Rosemount 848T User manual

www.rosemount.com
Reference Manual
00809-0100-4848, Rev AA
July 2009
Rosemount 848T Wireless Temperature
Transmitter

Reference Manual
00809-0100-4848, Rev AA
July 2009 Rosemount 848T Wireless
www.rosemount.com
Rosemount 848T Wireless
Temperature Transmitter
Rosemount 848T Wireless Temperature Transmitter may be protected by one or more U.S.
Patents issued or pending. Other foreign patents issued or pending.
Rosemount 848T Wireless Hardware Revision
HART®Device Revision
Field Communicator Field Device Revision
2
2
Dev v2, 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.
The United States has two toll-free assistance numbers and two international numbers.
Customer Central
United States: 1 800 999 9307
Asia Pacific: 65 77 8211
Europe/Middle East/Africa: 49 8153 9390
National Response Center
1 800 654 7768 (24 hours a day)
Equipment service needs
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.

Reference Manual
00809-0100-4848, Rev AA
July 2009
Rosemount 848T Wireless
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 848T Wireless 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. 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 (7.9 in.)
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.
Process leaks may cause harm or result in death.
• Install and tighten process connectors 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.
NOTICE
The Rosemount 848T 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.
NOTICE
Shipping considerations for wireless products (Lithium Batteries):
The unit was shipped to you without the power module installed. Please remove the power
module from the unit prior to shipping.
Each power module contains two “C” sized primary lithium batteries. 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.

Reference Manual
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July 2009
TOC-1
Rosemount 848T Wireless
Table of Contents
SECTION 1
Overview Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Mechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Environmental . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Return of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Product Recycling/Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
SECTION 2
Configuration Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Bench Top Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Connection Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Device Network Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Join Device to Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Configure Update Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Sensor Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Configure Sensor Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Configure Engineering Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Removing the Power Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Advanced Configuration (Optional). . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Configure Process Alerts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Device Temperature Engineering Units. . . . . . . . . . . . . . . . . . . . . 2-6
Write Protect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
AC Power FIlter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
HART Tag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
HART® Menu Tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Fast Key Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
SECTION 3
Installation Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Wireless Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Sensor Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Physical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
Remote Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
4–20 Milliamp Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
Grounding Practices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

Reference Manual
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July 2009
Rosemount 848T Wireless
TOC-2
SECTION 4
Commissioning Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Insert Power Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Network Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Verify Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
AMS Wireless Configurator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
SECTION 5
Operation and
Maintenance
Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Sensor Trim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Recall Factory Trim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Power Module Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
SECTION 6
Troubleshooting Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
APPENDIX A
Specifications and
Reference Data
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Functional Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Performance Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2
Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3
Ambient Temperature Effect. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4
Dimensional Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-6
APPENDIX B
Product Certifications Approved Manufacturing Locations . . . . . . . . . . . . . . . . . . . . . . . . B-1
Telecommunication Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
FCC and IC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
European Union Directive Information . . . . . . . . . . . . . . . . . . . . . . B-2
Ordinary Location Certification for FM . . . . . . . . . . . . . . . . . . . . . . B-2
Hazardous Locations Certificates. . . . . . . . . . . . . . . . . . . . . . . . . . B-2

Reference Manual
00809-0100-4848, Rev AA
July 2009 Rosemount 848T Wireless
www.rosemount.com
Section 1 Overview
Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page 1-1
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-2
Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page 1-3
Return of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page 1-4
Product Recycling/Disposal . . . . . . . . . . . . . . . . . . . . . . .page 1-5
SAFETY MESSAGES Instructions and procedures in this section may require special precautions to
ensure the safety of the personnel performing the operations. Information that
potentially raises safety issues is indicated by a warning symbol ( ). Please
refer to the following safety messages before performing an operation
preceded by this symbol.
Warnings
The power module with the wireless unit contains two “C” size cells. Each of
the primary lithium/thionyl chloride battery contains approximately 2.5 grams
of lithium, for a total of 5 grams in each power module. Under normal
conditions, the battery materials are self-contained and are not reactive as
long as the batteries and the module 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 life,
storage temperature should not exceed 30° C.
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 375 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.
• Use extreme caution when making contact with the leads and terminals.

