Emerson Rosemount 644 User manual

Reference Manual
00809-0200-4728, Rev RA
April 2015
Rosemount 644 Temperature Transmitter
with HART®Protocol

Reference Manual
00809-0200-4728, Rev RA
Title Page
April 2015
iii
Rosemount 644
Temperature Transmitter
Rosemount 644 Hardware Revision 30 1 1
Device Revision 7 8 9
HART®Revision 557
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. CST)
National Response Center
1-800-654-7768 (24 hours a day)
Equipment service needs
International
1-(952)-906-8888
The products described in this document are NOT designed for nuclear-qualified
applications.
Using non-nuclear qualified products in applications that require nuclear-qualified
hardware or products may cause inaccurate readings.
For information on Rosemount nuclear-qualified products, contact a Emerson Process
Management Sales Representative.

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1Section 1: Introduction
1.1 Safety messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
1.1.1 Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
1.2 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
1.2.1 Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
1.2.2 Transmitter overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.3 Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
1.3.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
1.3.2 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
1.3.3 Mechanical. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
1.3.4 Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
1.3.5 Environmental. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
1.4 Return of materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.5 Transmitter security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
1.5.1 Available security options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
2Section 2: Configuration
2.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
2.2 Safety messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
2.2.1 Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
2.3 System readiness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
2.3.1 Confirm correct device driver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
2.3.2 Surges/transients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
2.4 Configuration methods. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
2.4.1 Configuring on the bench . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
2.4.2 Choosing a configuration tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
2.4.3 Setting the loop to manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
2.4.4 Failure mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
2.4.5 HART software lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
2.5 Verify configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
2.5.1 Verify and review configuration with Field Communicator . . . . . . . . . . . .13
2.5.2 Verify and review configuration with AMS Device Manager . . . . . . . . . . . .14
2.5.3 Verify and review configuration with LOI . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
2.5.4 Checking transmitter output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
2.6 Basic configuration of the transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
2.6.1 Mapping the HART variables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
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2.6.2 Configuring the sensor(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
2.6.3 Setting output units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
2.7 Configure dual sensor options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
2.7.1 Differential temperature configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
2.7.2 Average temperature configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
2.7.3 Hot Backup configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
2.7.4 Sensor drift alert configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
2.8 Configure device outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
2.8.1 Re-range the transmitter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
2.8.2 Damping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
2.8.3 Configure alarm and saturation levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
2.8.4 Configuring the LCD display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
2.9 Inputting device information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
2.9.1 Tag, date, descriptor and message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
2.10 Configure measurement filtering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
2.10.1 50/60 Hz filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
2.10.2 Resetting the device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
2.10.3 Intermittent Sensor Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
2.10.4 Open Sensor Hold Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
2.11 Diagnostics and service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
2.11.1 Performing a loop test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
2.11.2 Simulate digital signal (digital loop test). . . . . . . . . . . . . . . . . . . . . . . . . . . .37
2.11.3 Thermocouple Degradation Diagnostic . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
2.11.4 Minimum/maximum tracking diagnostic . . . . . . . . . . . . . . . . . . . . . . . . . . .40
2.12 Establishing multi drop communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
2.12.1 Changing a transmitter address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
2.13 Using the transmitter with the HART Tri-Loop . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
2.13.1 Set the transmitter to burst mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
2.13.2 Set process variable output order. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
3Section 3: Hardware Installation
3.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
3.2 Safety messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
3.2.1 Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
3.3 Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
3.3.1 Installation considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
3.3.2 Environmental considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

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3.4 Installation procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
3.4.1 Set the alarm switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
3.4.2 Mount the transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
3.4.3 Install the device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
3.4.4 Multichannel installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
3.4.5 LCD display installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
4Section 4: Electrical Installation
4.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
4.2 Safety messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
4.2.1 Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
4.3 Wiring and powering the transmitter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
4.3.1 Sensor connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
4.3.2 Power the transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
4.3.3 Ground the transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
4.3.4 Wiring with a Rosemount 333 HART Tri-Loop™ (HART/4–20 mA only). .66
5Section 5: Operation and Maintenance
5.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
5.2 Safety messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
5.2.1 Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70
5.3 Calibration overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70
5.3.1 Trimming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
5.4 Sensor input trim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
5.4.1 Recall factory trim—sensor trim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73
5.4.2 Active calibrator and EMF compensation. . . . . . . . . . . . . . . . . . . . . . . . . . . .73
5.5 Trim the analog output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74
5.5.1 Analog output trim or scaled analog output trim. . . . . . . . . . . . . . . . . . . . .74
5.5.2 Analog output trim. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74
5.5.3 Performing a scaled output trim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
5.6 Transmitter-sensor matching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76
5.7 Switching HART Revision . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78
5.7.1 Switching HART Revision using the generic menu . . . . . . . . . . . . . . . . . . . .78
5.7.2 Switching HART Revision using a Field Communicator . . . . . . . . . . . . . . . .78
5.7.3 Switching HART Revision with AMS Device Manager. . . . . . . . . . . . . . . . . .78
5.7.4 Switching HART Revision with LOI. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78

