Rosemount 644 Temperature Transmitter Quick Start Guide

Quick Start Guide

00825-0200-4728, Rev LB

May 2022

Rosemount™ 644 Temperature
Transmitter

with 4–20 mA HART® Protocol (Revision 5
and 7)

Quick Start Guide May 2022

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

2 Rosemount 644

May 2022 Quick Start Guide

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 nuclear­qualified applications.

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

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Quick Start Guide May 2022

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 explosion­proof 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.

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May 2022 Quick Start Guide

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

June 2012 1.1.1 3 5 8 00809-010

NAMUR
Software
revision

®

HART
Software
revision

HART
Universal

(1)

revision

7 9

Device
revision

(2)

Manual
Document
Number

0-4728

Changes to
Software

(3)

See

for
list of
changes.

(3)

(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).

Quick Start Guide 5

Quick Start Guide May 2022

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.

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May 2022 Quick Start Guide

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.

Quick Start Guide 7

Quick Start Guide May 2022

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

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.

8 Rosemount 644

A

C

B

D

E

May 2022 Quick Start Guide

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

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Quick Start Guide May 2022

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.

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May 2022 Quick Start Guide

If a transient protector is being used, the power leads will now be
connected to the top of the transient protector unit. See the
transient label for indication of “+” and “–“ terminal connections.

3. Tighten the terminal screws. When tightening the sensor and power
wires, the max torque is 6 in-lb (0.7 N-m).

4. Reattach and tighten the cover (if applicable).

WARNING

Enclosue

Enclosure covers must be fully engaged to meet explosion-proof
requirements.

5. Apply power (12–42 Vdc).

3.2.3 Load limitation

The power required across the transmitter power terminals is 12 to 42.4
Vdc; the power terminals are rated to 42.4 Vdc. To prevent damaging the
transmitter, do not allow terminal voltage to drop below 12.0 Vdc when
changing the configuration parameters.

3.2.4 Ground the transmitter

To ensure proper grounding, it is important the instrument cable shield be:

• Trimmed close and insulated from touching the transmitter housing

• Connected to the next shield if cable is routed through a junction box

• Connected to a good earth ground at the power supply end

Note

Shielded twisted pair cable should be used for best results. Use 24 AWG or
larger wire and do not exceed 5,000 ft. (1500 m).

Ungrounded thermocouple, mV, and RTD/Ohm inputs

Each process installation has different requirements for grounding. Use the
grounding options recommended by the facility for the specific sensor type,
or begin with grounding option 1 (the most common).

Quick Start Guide 11

A

B

C

DCS

D

Quick Start Guide May 2022

Ground the transmitter: option 1

Procedure

1. Connect sensor wiring shield to the transmitter housing.

2. Ensure the sensor shield is electrically isolated from surrounding
fixtures that may be grounded.

3. Ground signal wiring shield at the power supply end.

A. Sensor wires

B. Transmitter

C. Shield ground point

D. 4-20 mA loop

12 Rosemount 644

A

B

C

D

DCS

May 2022 Quick Start Guide

Ground the transmitter: option 2

Procedure

1. Connect signal wiring shield to the sensor wiring shield.

2. Ensure the two shields are tied together and electrically isolated from
the transmitter housing.

3. Ground shield at the power supply end only.

4. Ensure the sensor shield is electrically isolated from the surrounding
grounded fixtures.

A. Sensor wires

B. Transmitter

C. Shield ground point

D. 4-20 mA loop

Note

Connect shields together, electrically isolated from the transmitter.

Quick Start Guide 13

DCS

A

B

C

D

Quick Start Guide May 2022

Ground the transmitter: option 3

Procedure

1. Ground sensor wiring shield at the sensor if possible.

2. Ensure the sensor wiring and signal wiring shields are electrically
isolated from the transmitter housing.

3. Do not connect the signal wiring shield to the sensor wiring shield.

4. Ground the signal wiring shield at the power supply end.

A. Sensor wires

B. Transmitter

C. Shield ground point

D. 4-20 mA loop

14 Rosemount 644

DCS

A

B

C

D

May 2022 Quick Start Guide

Grounded thermocouple inputs

Ground the transmitter: option 4

Procedure

1. Ground sensor wiring shield at the sensor.

2. Ensure the sensor wiring and signal wiring shields are electrically
isolated from the transmitter housing.

3. Do not connect the signal wiring shield to the sensor wiring shield.

4. Ground signal wiring shield at the power supply end.

A. Sensor wires

B. Transmitter

C. Shield ground point

D. 4–20 mA loop

3.3

Set the alarm switch

Set the alarm switch before putting the device into operation.

Procedure

1. Set the loop to manual (if applicable) and disconnect the power.

2. Remove the LCD display by detaching from the transmitter (if
applicable).

3. Set the switch to the desired position.
H indicates High; L indicates Low.

4. Reattach the LCD display to the transmitter (if applicable).

5. Reattach the housing cover. Ensure covers must be fully engaged to
meet explosion-proof requirements.

6. Apply power and set the loop to automatic control (if applicable).

Quick Start Guide 15

A

Rosemount 644 Transmitter

Rosemount 644 Field Mount

Quick Start Guide May 2022

Figure 3-3: Alarm Switch Placement

A. Alarm switch

Note

If using an LCD display, remove the display by detaching it from the
top of the device, set the switch to the desired position, reattach the
LCD display, and reattach the housing cover.

WARNING

Enclosure

Enclosure covers must be fully engaged to meet explosion-proof
requirements.

3.4 Verify configuration

Upon receiving your transmitter, verify its configuration using any HART®­compliant configuration tool. See the Rosemount 644 Reference Manual for
configuration instructions using AMS Device Manager.

The transmitter communicates using the Field Communicator
(communication requires a loop resistance between 250 and 1100 ohms).
Do not operate when power is below 12 Vdc at the transmitter terminal. See
the Field Communicator Reference Manual for more information.

3.4.1 Verify configuration with a Field Communicator

To verify configuration, you must install a Rosemount 644 DD (Device
Descriptor) on the Field Communicator.

Fast Key sequences for the latest DD are shown in Table 3-1. For Fast Key
sequences using legacy DD's, contact your local Emerson representative.

Perform the following steps to determine if an upgrade is required.