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July 2009
Rosemount 848T Wireless
1-2
OVERVIEW
Manual This manual is designed to assist in the installation, operation, and
maintenance of Rosemount 848T Wireless.
Section 1: Overview
• Manual and Transmitter Overview
• Considerations
• Return of Materials
• Product Recycling/Disposal
Section 2: Configuration
• Introduction
• Bench Top Configuration
• Default Settings
• Device Network Configuration
• Sensor Configuration
• Advanced Configuration
Section 3: Mounting
• Wireless Considerations
• Sensor Connections
• Physical Installation
• 4-20 Milliamp Inputs
Section 4: Commissioning
• Insert Power Module
• Network Status
• Verify Operation
Section 5: Operation and Maintenance
• Calibration
• Power Module Replacement
Section 6: Troubleshooting
• General Information
Appendix A: Specifications and Reference Data
• Specifications
• Dimensional drawings
• Ordering Information
Appendix B: Approvals
• Product Certifications
• Installation Drawings

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July 2009
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Rosemount 848T Wireless
Transmitter Features of the Rosemount 848T Wireless include:
• Accepts four independently configurable RTD, thermocouple, ohm,
millivolts, and 4–20 mA inputs
• 8 user configurable alerts for PV, SV, TV, and QV
• Efficiently utilizes wireless network by sending four sensor readings in
one transmitted message
• Provides installation and operational savings for high density
applications
Refer to the following literature for a full range of compatible connection
heads, sensors, and thermowells provided by Emerson Process
Management.
• 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)
CONSIDERATIONS
General Electrical temperature sensors such as RTDs and thermocouples produce
low-level signals proportional to their sensed temperature. With simple
HART® configuration, the Rosemount 848T Wireless converts the low-level
sensor signal to a wireless-enabled signal.
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.
Mechanical Location
When choosing an installation location and position, take into account the
need for access to the transmitter. For best performance, the antenna should
be vertical with the conduit entries facing downward. The antenna should
have space between objects in a parallel metal plane, such as pipes or metal
framework, as they may adversely affect the performance of the antenna.
Place the antenna 18 – 36 in. (0.46 – 0.91 m) from any solid metal surface,
building, or structure.
NOTE:
The antenna can only rotate backwards.

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July 2009
Rosemount 848T Wireless
1-4
Electrical Power Module
The Rosemount 848T Wireless Temperature Transmitter is self-powered. The
power module with the wireless unit contains 2 “C” size primary lithium/thionyl
chloride batteries. Each battery contains approximately 2.5 grams of lithium,
for a total of 5 grams in each power module. Under normal conditions, the
battery materials are self-contained and are not reactive as long as the
batteries 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.
Sensor
Make sensor connections through the conduit entries on the bottom of the
enclosure. Be sure to provide adequate clearance for cover removal.
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).
NOTE
Consider moving the transmitter to thermally isolate it, if the ambient
temperature is outside the specification limit.
RETURN OF MATERIALS To expedite the return process in North America, call the Emerson Process
Management National Response Center toll-free at 800 654 7768. 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
For other locations outside North America, please contact an Emerson
Process Management sales representative for further instructions.
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.

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Rosemount 848T Wireless
SHIPPING CONSIDERATIONS FOR WIRELESS PRODUCTS (LITHIUM
BATTERIES):
The unit was shipped to you without the power module installed. Please
remove the power module prior to shipping the unit.
Primary lithium batteries (charged or discharged) 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.
PRODUCT
RECYCLING/DISPOSAL Recycling of equipment and packaging should be taken into consideration
and disposed of in accordance with local and national legislation/regulations.

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July 2009
Rosemount 848T Wireless
1-6

Reference Manual
00809-0100-4848, Rev AA
July 2009 Rosemount 848T Wireless
www.rosemount.com
Section 2 Configuration
Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page 2-1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page 2-2
Bench Top Configuration . . . . . . . . . . . . . . . . . . . . . . . . . .page 2-2
Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page 2-3
Device Network Configuration . . . . . . . . . . . . . . . . . . . . .page 2-3
Sensor Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page 2-4
Advanced Configuration (Optional) . . . . . . . . . . . . . . . . .page 2-5
HART® Menu Tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page 2-7
SAFETY MESSAGES Instructions and procedures in this section may require special precautions to
ensure the safety of the personnel performing the operations. Information that
potentially raises safety issues is indicated by a warning symbol ( ). Please
refer to the following safety messages before performing an operation
preceded by this symbol.
Warnings
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 375 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.
• Use extreme caution when making contact with the leads and terminals.
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.
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.

