Emerson Rosemount 644 User manual

Quick Start Guide
00825-0200-4728, Rev GA
April 2017
Note
Before installing the transmitter, confirm the correct device driver is loaded on the host
systems. See page 3 for System Readiness.
Rosemount™644 Temperature
Transmitter
with 4–20 mA HART®(Revision 5 and 7) Protocol

April 2017
2
Quick Start Guide
NOTICE
This guide provides basic guidelines for Rosemount 644 Transmitters. It does not provide instructions for
configuration, diagnostics, maintenance, service, troubleshooting, explosion-proof, flameproof, or intrinsically
safe (I.S.) installations. Refer to the Rosemount 644 Reference Manual for more instruction. The manual and
this guide is also available electronically on Emerson.com/Rosemount.
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 the Rosemount
644 Reference Manual for any restrictions associated with a safe installation.
Before connecting a HART-based 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.
Electrical shock can result in death or serious injury.
Avoid contact with the leads and the terminals. High voltage may be present on leads can cause electrical
shock.
Conduit/cable entries
Unless marked, the conduit/cable entries in the transmitter housing use a 1/2–14 NPT thread form. Entries
marked “M20” are M20 x 1.5 thread form. On devices with multiple conduit entries, all entries will have the
same thread form. Only use plugs, adapters, glands, or conduit with a compatible thread form when closing
these entries.
When installing in a Hazardous Location, use only appropriately listed or Ex certified plugs, adapters, or
glands in cable/conduit entries.
Contents
System readiness . . . . . . . . . . . . . . . . . . . . . . . . . 3
Transmitter installation . . . . . . . . . . . . . . . . . . . 3
Safety instrumented systems . . . . . . . . . . . . . 17
Product Certifications . . . . . . . . . . . . . . . . . . . . 18

Quick Start Guide
3
April 2017
1.0 System readiness
1.1 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. This
transmitter can be configured for either HART Revision 5 or 7.
For instructions on how to change the HART Revision of your transmitter, see
“Verify configuration” on page 4.
1.2 Confirm correct device driver
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
Rosemount 644 Transmitter device revisions and files
Table 1 provides the information necessary to ensure the correct Device Driver
files and documentation are being used.
2.0 Transmitter installation
2.1 Set the alarm switch
Set the Rosemount 644 Transmitter alarm switch before putting the device into
operation.
Without an LCD display:
1. Set the loop to manual (if applicable) and disconnect the power.
2. Remove the housing cover.
3. Set the switch to the desired position (Hindicates High, Lindicates Low),
then reattach the housing cover. Enclosure covers must be fully engaged to
meet explosion-proof requirements.
Table 1. Rosemount 644 Device Revisions and Files
Software
date
NAMUR
software
revision
HART
software
revision
HART
universal
revision(1)
1. NAMUR software revision is located on the hardware tag of the device. HART software revision can be read using
a HART communication tool.
Device
revision(2)
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, the
new Device Driver must be downloaded. It is recommended to download new Device Driver files to ensure full
functionality.
Manual document
number
Changes to
software (3)
3. HART Revision 5 and 7 Selectable, Dual Sensor support, Safety Certified, Advanced Diagnostics (if ordered),
Enhanced Accuracy and Stability (if ordered).
June 2012 1.1.1 3
5 8
00809-0100-4728 See Footnote 3 for
list of changes.
7 9

April 2017
4
Quick Start Guide
4. Apply power and set the loop to automatic control.
Figure 1. 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. Enclosure covers must be fully engaged to meet explosion-proof requirements.
2.2 Verify configuration
Verify the configuration of the Rosemount 644 Transmitter device upon
receiving your transmitter using any HART-compliant configuration tool. See
the Rosemount 644 Reference Manual for configuration instructions using AMS
Device Manager.
The Rosemount 644 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
Rosemount 644 Reference Manual and Field Communicator Reference Manual
for more information.
Verify configuration with a Field Communicator
A Rosemount 644 DD (Device Descriptor) must be installed on the Field
Communicator to verify the configuration. Fast Key sequences for the latest DD
are shown in Table 2 on page 5. For Fast Key sequences using legacy DD's,
contact your local Emerson™representative.
Perform the following steps to determine if an upgrade is required.
1. Connect the sensor (see the wiring diagram located on the device’s top
label).
Rosemount 644 Transmitter Rosemount 644 Field Mount
A

