Emerson Rosemount 644 Bedienungsanleitung

Quick Start Guide

00825-0200-4728, Rev KB

April 2021

Rosemount™ 644 Temperature

Transmitter

with 4–20 mA HART® Protocol (Revision 5

and 7)

Contents

About this guide...........................................................................................................................3

System readiness......................................................................................................................... 5

Transmitter installation................................................................................................................ 6

Safety instrumented systems..................................................................................................... 24

Product certifications................................................................................................................. 25

Declaration of Conformity..........................................................................................................43

China RoHS................................................................................................................................ 47

Quick Start Guide April 2021

2 Rosemount 644

1 About this guide

This guide provides basic guidelines for installing the Rosemount 644

Temperature Transmitter. It does not provide instructions for detailed

configuration, diagnostics, maintenance, service, troubleshooting, or

installation. Refer to the Rosemount 644 Reference Manual for more

instruction. The manual and this guide are also available electronically on

Emerson.com/Rosemount.

Safety messages

WARNING

The products described in this document are NOT designed for nuclear-

qualified applications.

Using non-nuclear qualified products in applications that require nuclear-

qualified hardware or products may cause inaccurate readings.

For information on Rosemount nuclear-qualified products, contact your

local Emerson Sales Representative.

Follow instructions

Failure to follow these installation guidelines could result in death or serious

injury.

Ensure only qualified personnel perform the installation.

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.

April 2021 Quick Start Guide

Quick Start Guide 3

WARNING

Explosions

Explosions could result in death or serious injury.

Installation of the transmitters in a hazardous environment must be in

accordance with the appropriate local, national, and international

standards, codes, and practices. Please review the Product Certifications

section for any restrictions associated with a safe installation.

Do not remove the connection head cover in explosive atmospheres

when the circuit is live.

Before connecting a handheld communicator in an explosive

atmosphere, ensure the instruments are installed in accordance with

intrinsically safe or non-incendive field wiring practices.Verify the

operating atmosphere of the transmitter is consistent with the

appropriate hazardous locations certifications.

All connection head covers must be fully engaged to meet explosion-

proof requirements.

Process leaks

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

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.

CAUTION

Conduit/cable entries

Unless otherwise marked, the conduit/cable entries in the housing

enclosure use a ½–14 NPT form. Only use plugs, adapters, glands, or

conduit with a compatible thread form when closing these entries.

Entries marked "M20" are M20 x 1.5 thread form.

When installing in a hazardous location, use only appropriately listed or

Ex certified plugs, glands, or adapters in cable/conduit entries.

Quick Start Guide April 2021

4 Rosemount 644

2 System readiness

2.1 Confirm HART revision capability

If using HART®-based control or asset management systems, confirm the

HART capability of those systems prior to transmitter installation. Not all

systems are capable of communicating with HART Revision 7 Protocol. You

can configure the transmitter for either HART Revision 5 or 7.

2.2 Confirm correct device driver

Procedure

1. Verify the latest Device Driver files are loaded on your systems to

ensure proper communications.

2. Download the latest Device Driver at Emerson.com/Device-Install-

Kits/Device-Install-Kit-Search

Table 2-1 provides the information necessary to ensure the correct

Device Driver files and documentation are being used.

Table 2-1: Device Revisions and Files

Software

date

NAMUR

Software

revision

HART®

Software

revision

HART

Universal

revision(1)

Device

revision(2)

Manual

Document

Number

Changes to

Software(3)

June 2012 1.1.1 3 5 8 00809-010

0-4728

See (3) for

list of

changes.

7 9

(1) NAMUR software revision is located on the hardware tag of the device. HART software

revision can be read using a HART communication tool.

(2) Device Driver file names use Device and DD Revision (e.g. 10_01. HART Protocol) is designed

to enable legacy device driver revisions to continue to communicate with new HART devices.

To access new functionality, download the new Device Driver. Emerson recommends

downloading new Device Driver files to ensure full functionality.

(3) HART Revision 5 and 7 Selectable, Dual Sensor support, Safety Certified, Advanced

Diagnostics (if ordered), Enhanced Accuracy and Stability (if ordered).

April 2021 Quick Start Guide

Quick Start Guide 5

3 Transmitter installation

3.1 Mount the transmitter

Mount the transmitter at a high point in the conduit run to prevent moisture

from draining into the transmitter housing.

3.1.1 Head mount transmitter with DIN plate style sensor installation

WARNING

Enclosure

Enclosure covers must be fully engaged to meet explosion-proof

requirements.

Procedure

1. Attach the thermowell to the pipe or process container wall.

2. Install and tighten the thermowell before applying process pressure.

3. Verify the transmitter failure mode switch position.

4. Assemble the transmitter to the sensor. Push the transmitter

mounting screws through the sensor mounting plate.

