Emerson Rosemount 644 Bedienungsanleitung

Quick Start Guide

00825-0200-4728, Rev LC

April2023

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........................................................................................................ 44

China RoHS................................................................................................................................. 48

Quick Start Guide April2023

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 Emerson 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 in 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2023 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. Kindly 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 that 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2023

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

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2023 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2023

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.

April2023 Quick Start Guide

Quick Start Guide 7

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.

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. Universal head (transmitter inside)

D. Standard extension

E. Conduit entry

Quick Start Guide April2023

8 Rosemount 644

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.

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)

April2023 Quick Start Guide

Quick Start Guide 9

E. Conduit entry

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).

Quick Start Guide April2023

10 Rosemount 644

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