16 Rosemount 644

May 2022 Quick Start Guide

Procedure

1. Connect the sensor.
See the wiring diagram located on the device’s top label.

2. Connect the bench power supply to the power terminals (“+” or “–”).

3. Connect a Field Communicator to the loop across a loop resistor or at
the power/signal terminals on the transmitter.

The following message will appear if the communicator has a previous
version of the DDs:

Device Description Not Installed…The Device
Description for manufacturer 0x26 model 0x2618 dev
rev 8/9 is not installed on the System Card…see
Programming Utility for details on Device
Description updates…Do you wish to proceed in
forward compatibility mode?

If this notice does not appear, the latest DD is installed. If the latest version is
not available, the communicator will communicate properly; however, when
the transmitter is configured to utilize advanced transmitter features, there
will be trouble communicating and a prompt to turn off the communicator
will display. To prevent this from happening, upgrade to the latest DD or
answer NO to the question and default to the generic transmitter
functionality.

Note

Emerson recommends installing the latest DD to access the complete
functionality. Visit Emerson.com/Field-Communicator for information on
updating the DD Library.

Quick Start Guide 17

Quick Start Guide May 2022

3.4.2 Field Communicator user interface

Two user interfaces are available to configure this device.

Figure 3-4 may be used for transmitter configuration and startup.

Figure 3-4: Device Dashboard Field Communicator Interface

Table 3-1: Device Revision 8 and 9 (HART® 5 and 7), DD Revision 1 Fast
Key Sequence

Function HART 5 HART 7

Alarm values 2, 2, 5, 6 2, 2, 5, 6

Analog calibration 3, 4, 5 3, 4, 5

Analog output 2, 2, 5, 1 2, 2, 5, 1

Average temperature setup 2, 2, 3, 3 2, 2, 3, 3

Burst mode 2, 2, 8, 4 2, 2, 8, 4

Comm status N/A 1, 2

Configure additional messages N/A 2, 2, 8, 4, 7

Configure Hot Backup

D/A trim 3, 4, 4, 1 3, 4, 4, 1

Damping values 2, 2, 1, 5 2, 2, 1, 6

Date 2, 2, 7, 1, 2 2, 2, 7, 1, 3

Display setup 2, 1, 4 2, 1, 4

Descriptor 2, 2, 7, 1, 4 2, 2, 7, 1, 5

18 Rosemount 644

™

2, 2, 4, 1, 3 2, 2, 4, 1, 3

May 2022 Quick Start Guide

Table 3-1: Device Revision 8 and 9 (HART® 5 and 7), DD Revision 1 Fast
Key Sequence (continued)

Function HART 5 HART 7

Device information 1, 8, 1 1, 8, 1

Differential temperature setup 2, 2, 3, 1 2, 2, 3, 1

Drift alert 2, 2, 4, 2 2, 2, 4, 2

Filter 50/60 Hz 2, 2, 7, 4, 1 2, 2, 7, 4, 1

First good temperature setup 2, 2, 3, 2 2, 2, 3, 2

Hardware revision 1, 8, 2, 3 1, 8, 2, 3

HART lock N/A 2, 2, 9, 2

Intermittent sensor detect 2, 2, 7, 4, 2 2, 2, 7, 4, 2

Loop test 3, 5, 1 3, 5, 1

Locate device N/A 3, 4, 6, 2

Lock status N/A 1, 8, 3, 8

LRV (Lower Range Value) 2, 2, 5, 5, 3 2, 2, 5, 5, 3

LSL (Lower Sensor Limit) 2, 2, 1, 7, 2 2, 2, 1, 8, 2

Message 2, 2, 7, 1, 3 2, 2, 7, 1, 4

Open sensor holdoff 2, 2, 7, 3 2, 2, 7, 3

Percent range 2, 2, 5, 2 2, 2, 5, 2

Sensor 1 configuration 2, 1, 1 2, 1, 1

Sensor 2 configuration 2, 1, 1 2, 1, 1

Sensor 1 serial number 2, 2, 1, 6 2, 2, 1, 7

Sensor 2 serial number 2, 2, 2, 7 2, 2, 2, 8

Sensor 1 type 2, 2, 1, 2 2, 2, 1, 3

Sensor 2 type 2, 2, 2, 2 2, 2, 2, 3

Sensor 1 unit 2, 2, 1, 4 2, 2, 1, 5

Sensor 2 unit 2, 2, 2, 4 2, 2, 2, 5

Sensor 1 status N/A 2, 2, 1, 2

Sensor 2 status N/A 2, 2, 2, 2

Simulate digital signal N/A 3, 5, 2

Software revision 1, 8, 2, 4 1, 8, 2, 4

Tag 2, 2, 7, 1, 1 2, 2, 7, 1, 1

Quick Start Guide 19

Quick Start Guide May 2022

Table 3-1: Device Revision 8 and 9 (HART® 5 and 7), DD Revision 1 Fast
Key Sequence (continued)

Function HART 5 HART 7

Long tag N/A 2, 2, 7, 1, 2

Terminal temperature 2, 2, 7, 1 2, 2, 8, 1

URV (Upper Range Value) 2, 2, 5, 5, 2 2, 2, 5, 5, 2

USL (Upper Sensor Limit) 2, 2, 1, 7, 2 2, 2, 1, 8, 2

Variable mapping 2, 2, 8, 5 2, 2, 8, 5

2-wire offset sensor 1 2, 2, 1, 9 2, 2, 1, 10

2-wire offset sensor 2 2, 2, 2, 9 2, 2, 2, 10

3.4.3 Input or verify Callendar Van-Dusen constants

If using sensor matching with this combination of a transmitter and sensor,
verify the constants input.

Procedure

1. From the HOME screen, select 2 Configure → 2 Manual Setup → 1
Sensor.

2. Set the control loop to manual and select OK.

3. At the ENTER SENSOR TYPE prompt, select Cal VanDusen.

4. At the ENTER SENSOR CONNECTION prompt, select the appropriate
number of wires.

5. Enter the Ro, Alpha, Delta, and Beta values from the stainless steel
tag attached to the special-order sensor when prompted.

6. Return the control loop to automatic control and select OK.

7. To disable the transmitter-sensor matching feature from the HOME
screen select 2 Configure → 2 Manual Setup → 1 Sensor → 10
Sensor Matching-CVD.

8. Choose the appropriate sensor type from the ENTER SENSOR TYPE
prompt.

3.4.4 Verify configuration with local operator interface (LOI)

The optional LOI can be used for commissioning the device. The LOI is a two­button design. To activate the LOI, push any button.

LOI button functionality is shown on the bottom corners of the display. See

Table 3-2 and Figure 3-6 for button operation and menu information.