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6Section 6: Troubleshooting
6.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79
6.2 Safety messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79
6.3 Troubleshooting the 4-20 mA/HART® output. . . . . . . . . . . . . . . . . . . . . . . . . . . . .80
6.4 Diagnostic messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82
6.4.1 Diagnostic messages: Failed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82
6.4.2 Diagnostic messages: Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83
6.4.3 Other LCD display messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84
7Section 7: Safety Instrumented Systems (SIS) Certification
7.1 SIS certification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85
7.2 644 safety certified identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85
7.3 Installation in SIS application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86
7.4 Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86
7.5 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87
7.5.1 Damping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87
7.6 Alarm and saturation levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87
7.7 644 SIS operation and maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88
7.7.1 Proof test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88
7.7.2 Partial proof test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88
7.7.3 Comprehensive proof test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89
7.7.4 Comprehensive proof test 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89
7.8 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90
7.8.1 Failure rate data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90
7.8.2 SIS safety transmitter failure values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .91
7.8.3 Product life. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .91
AAppendix A: Specifications and Reference Data
A.1 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93
A.1.1 Functional. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93
A.1.2 Physical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .94
A.1.3 Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96
A.2 4–20 mA / HART specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98
A.3 Dimensional drawings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
A.4 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
A.4.1 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
A.4.2 Tagging. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

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A.4.3 Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
A.5 Specifications and reference data for 644 HART Head Mount. . . . . . . . . . . . . . 121
A.5.1 Functional specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
A.5.2 Physical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
A.5.3 Performance specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
A.5.4 4–20 mA/HART specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
BAppendix B: Product Certifications
B.1 Approved Manufacturing Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
B.2 European Directive Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
B.2.1 Ordinary Location Certification from FM Approvals . . . . . . . . . . . . . . . . . 129
B.2.2 Installing Equipment in North America. . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
B.2.3 Hazardous Locations Certifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
CAppendix C: Field Communicator Menu Trees and Fast Keys
C.1 Field Communicator menu trees. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
C.2 Field Communicator Fast Keys. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
DAppendix D: Local Operator Interface (LOI)
D.1 Number entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
D.2 Text entry. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
D.2.1 Scrolling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
D.3 Timeout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
D.4 Saving and canceling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
D.5 LOI menu tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
D.6 LOI menu tree – extended menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166

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Table of Contents

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Section 1: Introduction
April 2015
1
Introduction
Section 1 Introduction
1.1 Safety messages
Instructions and procedures in this section may require special precautions to ensure the safety
of the personnel performing the operations. Information that potentially raises safety issues is
indicated by a warning symbol ( ). Refer to the following safety messages before performing
an operation preceded by this symbol.
1.1.1 Warnings
Failure to follow these installation guidelines could result in death or
serious injury.
Make sure only qualified personnel perform the installation.
Explosions could result in death or serious injury.
Do not remove the connection head cover in explosive atmospheres when the
circuit is live.
Before connecting HART®in an explosive atmosphere, make sure the instruments in
the loop are installed in accordance with intrinsically safe or non-incendive field wiring
practices.
Verify the operating atmosphere of the transmitter is consistent with the appropriate
hazardous locations certifications.
All connection head covers must be fully engaged to meet explosion-proof
requirements.
Process leaks 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 could cause death or serious injury.
Use extreme caution when making contact with the leads and terminals.