Quick Start Guide
5
April 2017
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.
4. 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.
Field Communicator user interface
Two user interfaces are available to configure this device.
The Device Revision 8 and 9 (HART 5 and 7), DD Revision 1 Fast Key Sequence in
Table 2 may be used for transmitter configuration and startup.
Figure 2. Device Dashboard Field Communicator Interface
Table 2. 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

April 2017
6
Quick Start Guide
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™2, 2, 4, 1, 3 2, 2, 4, 1, 3
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
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
Table 2. Device Revision 8 and 9 (HART 5 and 7), DD Revision 1 Fast Key Sequence
Function HART 5 HART 7

Quick Start Guide
7
April 2017
Input or verify Callendar Van-Dusen constants
If sensor matching is being used with this combination of a transmitter and
sensor, verify the constants input.
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 SensorMatching-CVD.
8. Choose the appropriate sensor type from the ENTER SENSOR TYPE prompt.
Verifying configuration with Local Operator Interface (LOI)
The optional LOI can be used for commissioning the device. The LOI is a
2-button design. To activate the LOI, push any button. LOI button functionality
is shown on the bottom corners of the display. See Table 3 and Figure 4 for
button operation and menu information.
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
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
Table 2. Device Revision 8 and 9 (HART 5 and 7), DD Revision 1 Fast Key Sequence
Function HART 5 HART 7

April 2017
8
Quick Start Guide
Figure 3. Local Operator Interface
Figure 4. LOI Menu
Switch HART Revision mode
Not all systems are capable of communicating with HART Revision 7 Protocol.
This transmitter can be configured for either HART Revision 5 or 7 using a HART
capable configuration tool.
Table 3. LOI Button Operation
Button
Left No SCROLL
Right Yes ENTER

Quick Start Guide
9
April 2017
Updated configuration menus include a HART Universal Revision parameter that
can be configured to 5 or 7 if accessible by your system. See Table 2 for the Fast
Key sequence.
If the HART configuration tool is not capable of communicating with HART
Revision 7, the configuration menus in Table 2 will not be available. To switch
the HART Universal Revision parameter from generic mode, follow the
instructions below.
1. 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 2 on page 5 to change HART Revision when the correct Device Driver is loaded.
2.3 Mount the transmitter
Mount the transmitter at a high point in the conduit run to prevent moisture
from draining into the transmitter housing.
Head mount transmitter with DIN plate style sensor installation
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 (see “Wire and apply power” on page 12).
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.

April 2017
10
Quick Start Guide
11. Install and tighten the connection head cover. Enclosure covers must be
fully engaged to meet explosion-proof requirements.
Head mount transmitter with threaded sensor installation (two
or three conduit entries)
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. To verify the correct installation of Integral Transient Protection (option
code T1) on the Rosemount 644 Transmitter, confirm the following steps
have been completed:
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.
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.
A. Connection head cover
B. Connection head
C. Thermowell
D. Transmitter mounting screws
E. Integral mount sensor with flying leads
F. Extension
AB C
DEF

Quick Start Guide
11
April 2017
13. Install and tighten the universal head cover. Enclosure covers must be fully
engaged to meet explosion-proof requirements.
Field mount transmitter with threaded sensor installation
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. Enclosure covers must
be fully engaged to meet explosion-proof requirements.
A. Threaded thermowell
B. Threaded style sensor
C. Standard extension
D. Universal head (transmitter inside)
E. Conduit entry
A. Threaded thermowell
B. Threaded style sensor
C. Standard extension
D. Field mount housing (transmitter inside)
E. Conduit entry
A
C
BD
E
A
C
B
D
E

April 2017
12
Quick Start Guide
2.4 Wire and apply power
Wire the sensor to the transmitter
The wiring diagram is located on the device’s top label below the terminal
screws.
Figure 5. Rosemount 644 Head Mount Transmitter
Figure 6. Rosemount 644 Head Mount - Single and Dual Input Wiring Diagrams
* The transmitter must be configured for at least a 3-wire RTD in order to recognize an RTD with a
compensation loop.
** Emerson provides a 4-wire sensors for all single element RTDs. Use these RTDs in 3-wire
configurations by leaving the unneeded leads disconnected and insulated with electrical tape.