20 Rosemount 644

May 2022 Quick Start Guide

Figure 3-5: Local Operator Interface

Table 3-2: LOI Button Operation

Button

Left No SCROLL

Right Yes ENTER

Figure 3-6: LOI Menu

Quick Start Guide 21

Quick Start Guide May 2022

3.4.5 Switch HART Revision mode

Not all systems are capable of communicating with HART® Revision 7
Protocol. You can configure this transmitter for either HART Revision 5 or 7
using a HART capable configuration tool.

Updated configuration menus include a HART Universal Revision parameter
that can be configured to 5 or 7 if accessible by your system. See Table 3-1
for the Fast Key sequence.

If the HART configuration tool is not capable of communicating with HART
Revision 7, the configuration menus in Table 3-1 will not be available. To
switch the HART Universal Revision parameter from generic mode, follow
the instructions below.

Procedure

Go to Configure → Manual Setup → Device Information → Identification
→ Message.

a) To change your device to HART Revision 7, enter HART7 in the

Message field.

b) To change your device to HART Revision 5, enter HART5 in the

Message field.

Note

See Table 3-1 to change HART Revision when the correct Device Driver is
loaded.

3.5

Perform a loop test

The loop test command verifies transmitter output, loop integrity, and
operation of any recorders or similar devices installed in the loop.

3.5.1 Perform a loop test using a Field Communicator

Procedure

1. Connect an external ampere meter in series with the transmitter loop
(so the power to the transmitter goes through the meter at some
point in the loop).

2. From the Home screen, enter the Fast Key sequence.

Device dashboard Fast Keys

3. In the test loop, verify the transmitter’s actual mA output and the
HART mA reading are the same value.

If the readings do not match, either the transmitter requires an
output trim or the meter is malfunctioning.

22 Rosemount 644

3, 5, 1

May 2022 Quick Start Guide

After completing the test, the display returns to the loop test screen
and allows the user to choose another output value.

4. To end the loop test, select End and Enter.

3.5.2 Perform a loop test using Device Manager

Procedure

1. Right click on the device and select Service Tools.

2. In the left navigation pane select Simulate.

3. On the Simulate tab in the Analog Output Verification group box,
select the Perform Loop Test button.

4. Follow the guided instructions and select Apply when complete.

3.5.3 Perform a loop test using the LOI

Reference the figure below to find the path to the Loop Test in the LOI
menu.

Figure 3-7: Configuring the Tag with LOI

Quick Start Guide 23

Quick Start Guide May 2022

4 Safety instrumented systems

For Safety Certified installations, refer to the Rosemount 644 Reference

Manual. The manual is available electronically at Emerson.com/Rosemount

or by contacting an Emerson representative.

24 Rosemount 644

May 2022 Quick Start Guide

5 Product certifications

Rev 4.15

5.1 European Directive Information

A copy of the EU Declaration of Conformity can be found at the end of the
Quick Start Guide. The most recent revision of the EU Declaration of
Conformity can be found at Emerson.com/Rosemount.

5.2 Ordinary Location Certification

As standard, the transmitter has been examined and tested to determine
that the design meets the basic electrical, mechanical, and fire protection
requirements by a nationally recognized test laboratory (NRTL) as accredited
by the Federal Occupational Safety and Health Administration (OSHA).

5.3 North America

The US National Electrical Code® (NEC) and the Canadian Electrical Code
(CEC) permit the use of Division marked equipment in Zones and Zone
marked equipment in Divisions. The markings must be suitable for the area
classification, gas, and temperature class. This information is clearly defined
in the respective codes.

5.4 USA

5.4.1 E5 USA Explosion-proof, Non-Incendive, Dust Ignition-proof

Certificate:

Standards:

Markings:

5.4.2 I5 USA Intrinsic Safety and Non-Incendive

Certificate:

Standards:

Markings:

Quick Start Guide 25

1091070

FM Class 3600: 2011, FM Class 3615: 2006, FM Class 3616:
2011, ANSI/ISA 60079-0: Ed. 5, UL Std. No. 50E, CAN/CSA
C22.2 No. 60529-05

XP CL I, DIV 1, GP B, C, D; DIP CL II / III, DIV 1, GP E, F, G;
T5(-50 °C ≤ Ta ≤ +85 °C); Type 4X; IP66; See I5 description for
Non-Incendive markings.

1091070

FM Class 3600: 2011, FM Class 3610: 2010, FM Class 3611:
2004, ANSI/ISA 60079-0: Ed. 5, UL Std. No. 60079-11: Ed. 6,
UL Std. No. 50E, CAN/CSA C22.2 No. 60529-05

IS CL I/II/III, DIV I, GP A, B, C, D, E, F, G; CL I ZONE 0 AEx ia IIC;
NI CL I, DIV 2, GP A, B, C, D

Quick Start Guide May 2022

Special Conditions for Safe Use (X):

1. When no enclosure option is selected, the Rosemount 644
Temperature Transmitter shall be installed in a final enclosure
meeting type of protection IP20 and meeting the requirements of
ANSI/ISA 61010-1 and ANSI/ISA 60079-0.

2. Option code K5 is only applicable with a Rosemount enclosure.
However, K5 is not valid with enclosure options S1, S2, S3, or S4.

3. An enclosure option must be selected to maintain a Type 4X rating.

4. The Rosemount 644 Transmitter optional housings may contain
aluminum and is considered a potential risk of ignition by impact or
friction. Care must be taken during installation and use to prevent
impact and friction.

5.5 Canada

5.5.1 I6 Canada Intrinsic Safety and Division 2

Certificate:

Standards:

Markings:

1091070

CAN/CSA C22.2 No. 0-10, CSA Std C22.2 No. 25-1966, CAN/
CSA-C22.2 No. 94-M91, CSA Std C22.2 No. 142-M1987, CAN/
CSA-C22.2 No. 157-92, CSA Std C22.2 No. 213-M1987, C22.2
No 60529-05, CAN/CSA C22.2 No. 60079-0:11, CAN/CSA
C22.2 No. 60079-11:14, CAN/CSA Std. No. 61010-1-12

[HART®] IS CL I GP A, B, C, D T4/T6; CL I, DIV 2, GP A, B, C, D
[Fieldbus/PROFIBUS®] IS CL I GP A, B, C, D T4; CL I, ZONE 0 IIC;

CL I, DIV 2, GP A, B, C, D

5.5.2 K6 Canada Explosion-proof, Dust Ignition-proof, Intrinsic Safety and Division 2

Certificate:

Standards:

Markings:

