3.2.1
Power up sequence
The Rosemount 248 Wireless and all other devices should be installed only after the Smart
Wireless Gateway (“Gateway”) has been installed and is functioning properly. Wireless devices
should also be powered up in order of proximity from the Gateway, beginning with the closest.
This will result in a simpler and faster network installation. Enable Active Advertising on the
Gateway to ensure that new devices join the network faster. For more information see the
Emerson Smart Wireless Gateway Manual (Doc. No. 00809-0200-4420).
3.2.2
Internal antenna position
The internal antenna is designed for multiple mounting orientations. The transmitter should be
mounted according to best practices for your temperature measurement application. The
antenna should be approximately 3 ft (1 m) from any large structure or building to allow clear
communication to other devices.
3.3
Field Communicator connections
In order for the Field Communicator to interface with the Rosemount 248 Wireless Transmitter,
the Power Module must be connected. Refer to Figure 3-1 for a diagram on how to connect the
Field Communicator.
22
Installation
Reference Manual
Section 3: Installation
00809-0300-4248, Rev AA
3.4
July 2014
Mounting
The Rosemount 248 Wireless can be installed in one of two configurations: Direct Mount, where
the sensor is connected directly to the 248 Wireless housing’s conduit entry, or Remote Mount,
where the sensor is mounted separate from the 248 Wireless housing, then connected to the
248 Wireless via conduit. Choose the installation sequence that corresponds to the mounting
configuration.
Figure 3-1 provides an example of the relationship between transmitter housing temperature
rise and extension length.
Housing Temperature Rise, Above Ambient
°C (°F)
Figure 3-1. 248 Wireless Transmitter Temperature Rise vs. Extension Length
60 (140)
50 (122)
815 °C (1500 °F) Process Temperature
40 (104)
540 °C (1000 °F) Process Temperature
55
250 °C (482 °F) Process Temperature
30 (86)
20 (68)
10 (50)
0 (32)
4.2
Extension Length (in.)
Example
The transmitter specification limit is 85 °C. If the ambient temperature is 55 °C and the max
process temperature to be measured is 815 °C, the maximum permissible temperature rise is
the transmitter specification limit minus the ambient temperature (moves 85 to 55 °C), or 30 °C.
In this case, an extension of 5-in. meets this requirement, but 6-in. provides an additional
margin of thermowells protection, thereby reducing risk of ambient thermal damage.
3.5
Physical installation
The Rosemount 248 Wireless can be installed in one of two configurations: Direct Mount, where
the thermocouple or sensor is connected directly to the 248 Wireless housing’s conduit entry,
or Remote Mount, where the thermocouple or sensor is mounted separate from the 248
Wireless housing, then connected to the 248 Wireless via conduit. Choose the installation
sequence that corresponds to the mounting configuration.
Upon installation of the 248 Wireless, ensure that the conduit entry has an installed conduit
fitting or cable gland with approved thread sealant.
Installation
23
Reference Manual
Section 3: Installation
00809-0300-4248, Rev AA
July 2014
3.5.1
Direct mount
The direct mount installation should not be used when installing with a Swagelok® fitting.
1.
Install the sensor according to standard installation practices. Be sure to use an
approved thread sealant on all connections.
2.
Attach the 248 Wireless housing to the sensor using the threaded conduit entry.
3.
Attach the sensor wiring to the terminals as indicated on the wiring diagram.
4.
Connect the Green Power Module.
Note
Wireless devices should be powered up in order of proximity from the Smart Wireless Gateway,
beginning with the closest device to the Gateway. This will result in a simpler and faster network
installation.
3.5.2
5.
Provide 1.75 in. (45 mm) of clearance for units without an LCD display. Three inches of
clearance is required for cover removal if a meter is installed.
6.
Always ensure a proper seal by installing the electronics housing cover(s) so that
polymer contacts polymer (i.e. no o-ring visible). Use Rosemount O-rings.
Remote mount
1.
Install the sensor according to standard installation practices. Be sure to use an
approved thread sealant on all connections.
2.
Run wiring (and conduit, if necessary) from the sensor to the 248 Wireless.
3.
Pull the wiring through the threaded conduit entry of the 248 Wireless.
4.
Attach the sensor wiring to the terminals as indicated on the wiring diagram.
5.
Connect the Green Power Module.
Note
Wireless devices should be powered up in order of proximity from the Smart Wireless Gateway,
beginning with the closest device to the Gateway. This will result in a simpler and faster network
installation.
24
6.
Provide 1.75 in. (45 mm) of clearance for units without an LCD display. Three inches of
clearance is required for cover removal if a meter is installed.
7.
Always ensure a proper seal by installing the electronics housing cover(s) so that
polymer contacts polymer (i.e. no o-ring visible). Use Rosemount O-rings.
Installation
Section 4: Commissioning
Reference Manual
July 2014
00809-0300-4248, Rev AA
Section 4
Commissioning
Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Verify operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AMS™ Wireless Configurator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reference information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1
page 25
page 26
page 27
page 28
page 28
Safety messages
Instructions and procedures in this section may require special precautions to ensure the safety
of the personnel performing the operations. Information that potentially raises safety issues is
indicated by a warning symbol ( ). Please refer to the following safety messages before
performing an operation preceded by this symbol.
4.1.1
Warnings
Failure to follow these installation guidelines could result in death or serious injury:
Make sure only qualified personnel perform the installation.
Explosions could result in death or serious injury:

Installation of this transmitter in an explosive environment must be in accordance
with the appropriate local, national, and international standards, codes, and practices.
Please review the approvals section of the 248 reference manual for any restrictions
associated with a safe installation.

Before connecting a Field Communicator in an explosive atmosphere, ensure the
instruments 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.
Process leaks may cause harm or result in death.

Do not remove the thermowells while in operation.

Install and tighten thermowells and sensors before applying pressure.
Electrical shock can result in death or serious injury.

Avoid contact with the leads and terminals. High voltage that may be present on leads
can cause electrical shock.