Reference Manual
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July 2009
Rosemount 848T Wireless
2-2
INTRODUCTION This section contains information on configuration and verification that should
be performed prior to installation.
Field Communicator and AMS instructions are included for performing
configuration functions. Additionally, Field Communicator fast key sequences
are identified for each software function.
Figure 2-1. Example of Fast Key
Sequence Listing
BENCH TOP
CONFIGURATION Bench top configuration requires a 375 Field Communicator, or AMS.
Connect the Field Communicator leads to the terminals labeled “COMM” on
the terminal block, as shown in Figure 2-2 on page 2-2.
Bench top configuration is testing of the transmitter and verifying the
transmitter configuration data. Configuring the transmitter on the bench prior
to installation ensures that all network settings are working correctly.
When using a Field Communicator, any configuration changes made must be
sent to the transmitter using the “Send” key (F2). AMS configuration changes
are implemented by clicking the “Apply” button.
AMS Wireless Configurator
AMS is capable of connecting to devices directly, using a HART modem, or
wirelessly using the Smart Wireless Gateway. When configuring the device,
double click the device icon or right click and select Configure.
Connection Diagrams Bench Hook-Up
Connect the bench equipment as shown in Figure 2-2 and turn the Field
Communicator on by pressing the ON/OFF key or log into AMS. The Field
Communicator or AMS will search for a HART® compatible device and
indicate when it is connected. If the Field Communicator or AMS fail to
connect, it indicates that no device was found. Refer to Section 6:
Troubleshooting.
Field Hook-Up
The wiring for a field hook-up for a Field Communicator or AMS, illustrated in
Figure 2-2, by connecting at “COMM” on the transmitter terminal block.
Figure 2-2. Field Communicator
Connection Diagram
Fast Keys 1, 2, 3, etc.

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July 2009
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Rosemount 848T Wireless
DEFAULT SETTINGS The 848T default configuration is shown below:
Use the C1 option code to have the factory configure each sensor individually.
This option also enables factory configuration of process alerts, update rate,
and channel tag. This option code is not required to configure the
self-organizing network parameters, or to set all of the sensors identically.
DEVICE NETWORK
CONFIGURATION
Join Device to Network The transmitter must be configured in order to communicate with the Smart
Wireless Gateway, and ultimately with the host system. This step is the
wireless equivalent of connecting wires from the transmitter to the host
system.
1. From the Home screen, select 2: Configure.
2. Select 1: Guided Setup.
3. Select 1: Join Device to Network.
Using a Field Communicator or AMS, enter the Network ID and Join Key so
they match the Network ID and Join Key of the Smart Wireless Gateway, and
other devices in the network. If the Network ID and Join Key do not match the
Gateway, the transmitter will not communicate with the network. The Network
ID and Join Key can be obtained from the Smart Wireless Gateway on the
Setup>Network>Settings page on the web server.
Sensor 1 Type J Thermocouple
Sensor 2 Type J Thermocouple
Sensor 3 Type J Thermocouple
Sensor 4 Type J Thermocouple
Engineering Units °C
Number of Lead Wires 2
Sensor Alerts Disabled
Network ID Factory Generated Network Parameters
Join Key Factory Generated Network Parameters
Update Rate 1 Minute
Fast Key 2, 1, 1

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July 2009
Rosemount 848T Wireless
2-4
Configure Update Rate The Update Rate is the frequency a new measurement is taken and
transmitted over the wireless network, is by default one minute. This may be
changed at commissioning, or at any time using AMS Wireless Configurator.
The Update Rate is from 8 seconds to 60 minutes and is user selectable.
1. From the Home screen, select 2: Configure.
2. Select 1: Guided Setup.
3. Select 2: Configure Update Rate.
If using an Emerson gateway, select Yes to enable optimizations. If using
another vendors WirelessHART gateway, select No to disable optimizations
and consult manufacturer’s gateway manual.
SENSOR
CONFIGURATION
Configure Sensor Type Every temperature sensor has unique characteristics, to achieve the most
accurate measurement, configure the input channels of the 848T to match the
specific sensor type.
1. From the Home screen, select 2: Configure.
2. Select 1: Guided Setup.
3. Select 3: Configure Sensors.
4. Select 1: Configure Sensor Type/Connection.
Each input can be configured on the 848T for different sensor types. Select
the desired sensor type and lead wires for each sensor input. If an input is not
being used, “Not Used” should be selected for the sensor type. Refer to the
Sensor Wiring Diagram Figure 3-4 on page 3-4.
Configure Engineering
Units Each input can be configured on the 848T for different engineering units. The
supported units are ° C, ° F, ° R, K, millivolts, ohms, and milliamps.
1. From the Home screen, select 2: Configure.
2. Select 1: Guided Setup.
3. Select 3: Configure Sensors.
4. Select 3: Configure Device Engineering Units.
Removing the Power
Module After the sensor and network parameters have been configured, remove the
power module and close the housing cover. The power module should only be
inserted when the device is ready for commissioning.
Use caution when handling the power module, it may be damaged if dropped
from heights in excess of 20 ft. (6.1 m).
Fast Key 2, 1, 2
Fast Key 2, 1, 3, 1
Fast Key 2, 1, 3, 3