1091070

CAN/CSA C22.2 No. 0-10, CSA Std C22.2 No. 25-1966, CSA
Std. C22.2 No. 30-M1986, CAN/CSA-C22.2 No. 94-M91, CSA
Std C22.2 No. 142-M1987, CAN/CSA-C22.2 No. 157-92, CSA
Std C22.2 No. 213-M1987, C22.2 No 60529-05, CAN/CSA
C22.2 No. 60079-0:11, CAN/CSA C22.2 No. 60079-11:14,
CAN/CSA Std. No. 61010-1-12

CL I/II/III, DIV 1, GP B, C, D, E, F, G
See I6 description for Intrinsic Safety and Division 2 markings

26 Rosemount 644

May 2022 Quick Start Guide

5.6 Europe

5.6.1 E1 ATEX Flameproof

Certificate:

Standards:

Markings:

DEKRA 19ATEX0076 X

EN IEC 60079-0: 2018, EN 60079-1: 2014

II 2 G Ex db IIC T6…T1 Gb, T6(–60 °C ≤ Ta ≤ +70 °C), T5…

T1(–60 °C ≤ Ta ≤ +80 °C)

Special Conditions for Safe Use (X):

1. Flameproof joints are not intended for repair.

2. Non-Standard Paint options may cause risk from electrostatic
discharge. Avoid installations that cause electrostatic build-up on
painted surfaces, and only clean the painted surfaces with a damp
cloth. If paint is ordered through a special option code, contact the
manufacturer for more information.

Additional Specific Conditions of Use (X) when “XA” designation is
ordered:

Guard DIN Style sensors against impacts greater than 4J.

Process Temperature
Range at Sensor
Connection (°C)

-60 °C to +70 °C -60 °C to +70 °C T6

-60 °C to +80 °C -60 °C to +80 °C T5…T1

(1) Sensor Connection is where the sensor threads into the transmitter or junction

box housing.

(1)

Ambient Temperature
Range (°C)

Temperature Class

5.6.2 I1 ATEX Intrinsic Safety

Certificate:

Standards:

Markings:

See Table 5-5 for entity parameters and temperature classifications.

Quick Start Guide 27

[Headmount HART®]: Baseefa12ATEX0101X
[Headmount Fieldbus/PROFIBUS®]: Baseefa03ATEX0499X
[Railmount HART]: BAS00ATEX1033X

EN IEC 60079-0: 2018, EN 60079-11: 2012

[HART]: II 1 G Ex ia IIC T6…T4 Ga
[Fieldbus/PROFIBUS]: II 1 G Ex ia IIC T4 Ga

Quick Start Guide May 2022

Special Conditions for Safe Use (X):

1. The equipment must be installed in an enclosure which affords it a
degree of protection of at least IP20 in accordance with the
requirements of IEC 60529. Non-metallic enclosures must have a
surface resistance of less than 1 GΩ; light alloy or zirconium
enclosures must be protected from impact and friction when
installed in a Zone 0 environment.

2. When fitted with the Transient Protector Assembly, the equipment is
not capable of withstanding the 500 V test as defined in Clause

6.3.13 of EN 60079-11:2012. This must be taken into account during
installation.

5.6.3 N1 ATEX Type n – with enclosure

Certificate:

Standards:

Markings:

BAS00ATEX3145

EN 60079-0: 2012+A11: 2013, EN 60079-15: 2010

II 3 G Ex nA IIC T5 Gc (–40 °C ≤ Ta ≤ +70 °C)

5.6.4 NC ATEX Type n – without enclosure

Certificate:

Standards:

Markings:

Special Conditions for Safe Use (X):

1. The Rosemount 644 Temperature Transmitter must be installed in a

2. When fitted with the Transient Protector Assembly, the equipment is

[Headmount Fieldbus/PROFIBUS®, Railmount HART®]:
Baseefa13ATEX0093X

[Headmount HART]: Baseefa12ATEX0102U

EN IEC 60079-0: 2018, EN 60079-15: 2010

[Headmount Fieldbus/PROFIBUS, Railmount HART]: II 3 G
Ex nA IIC T5 Gc (–40 °C ≤ Ta ≤ +70 °C)

[Headmount HART]: II 3 G Ex nA IIC T6…T5 Gc; T6(–60 °C ≤
Ta ≤ +40 °C); T5(–60 °C ≤ Ta ≤ +85 °C)

suitably certified enclosure such that it is afforded a degree of
protection of at least IP54 in accordance with IEC 60529 and EN
60079-15.

not capable of withstanding the 500 V test as defined in Clause 6.5 of
EN 60079-15: 2010. This must be taken into account during
installation.

28 Rosemount 644

May 2022 Quick Start Guide

5.6.5 ND ATEX Dust

Certificate:

Standards:

Markings:

DEKRA 19ATEX0076 X

EN IEC 60079-0: 2018, EN 60079-31: 201

II 2 D Ex tb IIIC T130 °C Db, (–60 °C ≤ Ta ≤ +80 °C)

Specific Condition of Use (X):

Non-Standard Paint options may cause risk from electrostatic discharge.
Avoid installations that cause electrostatic build-up on painted surfaces, and
only clean the painted surfaces with a damp cloth. If paint is ordered through
a special option code, contact the manufacturer for more information.

Additional Specific Conditions of Use (X) when “XA” designation is
ordered:

The spring loaded adapter style sensors and DIN style sensors must be
installed in a thermowell to maintain Ex tb protection.

Process Temperature
Range at Sensor
Connection (°C)

-60 °C to +80 °C -60 °C to +80 °C T130 °C

(1) Sensor Connection is where the sensor threads into the transmitter or junction

box housing.

(1)

5.7 International

5.7.1 E7 IECEx Flameproof

Ambient Temperature
Range (°C)

Maximum surface
temperature “T”

Certificate:

Standards:

Markings:

IECEx DEK 19.0041X

IEC 60079-0: 2017, IEC 60079-1: 2014

Ex db IIC T6…T1 Gb, T6(–60 °C ≤ Ta ≤ +70 °C), T5…T1(–60 °C ≤
Ta ≤ +80 °C)

See Table 5-1 for process temperatures.

Special Conditions for Safe Use (X):

1. Flameproof joints are not intended for repair.

2. Non-Standard Paint options may cause risk from electrostatic
discharge. Avoid installations that cause electrostatic build-up on
painted surfaces, and only clean the painted surfaces with a damp
cloth. If paint is ordered through a special option code, contact the
manufacturer for more information.

Quick Start Guide 29

Quick Start Guide May 2022

Additional Specific Conditions of Use (X) when “XA” designation is
ordered:

Guard DIN Style sensors against impacts greater than 4J.