Commissioning
25
Reference Manual
Section 4: Commissioning
00809-0300-4248, Rev AA
July 2014
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following conditions:
This device may not cause harmful interference.

This device must accept any interference received, including interference that may
cause undesired operation.

This device must be installed to ensure a minimum antenna separation distance of 20
cm from all persons.
The Power Module may be replaced in a hazardous area. The Power Module has surface
resistivity greater than one gigaohm and must be properly installed in the wireless device
enclosure. Care must be taken during transportation to and from the point of installation to
prevent electrostatic charge build-up.

Note
The Rosemount 248 Wireless and all other wireless devices should be installed only after the
Smart Wireless Gateway has been installed and is functioning properly.
Wireless devices should also be powered up in order of proximity from the Smart Wireless
Gateway, beginning with the closest device to the Gateway. This will result in a simpler and
faster network installation.
4.2
Verify operations
Operation can be verified in three locations: by using the Field Communicator, at the Smart
Wireless Gateway’s integrated web interface or via AMS™ Wireless Configurator.
4.2.1
Field Communicator
To verify operation using a Field Communicator, refer to the Fast Key Sequence in Table 4-1.
Select the Communication Status parameter to verify operation. For connecting a 248 Wireless
to a Field Communicator, refer to Figure 3-1 on page 23.
Table 4-1. 248 Wireless fast key sequence
Function
Communications
4.2.2
Key sequence
3, 4
Menu items
Join Status, Comm Status, Join Mode, Available Neighbors,
Advertisement, Join Attempts
Emerson Smart Wireless Gateway
In the integrated web interface from the Gateway, navigate to the Explorer>Status page. This
page shows whether the device has joined the network and if it is communicating properly.
Note
It may take several minutes for the device to join the network.
26
Commissioning
Reference Manual
00809-0300-4248, Rev AA
Section 4: Commissioning
July 2014
Note
If the device joins the network and immediately has an alarm present, it is likely due to sensor
configuration. Check the sensor wiring (see “Rosemount 248 Wireless Terminal Diagram” on
page 28) and the sensor configuration (see “248 Wireless fast key sequence” on page 26).
Figure 4-1. Smart Wireless Gateway Network Settings
4.3
AMS™ Wireless Configurator
When the device has joined the network, it will appear in the Wireless Configurator window as
illustrated below.
Commissioning
27
Reference Manual
Section 4: Commissioning
00809-0300-4248, Rev AA
July 2014
4.4
Troubleshooting
If the device is not joined to the network after power up, verify the correct configuration of the
Network ID and Join Key, and verify that Active Advertising has been enabled on the Smart
Wireless Gateway. The Network ID and Join Key in the device must match the Network ID and
Join Key of the Gateway.
The Network ID and Join Key may be obtained from the Gateway on the Setup>Network>Settings page on the web server (see Figure 4-1 on page 27). The Network ID and Join Key may be
changed in the wireless device by using the following Fast Key sequence.
Function
Key sequence
Menu items
2,1,1
Join to Network
Join Device to Network
4.5
Reference information
Figure 4-2. Rosemount 248 Wireless Terminal Diagram
Waiting for updated drawing.
Note
In order to communicate with a Field Communicator, the device must be powered by
connecting the Power Module.
Table 4-2. Rosemount WirelessHART 248 Fast Key Sequences
Function
Device Information
28
Key
sequence
2, 2, 5, 3
Menu items
Manufacturer, Model, Final Assembly Number, Universal, Field
Device, Software, Hardware, Descriptor, Message, Date, Model
Number I, Model Number II, Model Number III, SI Unit
Restriction, Country, Device ID
Guided Setup
2, 1
Join Device to Network, Configure Update Rate, Configure
Sensor, Calibrate Sensor
Manual Setup
2, 2
Wireless, Process Sensor, Percent of Range, Device
Temperatures, Device Information, Other
Wireless
Configuration
2, 2, 1
Network ID, Join Device to Network, Update Rate, Configure
Broadcast Power Level, Power Mode, Power Source
Sensor Calibration
3, 4, 1
Current Upper Trim, Current Lower Trim, Lower Sensor Trim,
Upper Sensor Trim, Recall Factory Trim, RTD 2 Wire Offset
Commissioning
Section 5: Operation and Maintenance
Reference Manual
July 2014
00809-0300-4248, Rev AA
Section 5
Operation and Maintenance
Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 29
Power module replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 30
5.1
Safety messages
Instructions and procedures in this section may require special precautions to ensure the safety
of the personnel performing the operations. Information that potentially raises safety issues is
indicated by a warning symbol ( ). Please refer to the following safety messages before
performing an operation preceded by this symbol.
5.1.1
Warnings
Failure to follow these installation guidelines could result in death or serious injury:

Make sure only qualified personnel perform the installation.
Explosions could result in death or serious injury:
Installation of this transmitter in an explosive environment must be in accordance with
the appropriate local, national, and international standards, codes, and practices.
Please review the approvals section of the 248 reference manual for any restrictions
associated with a safe installation.

Before connecting a Field Communicator in an explosive atmosphere, ensure the
instruments 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.
Process leaks may cause harm or result in death.

Do not remove the thermowells while in operation.

Install and tighten thermowells and sensors before applying pressure.
Electrical shock can result in death or serious injury.

Avoid contact with the leads and terminals. High voltage that may be present on leads
can cause electrical shock.
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following conditions:

This device may not cause harmful interference.
This device must accept any interference received, including interference that may
cause undesired operation.

This device must be installed to ensure a minimum antenna separation distance of 20
cm from all persons.
The Power Module may be replaced in a hazardous area. The Power Module has surface
resistivity greater than one gigaohm and must be properly installed in the wireless device
enclosure. Care must be taken during transportation to and from the point of installation to
prevent electrostatic charge build-up.


