Emerson Rosemount 644h User manual

Quick Start Guide
00825-0100-4728, Rev DB
April 2019
Rosemount™ 644H and 644R Smart
Temperature Transmitters
Device Revision 7 or Previous

Safety messages
NOTICE
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.
Important
Read this manual before working with the product. For personal and system safety, and for optimum
product performance, make sure to thoroughly understand the contents before installing, using, or
maintaining this product. The United States has two toll-free assistance numbers and one international
number.
Customer Central: 1-800-999-9307 (7:00 a.m. to 7:00 p.m. Central Standard Time)
National Response Center: 1-800-654-7768 (24 hours a day). Equipment service needs
International: 1-(952)-906-8888
WARNING
Follow instructions
Failure to follow these installation guidelines could result in death or serious injury.
Ensure only qualified personnel perform the installation.
WARNING
Explosions
Explosions could result in death or serious injury.
Installation of the transmitters in a hazardous environment must be in accordance with the
appropriate local, national, and international standards, codes, and practices. Please review the
Product Certifications section for any restrictions associated with a safe installation.
Do not remove the connection head cover in explosive atmospheres when the circuit is live.
Before connecting a handheld communicator in an explosive atmosphere, ensure the instruments
are installed in accordance with intrinsically safe or non-incendive field wiring practices.Verify the
operating atmosphere of the transmitter is consistent with the appropriate hazardous locations
certifications.
All connection head covers must be fully engaged to meet explosion-proof requirements.
WARNING
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.
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2 Rosemount 644H and 644R

WARNING
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.
Contents
Configure (bench calibration)........................ 5
Verify configuration....................................... 7
Set switches.................................................12
Mount the transmitter................................. 13
Wire and apply power.................................. 19
Perform a loop test...................................... 25
Product Certifications.................................. 27
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4 Rosemount 644H and 644R