Process temperature
range at sensor
connection

-60 °C to +70 °C -60 °C to +70 °C T6

-60 °C to +80 °C -60 °C to +80 °C T5...T1

(1) Sensor Connection is where the sensor threads into the transmitter or junction

(1)

box housing.

(°C)

5.7.2 I7 IECEx Intrinsic Safety

Certificate:

Standards:

Markings:

See Table 5-5 for Entity Parameters and Temperature Classifications.

Special Conditions for Safe Use (X):

1. The equipment must be installed in an enclosure which affords it a

[Headmount HART®]: IECEx BAS 12.0069X
[Headmount Fieldbus/PROFIBUS®, Railmount HART]: IECEx

BAS 07.0053X

IEC 60079-0: 2017, IEC 60079-11: 2011

Ex ia IIC T6…T4 Ga

degree of protection of at least IP20 in accordance with the
requirements of IEC 60529. Non-metallic enclosures must have a
surface resistance of less than 1G Ω; light alloy or zirconium
enclosures must be protected from impact and friction when
installed in a Zone 0 environment.

Ambient temperature
range (°C)

Temperature class

2. When fitted with the Transient Protector Assembly, the equipment is
not capable of withstanding the 500 V test as defined in Clause

6.3.13 of IEC 60079-11:2011. This must be taken into account during
installation.

5.7.3 N7 IECEx Type n – with enclosure

Certificate:

Standards:

Markings:

30 Rosemount 644

IECEx BAS 07.0055

IEC 60079-0: 2011, IEC 60079-15: 2010

Ex nA IIC T5 Gc (–40 °C ≤ Ta ≤ +70 °C)

May 2022 Quick Start Guide

5.7.4 NG IECEx Type n – without enclosure

Certificate:

Standards:

Markings:

Special Conditions for Safe Use (X):

1. The Rosemount 644 Temperature Transmitter must be installed in a
suitably certified enclosure such that it is afforded a degree of
protection of at least IP54 in accordance with IEC 60529 and IEC
60079-15.

2. When fitted with the Transient Protector Assembly, the equipment is
not capable of withstanding the 500 V test. This must be taken into
account during installation.

5.7.5 NK IECEx Dust

Certificate:

Standards:

Markings:

[Headmount Fieldbus/PROFIBUS®, Railmount HART®]: IECEx
BAS 13.0053X

[Headmount HART]: IECEx BAS 12.0070U

IEC 60079-0: 2017, IEC 60079-15: 2010

[Headmount Fieldbus/PROFIBUS, Railmount HART]: Ex nA IIC
T5 Gc (–40 °C ≤ Ta ≤ +70 °C)

[Headmount HART]: Ex nA IIC T6…T5 Gc; T6(–60 °C ≤ Ta ≤ +40
°C); T5(–60 °C ≤ Ta ≤ +85 °C)

IECEx DEK 19.0041X

IEC 60079-0: 2017, IEC 60079-31: 2013

Ex tb IIIC T130 °C Db, (–60 °C ≤ Ta ≤ +80 °C)

Specific Condition of Use (X):

Non-Standard Paint options may cause risk from electrostatic discharge.
Avoid installations that cause electrostatic build-up on painted surfaces, and
only clean the painted surfaces with a damp cloth. If paint is ordered through
a special option code, contact the manufacturer for more information.

Additional Specific Conditions of Use (X) when “XA” designation is
ordered:

The spring loaded adapter style sensors and DIN style sensors must be
installed in a thermowell to maintain Ex tb protection.

Quick Start Guide 31

Quick Start Guide May 2022

Process temperature
range at sensor
connection

-60 °C to +80 °C -60 °C to +80 °C T130 °C

(1) Sensor Connection is where the sensor threads into the transmitter or junction

(1)

box housing.

(°C)

Ambient temperature
range (°C)

5.8 Brazil

5.8.1 E2 Brazil Flameproof and Dust

Certificate:

Standards:

Markings:

Special Conditions for Safe Use (X):

1. See product description for ambient temperature limits and process

2. The non-metallic label may store an electrostatic charge and become

UL-BR 13.0535X

ABNT NBR IEC 60079-0:2013, ABNT NBR IEC 60079-1:2016,
ABNT NBR IEC 60079-31:2014

Ex db IIC T6…T1 Gb; T6…T1: (–50 °C ≤ Ta ≤ +40 °C), T5…T1: (–
50 °C ≤ Ta ≤ +60 °C)

Ex tb IIIC T130 °C; IP66; (–40 °C ≤ Ta ≤ +70 °C)

temperature limits.

a source of ignition in Group III environments.

Maximum surface
temperature “T”

3. Guard the LCD display cover against impact energies greater than 4
joules.

4. Consult the manufacturer if dimensional information on the
flameproof joints is necessary.

5.8.2 I2 Brazil Intrinsic Safety

Certificate:

Standards:

Markings:

See Table 5-5 for Entity Parameters and Temperature Classifications.

Special Conditions for Safe Use (X):

1. The apparatus must be installed in an enclosure which affords it a

32 Rosemount 644

[Fieldbus]: UL-BR 15.0264X [HART®]: UL-BR 14.0670X

ABNT NBR IEC 60079-0:2013, ABNT NBR IEC 60079-11:2013

[Fieldbus]: Ex ia IIC T* Ga (–60 °C ≤ Ta ≤ +** °C) [HART]: Ex ia
IIC T* Ga (–60 °C ≤ Ta ≤ +** °C)

degree of protection of at least IP20.

May 2022 Quick Start Guide

2. Non-metallic enclosures must have a surface resistance of less than 1
GΩ; light alloy or zirconium enclosures must be protected from
impact and friction when installed in a zone 0 environment.

3. When fitted with the Transient Protector Assembly, the equipment is
not capable of withstanding the 500 V test as defined on ABNT NBR
IEC 60079-11. This must be taken into account during installation.

