Emerson Rosemount 848T Bedienungsanleitung

Quick Start Guide

00825-0100-4697, Rev WB

December 2021

Rosemount™ 848T FOUNDATION™ Fieldbus

High Density Temperature Transmitter

Contents

Introduction.................................................................................................................................3

Mount the transmitter..................................................................................................................7

Wire and apply power................................................................................................................ 15

Verify the tag............................................................................................................................. 22

Verify the transmitter configuration...........................................................................................23

Product certifications................................................................................................................. 24

Declaration of conformity.......................................................................................................... 36

China RoHS................................................................................................................................ 38

Quick Start Guide December 2021

2 Rosemount 848T

1 Introduction

The Rosemount 848T is optimized for process temperature measurement

because it can simultaneously measure eight separate and independent

temperature points with one transmitter. You can connect multiple

temperature sensor types to each transmitter. In addition, the Rosemount

848T can accept 4-20 mA inputs. The enhanced measurement capability of

the Rosemount 848T allows it to communicate these variables to any

FOUNDATION™ Fieldbus host or configuration tool.

1.1 About this guide

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.

1.2 Hazard messages

This document uses the following criteria for hazard messages based on

ANSI standards Z535.6-2011 (R2017).

DANGER

Serious injury or death will occur if a hazardous situation is not avoided.

WARNING

Serious injury or death could occur if a hazardous situation is not avoided.

CAUTION

Minor or moderate injury will or could occur if a hazardous situation is not

avoided.

NOTICE

Data loss, property damage, hardware damage, or software damage can

occur if a situation is not avoided. There is no credible risk of physical injury.

December 2021 Quick Start Guide

Quick Start Guide 3

Physical access

NOTICE

Unauthorized personnel can potentially cause significant damage and/or

misconfiguration of end users' equipment. Protect against all intentional or

unintentional unauthorized use.

Physical security is an important part of any security program and

fundamental to protecting your system. Restrict physical access to protect

users' assets. This is true for all systems used within the facility.

1.3 Safety messages

Read this manual before working with the product. For personal and system

safety, and for optimum product performance, ensure you thoroughly

understand the contents before installing, using, or maintaining this

product.

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. Review the approvals section of this manual for any

restrictions associated with a safe installation.

Before connecting a Field Communicator in an explosive atmosphere, make

sure the instruments in the loop are installed in accordance with intrinsically

safe or non-incendive field wiring practices.

WARNING

Failure to follow these installation guidelines could result in death or

serious injury.

Ensure the transmitter is installed by qualified personnel and in accordance

with applicable code of practice.

WARNING

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.

Quick Start Guide December 2021

4 Rosemount 848T

WARNING

Electrical shock could cause death or serious injury.

If the sensor is installed in a high-voltage environment and a fault or

installation error occurs, high voltage may be present on transmitter leads

and terminals.

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

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 7.9 in. (20 cm) from all persons.

NOTICE

Battery hazards remain when cells are discharged.

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 any re-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.

December 2021 Quick Start Guide

Quick Start Guide 5

1.4 Product recycling/disposal

Recycling of equipment and packaging should be taken into consideration

and disposed of in accordance with local and national legislation/

regulations.

Quick Start Guide December 2021

6 Rosemount 848T

2 Mount the transmitter

2.1 Mount to a DIN rail without an enclosure

To mount the transmitter to a DIN rail without an enclosure, follow these

steps:

Procedure

1. Pull up the DIN rail mounting clip located on the top back side of the

transmitter.

2. Hinge the DIN rail into the slots on the bottom of the transmitter.

3. Tilt the transmitter and place onto the DIN rail. Release the mounting

clip. The transmitter should be securely fastened to the DIN rail.

Figure 2-1: Mount the transmitter to a DIN rail

A. Rosemount 848T without installed enclosure

B. DIN rail mounting clip

C. DIN rail

2.2 Mount to a panel from an aluminum junction box

Prerequisites

Use four 1/4-20 x 1.25-in. screws.

Procedure

Mount the transmitter to a panel from inside the junction box using one of

the following dimension drawings.

December 2021 Quick Start Guide

Quick Start Guide 7

Figure 2-2: Aluminum junction box with cable glands (option code JA4)

10.21

[259]

1.70

[43]

6.70

[170]

3.67

[93]

.80

[20]

2.30

[58]

2.27

[58]

1.33

[34]

1.88

[48]

3.98

[101]

8.42

[214] 6.00

[152]

A. Nameplate

B. Removable wiring connector

C. Security switch

D. Simulation switch

E. External ground screw (optional)

Dimensions are in inches (millimeters).

Quick Start Guide December 2021

8 Rosemount 848T

Figure 2-3: Aluminum junction box with plugged holes (option code

JA5)

10.21

[259]

1.70

[43]

6.70

[170] CD

.80

[20]

2.30

[58]

3.21

[81]

1.33

[34]

1.88

[48]

3.97

[101]

7.14

[181]

6.00

[152]

A. Nameplate

B. Removable wiring connection

C. Security switch

D. Simulation switch

E. External ground screw (optional)

Dimensions are in inches (millimeters).

2.3 Mount to a panel from a stainless steel junction box

Prerequisites

Use two 1/4-20 x 1/2-in. screws.

Procedure

Mount the transmitter to a panel from inside the junction box using one of

the following dimension drawings.

December 2021 Quick Start Guide

Quick Start Guide 9

Figure 2-4: Stainless steel junction box with cable glands (option code

JS2)

9.91 (231)

7.7 (196)

1.8 (46)

1.1 (28) 1.73 (44)

2.4 (62)

1.2 (30) 1.8 (47)

4.0 (102)

9.14 (232.2)

7.72 (196)

6.61 (168)

A B

D E

A. Top view

B. 3-D view

C. Ground screw

D. Front view

E. Side view

Dimensions are in inches (millimeters).

Quick Start Guide December 2021

10 Rosemount 848T

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