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Introduction
1.2 Overview
1.2.1 Manual
This manual is designed to assist in the installation, operation, and maintenance of Rosemount
644 Head Mount, 644 Field Mount, and 644 Rail Mount transmitters with the HART protocol.
Section 2: Configuration provides instruction the commissioning and operating the Rosemount
644 HART Transmitter. The information explains how to configure software functions and many
configuration parameters on an Asset Management System, a Field Communicator, and the
Local Operator Interface display option.
Section 3: Hardware Installation contains mechanical installation instructions for the
transmitter.
Section 4: Electrical Installation contains electrical installation instructions and considerations
for the transmitter.
Section 5: Operation and Maintenance contains common operation and maintenance
techniques for the transmitter.
Section 6: Troubleshooting provides troubleshooting techniques for the most common
transmitter operating problems.
Section 7: Safety Instrumented Systems (SIS) Certification provides identification, installation,
configuration, operation and maintenance, and inspection information for Safety Instrumented
Systems as it pertains to the Rosemount 644 Head Mount and Field Mount Temperature
Transmitter.
Appendix A: Specifications and Reference Data
This section supplies transmitter specifications and reference data as well as transmitter
ordering information.
Appendix B: Product Certifications contains the approved manufacturing locations, Hazardous
Location Product Certification information, European Union Directive information and
Installation Drawings.
Appendix C: Field Communicator Menu Trees and Fast Keys contains Field Communicator menu
trees and Field Communicator Fast Keys.
Appendix D: Local Operator Interface (LOI) contains instructions for number entry, text entry, as
well as the LOI menu tree and LOI extended menu tree.

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Introduction
1.2.2 Transmitter overview
The Rosemount 644 Head Mount and Field Mount Temperature Transmitters support the
following features:
HART configuration with Selectable HART revision capability (Revisions 5 or 7)
Accepts either 1 or 2 inputs from a wide variety of sensor types (2, 3, and 4-wire RTD,
Thermocouple, mV and Ohm)
A compact transmitter size with electronics completely encapsulated in protective
silicone and enclosed in a plastic housing ensuring long-term transmitter reliability
Optional Safety Certification Option (IEC 61508 SIL 2)
Optional enhanced accuracy and stability performance
Optional LCD display with extended temperature ratings of -40 °C to 85 °C
Optional advanced LCD display with local operator interface (LOI)
The 644 Head Mount Transmitter is available in two housing materials (Aluminum and
SST) and various housing options that allow for mounting flexibility in a variety of
environmental conditions. The 644 Field Mount is available in an aluminum housing.
Special dual-sensor features include Hot Backup™, Sensor Drift Alert, first good,
differential and average temperature measurements, and four simultaneous
measurement variable outputs in addition to the analog output signal
Additional advanced features include: Thermocouple Degradation Diagnostic, which
monitors thermocouple health, and process and transmitter minimum/maximum
temperature tracking
The Rosemount 644 Rail Mount Temperature Transmitter supports the following features:
4-20mA/HART protocol (Revision 5)
Accepts 1 sensor input from a wide variety of sensor types (2, 3, and 4-wire RTD,
Thermocouple, mV and Ohm)
Completely encapsulated electronics to ensure long term transmitter reliability
Refer to the following literature for a full range of compatible connection heads, sensors, and
thermowells provided by Emerson Process Management.
Temperature Sensors and Assemblies Product Data Sheet, Volume 1 (document
number 00813-0100-2654)
Temperature Sensors and Assemblies Product Data Sheet, Metric (document number
00813-0200-2654)

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Section 1: Introduction
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Introduction
1.3 Considerations
1.3.1 General
Electrical temperature sensors such as RTDs and thermocouples produce low-level signals
proportional to their sensed temperature. The 644 converts the low-level sensor signal to a
standard 4–20 mA DC or digital HART signal that is relatively insensitive to lead length and
electrical noise. This signal is then transmitted to the control room via two wires.
1.3.2 Commissioning
The transmitter can be commissioned before or after installation. It may be useful to
commission it on the bench, before installation, to ensure proper operation and to become
familiar with its functionality. Make sure the instruments in the loop are installed in accordance
with intrinsically safe, or non-incendive field wiring practices.
1.3.3 Mechanical
Location
When choosing an installation location and position, take into account the need for access to
the transmitter.
Special mounting
Special mounting hardware is available for mounting a 644 Head Mount Transmitter to a DIN rail
or assembling a new 644 Head Mount to an existing threaded sensor connection head (former
option code L1).
1.3.4 Electrical
Proper electrical installation is necessary to prevent errors due to sensor lead resistance and
electrical noise. For best results, shielded cable should be used in electrically noisy
environments.
Make wiring connections through the cable entry in the side of the housing. Be sure to provide
adequate clearance for cover removal.
1.3.5 Environmental
The transmitter electronics module is permanently sealed within a plastic enclosure, resisting
moisture and corrosive damage. Verify that the operating atmosphere of the transmitter is
consistent with the appropriate hazardous locations certifications.
Temperature effects
The transmitter will operate within specifications for ambient temperatures between –40 and
185 °F (–40 °C and 85 °C). Heat from the process is transferred from the thermowell to the
transmitter housing. If the expected process temperature is near or beyond specification limits,
consider the use of additional thermowell lagging, an extension nipple, or a remote mounting
configuration to isolate the transmitter from the process.
Figure 1-1 provides an example of the relationship between transmitter housing temperature
rise and extension length.