Operation and Maintenance
29
Section 5: Operation and Maintenance
5.2
Reference Manual
00809-0300-4248, Rev AA
July 2014
Power module replacement
Expected Power Module life is 10 years at reference conditions.(1)
When Power Module replacement is required, remove the cover and remove the Power Module.
Replace the Power Module (part number 701PGNKF) and replace the cover. Tighten to
specification and verify operation.
Handling considerations
The power module with the wireless unit contains one “D” size primary lithium-thionyl chloride
battery (Green Power Module, model number 701PGNKF). Each battery contains approximately
5.0 grams of lithium. Under normal conditions, the battery materials are self-contained and are
not reactive as long as the batteries and the pack integrity are maintained. Care should be taken
to prevent thermal, electrical or mechanical damage.
Contacts should be protected to prevent premature discharge.
Power Modules should be stored in a clean and dry area. For maximum Power Module life,
storage temperature should not exceed 30 °C.
Use caution when handling the power module, it may be damaged if dropped from heights in
excess of 20 feet.
Battery hazards remain when cells are discharged.
Environmental considerations
As with any battery, local environmental rules and regulations should be consulted for proper
management of spent batteries. If no specific requirements exist, recycling through a qualified
re-cycler is encouraged. Consult the materials safety data sheet for battery specific information.
Shipping considerations
The unit was shipped to you without the Power Module installed. Please remove the Power
Module prior to shipping the unit.
(1)
30
Reference conditions are 70° F (21° C), transmit rate of once per minute, and routing data for three additional network devices.
Operation and Maintenance
Reference Manual
Section 5: Operation and Maintenance
00809-0300-4248, Rev AA
July 2014
5.3
LCD screen messages
5.3.1
Startup screen sequence
The following screens will display when the Power Module is first connected to the Rosemount
248 Wireless.
XXXXX
XXXXxxx
All Segments On: used to visually determine if there are
any bad segments on the LCD
xxxxxx
2051
Device Identification: used to determine Device Type.
WIrels
Abcde
Device Information - Tag: user entered tag which is eight
characters long - will not display if all characters are blank
fgh
netwk
13 0 5
Software Revision: device software revision
ID
snsr
1 0. 0 2
PV Screen: process temperature, ohms, or mV value
depending on how the device is configured
deg c
Operation and Maintenance
31
Reference Manual
Section 5: Operation and Maintenance
00809-0300-4248, Rev AA
July 2014
TERM
2 5. 0 0
SV Screen: terminal temperature value
deg c
DEV
2 5. 2 5
TV Screen: device temperature value
deg c
Suply
3. 6 0
QV Screen: voltage reading at the power supply
terminals
volts
PRCNT
7. 2 1
Percent Range Screen: percent range reading
RANGE
alert
Alert Screen: at least one alert is present - this screen will
not display if no alerts are present
presnt
Note
Use the Rosemount Wireless LCD Part Number: 00753-9004-0002.
32
Operation and Maintenance
Section 6: Troubleshooting
Reference Manual
July 2014
00809-0300-4248, Rev AA
Section 6
Troubleshooting
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rosemount 248 Wireless device status information . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rosemount 248 Wireless troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wireless network troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.1
page 33
page 33
page 35
page 36
page 36
Overview
Table 6-2 provides summarized maintenance and troubleshooting suggestions for the most
common operating problems. If you suspect malfunction despite the absence of any diagnostic
messages on the Field Communicator display, follow the procedures described here to verify
that transmitter hardware and process connections are in good working order. Always deal with
the most likely checkpoints first.
6.2
Safety messages
Procedures and instructions 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 ( ). Refer to the following safety messages before performing
an operation preceded by this symbol.
Troubleshooting
33
Section 6: Troubleshooting
6.2.1
Reference Manual
00809-0300-4248, Rev AA
July 2014
Warnings
Failure to follow these installation guidelines could result in death or serious injury:
Make sure only qualified personnel perform the installation.
Explosions could result in death or serious injury:

Installation of this transmitter in an explosive environment must be in accordance
with the appropriate local, national, and international standards, codes, and practices.
Please review the approvals section of the 248 reference manual for any restrictions
associated with a safe installation.

Before connecting a Field Communicator in an explosive atmosphere, ensure the
instruments 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.
Process leaks may cause harm or result in death.

Do not remove the thermowells while in operation.
Install and tighten thermowells and sensors before applying pressure.
Electrical shock can result in death or serious injury.


Avoid contact with the leads and terminals. High voltage that may be present on leads
can cause electrical shock.
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following conditions:





