Emerson Rosemount 644 User manual

Quick Start Guide
00825-0200-4728, Rev DB
February 2015
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

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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 (document number
00809-0100-4728) for more instruction. This manual is also available electronically on
www.rosemount.com.
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. Please review the approvals section of the
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 that 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 ⫻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 . . . . . . . . . . . . . . . . . 4
Set the alarm switch . . . . . . . . . . . . . . . . . . . . 4
Verify configuration. . . . . . . . . . . . . . . . . . . . . 5
Mount the transmitter . . . . . . . . . . . . . . . . .10
Wire and apply power. . . . . . . . . . . . . . . . . .13
Perform a loop test . . . . . . . . . . . . . . . . . . . .18
Safety instrumented systems . . . . . . . . . .19
Product Certifications . . . . . . . . . . . . . . . 20

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System readiness
Confirm HART revision capability
If using HART based control or asset management systems, please 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 5.
Confirm correct device driver
Verify the latest Device Driver files are loaded on your systems to ensure
proper communications.
Download the latest Device Driver at
http://www.emersonprocess.com.en-US/documentation/deviceinstallkits/Pa
ges/AboutDeviceInstallKits.aspx or
http://www.hartcomm.org/protocol/products/products.html
Rosemount 644 device revisions and files
Table 1 provides the information necessary to ensure you have the correct Device
Driver files and Documentation for your device.
Table 1. Rosemount 644 Device Revisions and Files
Software
date Identify device Find device driver files Review instructions
Review
functionality
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 01
5 8
00809-0100-4728 See Footnote 3 for
list of changes.
7 9

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Quick Start Guide
Transmitter installation
Step 1: Set the alarm switch
Set the 644 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.
4. Apply power and set the loop to automatic control.
Figure 1. Placement of Alarm Switch
A. Alarm Switch
Note
If using an LCD display, first remove the pink foam spacer located between the LCD and cover. The
spacer can be discarded. Next, remove the display by detaching it from the top of the device, set
the switch to the desired position and reattach the LCD display.
644 Transmitter 644 Field Mount
A

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February 2015
Step 2: Verify configuration
Verify the configuration of the Rosemount 644 device upon receiving your
transmitter using any HART compliant configuration tool. See the Rosemount
644 Reference Manual (document number 00809-0200-4728) for configuration
instructions using AMS®Device Manager.
The 644 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 644 Reference Manual
(document number 00809-0200-4728) 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 on page 6. For Fast Key sequences using legacy DD's, contact
your local Emerson Process Management 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).
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 the advanced features of the transmitter, the
user will experience trouble communicating and will be prompted to turn the
communicator off. 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
www.fieldcommunicator.com 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.

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Quick Start Guide
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
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

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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
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

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Quick Start Guide
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 two
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.
Figure 3. Local Operator Interface
Table 3. LOI Button Operation
Button
Left No SCROLL
Right Yes ENTER

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February 2015
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.
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 6 to change HART revision when the correct Device Driver is loaded.

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Quick Start Guide
Step 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 13).
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. Enclosure covers must be fully
engaged to meet explosion-proof requirements.
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

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February 2015
Head mount transmitter with threaded sensor installation
(2 or 3 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 644 device, 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.
13. Install and tighten the universal head cover. 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
C
BD
E

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Quick Start Guide
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. Field mount housing (transmitter inside)
E. Conduit entry
A
C
B
D
E

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February 2015
Step 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. 644 Head Mount - Single and Dual Input Wiring Diagrams
644 Head Mount Transmitter
*The transmitter must be configured for at least a 3-wire RTD in order to recognize an RTD with a
compensation loop.
** Rosemount Inc. 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.

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Quick Start Guide
Figure 6. 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.-lbs (0.7 N-m).
4. Reattach and tighten the cover (if applicable).
5. Apply power (12 – 42 Vdc).
644 Field Mount Transmitter

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February 2015
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 that 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 feet (1500 meters).
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.
A. Sensor wires
B. Transmitter
C. Shield ground point
D. 4-20 mA loop
A
B
C
DCS
D

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Quick Start Guide
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.
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.
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

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February 2015
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.
4. Ground signal wiring shield at the power supply end.
A. Sensor wires
B. Transmitter
C. Shield ground point
D. 4-20 mA loop
DCS
A
B
C
D

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Quick Start Guide
Step 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
Initiate a loop test
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, check that 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 AMS 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.
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 7. Configuring the Tag with LOI
Device dashboard Fast Keys 3, 5, 1

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February 2015
Safety instrumented systems
For Safety Certified installations, refer to the Rosemount 644 Reference Manual
(document number 00809-0200-4728). The manual is available electronically at
www.rosemount.com or by contacting an Emerson Process Management
representative.

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Quick Start Guide
Product Certifications
European Directive Information
A copy of the EC Declaration of Conformity can be found at the end of the Quick
Start Guide. The most recent revision of the EC Declaration of Conformity can be
found at www.rosemount.com.
Ordinary Location Certification from FM Approvals
As standard, the transmitter has been examined and tested to determine that the
design meets the basic electrical, mechanical, and fire protection requirements
by FM Approvals, a nationally recognized test laboratory (NRTL) as accredited by
the Federal Occupational Safety and Health Administration (OSHA).
Installing Equipment in 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. his
information is clearly defined in the respective codes.
USA
E5 FM 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 FM Intrinsic Safety and Non-Incendive
Certificate: 3008880 [Headmount Fieldbus/PROFIBUS®, Railmount HART]
Standards: FM Class 3600: 1998, 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 Model 644 Temperature 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 options must be selected to maintain a Type 4X rating.