5. Wire the sensor to the transmitter.

6. Insert the transmitter-sensor assembly into the connection head.

a) Thread the transmitter mounting screw into the connection

head mounting holes.

b) Assemble the extension to the connection head.

c) Insert the assembly into the thermowell.

7. If using a cable gland, properly attach the cable gland to a housing

conduit entry.

8. Insert the shielded cable leads into the connection head through the

cable entry.

9. Connect the shielded power cable leads to the transmitter power

terminals.

Avoid contact with sensor leads and sensor connections.

10. Connect and tighten the cable gland.

11. Install and tighten the connection head cover.

Quick Start Guide April 2021

6 Rosemount 644

A. Connection head cover

B. Connection head

C. Thermowell

D. Transmitter mounting screws

E. Integral mount sensor with flying leads

F. Extension

3.1.2 Head mount transmitter with threaded sensor installation (two or

three conduit entries)

WARNING

Enclosure

Enclosure covers must be fully engaged to meet explosion-proof

requirements.

Procedure

1. Attach the thermowell to the pipe or process container wall.

2. Install and tighten thermowells before applying process pressure.

3. Attach necessary extension nipples and adapters to the thermowell.

4. Seal the nipple and adapter threads with silicone tape.

5. Screw the sensor into the thermowell. Install drain seals if required

for severe environments or to satisfy code requirements.

6. Verify the transmitter failure mode switch is in the desired position.

7. Verify the correct installation of Integral Transient Protection (option

code T1).

a) Ensure the transient protector unit is firmly connected to the

transmitter puck assembly.

b) Ensure the transient protector power leads are adequately

secured under the transmitter power terminal screws.

c) Verify the transient protector’s ground wire is secured to the

internal ground screw found within the universal head.

April 2021 Quick Start Guide

Quick Start Guide 7

Note

The transient protector requires the use of an enclosure of at least

3.5-in. (89 mm) in diameter.

8. Pull the sensor wiring leads through the universal head and

transmitter center hole.

9. Mount the transmitter in the universal head by threading the

transmitter mounting screws into the universal head mounting

holes.

10. Mount the transmitter-sensor assembly into the thermowell, or

remote mount if desired.

11. Seal adapter threads with silicone tape.

12. Pull the field wiring leads through the conduit into the universal

head. Attach the sensor and power leads to the transmitter.

Avoid contact with other terminals.

13. Install and tighten the universal head cover.

A. Threaded thermowell

B. Threaded style sensor

C. Standard extension

D. Universal head (transmitter inside)

E. Conduit entry

3.1.3 Field mount transmitter with threaded sensor installation

WARNING

Enclosure

Enclosure covers must be fully engaged to meet explosion-proof

requirements.

Procedure

1. Attach the thermowell to the pipe or process container wall. Install

and tighten thermowells before applying process pressure.

Quick Start Guide April 2021

8 Rosemount 644

2. Attach necessary extension nipples and adapters to the thermowell.

3. Seal the nipple and adapter threads with silicone tape.

4. Screw the sensor into the thermowell. Install drain seals if required

for severe environments or to satisfy code requirements.

5. Verify the transmitter failure mode switch is in the desired position.

6. Mount the transmitter-sensor assembly into the thermowell or

remote mount if desired.

7. Seal adapter threads with silicone tape.

8. Pull the field wiring leads through the conduit into the field mount

housing. Wire the sensor and power leads to the transmitter.

Avoid contact with other terminals.

9. Install and tighten the covers of two compartments.

A. Threaded thermowell

B. Threaded style sensor

C. Standard extension

D. Field mount housing (transmitter inside)

E. Conduit entry

April 2021 Quick Start Guide

Quick Start Guide 9

3.2 Wire and apply power

3.2.1 Wire the sensor to the transmitter

Figure 3-1: Rosemount 644 Head Mount - Single and Dual Input Wiring

Diagrams

•The transmitter must be configured for at least a three-wire RTD in order

to recognize an RTD with a compensation loop.

•Emerson provides a four-wire sensors for all single element RTDs. Use

these RTDs in three-wire configurations by leaving the unneeded leads

disconnected and insulated with electrical tape.

Figure 3-2: Rosemount 644 Field Mount — Single and Dual Input Wiring

Diagrams

3.2.2 Power the transmitter

An external power supply is required to operate the transmitter.

Procedure

1. Remove the housing cover (if applicable).

2. Connect the positive power lead to the “+” terminal. Connect the

negative power lead to the “–” terminal.

Quick Start Guide April 2021

10 Rosemount 644

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