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Section 1: Introduction
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Introduction
Figure 1-1. 644 Head Mount Transmitter Connection Head Temperature Rise vs. Extension
Length
Example
The maximum permissible housing temperature rise (T) can be calculated by subtracting the
maximum ambient temperature (A) from the transmitter’s ambient temperature specification
limit (S). For instance, if A = 40 °C.
T = S - A
T = 85 °C – 40 °C
T = 45 °C
For a process temperature of 540 °C (1004 °F), an extension length of 3.6 inches (91.4 mm)
yields a housing temperature rise (R) of 22 °C (72 °F), providing a safety margin of 23 °C (73 °F). A
6.0 inch (152.4 mm) extension length (R = 10 °C [50 °F]) offers a higher safety margin (35 °C
[95 °F]) and reduces temperature-effect errors but would probably require extra transmitter
support. Gauge the requirements for individual applications along this scale. If a thermowell
with lagging is used, the extension length may be reduced by the length of the lagging.
1.4 Return of materials
To expedite the return process in North America, call the Emerson Process Management
National Response Center toll-free at 800-654-7768. This center, available 24 hours a day, will
assist you with any needed information or materials.
The center will ask for the following information:
Product model
Serial numbers
The last process material to which the product was exposed
60 (108)
50 (90)
40 (72)
30 (54)
20 (36)
10 (18)
0
3456789
815 C (1500 F)
Oven Temperature
540 C (1000 F)
Oven Temperature
250 C (482 F)
Oven Temperature
Housing Temperature Rise Above Ambient C ( F)
Extension Length (in.)
3.6
22

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Introduction
The center will provide:
A Return Material Authorization (RMA) number
Instructions and procedures that are necessary to return goods that were exposed to
hazardous substances
For other locations, contact an Emerson Process Management sales representative.
Note
If a hazardous substance is identified, a Material Safety Data Sheet (MSDS), required by law to be
available to people exposed to specific hazardous substances, must be included with the
returned materials.
1.5 Transmitter security
1.5.1 Available security options
There are three security methods to utilize with the Rosemount 644 Transmitter.
Software Security Switch (Write Protect)
HART Lock
LOI Password
The Write Protect feature allows you to protect the transmitter data from accidental or
unwarranted configuration changes. To enable the write protect feature, perform the following
procedures.
Configuring Write Protect, HART Lock and LOI password with a
Field Communicator
From the HOME screen, enter the Fast Key sequence.
Configuring Write Protect, HART Lock and LOI password with
AMS®Device Manager
1. Right click on the device and select the Configure menu.
2. In the left navigation pane select Manual Setup then select the Security tab.
All three parameters can be configured from this screen.
3. Select Apply when complete.
Device Dashboard Fast Keys-Write Protect 2, 2, 9, 1
Device Dashboard Fast Keys-HART Lock 2, 2, 9, 2
Device Dashboard Fast Keys- LOI Password 2, 2, 9, 3

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Section 2: Configuration
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Configuration
Section 2 Configuration
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 7
Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 7
System readiness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 8
Configuration methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 9
Verify configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 13
Basic configuration of the transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 16
Configure dual sensor options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 20
Configure device outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 25
Inputting device information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 32
Configure measurement filtering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 34
Diagnostics and service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 36
Establishing multi drop communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 41
Using the transmitter with the HART Tri-Loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 42
2.1 Overview
This section contains information on commissioning and tasks that should be performed on the
bench prior to installation. Field Communicator, AMS®Device Manager, and Local Operator
Interface (LOI) instructions are given to perform configuration functions. For convenience, Field
Communicator Fast Key sequences are labeled “Fast Keys,” and abbreviated LOI menus are
provided for each function below. The LOI is only available on the 644 Head mount and Field
mount designs, and the configuration instructions referencing the interface will not apply to the
Rail mount form factor.
Full Field Communicator menu trees and Fast Key sequences are available in Appendix C: Field
Communicator Menu Trees and Fast Keys. Local Operator Interface menu trees are available in
Appendix D: Local Operator Interface (LOI).
2.2 Safety messages
Instructions and procedures in this section may require special precautions to ensure the safety
of the personnel performing the operations. Information that potentially raises safety issues is
indicated by a warning symbol ( ). Refer to the following safety messages before performing
an operation preceded by this symbol.