5.9 China

5.9.1 E3 China Flameproof

Certificate:

Standards:

GYJ21.1118X

GB3836.1-2010, GB3836.2-2010, GB12476.1-2013,
GB12476.5-2013

Markings:

Ex d IIC T6…T1; Ex tD A21 T130 °C; IP66

产品安全使用特定条件

产品防爆合格证后缀“X”代表产品安全使用有特定条件：

1. 涉及隔爆接合面的维修须联系产品制造商。

2. 产品铭牌材质为非金属，使用时须防止产生静电火花，只能用湿布

清理。

产品使用注意事项

1. 产品使用环境温度与温度组别的关系为：

防爆标志

Ex d IIC T6~T1GbT6 –60 °C ≤ Ta ≤ +70 °C

Ex tD A21 IP66
T130 °C

温度组别 环境温度

T5～T1 –60 °C ≤ Ta ≤ +80 °C

T130 °C –60 °C ≤ Ta ≤ +80 °C

2. 产品外壳设有接地端子，用户在安装使用时应可靠接地。

3. 现场安装时，电缆引入口须选用国家指定的防爆检验机构按检验认

可、具有 Ex dⅡC, Ex tD A21 IP66 防爆等级的电缆引入装置或堵封
件，冗余电缆引入口须用堵封件有效密封。

4. 用于爆炸性气体环境中，现场安装、使用和维护必须严格遵守“断电
后开盖！”的警告语。用于爆炸性粉尘环境中，现场安装、使用、和
维护必须严格遵守“爆炸性粉尘场所严禁开盖！”的警告语。

5. 用于爆炸性粉尘环境中，产品外壳表面须保持清洁，以防粉尘堆
积，单严禁用压缩空气吹扫。

Quick Start Guide 33

Quick Start Guide May 2022

6. 产品的安装、使用和维护应同时遵守产品使用说明书、
GB3836.13-2013“爆炸性环境 第 13 部分：设备的修理、检修、修

复和改造”、GB3836.15-2000“爆炸性气体环境用电气设备 第 15 部
分：危险场所电气安装（煤矿除外）”、GB3836.16-2006“爆炸性气
体环境用电气设备 第 16 部分：电气装置的检查和维护（煤矿除
外）”和 GB50257-2014“电气装置安装工程爆炸和火灾危险环境电
力装置施工及验收规范”和 GB15577-2007“粉尘防爆安全规程”、
GB12476.2-2010“可燃性粉尘环境用电气设备 第 2 部分 选型和安
装”的有关规定。

5.9.2 I3 China Intrinsic Safety

Certificate:

Standards:

Markings:

GYJ21.1119X

GB3836.1-2010, GB3836.4-2010, GB3836.20-2010

Ex ia IIC T4~T6 Ga

产品安全使用特殊条件

防爆合格证号后缀“X”代表产品安全使用有特定条件：

1. 温度变送器须安装于外壳防护等级不低于国家标准 GB/T4208-2017
规定的 IP20 的壳体中，方可用于爆炸性危险场所，金属壳体须符合
国家标准 GB3836.1-2010 第 8 条的规定，非金属壳体须符合

GB3836.1-2010 第 7.4 条的规定。

2. 非金属外壳表面电阻必须小于 1GΩ，轻金属或者锆外壳在安装时必

须防止冲击和摩擦。

3. 当 Transmitter Type 为 F、D 时，产品外壳含有轻金属，用于 0 区
时需注意防止由于冲击或摩擦产生的点燃危险。

4. 产品选用瞬态保护端子板（选项代码为 T1）时，此设备不能承受
GB3836.4-2010 标准中第 6.3.12 条规定的 500V 交流有效值试验电

压的介电强度试验。

产品使用注意事项

1. 产品环境温度为：
当 Options 不选择 Enhanced Performance 时

输出代码

最大输出功率（W） 温度组别环境温度

A 0.67 T6 –60 °C ≤ Ta ≤ +40 °C

0.67 T5 –60 °C ≤ Ta ≤ +50 °C

1 T5 –60 °C ≤ Ta ≤ +40 °C

1 T4 –60 °C ≤ Ta ≤ +80 °C

F 或 W 1.3 T4 –50 °C ≤ Ta ≤ +60 °C

34 Rosemount 644

May 2022 Quick Start Guide

输出代码 最大输出功率（W） 温度组别环境温度

5.32 T4 –50 °C ≤ Ta ≤ +60 °C

当 Options 选择 Enhanced Performance 时

最大输出功率（W） 温度组别 环境温度

0.67 T6 –60 °C ≤ Ta ≤ +40 °C

0.67 T5 –60 °C ≤ Ta ≤ +50 °C

0.80 T5 –60 °C ≤ Ta ≤ +40 °C

0.80 T4 –60 °C ≤ Ta ≤ +80 °C

2. 参数：

当 Options 不选择 Enhanced Performance 时
输入端(+ , -)

输出代码 最高输

入电压

Ui（V）

A 30 200 0.67/1 10 0

F 或 W 30 300 1.3 2.1 0

F 或 W(FISCO) 17.5 380 5.32 2.1 0

最大输
入电流

I

i (mA)

最大输
入功率

Pi（W）

最大内部等效参数

Ci (nF) Li (mH)

传感器端（1,2,3,4）

输出代码

A 13.6 80 0.08 75 0

F,W 13.9 23 0.079 7.7 0

最高输
出电压

Uo (V)

最大输
出电流

Io (mA)

最大输
出功率

Po (W)

最大内部等效参数

Co (nF) Lo (mH)

当 Options 选择 Enhanced Performance 时
输入端(+ , -)

最高输入电压

Ui (V)

30 150 (Ta ≤ +80 °C) 0.67/0.8 3.3 0

最大输入电流

Ii (mA)

170 (Ta ≤ +70 °C)

最大输入功
率

Pi (W)

最大内部等效参数

Ci (nF) Li (mH)

Quick Start Guide 35

Quick Start Guide May 2022

最高输入电压

Ui (V)

最大输入电流

Ii (mA)

190 (Ta ≤ +60 °C)

最大输入功
率

Pi (W)

最大内部等效参数

Ci (nF) Li (mH)

传感器端（1,2,3,4）

最高输 出
电压

Uo (V)

13.6 80 0.08 IIC 0.816 5.79

最大输 出
电流

Io (mA)

最大输 出
功率

Po (W)

组别 最大内部等效参数

Co (nF) Lo (mH)

IIB 5.196 23.4

IIA 18.596 48.06

注：本案电气参数符合 GB3836.19-2010 对 FISCO 现场仪表的参数
要求。

3. 该产品必须与已通过防爆认证的关联设备配套共同组成本安防爆系
统方可使用于爆炸性气体环境。其系统接线必须同时遵守本产品和
所配关联设备的使用说明书要求，接线端子不得接错。

