Rosemount Quick Start Guide: Rosemount 848T Wireless Temperature Transmitter Manuals & Guides

Quick Start Guide

00825-0100-4848, Rev HA

April 2021

Rosemount™ 848T Wireless Temperature
Transmitter

Quick Start Guide April 2021

Safety Messages

NOTICE

This guide provides basic guidelines for the Rosemount 848T Temperature Transmitter. It does not
provide instructions for detailed configuration, diagnostics, maintenance, service, troubleshooting.
Refer to the Rosemount 848T Reference Manual for more instruction. The manual and this guide are
also available electronically on Emerson.com/Rosemount

WARNING

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.

• Before connecting a communicator in an explosive atmosphere, ensure the instruments in the

segment are installed in accordance with intrinsically safe or non-incendive field wiring practices.

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.

WARNING

Physical access

Unauthorized personnel may potentially cause significant damage to and/or misconfiguration of end
users’ equipment. This could be intentional or unintentional and needs to be protected against.

Physical security is an important part of any security program and fundamental to protecting your
system. Restrict physical access by unauthorized personnel to protect end users’ assets. This is true for
all systems used within the facility.

CAUTION

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 8-in. (20 cm)

from all persons.

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April 2021 Quick Start Guide

NOTICE

Battery hazards remain when cells are discharged.

• Power modules should be stored in a clean and dry area. For maximum battery life, storage

temperature should not exceed 86 °F (30 °C).

• 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.

Shipping considerations for wireless products.

The unit was shipped to you without the power module installed. Remove the power module prior to
shipping.

Each power module contains two “C” size 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. Consult current regulations and requirements
before shipping.

Contents

Wireless considerations................................................................................................................5

Physical installation...................................................................................................................... 7

Verify operation......................................................................................................................... 12

Reference information............................................................................................................... 14

Product certifications................................................................................................................. 17

Declaration of Conformity..........................................................................................................23

China RoHS................................................................................................................................ 25

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Quick Start Guide April 2021

4 Rosemount 848T Wireless

April 2021 Quick Start Guide

1 Wireless considerations

1.1 Power up sequence

The power module should not be installed on any wireless device until the
Emerson Wireless Gateway (Gateway) is installed and 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
Wireless Gateway Reference Manual.

1.2 Antenna position

The antenna should be positioned vertically and it should be approximately
3 ft. (1 m) from any large structure, building, or conductive surface to allow
for clear communication to other devices.

Figure 1-1: Antenna Position

1.3 Conduit plug

The temporary orange plugs should be replaced with the included conduit
plugs using approved thread sealant.

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A

Quick Start Guide April 2021

Figure 1-2: Conduit Plug

1.4 Field Communicator connections

The power module needs to be connected for the Field Communicator to
interface with the Rosemount 848T Wireless.

Figure 1-3: Connection Diagram

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April 2021 Quick Start Guide

2 Physical installation

2.1 Initial configuration

If the device was ordered with a factory configured Network ID and Join Key,
it should join the network with no user input. If unsure, the Network ID and
the Join Key may be manually entered to match the Gateway’s.

The Network ID and Join Key may be obtained from the Gateway on the
Setup > Network > Settings page on the web server.

The Network ID and Join Key may be changed in the wireless device by using
the following Fast Key sequence.

Function

Wireless 2,1,1 Join Device to Network

Fast Key sequence Menu items

2.2 Sensor configuration

Sensor inputs can be configured for different sensor types. To verify or
change the sensor configuration with a Field Communicator, use the
following Fast Key sequence.

Table 2-1:

Function Fast Key sequence Menu items

Sensor configuration 2,1,3 Configure Sensors

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Quick Start Guide April 2021

2.3 Remote mount

The Rosemount 848T Wireless is designed to be installed only in the Remote
Mount configuration where the sensor is mounted separate from the
Rosemount 848T housing, then connected to the Rosemount 848T via
conduit.

Procedure

1. Install the sensor according to standard installation practices. Be sure
to use thread sealant on all connections.

2. To reduce sensor wiring length, mount the Rosemount 848T
Wireless Transmitter central to all of the measurements. When
installing the Rosemount 848T Wireless, the conduit entries need to
be facing downward. If using the mounting bracket (Option Code
B6), mount to a 2-in. pipe.

3. Run wiring (and conduit, if necessary) from the sensor to the
Rosemount 848T. For an easier installation, use the outside conduit
entries as shown below. Any unused conduit entries should be sealed
with approved sealant using the included threaded conduit plugs.

8 Rosemount 848T Wireless

A

A A AB

A

April 2021 Quick Start Guide

A. Conduit entry
B. Conduit plug

4. Pull the wiring through the threaded conduit entry of the Rosemount
848T.

5. Attach the sensor wiring to the terminals as indicated on the wiring
diagram. Note that terminal screw 5 is for attaching the shield wire of
the sensor to the device. See Rosemount 848T Wireless Reference

Manual for more information.

6. To connect the power module, remove the plastic plug from the
receptacle.

A. Plastic plug

7. After initial installation, close the housing cover securely. Always
ensure a proper seal by installing the electronics housing cover so
that metal touches metal, but do not overtighten.

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