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Section 2: Configuration
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Configuration
2.2.1 Warnings
2.3 System readiness
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 “System
readiness” on page 8.
2.3.1 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 www.emersonprocess.com or
www.hartcomm.org
Failure to follow these installation guidelines could result in death or serious injury.
Make sure only qualified personnel perform the installation.
Explosions could result in death or serious injury.
Do not remove the connection head cover in explosive atmospheres when the
circuit is live.
Before connecting a Field 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.
Verify the operating atmosphere of the transmitter is consistent with the appropriate
hazardous locations certifications.
All connection head covers must be fully engaged to meet explosion-proof
requirements.
Process leaks 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 could cause death or serious injury.
Use extreme caution when making contact with the leads and terminals.
Table 2-1. Rosemount 644 Device Revisions and Files
Software date Identify device Find device driver files Review
instructions
Review
functionality
Date NAMURSoftware
Revision
HARTSoftware
Revision
HARTUniversal
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 the 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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Configuration
2.3.2 Surges/transients
The transmitter will withstand electrical transients of the energy level encountered in static
discharges or induced switching transients. However, high-energy transients, such as those
induced in wiring from nearby lightning strikes, welding, heavy electrical equipment, or
switching gears, can damage both the transmitter and the sensor. To protect against
high-energy transients, install the transmitter into a suitable connection head with the integral
transient protector, option T1. Refer to the 644 Product Data Sheet for more information.
2.4 Configuration methods
The Rosemount 644 can be configured either before or after installation. Configuring the
transmitter on the bench using either a Field Communicator, AMS Device Manager, or LOI
ensures all transmitter components are in working order prior to installation.
The 644 transmitter can be configured either on-line or off-line using a Field Communicator,
AMS Device Manager or the optional LOI (Head mount and field mount). During on-line
configuration, the transmitter is connected to a Field communicator. Data is entered in the
working register of the communicator and sent directly to the transmitter.
Off-line configuration consists of storing configuration data in a Field Communicator while it is
not connected to a transmitter. Data is stored in nonvolatile memory and can be downloaded to
the transmitter at a later time.
2.4.1 Configuring on the bench
To configure on the bench, required equipment includes a power supply, a digital multimeter
(DMM), and a Field Communicator, AMS Device Manager, or a LOI – Option M4.
Connect the equipment as shown in Figure 2-1. Connect HART Communication leads at any
termination point in the signal loop. To ensure successful HART communication, a resistance of
at least 250 ohms must be present between the transmitter and the power supply. Connect the
Field Communicator leads to the clips behind the power (+,-) terminals on the top of the device.
Avoid exposing the transmitter electronics to the plant environment after installation by setting
all transmitter jumpers during the commissioning stage on the bench.
Set all transmitter hardware adjustments during commissioning to avoid exposing the
transmitter electronics to the plant environment after installation.

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Configuration
Figure 2-1. Powering the Transmitter for Bench Configuration
A. Power Supply
B. Field Communicator
Note
Signal loop may be grounded at any point or left ungrounded.
A Field Communicator may be connected at any termination point in the signal loop.
The signal loop must have between 250 and 1100 ohms load for communications.
Max torque is 6 in.-lbs (0.7 N-m)
2.4.2 Choosing a configuration tool
Configuring with a Field Communicator
The Field Communicator is a hand-held device that exchanges information with the transmitter
from the control room, the instrument site, or any wiring termination point in the loop. To
facilitate communication, connect the Field Communicator, shown in this manual, in parallel
with the transmitter (see Figure 2-1). Use the loop connection ports on the rear panel of the
Field Communicator. The connections are non-polarized. Do not make connections to the serial
port or the Ni-Cad recharger jack in explosive atmospheres. Before connecting the Field
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.
There are two interfaces available with the Field Communicator: Traditional and Dashboard
interfaces. All steps using a Field Communicator will be using Dashboard interfaces. Figure 2-2
shows the Device Dashboard interface. As stated in “System readiness” on page 8, it is critical
that the latest DD’s are loaded into the Field Communicator for optimal transmitter
performance.
Visit www.emersonprocess.com to download latest DD library.
Turn on the Field Communicator by pressing the ON/OFF key. The Field Communicator will
search for a HART-compatible device and indicate when the connection is made. If the Field
Communicator fails to connect, it indicates that no device was found. If this occurs, refer to
Section 6: Troubleshooting.
644 Head Mount and Field Mount 644 Rail Mount
B
250 Ω≤ RL ≤1100 Ω
A