34
This device may not cause harmful interference.
This device must accept any interference received, including interference that may
cause undesired operation.
This device must be installed to ensure a minimum antenna separation distance of 20
cm from all persons.
The Power Module may be replaced in a hazardous area. The Power Module has
surface resistivity greater than one gigaohm and must be properly installed in the
wireless device enclosure. Care must be taken during transportation to and from the
point of installation to prevent electrostatic charge build-up.
Troubleshooting
Reference Manual
Section 6: Troubleshooting
00809-0300-4248, Rev AA
July 2014
Table 6-1. Rosemount 248 Wireless device status information
Device status
Description
Recommended action
Electronics
Failure
An electronics error that could
impact the device measurement
reading has occurred.
1. Reset the device
2. Reconfirm all configuration items in the device
3. If the condition persists, replace the electronics
Terminal Block
Failure
A critical failure has occurred in
the transmitter's terminal block
1. Reset the device
2. Replace the terminal block
Sensor Failure
The device has detected an open,
short, or too much resistance for
this sensor.
1. Verify the sensor connection and wiring. Refer to the wiring
diagrams found on the terminal compartment to ensure proper
wiring.
2. Verify the integrity of the sensor and sensor lead wires. If the
sensor is faulty, repair or replace the sensor.
3. Reconfirm sensor configuration
4. Replace the sensor
5. If problem persists, replace the electronics
Radio Failure
The wireless radio has detected a
failure or stopped
communicating.
1. Reset the device
2. If the condition persists, replace the electronics
Supply Voltage
Failure
The supply voltage is too low for
the device to broadcast updates.
1. Replace the Power Module
Electronics
Warning
The device has detected an
electronics error that does not
currently impact the device
measurement reading.
1. Reset the device
2. Reconfirm all configuration items in the device
3. If the condition persists, replace the electronics
The sensor has exceeded the
maximum measurement range.
1. Check process for possible saturation condition
2. Verify that the appropriate sensor was chosen for the application
3. Reconfirm sensor configuration
4. Reset the device
5. Replace the sensor
The electronics temperature has
exceeded the transmitter's
maximum range.
1. Verify environmental temperature is within the transmitter’s
range
2. Remote mount the transmitter away from process and
environmental conditions
3. Reset the device
4. If the condition persists, replace the electronics
Terminal
Temperature
has Exceeded
Limits
The terminal temperature has
exceed the transmitter's
maximum range
1. Verify environmental temperature is within the transmitter’s
range
3. Remote mount the transmitter away from process and
environmental conditions
4. Reset the device
5. If the condition persists, replace the electronics
Supply Voltage
Low
The supply voltage is low and may
soon affect broadcast updates
1. Replace the Power Module
Database
Memory
Warning
The device has failed to write to
the database memory. Any data
written during this time may have
been lost.
1. Reset the device
2. Reconfirm all configuration items in the device
3. If logging dynamic data not needed, this advisory can be safely
ignored
4. If the condition persists, replace the electronics
Invalid
Configuration
The device has detected a
configuration error based on a
change to the device.
1. Click on details for more information
2. Correct the parameter that has a configuration error
3. Reset the device
4. If the condition persists, replace the electronics
Sensor has
Exceeded
Limits
Electronics
Temperatures
has Exceeded
Limits
Troubleshooting
35
Reference Manual
Section 6: Troubleshooting
00809-0300-4248, Rev AA
July 2014
Table 6-1. Rosemount 248 Wireless device status information
Device status
Description
The device is in simulation mode
and may not be reporting actual
information.
Simulation
Active
Recommended action
1. Verify that simulation is no longer required
2. Disable Simulation mode in Service Tools
3. Reset the device
Table 6-2. Rosemount 248 Wireless troubleshooting
Symptom
Potential source
High Output
Temperature
Detected
Digital
Temperature
Output is
Erratic
Recommended action
Sensor Input Failure or
Connection
Connect a Field Communicator and enter the transmitter test mode
to isolate a sensor failure.
Check for a sensor open or short circuit.
Check the process variable to see if it is out of range.
Electronics Module
Connect a Field Communicator and enter the transmitter status
mode to isolate module failure.
Connect a 375 Field Communicator and check the sensor limits to
ensure calibration adjustments are within the sensor range.
Wiring
Check sensor wiring integrity at all junctions to insure proper
connections.
Electronics Module
Connect a Field Communicator and enter the transmitter test mode
to isolate module failure.
Sensor Element
Connect a Field Communicator and enter the Transmitter test mode
to isolate a sensor failure.
Check the process variable to see if it is out of range.
Electronics Module
Connect a Field Communicator and check the sensor limits to
ensure calibration adjustments are within the sensor range.
Connect a Field Communicator and enter the Transmitter test mode
to isolate an electronics module failure.
Low Output or
No Output
Table 6-3. Wireless network troubleshooting
Symptom