1 Configure (bench calibration)
The Rosemount™ 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. Refer
to the Rosemount 644 Reference Manual and the Field Communicator
Reference Manual for more information.
1.1 Update the field communicator software
The Field Communicator field device revision Dev v6, Device Dashboard
(DD) v1 or higher is required for complete functionality. The device will
communicate with all previous Rosemount™ 644 DD revisions.
Use this procedure to determine if a software upgrade is required.
Figure 1-1: Connecting a communicator to a bench loop
Rosemount 644 head mount and field
mount
Rosemount 644 rail mount
B
A
A. 250Ω ≤ RL ≤ 1100Ω
B. AMS™ Device Manager
C. Power supply
D. Field Communicator
Procedure
1. Connect the sensor.
See the wiring diagram on the inside of housing cover.
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 device descriptors (DDs). Upgrade the
communicator software to access new XMTR
functions. Continue with old description?
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Need help?
•If this notice does not appear, the latest DD is installed.
•If the latest version is not available, the communicator will
communicate properly.
Note
When the transmitter is configured to use the advanced features of
the transmitter (i.e., one of the added sensor input types), 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.
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2 Verify configuration
Use fast key sequences to verfiy transmitter configuration.
The traditional interface Fast Key sequences in Table 2-1 and Table 2-2 may
be used for transmitter configuration and startup.
2.1 Field communicator traditional user interface
The traditional interface and fast key sequences.
Figure 2-1: Field Communicator Traditional Interface
Table 2-1: Traditional Interface Fast Key Sequences
Function Fast keys Function Fast Keys
Active Calibrator 1, 2, 2, 1, 3 Open Sensor
Holdoff
1, 3, 5, 3
Alarm/Saturation 1, 3, 3, 2 Percent Range 1, 1, 5
AO Alarm Type 1, 3, 3, 2, 1 Poll Address 1, 3, 3, 3, 1
Burst Mode 1, 3, 3, 3, 3 Process
Temperature
1, 1
Burst Option 1, 3, 3, 3, 4 Process Variables 1, 1
Calibration 1, 2, 2 PV Damping 1, 3, 3, 1, 3
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Table 2-1: Traditional Interface Fast Key Sequences (continued)
Function Fast keys Function Fast Keys
Callendar-Van
Dusen
1, 3, 2, 1 PV Unit 1, 3, 3, 1, 4
Configuration 1, 3 Range Values 1, 3, 3, 1
D/A Trim 1, 2, 2, 2 Review 1, 4
Damping Values 1, 1, 10 Scaled D/A Trim 1, 2, 2, 3
Date 1, 3, 4, 2 Sensor Connection 1, 3, 2, 1, 1
Descriptor 1, 3, 4, 3 Sensor 1 Setup 1, 3, 2, 1, 2
Device Info 1, 3, 4 Sensor Serial
Number
1, 3, 2, 1, 4
Device Output
Configuration
1, 3, 3 Sensor 1 Trim 1, 2, 2, 1
Diagnostics and
Service
1, 2 Sensor 1 Trim-
Factory
1, 2, 2, 1, 2
Filter 50/60 Hz 1, 3, 5, 1 Sensor Type 1, 3, 2, 1, 1
Hardware Rev 1, 4, 1 Software Revision 1, 4, 1
HART Output 1, 3, 3, 3 Status 1, 2, 1, 4
Intermittent
Detect
1, 3, 5, 4 Tag 1, 3, 4, 1
LCD Display
Options
1, 3, 3, 4 Terminal
Temperature
1, 3, 2, 2
Loop Test 1, 2, 1, 1 Test Device 1, 2, 1
LRV (Lower Range
Value)
1, 1, 6 URV (Upper Range
Value)
1, 1, 7
LSL (Lower Sensor
Limit)
1, 1, 8 USL (Upper Sensor
Limit)
1, 1, 9
Measurement
Filtering
1, 3, 5 Variable Mapping 1, 3, 1
Message 1, 3, 4, 4 Variable Re-Map 1, 3, 1, 5
Meter Configuring 1, 3, 3, 4, 1 Write Protect 1, 2, 3
Meter Decimal
Point
1, 3, 3, 4, 2 2-Wire Offset 1, 3, 2, 1, 2, 1
Num Req Preams 1, 3, 3, 3, 2
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2.2 Input/verify the Callendar Van-Dusen constants on the
Field Communicator traditional user interface
If using sensor matching with this combination of a transmitter and sensor,
verify the constants input.
Procedure
1. From the Home screen, select 1 Device Setup > 3 Configuration > 2
Sensor Config > 1 Sensor 1 > 3 Cal Van-Dusen.
2. Set the control loop to manual and select OK.
3. At the Enter Sensor Type prompt, select Cal Van-Dusen
4. At the Enter Sensor Connection prompt, select the
appropriate number of wires.
5. Enter the R0, Alpha, Beta, and Delta values from the stainless steel
tag attached to the special-order sensor.
6. Return the control loop to automatic control and select OK.
2.3 Field Communicator device dashboard
Figure 2-2: Device Dashboard
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Table 2-2: Device Dashboard Fast Key Sequences
Function Fast keys Function Fast keys
Active Calibrator 2, 2, 4, 2 Num Req Preams 2, 2, 5, 2
Alarm/Saturation 2, 2, 2, 6 Open Sensor
Holdoff
2, 2, 4, 4
Burst Mode 2, 2, 5, 3 Percent Range 2, 2, 2, 4
Burst Option 2, 2, 5, 4 Poll Address 2, 2, 5, 1
Calibration 2, 1, 2 PV Damping 2, 2, 1, 6
Callendar-Van
Dusen
2, 2, 1, 10 PV Unit 2, 2, 1, 4
Configuration 2, 1, 1 Range Values 2, 2, 2, 5
D/A Trim 3, 4, 2 Scaled D/A Trim 3, 4, 3
Damping Values 2, 2, 1, 6 Sensor Connection 2, 2, 1, 3
Date 1, 7, 8 Sensor 1 Setup 2, 2, 1
Descriptor 1, 7, 6 Sensor Serial
Number
2, 2, 1, 7
Device Info 1, 7 Sensor 1 Trim 3, 4, 1
Device Output
Configuration
2, 2, 2 Sensor 1 Trim-
Factory
3, 4, 1, 2
Filter 50/60 Hz 1, 3, 3 Sensor Type 2, 2, 1, 2
Hardware Rev 1, 7, 9, 3 Software Revision 1, 7, 9, 4
HART Output 2, 2, 5 Tag 2, 2, 4, 1, 1
LCD Display
Options
2, 2, 3 Terminal
Temperature
3, 3, 2
Loop Test 3, 5, 1 URV (Upper Range
Value)
2, 2, 2, 5, 2
LRV (Lower Range
Value)
2, 2, 2, 5, 3 USL (Upper Sensor
Limit)
2, 2, 1, 8
LSL (Lower Sensor
Limit)
2, 2, 1, 9 Variable Mapping 2, 2, 5, 5
Message 1, 7, 7 Variable Re-Map 2, 2, 5, 5, 5
Meter Configuring 2, 2, 3, 1 Write Protect 2, 2, 4, 6
Meter Decimal
Point
2, 2, 3, 2 2-Wire Offset 2, 2, 1, 5
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10 Rosemount 644H and 644R