Reference Manual
00809-0100-4848, Rev AA
July 2009
2-5
Rosemount 848T Wireless
ADVANCED
CONFIGURATION
(OPTIONAL)
Configure Process Alerts Alerts allow the user to set the transmitter to provide a notification when the
measurement readings exceed the specified temperature range. A high and
low alert may be established for each sensor input. A process alert is
transmitted if the trigger points are exceeded and alert mode is “on”. An alert
is displayed on a Field Communicator or on the AMS status screen, and will
reset when the value is once again within the user-configured range.
NOTE
The High Alert value must be set higher than the Low Alert value, and both
values must be within the temperature sensor limits.
1. From the Home screen, select 2: Configure.
2. Select 1: Guided Setup.
3. Select 5: Configure Alerts, then follow the on-screen instructions to
complete the configuration process.
The user configures the Trigger Point and Dead Band for each High and Low
alert and when the measurement value exceeds the Trigger Point it activates
the alert. The alert deactivates when the measurement value falls outside the
Dead Band range.
Example:
For the following illustration, the alert is active when the value rises above 100
° C or falls below 0 ° C. The alert turns off when the value falls below 95 ° C or
rises above 5 ° C. Dead Band is a buffer so the alerts do not toggle on and off
when the temperature measurement is close to the Trigger Point.
High Alert Configuration Low Alert Configuration
Trigger Point = 100 ° C Trigger Point = 0 ° C
Dead Band = 5 ° C Dead Band = 5 ° C
Fast Key 2, 1, 5
High Alert On Low Alert OnTrigger Point
Dead
100 ° C
5 ° C
Trigger Point
Dead Band
95 ° C
0 ° C
Band

Reference Manual
00809-0100-4848, Rev AA
July 2009
Rosemount 848T Wireless
2-6
Device Temperature
Engineering Units The Device Temperature reported can be configured for different engineering
units.
To select the sensor temperature unit:
1. From the Home screen, select 2: Configure.
2. Select 2: Manual Setup.
3. Select 6: Device Temperature.
4. Select 3: Unit.
Write Protect The 848T Wireless has a software write protect security feature.
To view write protect security settings:
1. From the Home screen, select 2: Configure.
2. Select 2: Manual Setup.
3. Select 8: Other.
4. Select 1: Write Protect.
AC Power FIlter The AC Power Filter can be set to reject line power noise at either 50 or 60
Hz:
1. From the Home screen, select 2: Configure.
2. Select 2: Manual Setup.
3. Select 8: Other.
4. Select 2: AC Power Filter.
HART Tag The 848T HART Tag (8 characters) can be configured to identify the device:
1. From the Home screen, select 2: Configure.
2. Select 2: Manual Setup.
3. Select 7: Device Information.
4. Select 1: Tag*.
*A long tag (consisting of 32 characters) can be configured using the fast key
sequence by selecting 2: Long Tag
Fast Key 2, 2, 6, 3
Fast Key 2, 2, 8, 1
Fast Key 2, 2, 8, 2
Fast Key 2, 2, 7, 1