4. 用户不得自行更换该产品的零部件，应会同产品制造商共同解决运
行中出现的故障，以杜绝损坏现象的发生。

5. 产品的安装、使用和维护应同时遵守产品使用说明书、
GB3836.13-2013“爆炸性环境 第 13 部分：设备的修理、检修、修

复和改造”、GB/T3836.15-2017“爆炸性环境 第 15 部分：电气装置
的设计，选型和安装”、GB/T3836.16-2017“爆炸性环境 第 16 部
分：电气装置的检查和维护”、GB/T3836.18-2017“爆炸性环境 第
18 部分：本质安全电气系统”和 GB50257-2014“电气装置安装工程
爆炸和火灾危险环境电力装置施工及验收规范”的有关规定。

5.9.3 N3 China Type n

Certificate:

Standards:

Markings:

产品安全使用特殊条件

1. 产品温度组别和使用环境温度范围之间的关系为：
当 Options 不选择 Enhanced Performance 时：

温度组别

T5 –40 °C ≤ Ta ≤ +70 °C

36 Rosemount 644

GYJ20.1544

GB3836.1-2010, GB3836.8-2014

Ex nA IIC T5/T6 Gc

环境温度

May 2022 Quick Start Guide

当 Options 选择 Enhanced Performance 时：

温度组别 环境温度

T6 –60 °C ≤ Ta ≤ +40 °C

T5 –60 °C ≤ Ta ≤ +85 °C

2. 最高工作电压：45Vdc

3. 现场安装时，电缆引入口须选用经国家指定的防爆检验机构检验认

可、具有 Ex e IIC Gb 防爆等级的电缆引入装置或堵封件，冗余电缆
引入口须用封堵件有效密封。电缆引入装置或封堵件的安装使用必
须遵守其使用说明书的要求并保证外壳防护等级达到 IP54（符合

GB/T4208-2017 标准要求）以上。

4. 用户不得自行更换该产品的零部件，应会同产品制造商共同解决运

行中出现的故障，以杜绝损坏现象的发生。

5. 产品的安装、使用和维护应同时遵守产品使用说明书、
GB3836.13-2013“爆炸性环境 第 13 部分：设备的修理、检修、修

复和改造”、GB/T3836.15-2017“爆炸性环境 第 15 部分：电气装置
的设计、选型和安装”、GB/T3836.16-2017“爆炸性环境 第 16 部
分：电气装置的检查和维护”和 GB50257-2014“电气装置安装工程
爆炸和火灾危险环境电力装置施工及验收规范”的有关规定。

5.10 EAC - Belarus, Kazakhstan, Russia

5.10.1 EM Technical Regulation Customs Union TR CU 012/2011 (EAC) Flameproof

Standards:

Markings:

See Table 5-1 for process temperatures.

Special Conditions for Safe Use (X):

1. See certificate TR CU 012/2011 for ambient temperature range.

2. Guard the LCD display cover against impact energies greater than 4

3. Flameproof joints are not intended for repair.

4. Non-standard paint options may cause risk from electrostatic

Quick Start Guide 37

GOST 31610.0-2014, GOST IEC 60079-1-2011

1Ex d IIC T6…T1 Gb X, T6 (-55 °C ≤ Ta ≤ +40 °C), T5…T1(-55 °C
≤ Ta≤ +60 °C);

joules.

discharge. Avoid installations that cause electrostatic build-up on
painted surfaces, and only clean the painted surfaces with a damp
cloth. If paint is ordered through a special code, contact the
manufacturer for more information.

Quick Start Guide May 2022

5.10.2 IM Technical Regulation Customs Union TR CU 012/2011 (EAC) Intrinsic Safety

Standards:

Markings:

GOST 31610.0-2014, GOST 31610.11-2014

[HART®]: 0Ex ia IIC T6…T4 Ga X; [Fieldbus, FISCO, PROFIBUS
PA]: 0Ex ia IIC T4 Ga X

See Table 5-5 for Entity Parameters and Temperature Classifications.

Special Conditions for Safe Use (X):

1. The equipment must be installed in an enclosure which affords it a
degree of protection of at least IP20 in accordance with the
requirements of GOST 14254-96. Non-metallic enclosures must have
a surface resistance of less than 1 Ω; light alloy or zirconium
enclosures must be protected from impact and friction when
installed in a Zone 0 environment.

2. When fitted with the Transient Protector Assembly, the equipment is
not capable of withstanding the 500 V test as defined in GOST

31610.11-2014. This must be taken into account during installation.

3. See certificate TR CU 012/2011 for ambient temperature range.

5.10.3 KM Technical Regulation Customs Union TR CU 012/2011 (EAC) Flameproof, Intrinsic Safety, and Dust Ignition-proof

Standards:

Markings:

GOST 31610.0-2014, GOST IEC 60079-1-2011, GOST

31610.11-2014, GOST R IEC 60079-31-2010

Ex tb IIIC T130 °C Db X (-55 °C ≤ Ta ≤ +70 °C); IP66

®

See Table 5-1 for process temperatures.

See EM for Flameproof Markings and see IM for Intrinsic Safety Markings.

Special Conditions for Safe Use (X):

1. The non-metallic label may store an electrostatic charge and become
a source of ignition in Group III environments. Label must be cleaned
by the damp cloth with antistatic to avoid store an electrostatic
discharge.

2. Guard the LCD display cover against impact energies greater than 4
joules.

See EM for Flameproof Specific Conditions of Use and see IM for Intrinsic
Safety Specific Conditions of Use.

38 Rosemount 644

May 2022 Quick Start Guide

5.11 Japan

5.11.1 E4 Japan Flameproof

Certificate:

Markings:

Special Conditions for Safe Use:

1. Flameproof joints are not intended for repair.

2. Models with LCD display cover shall have the display cover protected

3. For Models 65 and 185, the user shall ensure the external surface

4. Non-standard paint options may cause risk from electrostatic

5. The wiring used shall be suitable for temperatures over 80 °C.

CML 17JPN1316X

Ex db IIC T6...T1 Gb; T6 (-50 °C < Ta < +40 °C); T5…T1(-50 °C ≤
Ta ≤ 60 °C)

from impact energies greater than 4 joules.

temperature of the equipment and the neck of the DIN Style probe
does not exceed 130 °C.

discharge.

5.11.2 I4 Japan Intrinsic Safety

Certificate:

Standards:

Markings:

Special Conditions for Safe Use (X):

1. The apparatus must be installed in an enclosure which affords it a
degree of protection of at least IP20.

CML 18JPN2118X

JNIOSH-TR-46-1, JNIOSH-TR-46-6

[Fieldbus] Ex ia IIC T4 Ga (–60 °C ≤ Ta ≤ +60 °C);

2. Non-metallic enclosures must have a surface resistance of less than 1
G Ω; light alloy or zirconium enclosures must be protected from
impact and friction when installed in a zone 0 environment.