Device not joining
the network
Recommended action
Verify network ID and join key
Verify network is in active network advertise
Wait longer (30 min.)
Check Power Module
Verify device is within range of at least one other device
Power Cycle device to try again
Verify device is configured to join. Ensure the Join Mode is configured to “Join on Powerup or Reset”
See troubleshooting section of Smart Wireless Gateway for more information
Short battery life
Check that “Power Always On” mode is off
Verify device is not installed in extreme temperatures
Verify that device is not a network pinch point
Check for excessive network rejoins due to poor connectivity
Limited Bandwidth
Error
Reduce the Update Rate on transmitter
Increase communication paths by adding more wireless points
Check that device has been on line for at least an hour
Check that device is not routing through a “limited” routing node
Create a new network with an additional Smart Wireless Gateway
36
Troubleshooting
Appendix A: Specifications and Reference data
Reference Manual
July 2014
00809-0300-4248, Rev AA
Appendix A
Specifications and Reference
Data
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 37
Dimensional drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 44
Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 45
A.1
Specifications
A.1.1
Functional specifications
Input
Supports Thermocouple, RTD, millivolt and ohm input types. See “Accuracy” on page 40 for
sensor options.
Output
IEC 62591 (WirelessHART), 2.4 GHz DSSS.
Wireless radio (Internal antenna, WP option)
Frequency: 2.4 - 2.4835 GHz
Channels: 15
Modulation: IEEE 802.15.4 compliant DSSS
Local display
The optional 3-line, 7-digit LCD can display user-selectable information such as primary variable
in engineering units, percent of range, and electronics temperature. The display updates based
on the wireless update rate.
Humidity limits
0–99% relative humidity
Update rate
WirelessHART, User selectable, 1 sec. to 60 min.
Accuracy
(PT 100 @ reference conditions: 20 °C)
±0.45 °C (±0.81 °F)
Specifications and Reference Data
37
Appendix A: Specifications and Reference data
A.1.2
Reference Manual
00809-0300-4248, Rev AA
July 2014
Physical specifications
Electrical connections
Power Module
Field replaceable, keyed connection eliminates the risk of incorrect installation. Intrinsically Safe
Lithium-Thionyl chloride Power Module (Green Power Module, model number 701PGNKF) with
PBT/PC enclosure. Ten-year life at one minute update rate.(1)
Reference conditions are 70 °F (21 °C), and routing data for three additional network devices.
Note
Continuous exposure to ambient temperature limits of -40 °F or 185 °F (-40 °C or 85 °C) may
reduce specified life by less than 20 percent.
Sensor terminals
Sensor terminals permanently fixed to terminal block.
Field Communicator connections
Communication terminals
HART interface connections fixed to the Power Module.
Materials of construction
Enclosure
Housing
PBT/PC with NEMA 4X and IP66/67
Cover O-ring
Silicone
Terminal Block and Power Module
PBT
Mounting
Transmitters may be attached directly to the sensor. Mounting brackets also permit remote
mounting. See “Dimensional drawings” on page 44.
Weight
248 without LCD - 1.31 lb. (0.60 kg)
248 with M5 LCD - 1.43 lb. (0.65 kg)
(1)
38
Reference conditions are 70° F (21° C), transmit rate of once per minute, and routing data for three additional network devices.
Specifications and Reference Data
Reference Manual
Appendix A: Specifications and Reference data
00809-0300-4248, Rev AA
July 2014
Enclosure ratings (Rosemount 248 Wireless)
NEMA 4X and IP66/67
A.1.3
Performance specifications
Conformance to specification (±3(Sigma))
Technology leadership, advanced manufacturing techniques, and statistical process control
ensure specification conformance to at least ±3.
EMC (ElectroMagnetic Compatibility)
The 248 Wireless meets all requirements listed under IEC 61326.
Transmitter measurement stability
The 248 Wireless has a stability of ±0.15% of output reading or 0.15 °C (whichever is greater) for
12 months
Self calibration
The analog-to-digital measurement circuitry automatically self-calibrates for each temperature
update by comparing the dynamic measurement to extremely stable and accurate internal
reference elements.
Vibration effect
No effect when tested per the requirements of IEC60770-1: High Vibration Level - field or
pipeline (10-60 Hz 0.21mm displacement peak amplitude / 60-2000 Hz 3g).
Specifications and Reference Data
39
Reference Manual
Appendix A: Specifications and Reference data
00809-0300-4248, Rev AA
July 2014
A.1.4
Accuracy
Table A-1. 248x Wireless accuracy
Sensor options
Sensor reference
2-, 3-, 4-wire RTDs
Digital accuracy(1)
Input ranges
°C
°F
°C
°F
Pt 100 ( = 0.00385)
IEC 751
–200 to 850
–328 to 1562
± 0.45
± 0.81
Pt 200 ( = 0.00385)
IEC 751
–200 to 850
–328 to 1562
± 0.45
± 0.81
Pt 500 ( = 0.00385)
IEC 751
–200 to 850
–328 to 1562
± 0.57
± 1.026
Pt 1000 ( = 0.00385)
IEC 751
–200 to 300
–328 to 572
± 0.57
± 1.026
Pt 100 ( = 0.003916)
JIS 1604
–200 to 645
–328 to 1193
± 0.45
± 0.81
Pt 200 ( = 0.003916)
JIS 1604
–200 to 645
–328 to 1193
± 0.81
± 1.458
Ni 120
Edison Curve No. 7
–70 to 300
–94 to 572
± 0.45
± 0.81
Cu 10
Edison Copper Winding No. 15
–50 to 250
–58 to 482
± 4.16
± 7.488
Pt 50 ( = 0.00391)
GOST 6651-94
–200 to 550
–328 to 990
± 0.9
± 1.62
Pt 100 ( = 0.00391)
GOST 6651-94
–200 to 550
–328 to 990
± 0.45
± 0.81
Cu 50 ( =0.00426)
GOST 6651-94
–50 to 200
-58 to 392
± 1.44
± 2.592