Reference Manual
00809-0100-4848, Rev AA
July 2009
2-7
Rosemount 848T Wireless
HART®Menu Tree Options listed in bold type indicate that a selection provides other options. For
ease of operation, changing calibration and setup, such as sensor type,
number of wires, and range values, can be completed in several locations.
Figure 2-3. Field Communicator Menu Tree
1. Overview
2. Congure
3. Service Tools
1. Guided Setup
2. Manual Setup
3. Alert Setup
1. Device Alerts
2. Variables
3. Communications
4.
Routine Maintenance
5. Simulate
1. Join Device to Network
2. Congure Update Rate
3. Congure Sensors
4. Calibrate Sensors
5. Congure Alerts
1. Wireless
2. Sensor 1
3. Sensor 2
4. Sensor 3
5. Sensor 4
6. Device Temperature
7. Device Information
8. Other
1. Sensor 1 Process Alert
2. Sensor 2 Process Alert
3. Sensor 3 Process Alert
4. Sensor 4 Process Alert
1. Network ID
2. Join Device to Network
3. Update Rate
4. Congure Broadcast Power Level
5. Power Mode
6. Power Source
1. Sensor X
2. Status
3. Congure Sensor
4. Unit
5. Type
6. Connection
7. Serial Number
8. Maximum
9. Minimum
1. Electronics Temperature
2. Status
3. Unit
4. Maximum
5. Minimum
1. Tag
2. Long Tag
3. Device
4. Sensor
5. Wireless
1. Write Protect
2. AC Power Filter
3. Measurement and Status Log
4. Accuracy Mode
5. Master Reset
6. Advertise to New Devices
1. Congure Update rate
2. Message 1
3. Message 2
4. Message 3
1. Message
2. Update Rate
1. High Alert
2. Low Alert
1. Mode
2. Trigger Point
3. Dead Band
1. Manufacturer
2. Model
3. Final Assembly Number
4. Universal Rev
5. Field Device Rev
6. Software Rev
7. Hardware Rev
8. Descriptor
9. Message
10. Date
11. Model Number
12. SI Unit Control
13. Country
14. Device ID
1. Sensor 1 S/N
2. Sensor 2 S/N
3. Sensor 3 S/N
4. Sensor 4 S/N
1. Manufacturer
2. Device Type
3. Device Revision
4. Software Revision
5. Hardware Revision
1. Active
2. History 1. Clear Alert History
Display a list of historical alerts
1. Sensor 1
2. Sensor 1 Status
3. Sensor 2
4. Sensor 2 Status
5. Sensor 3
6. Sensor 3 Status
7. Sensor 4
8. Sensor 4 Status
9. Electroncs Temperature
10. Electronics Temperature Status
11. Supply Voltage
12. Supply Voltage Status
13. Last Update Time
1. Join Status
2. Communication Status
3. Join Mode
4. Number of Advertisements Heard
5. Number of Avaliable Neighbors
6. Number of Join Attempts
1. Calibrate Sensor 1
2. Calibrate Sensor 2
3. Calibrate Sensor 3
4. Calibrate Sensor 4
5. Other
1. Sensor X
2. Status
3. Current Upper Trim
4. Current Lower Trim
5. Lower Sensor Trim
6. Upper Sensor Trim
7. Recall Factory Trim
8. RTD 2-wire oset
1. Perform Master Reset
2. Measurement History
3. Advertise to New Devices
1. Process Sensors
2. Electronics Temperature
3. Supply Voltage
1. Active Alerts
2. Communication
Status
3. Sensor 1
4. Sensor 1 Status
5. Sensor 2
6. Sensor 2 Status
7. Sensor 3
8. Sensor 3 Status
9. Sensor 4
10. Sensor 4 Status
11. Last Update Time

Reference Manual
00809-0100-4848, Rev AA
July 2009
Rosemount 848T Wireless
2-8
Fast Key Sequence Table 2-1 lists the fast key sequences for common transmitter functions.
NOTE:
The fast key sequences assume that DD Dev v2, DD v1 is being used.
Table 2-1. 848T Wireless Fast
Key Sequence Function Key Sequence Menu Items
Device Information 2,2,7,3 Manufacturer, Model, Final Assembly Number, Universal,
Field Device, Software, Hardware, Descriptor, Message,
Date, Model Number SI Unit Control, Country, Device ID
Guided Setup 2, 1 Join Device to Network, Configure Update Rate, Configure
Sensors, Calibrate Sensors, Configure Alerts
Manual Setup 2, 2 Wireless, Sensor 1, Sensor 2, Sensor 3, Sensor 4, Device
Temperature, Device Information, Other
Wireless 2, 2, 1 Network ID, Join Device to Network, Update Rate,
Configure Broadcast Power Level, Power Mode, Power
Source
Sensor Calibration 3, 4, 1-4 Current Upper Trim, Current Lower Trim, Lower Sensor
Trim, Upper Sensor Trim, Recall Factory Trim, RTD 2 Wire
Offset