5.12

Korea

5.12.1 EP Korea Flameproof and Dust-Ignitionproof

Certificate:

Markings:

Quick Start Guide 39

13-KB4BO-0559X

Ex db IIC T6…T1 Gb; Ex tb IIIC T130 °C Db

Quick Start Guide May 2022

Special Condition for Safe Use (X):

See certificate for special conditions for safe use.

5.12.2 IP Korea Intrnsic Safety

Certificate:

Markings:

Special Condition for Safe Use (X):

See certificate for special conditions for safe use.

13-KB4BO-0531X

Ex ia IIC T6…T4 Ga

5.13 Combinations

K1

K2

K5

K7

KA

KB

KC

KD

KP

Combination of E1, I1, N1, and ND

Combination of E2 and I2

Combination of E5 and I5

Combination of E7, I7, N7, and NK

Combination of K6, E1, and I1

Combination of K5 and K6

Combination of I5 and I6

Combination of E5, I5, K6, E1, and I1

Combination of EP and IP

5.14 Additional certifications

5.14.1 SBS American Bureau of Shipping (ABS) Type Approval

Certificate:

21-2157984-PDA

5.14.2 SBV Bureau Veritas (BV) Type Approval

Certificate:

Requirements:

Application:

26325 BV

Bureau Veritas Rules for the Classification of Steel Ships

Class notations: AUT-UMS, AUT-CCS, AUT-PORT and AUT­IMS

5.14.3 SDN Det Norske Veritas (DNV) Type Approval

Certificate:

40 Rosemount 644

TAA00000K8

May 2022 Quick Start Guide

Application:

Location Classes:Temperature: D; Humidity: B; Vibration: A;
EMC: B; Enclosure B/IP66: A, C/IP66: SST

5.14.4 SLL Lloyds Register (LR) Type Approval

Certificate:

Application:

LR21173788TA

For use in environmental categories ENV1, ENV2, ENV3, and
ENV5.

5.15 Specification tables

Table 5-1: Process Temperature Limits

Sensor only
(no
transmitter
installed)

Any
extension
length

Table 5-2: Process Temperature Limits without LCD Display Cover

Transmitter Process temperature [°C]

No extension 131 °F

3-in.
extension

6-in.
extension

9-in.
extension

Process temperature [°C]

Gas Dust

T6 T5 T4 T3 T2 T1 T130 °C

85 °C
(185 °F )

Gas Dust

T6 T5 T4 T3 T2 T1 T130 °C

(55 °C)

131 °F
(55 °C)

140 °F
(60 °C)

149 °F
(65 °C)

100 °C
(212 °F)

158 °F
(70 °C)

158 °F
(70 °C)

158 °F
(70 °C)

167 °F
(75 °C)

135 °C
(275 °F)

212 °F
(100 °C)

230 °F
(110 °C)

248 °F
(120 °C)

266 °F
(130 °C)

200 °C
(392 °F)

338 °F
(170 °C)

374 °F
(190 °C)

392 °F
(200 °C)

392 °F
(200 °C)

300 °C
(572 °F)

536 °F
(280 °C)

572 °F
(300 °C)

572 °F
(300 °C)

572 °F
(300 °C)

450 °C
(842 °F)

824 °F
(440 °C)

842 °F
(450 °C)

842 °F
(450 °C)

842 °F
(450 °C)

130 °C
(266 °F)

212 °F
(100 °C)

230 °F
(110 °C)

230 °F
(110 °C)

248 °F
(120 °C)

Adhering to the process temperature limitation of Table 5-3 will ensure that
the service temperature limitations of the LCD cover are not exceeded.
Process temperatures may exceed the limits defined in Table 5-3 if the
Temperature of the LCD cover is verified to not exceed the service
temperatures in Table 5-4 and the process temperatures do not exceed the
values specified in Table 5-2.

Quick Start Guide 41

Quick Start Guide May 2022

Table 5-3: Process Temperature Limits with LCD Display Cover

Transmitter
with LCD
display cover

Process temperature [°C]

Gas Dust

T6 T5 T4...T1 T130 °C

No extension 131 °F (55 °C) 158 °F (70 °C) 203 °F (95 °C) 203 °F (95 °C)

3-in. extension 131 °F (55 °C) 158 °F (70 °C) 212 °F (100 °C) 212 °F (100 °C)

6-in. extension 140 °F (60 °C) 158 °F (70 °C) 212 °F (100 °C) 212 °F (100 °C)

9-in. extension 149 °F (65 °C) 167 °F (75 °C ) 230 °F (110 °C) 230 °F (110 °C)

Table 5-4: Service Temperature Limits

Transmitter
with LCD
display cover

No extension 149 °F (65 °C) 167 °F (75 °C) 203 °F (95 °C) 203 °F (95 °C)

Service temperature [°C]

Gas Dust

T6 T5 T4...T1 T130 °C

Table 5-5: Entity Parameters

Fieldbus/PROFIBUS

®

[FISCO]

Ui (V) 30 [17.5] 30 30

Ii (mA) 300 [380] 200 150 for Ta ≤ 80 °C

Pi (W) 1.3 at T4 (–50 °C ≤ Ta ≤

+60 °C)
[5.32 at T4 (–50 °C ≤

Ta ≤ +60 °C)]

Ci (nF) 2.1 10 3.3

Li (mH) 0 0 0

®

HART

.67 at T6(–60 °C ≤ Ta ≤
+40 °C)

.67 at T5(–60 °C ≤ Ta ≤
+50 °C)

1.0 at T5(–60 °C ≤ Ta ≤
+40 °C)

1.0 at T4(–60 °C ≤ Ta ≤
+80 °C)

HART (Enhanced)

170 for Ta ≤70 °C
190 for Ta ≤60 °C

.67 at T6(–60 °C ≤ Ta ≤
+40 °C)

.67 at T5(–60 °C ≤ Ta ≤
+50 °C)

.80 at T5(–60 °C ≤ Ta ≤
+40 °C)

.80 at T4(–60 °C ≤ Ta ≤
+80 °C)

42 Rosemount 644

May 2022 Quick Start Guide

6 Declaration of Conformity

Quick Start Guide 43

Quick Start Guide May 2022

44 Rosemount 644

May 2022 Quick Start Guide

Quick Start Guide 45

Quick Start Guide May 2022

46 Rosemount 644

May 2022 Quick Start Guide

7 China RoHS

Quick Start Guide 47

*00825-0200-4728*

00825-0200-4728, Rev. LB

Quick Start Guide

May 2022

For more information:

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