Quick Start Guide
13
April 2017
Figure 7. Rosemount 644 Field Mount Transmitter
Figure 8. Rosemount 644 Field Mount - Single and Dual Input Wiring Diagrams
Power the transmitter
An external power supply is required to operate the transmitter.
1. Remove the housing cover (if applicable).
2. Connect the positive power lead to the “+” terminal. Connect the negative
power lead to the “–” terminal.
- 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). Enclosure covers must be fully
engaged to meet explosion-proof requirements.
5. Apply power (12–42 Vdc).

April 2017
14
Quick Start Guide
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.
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).
Option 1
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.
Option 2
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.
A. Sensor wires
B. Transmitter
C. Shield ground point
D. 4–20 mA loop
A
B
C
DCS
D

Quick Start Guide
15
April 2017
4. Ensure the sensor shield is electrically isolated from the surrounding
grounded fixtures.
5. Connect shields together, electrically isolated from the transmitter.
Option 3
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 signal wiring shield at the power supply end.
Grounded thermocouple inputs
Option 1
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.
A. Sensor wires
B. Transmitter
C. Shield ground point
D. 4–20 mA loop
A. Sensor wires
B. Transmitter
C. Shield ground point
D. 4–20 mA loop
A
B
C
D
DCS
DCS
A
B
C
D

April 2017
16
Quick Start Guide
4. Ground signal wiring shield at the power supply end.
2.5 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.
Performing a loop test using a Field Communicator
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.
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. 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.
Performing a loop test using Device Manager
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.
A. Sensor wires
B. Transmitter
C. Shield ground point
D. 4–20 mA loop
Device dashboard Fast Keys 3, 5, 1
DCS
A
B
C
D

Quick Start Guide
17
April 2017
Performing a loop test using the Local Operator Interface
Reference the figure below to find the path to the Loop Test in the LOI menu.
Figure 9. Configuring the Tag with LOI
3.0 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.

April 2017
18
Quick Start Guide
4.0 Product Certifications
Rev 1.17
4.1 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.
4.2 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).
4.3 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.
USA
E5 USA Explosionproof, Non-Incendive, Dust-Ignitionproof
Certificate: [XP & DIP]: 3006278; [NI]: 3008880 & 3044581
Standards: FM Class 3600: 2011, FM Class 3615: 2006, FM Class 3616: 2011, FM Class
3810: 2005, NEMA®-250: 250: 2003, ANSI/IEC 60529: 2004
Markings: XP CL I, DIV 1, GP B, C, D; DIP CL II/III, GP E, F, G; (–50 °C ≤Ta≤+85 °C); Type
4X; See I5 description for Non-Incendive markings.
I5 USA Intrinsic Safety and Non-Incendive
Certificate: 3008880 [Headmount Fieldbus/PROFIBUS®, Railmount HART®]
Standards: FM Class 3600: 2011, FM Class 3610: 2010, FM Class 3611: 2004, FM Class
3810: 2005, NEMA – 250: 1991
Markings: IS CL I/II/III, DIV I, GP A, B, C, D, E, F, G; NI CL I, DIV 2, GP A, B, C, D
Special Conditions for Safe Use (X):
1. When no enclosure option is selected, the Rosemount™644 Transmitter shall be
installed in an enclosure meeting the requirements of ANSI/ISA S82.01 and S82.03 or
other applicable ordinary location standards.
2. Option code K5 is only applicable with Rosemount J5 Universal Head (M20 ⫻1.5) or
Rosemount J6 Universal Head (1/2–14 NPT) enclosure.
3. An enclosure option must be selected to maintain a Type 4X rating.
Certificate: 3044581 [Headmount HART]
Standards: FM Class 3600: 2011, FM Class 3610: 2010, FM Class 3611: 2004, FM Class
3810: 2005, ANSI/NEMA – 250: 1991, ANSI/IEC 60529: 2004; ANSI/ISA
60079-0: 2009; ANSI/ISA 60079-11: 2009
Markings: [No Enclosure]: IS CL I, DIV I, GP A, B, C, D T4; CL I ZONE 0 AEx ia IIC T4 Ga; NI
CL I, DIV 2, GP A, B, C, D T5
[With Enclosure]: IS CL I/II/III, DIV 1, GP A, B, C, D, E, F, G; NI CL I, DIV 2, GP A,
B, C, D