2.4 Input/verify the Callendar Van-Dusen constants on the
Field Communicator device dashboard
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 Van-Dusen
4. At the Enter Sensor Connection prompt, select the
appropriate number of wires.
5. Enter the R0, Alpha, Beta, and Delta values from the stainless steel
tag attached to the special-order sensor.
6. Return the control loop to automatic control and select OK.
7. Disable the transmitter-sensor matching feature.
a) From the Home screen, select 2 Configure > 2 Manual Setup
> 1 Sensor > 10 SensorMatching-CVD.
b) At the Enter Sensor Type prompt, select the
appropriate sensor type.
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3 Set switches
3.1 Set switches on the Rosemount™ 644H without LCD
display
The switch is located on the bottom right of the electronics module.
Procedure
1. Set the loop to manual (if applicable) and disconnect the power.
2. Remove the electronics housing cover.
3. Set the switch to the desired position.
4. Replace the electronics housing cover.
5. Apply power and set the loop to automatic control.
3.2 Set switches on the Rosemount™ 644H withLCD display
The switch is located on the bottom right of the electronics module.
Procedure
1. Set the loop to manual (if applicable) and disconnect the power.
2. Remove the electronics housing cover.
3. Snap-off the LCD display straight off.
4. Set the switch to the desired position.
5. Reattach the LCD display and replace the electronics housing cover.
Rotate the LCD display in 90° increments.
6. Apply power and set the loop to automatic control.
3.3 Set switches on the Rosemount™ 644R
The switch is located on the middle of the front panel.
Procedure
1. Open the transmitter's front door.
2. Set the switch to the desired position.
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12 Rosemount 644H and 644R

4 Mount the transmitter
Mount the transmitter at a high point in the conduit run to prevent moisture
from draining into the transmitter housing.
4.1 Install connection head
Head mount transmitter with DIN plate style sensor.
Procedure
1. Attach the thermowell to the pipe or process container wall. Install
and tighten the thermowell before applying process pressure.
2. Assemble the transmitter to the sensor. Push the transmitter
mounting screws through the sensor mounting plate and insert the
snap rings (optional) into the transmitter mounting screw groove.
3. Wire the sensor to the transmitter.
4. Insert the transmitter-sensor assembly into the connection head.
Thread the transmitter mounting screws into the connection head
mounting holes. Assemble the extension to the connection head.
Insert the assembly into the thermowell.
5. Slip the shielded cable though the cable gland.
6. Attach the cable gland into the shielded cable.
7. Insert the shielded cable leads into the connection head through the
cable entry. Connect and tighten the cable gland.
8. Connect the shielded power cable leads to the transmitter power
terminals.
Avoid contact with sensor leads and sensor connections.
9. Install and tighten the connection head cover.
WARNING
Enclosure covers must be fully engaged to meet explosion-proof
requirements.
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Example
D
A
E
B
F
C
A. Rosemount™ 644 Transmitter
B. Connection head
C. Thermowell
D. Transmitter mounting screws
E. Integral mount sensor with flying leads
F. Extension
4.2 Install universal head
Head mount transmitter with threaded sensor.
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.
Seal the nipple and adapter threads with silicone tape.
3. Screw the sensor into the thermowell. Install drain seals if required
for severe environments or to satisfy code requirements.
4. 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.
Note
The transient protector requires the use of an enclosure of at least
3.5-in. (89 mm) in diameter.
5. Pull the sensor wiring leads through the universal head and
transmitter. Mount the transmitter in the universal head by
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14 Rosemount 644H and 644R