Cu 50 ( = 0.00428)
GOST 6651-94
–185 to 200
-301 to 392
± 1.44
± 2.592
Cu 100 ( = 0.00426)
GOST 6651-94
–50 to 200
-58 to 392
± 0.72
± 1.296
Cu 100 ( = 0.00428)
GOST 6651-94
–185 to 200
–301 to 392
± 0.72
± 1.296
Type B(3)
NIST Monograph 175, IEC 584
100 to 1820
212 to 3308
± 2.25
± 4.05
Type E
NIST Monograph 175, IEC 584
–50 to 1000
–58 to 1832
± 0.60
± 1.08
NIST Monograph 175, IEC 584
–180 to 760
–292 to 1400
± 1.05
± 1.89
Type K
NIST Monograph 175, IEC 584
–180 to 1372
–292 to 2501
± 1.46
± 2.628
Type N
NIST Monograph 175, IEC 584
–200 to 1300
–328 to 2372
± 1.46
± 2.628
Type R
NIST Monograph 175, IEC 584
0 to 1768
32 to 3214
± 2.25
± 4.05
Type S
NIST Monograph 175, IEC 584
0 to 1768
32 to 3214
± 2.1
± 3.78
Type T
NIST Monograph 175, IEC 584
–200 to 400
–328 to 752
± 1.05
± 1.89
DIN Type L
DIN 43710
–200 to 900
–328 to 1652
± 1.05
± 1.89
DIN Type U
DIN 43710
–200 to 600
–328 to 1112
± 1.05
± 1.89
Type W5Re/W26Re
ASTM E 988-96
0 to 2000
–32 to 3632
± 2.1
± 3.78
GOST Type L
GOST R 8.585-2001
–200 to 800
–328 to 1472
± 1.80
± 3.24
Thermocouples(2)
Type J
(4)
Other Sensor types
Millivolt Input
–10 to 100 mV
± 0.045 mV
2-, 3-, 4-wire Ohm Input
0 to 2000 ohms
± 1.35 ohm
(1)
(2)
(3)
(4)
40
The published digital accuracy applies over the entire sensor input range. Digital output can be accessed by HART Communications or wireless protocol.
Total digital accuracy for thermocouple measurement: sum of digital accuracy +0.8 °C. (cold junction accuracy).
Digital accuracy for NIST Type B T/C is ±9.0 °C (±16.2 °F) from 100 to 300 °C (212 to 572 °F).
Digital accuracy for NIST Type K T/C is ±2.1 °C (±3.79 °F) from –180 to –90 °C (–292 to –130 °F).
Specifications and Reference Data
Reference Manual
Appendix A: Specifications and Reference data
00809-0300-4248, Rev AA
A.1.5
July 2014
Ambient temperature effect
Table A-2. 248x Wireless Ambient temperature effects
Sensor
options
Sensor
reference
2-, 3-, 4-wire RTDs
Input
range
Temperature effects per 1.0 °C (1.8 °F)
change in Ambient Temperature
°C
°F
Digital
accuracy
Pt 100
( = 0.00385)
IEC 751
–200 to 850
0.009 °C (0.0162 °F)
Entire Sensor Input
Range
Pt 200
( = 0.00385)
IEC 751
–200 to 850
0.012 °C (0.0216 °F)
Entire Sensor Input
Range
Pt 500
( = 0.00385)
IEC 751
–200 to 850
0.009 °C (0.0162 °F)
Entire Sensor Input
Range
Pt 1000
( = 0.00385)
IEC 751
–200 to 300
0.009 °C (0.0162 °F)
Entire Sensor Input
Range
Pt 100
( = 0.003916)
JIS 1604
–200 to 645
0.009 °C (0.0162 °F)
Entire Sensor Input
Range
Pt 200
( = 0.003916)
JIS 1604
–200 to 645
0.012 °C (0.0216 °F)
Entire Sensor Input
Range
Ni 120
Edison Curve
No. 7
–70 to 300
0.009 °C (0.0162 °F)
Entire Sensor Input
Range
Cu 10
Edison Copper
Winding No. 15
–50 to 250
0.06 °C (0.162 °F)
Entire Sensor Input
Range
Pt 50
( = 0.00391)
GOST 6651-94
–200 to 550
0.018 °C (0.0324 °F)
Entire Sensor Input
Range
Pt 100
( = 0.00391)
GOST 6651-94
–200 to 550
0.009 °C (0.0162 °F)
Entire Sensor Input
Range
Cu 50
( = 0.00426)
GOST 6651-94
–50 to 200
0.012 °C (0.0216 °F)
Entire Sensor Input
Range
Cu 50
( = 0.00428)
GOST 6651-94
–185 to 200
0.012 °C (0.0216 °F)
Entire Sensor Input
Range
Cu 100
( = 0.00426)
GOST 6651-94
–50 to 200
0.009 °C (0.0162 °F)
Entire Sensor Input
Range
Cu 100
( = 0.00428)
GOST 6651-94
–185 to 200
0.009 °C (0.0162 °F)
Entire Sensor Input
Range
0.0435 °C
T 1000 °C
0.096 °C - (0.0075% of (T - 300))
300 °C  T < 1000 °C
0.162 °C - (0.033% of (T - 100))
100 °C  T < 300 °C
0.015 °C + (0.00129% of absolute value T)
All
0.0162 °C + (0.00087% of T)
T 0 °C
0.0162 °C + (0.0075% of absolute value T)
T < 0 °C
0.0183 °C + (0.0027% of T)
T 0 °C
0.0183 °C + (0.0075% of absolute value T)
T < 0 °C
Thermocouples
Type B
NIST Monograph
175, IEC 584
100 to 1820
Type E
NIST Monograph
175, IEC 584
–50 to 1000
Type J
NIST Monograph
175, IEC 584
–180 to 760
Type K
NIST Monograph
175, IEC 584
–180 to 1372
Specifications and Reference Data
41
Reference Manual
Appendix A: Specifications and Reference data
00809-0300-4248, Rev AA
July 2014
Table A-2. 248x Wireless Ambient temperature effects
Sensor
options
Sensor
reference
Input
range
Temperature effects per 1.0 °C (1.8 °F)
change in Ambient Temperature
Digital
accuracy
Type N
NIST Monograph
175, IEC 584
–200 to 1300
0.0204 °C + (0.00108% of absolute value T)
All
Type R
NIST Monograph
175, IEC 584
0 to 1768
0.048 °C
T 200 °C
0.069 °C - (0.0108% of T)
T < 200 °C
Type S
NIST Monograph
175, IEC 584
0 to 1768
0.048 °C
T 200 °C
0.069 °C - (0.0108% of T)
T < 200 °C
Type T
NIST Monograph
175, IEC 584
–200 to 400
0.0192 °C
T 0 °C
0.0192 °C + (0.0129% of absolute value T)
T < 0 °C
DIN Type L
DIN 43710
–200 to 900
0.0162 °C + (0.00087% of T)
T 0 °C
0.0162 °C + (0.0075% of absolute value T)
T < 0 °C
DIN Type U
DIN 43710
–200 to 600
0.0192 °C
T 0 °C
0.0192 °C + (0.0129% of absolute value T)
T < 0 °C
Type
W5Re/W26Re
ASTM E 988-96
0.048 °C
T 200 °C
0.069 °C - (0.0108% of T)
T < 200 °C
GOST Type L
GOST R
8.585-2001
0.021 °C
T 0 °C
0.0105 °C + (0.0045% of absolute value T)
T < 0 °C
–10 to 100 mV
0.0015 mV
Entire Sensor Input
Range
0 to 2000 
0.0252 W
Entire Sensor Input
Range
0 to 2000
–200 to 800
Other Sensor Types
Millivolt Input
2-, 3-, 4-wire Ohm
Transmitters can be installed in locations where the ambient temperature is between –40 and
85 °C (–40 and 185 °F). In order to maintain excellent accuracy performance, each transmitter is
individually characterized over this ambient temperature range at the factory.
Temperature effects example
When using a Pt 100 ( = 0.00385) sensor input at 30 °C ambient temperature:
42