Quick Start Guide
19
April 2017
Special Conditions for Safe Use (X):
1. When no enclosure option is selected, the Rosemount 644 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. 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.
Canada
I6 Canada Intrinsic Safety and Division 2
Certificate: 1091070
Standards: 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
Markings: [HART] IS CL I GP A, B, C, D T4/T6; CL I, ZONE 0 IIC; 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
K6 Canada Explosionproof, Dust-Ignitionproof, Intrinsic Safety and Division 2
Certificate: 1091070
Standards: 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
Markings: CL I/II/III, DIV 1, GP B, C, D, E, F, G
See I6 description for Intrinsic Safety and Division 2 markings.
Europe
E1 ATEX Flameproof
Certificate: FM12ATEX0065X
Standards: EN 60079-0: 2012, EN 60079-1: 2007, EN 60529:1991 +A1:2000
Markings: II 2 G Ex d IIC T6…T1 Gb, T6(–50 °C ≤Ta≤+40 °C), T5…T1(–50 °C ≤Ta≤
+60 °C); See Table 4 for process temperatures.
Special Conditions for Safe Use (X):
1. See certificate for ambient temperature range.
2. The non-metallic label may store an electrostatic charge and become a source of
ignition in Group III environments.
3. Guard the LCD display cover against impact energies greater than 4 joules.
4. Flameproof joints are not intended for repair.
5. A suitable certified Ex d or Ex tb enclosure is required to be connected to temperature
probes with Enclosure option “N”.
6. Care shall be taken by the end user to ensure that the external surface temperature on
the equipment and the neck of DIN Style Sensor probe does not exceed 130 °C.
7. 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.

April 2017
20
Quick Start Guide
I1 ATEX Intrinsic Safety
Certificate: [Headmount HART]: Baseefa12ATEX0101X
[Headmount Fieldbus/PROFIBUS]: Baseefa03ATEX0499X
[Railmount HART]: BAS00ATEX1033X
Standards: EN 60079-0: 2012, EN 60079-11: 2012
Markings: [HART]: II 1 G Ex ia IIC T6…T4 Ga;
[Fieldbus/PROFIBUS]: II 1 G Ex ia IIC T4 Ga
See Table 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 IEC 60529.
Non-metallic enclosures must have a surface resistance of less than 1GΩ; 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.
N1 ATEX Type n – with enclosure
Certificate: BAS00ATEX3145
Standards: EN 60079-0: 2012, EN 60079-15: 2010
Markings: II 3 G Ex nA IIC T5 Gc (–40 °C ≤Ta≤+70 °C)
NC ATEX Type n – without enclosure
Certificate: [Headmount Fieldbus/PROFIBUS, Railmount HART]: Baseefa13ATEX0093X
[Headmount HART]: Baseefa12ATEX0102U
Standards: EN 60079-0: 2012, EN 60079-15: 2010
Markings: [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)
Special Conditions for Safe Use (X):
1. The Rosemount 644 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 EN 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.
ND ATEX Dust
Certificate: FM12ATEX0065X
Standards: EN 60079-0: 2012+A1:2013, EN 60079-31: 2014, EN 60529:1991 +A1:2000
Markings: II 2 D Ex tb IIIC T130 °C Db, (–40 °C ≤Ta≤ +70 °C); IP66;
See Table 4 for process temperatures.
Special Conditions for Safe Use (X):
1. See certificate for ambient temperature range.
2. The non-metallic label may store an electrostatic charge and become a source of
ignition in Group III environments.
3. Guard the LCD display cover against impact energies greater than 4 joules.
4. Flameproof joints are not intended for repair.