threading the transmitter mounting screws into the universal head
mounting holes.
6. Mount the transmitter-sensor assembly into the thermowell. Seal
adapter threads with silicone tape.
7. Install conduit for field wiring to the conduit entry of the universal
head. Seal conduit threads with PTFE tape.
8. 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.
9. Install and tighten the universal head cover.
Enclosure covers must be fully engaged to meet explosion-proof
requirements.
Example
ABC
D
E
A. Threaded thermowell
B. Standard extension
C. Threaded style sensor
D. Universal head (transmitter and LCD inside)
E. Conduit entry
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4.3 Rail mount transmitter and sensor
Figure 4-1: Rail mount transmitter and sensor exploded view
A
B
C
D
E
F
A. Rail mount transmitter
B. Sensor leads with cable glands
C. Integral mount sensor with terminal block
D. Connection head
E. Standard extension
F. Threaded thermowell
Procedure
1. Attach the transmitter to a suitable rail or panel.
2. Attach the thermowell to the pipe or process container wall.
3. Install and tighten the thermowell, according to plant standards,
before applying pressure.
4. Attach the sensor to the connection head and mount the entire
assembly to the thermowell.
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16 Rosemount 644H and 644R

5. Attach and connect sufficient lengths of sensor lead wire from the
connection head to the sensor terminal block.
6. Tighten the connection head cover.
Important
Enclosure covers must be fully engaged to meet explosion-proof
requirements.
7. Run sensor lead wires from the sensor assembly to the transmitter.
8. Verify the transmitter failure mode switch.
9. Attach the sensor wires to the transmitter.
See Wire and apply power
4.4 Rail mount transmitter with threaded sensor
Figure 4-2: Rail Mount Transmitter with Threaded Sensor Exploded View
D
A
E
B
F
C
A. Rail mount transmitter
B. Threaded sensor connection head
C. Threaded style sensor
D. Standard extension
E. Threaded thermowell
Procedure
1. Attach the transmitter to a suitable rail or panel.
2. Attach the thermowell to the pipe or process container wall.
3. Install and tighten the thermowell, according to plant standards,
before applying pressure.
4. Attach the necessary extension nipples and adapters.
Seal the nipple and adapter threads with silicone tape.
5. Screw the sensor into the thermowell.
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Important
Install drain seals if required for severe environments or to satisfy
code requirements.
6. Screw the connection head to the sensor.
7. Attach the sensor lead wires to the connection head terminals.
8. Attach additional sensor lead wires from the connection head to the
transmitter.
9. Attach and tighten the connection head cover.
Important
Enclosure covers must be fully engaged to meet explosion-proof
requirements.
10. Set the transmitter failure mode switch.
11. Attach the sensor wires to the transmitter.
See Wire and apply power
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18 Rosemount 644H and 644R

5 Wire and apply power
5.1 Wire the transmitter
Wiring diagrams are located inside the terminal block cover.
Table 5-1: Sensor Connections Diagram
2-wire RTD and V 3-wire RTD and
V (1)
4-wire RTD and V T/C and mV (2)
(1) Rosemount™ provides 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.
(2) The transmitters must be configured for at least a 3-wire RTD in order to
recognize an RTD with a compensation loop.
5.2 Power the transmitter
Rosemount 644H Rosemount 644R
1 2 3 4
A
B
C
A
B
C
Note
Max torque is 6 in-lbs. (0.7 N-m)
A. Sensor terminals
B. Communication terminals
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C. Power/configuration terminals
Prerequisites
An external power supply is required to operate the transmitter.
Procedure
1. Remove the terminal block cover (if applicable).
2. Connect the power leads to the terminals.
a) Connect the positive power lead to the "+" terminal.
b) Connect the negative power lead to the "-" terminal.
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).
5.3 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.
NOTICE
To prevent damaging the transmitter, do not allow terminal voltage to drop
below 12.0 Vdc when changing the configuration parameters.
5.4 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).
5.4.1 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.
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20 Rosemount 644H and 644R