Digital Temperature Effects: 0.009 °C x (30 - 20) = 0.09 °C

Worst Case Error: Digital + Digital Temperature Effects = 0.45 °C + 0.09 °C = 0.54 °C

Total Probable Error:
0.45 + 0.09 = 0.459
°C
Specifications and Reference Data
Reference Manual
Appendix A: Specifications and Reference data
00809-0300-4248, Rev AA
A.1.6
July 2014
Lead wire resistance effect
Sensor lead wire resistance effect—RTD input
Examples of approximate lead wire resistance effect calculations
Pt 100 385 RTD
Given:
Total cable length:
150 m
Imbalance of the lead wires at 20 °C:
0.5 
0.025 /m
Resistance/length (18 AWG Cu):
Temperature coefficient of Cu (Cu):
0.039 / °C
Temperature coefficient of Pt (Pt):
0.00385 / °C
Change in Ambient Temperature (Tamb):
25 °C
100  (for Pt 100 RTD)
RTD Resistance at 0 °C (R0):

Pt100 4-wire RTD: Negligible (independent of lead wire resistance up to 5 per lead)

Pt100 3-wire RTD:
of Lead Wires
Basic Error = Imbalance
(Pt x R0)
Error due to amb. temperature variation =
(Cu) x (Tamb) x (Imbalance of Lead Wires)
(Pt x R0)
Lead wire imbalance seen by the transmitter = 0.5 
0.5 
Basic Error = (0.00385/ C) x (100 ) = 1.3 °C
Error due to amb. temp. var. of ±25 °C =

(0.0039 /  C) x (25 C) x (0.5 )
(0.00385 / C) x (100 )
= ±0.1266 C
Pt100 2-wire RTD:
Basic Error =
Imbalance of Lead Wires
(Pt x R0)
Error due to amb. temperature variation =
(Cu) x (Tamb) x (Lead Wire Resistance)
(Pt x R0)
Lead wire resistance seen by the transmitter = 150 m x 2 wires x 0.025 /m = 7.5 
Basic Error =

7.5 
(0.00385/ C) x (100 )
Error due to amb. temp. var. of ±25 °C =
Specifications and Reference Data
= 19.5 °C
(0.0039 /  C) x (25 C) x (7.5 )
(0.00385 / C) x (100 )
= ± 1.9 °C
43
Appendix A: Specifications and Reference data
A.2
Reference Manual
00809-0300-4248, Rev AA
July 2014
Dimensional drawings
Rosemount 248 Wireless Remote Mount
Remote mounted temperature sensor specified separately.
Rosemount 248 Wireless Direct Mount
Direct mounted temperature sensor specified separately (see ordering option code XA).
44
Specifications and Reference Data
Reference Manual
Appendix A: Specifications and Reference data
00809-0300-4248, Rev AA
A.3
July 2014
Ordering information
Table A-3. Rosemount 248 Wireless Temperature Transmitter
★ The Standard offering represents the most common options. The starred options (★) should be selected for best delivery.
__The Expanded offering is subject to additional delivery lead time.
Code
248
Product description
Temperature Transmitter
Transmitter type
★
Wireless Field Mount
Transmitter output
★
Wireless
Product certifications
NA
No Approval
★
I5
FM Intrinsically Safe
★
N5
FM Non-incendive and Dust Ignition-proof
★
I6
CSA Intrinsically Safe
★
I1
ATEX Intrinsically Safety
★
I7
IECEx Intrinsic Safety
★
I2
INMETRO Intrinsic Safety
★
I4
TIIS Intrinsic Safety
★
I3
China Intrinsic Safety
★
IM
GOST Intrinsic Safety
★
Enclosure options
Wireless Engineered Polymer Housing
Material
IP rating
Engineered Polymer
IP66/67
★
Conduit entry size
/2-14 NPT
★
Options (Include with selected model number)
Assemble to options
NS
No Sensor
★
XA
Sensor Specified Separately and Assembled to Transmitter
★
XC
Hand Tight Assembly of a Transmitter and Sensor
★
Wireless update rate, Operating frequency and Protocol
WA3
User Configurable Update Rate, 2.4GHz DSSS, WirelessHART®
★
Omni directional Wireless Antenna and SmartPower™
WP5
Internal Antenna, Compatible with Green Power Module (I.S. Power Module sold separately)
Specifications and Reference Data
★
45
Reference Manual
Appendix A: Specifications and Reference data
00809-0300-4248, Rev AA
July 2014
Table A-3. Rosemount 248 Wireless Temperature Transmitter
★ The Standard offering represents the most common options. The starred options (★) should be selected for best delivery.
__The Expanded offering is subject to additional delivery lead time.
Mounting Bracket
B5
Universal “L” Mounting Bracket for 2-in. pipe mounting - SST bracket and bolts
★
LCD Display
★
Display
M5
Cable Gland option
G2
Cable Gland (7.5 mm - 11.9 mm)
★
G4
Thin Wire Cable Gland (3 mm - 8 mm)
★
5-Point calibration
C4
5-Point Calibration (Requires the Q4 option code to generate a Calibration Certificate)
★
Calibration certificate
C4
★
Calibration Certificate (3-Point Calibration)
Line filter
F5
50 Hz Line Voltage Filter
★
F6
60 Hz Line Voltage Filter
★
Software configuration
C1
Custom Configuration of Date, Descriptor, Message and Wireless Parameters (Requires CDS with order)
★
Extended product warranty
WR3
3-year warranty
WR5
5-year warranty
Typical Model Number: 248 D X NA D 2 WA3 WK1 B4 F6 NS
46
Specifications and Reference Data
Appendix B: Product Certifications
Reference Manual
July 2014
00809-0300-4248, Rev AA
Appendix B
B.1
Product Certifications
Approved Manufacturing Locations
Rosemount Inc. - Chanhassen, Minnesota, USA
Rosemount Temperature GmbH - Germany
Emerson Process Management Asia Pacific - Singapore
B.2
European Directive Information
(Pending)
B.3
Ordinary Location Certification from FM
Approvals
North America
(Pending)
Europe
(Pending)
International
(Pending)
Product Certifications
47
Appendix B: Product Certifications
Reference Manual
July 2014
00809-0300-4248, Rev AA
48
Product Certifications
Appendix C: Mapping for non-DD based Integration with Host Systems
Reference Manual
July 2014
00809-0300-4248, Rev AA
Appendix C
Mapping for non-DD based
Integration with Host Systems
Mapping of alert messages in the HART command 48 additional status . . . . . . . . . . . . page 49
Mapping of device variables index numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 50
C.1
Mapping of alert messages in the HART command
48 additional status
This outlines the most important alerts in the HART command 48 Additional Status Field for 248
Wireless transmitter. The information in this section can be used by DeltaV™ for alert
monitoring, and in the Rosemount 1420 Smart Wireless Gateway for Additional Status mapping
in Modbus, OPC, etc.
A complete list of Additional Status bits is available in the Rosemount 1420 Smart Wireless
Gateway.
Table C-1 to Table C-3 shows a list of the most important alert messages that may be displayed
in the AMS Wireless Configurator and Field Communication together with the location of the
Alert in the HART command 48 Additional Status field. For recommendation actions refer to
Table 6-1. on page 35.
To view Active Alerts, from the Home screen, go to Service Tools > Active Alerts.
Table C-1. Failure Alerts (F:)
Message
Additional status(1)
Description
Electronics Failure
Byte 8 :: Bit 6
An electronics error that could impact the device
measurement reading has occurred
Terminal Block Failure
Byte 3 :: Bit 3
A critical failure has occurred in the transmitter's
terminal block
Sensor Failure
Byte 3 :: Bit 7
The device has detected an open, short, or too
much resistance for this sensor
Radio Failure
Byte 1 :: Bit 1
Byte 1 :: Bit 7
The wireless radio has detected a failure or stopped
communicating
Supply Voltage Failure
Byte 6 :: Bit 3
The supply voltage is too low for the device to
broadcast
(1) Location of the Alert in the HART command 48 Status field.
Table C-2. Maintenance Alerts (M:)
Message
Additional status(1)
Description
Sensor has Exceeded Limits
Byte 3 :: Bit 5
The sensor has exceeded the maximum
measurement range
Terminal Temperature has
Exceeded Limits
Byte 3 :: Bit 1
The terminal temperature has exceeded the
transmitter's maximum range
Mapping for non-DD based Integration with Host Systems
49
Appendix C: Mapping for non-DD based Integration with Host Systems
Reference Manual
00809-0300-4248, Rev AA
July 2014
Table C-2. Maintenance Alerts (M:)
Additional status(1)
Message
Description
Supply Voltage Low
Byte 1 :: Bit 6
The supply voltage is low and may soon
affect broadcast updates
Electronics Temperature has
Exceeded Limits
Byte 1 :: Bit 3
The electronics temperature has exceeded
the transmitter's maximum range
(1) Location of the Alert in the HART command 48 Status field.
Table C-3. Advisory alerts (A:)
Message
Additional status(1)
Description
Database Memory Warning
Byte 0 :: Bit 2
The device has failed to write to the
database memory / Any data written during
this time may have been lost
Invalid Configuration
Byte 2 :: Bit 6
The device has detected a configuration
error based on a change to the device
Button Stuck
Byte :: Bit
A button on the Electronics Board is
detected as stuck in the active position
Simulation Active
Byte 8 :: Bit 0
The device is in simulation mode and may
not be reporting actual information
(1) Location of the Alert in the HART command 48 Status field.
C.2
Mapping of device variables index numbers
To integrate a device into the host system, it may be necessary to know what each device
variable represents, and what index number it has been assigned to. The variable index number
is an arbitrary number that is used to uniquely identify each variable that is supported in the field
device.
Table C-4 to Table C-5 displays the device variable and variable mapping indexes for the 648
Wireless transmitter.
Table C-4. Device variable index
Device variable index
Description
Supply Voltage
Electronics Temperature
Process Temperature
Terminal Temperature (for CJC)
244
Percent of Range
Table C-5. Variable mapping
Process variables
50
Mapped variable index
PV
2 - Process Temperature
SV
3 - Terminal Temperature
TV
1 - Electronics Temperature
QV
0 - Supply Voltage
Mapping for non-DD based Integration with Host Systems
Reference Manual
00809-0300-4248, Rev AA
July 2014
Standard Terms and Conditions of Sale can be found at www.rosemount.com/terms_of_sale
The Emerson logo is a trademark and service mark of Emerson Electric Co.
Rosemount. the Rosemount logotype, and SMART FAMILY are registered trademarks of Rosemount Inc.
Coplanar is a trademark of Rosemount Inc.
Halocarbon is a trademark of the Halocarbon Products Corporation.
Fluorinert is a registered trademark of Minnesota Mining and Manufacturing Company Corporation.
Syltherm 800 and D.C. 200 are registered trademarks of Dow Corning Corporation.
Neobee M-20 is a registered trademark of PVO International, Inc.
HART is a registered trademark of the HART Communication FOUNDATION.
FOUNDATION fieldbus is a registered trademark of the Fieldbus FOUNDATION.
All other marks are the property of their respective owners.
© July 2014 Rosemount, Inc. All rights reserved.
Emerson Process Management
Rosemount Measurement
8200 Market Boulevard
Chanhassen MN 55317 USA
Tel (USA) 1 800 999 9307
Tel (International) +1 952 906 8888
Fax +1 952 906 8889
Emerson Process Management
Latin America
1300 Concord Terrace, Suite 400
Sunrise Florida 33323 USA
Tel + 1 954 846 5030
00809-0300-4248, Rev AA, 07/14
Emerson Process Management
GmbH & Co.
Argelsrieder Feld 3
82234 Wessling
Germany
Tel 49 (8153) 9390
Fax 49 (8153) 939172
Emerson Process Management Asia
Pacific Private Limited
1 Pandan Crescent
Singapore 128461
T (65) 6777 8211
F (65) 6777 0947
Enquiries@AP.EmersonProcess.com
Beijing Rosemount Far East
Instrument Co., Limited
No. 6 North Street,
Hepingli, Dong Cheng District
Beijing 100013, China
T (86) (10) 6428 2233
F (86) (10) 6422 8586

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