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Specifications and Reference Data
Specifications and Reference Data
July 2016
Reference Manual
00809-0100-4728, Rev MB
Appendix A
Specifications and Reference Data
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 83
4–20 mA / HART specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 85
Dimensional drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 88
Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 91
Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 96
Specifications and Reference Data for Rosemount 644 HART Head Mount . . . . . . . . . . . . . . . page 97
A.1 Specifications
A.1.1 Functional
Inputs
User-selectable; sensor terminals rated to 42.4 Vdc. See
for sensor options.
Output
Single 2-wire device with 4-20 mA/HART
®
(Revision 5 or 7
Selectable), linear with temperature or input.
Isolation
Input/output isolation tested to 620 Vrms (876.8 Vpp) at 50/60 Hz
Local display
The optional five-digit integral LCD display includes a floating or
fixed decimal point. It can also display engineering units (°F, °C, °R,
K,
, and millivolts), mA, and percent of span. The display can be
configured to alternate between selected display options. Display
settings are preconfigured at the factory according to the standard
transmitter configuration. They can be reconfigured in the field
using HART communications.
The device also supports the use of a two-line, 8- and 6-digit
(respectively) Local Operator Interface display supporting the
same functionality as the basic display with the added capability to
perform a number of configuration tasks on the Rosemount 644.
Humidity limits
0–95% relative humidity
Update time
0.5 seconds per sensor
1 sec - Head mount HART ordered with Dual Sensors)
Accuracy
(default configuration) PT 100
HART protocol (0-100 °C): ±0.18 °C
±0.1 °C (when ordered with option P8)
A.1.2 Physical
Electrical connections
Field Communicator connections
Materials of construction
Materials of constructions (stainless steel housing for
Biotechnology, Pharmaceutical Industries, and Sanitary
Applications)
Housing and Standard Meter Cover
316 SST
Cover O-Ring
Buna-N
Model
Power and sensor terminals
Rosemount
™
644H
Compression screws permanently fixed to
terminal block
Rosemount
644R
Compression screw permanently fixed to front
panel
Communication terminals
Rosemount 644H Clips permanently fixed to terminal block
Rosemount 644R
Clips permanently fixed to front panel
Electronics housing and terminal block
Rosemount
644H
GE polyphenylene oxide glass reinforced
Rosemount
644R
Polycarbonate
Enclosure (Options J5, J6, R1, and R2)
Housing
Low-copper aluminum
Paint
Polyurethane
Cover O-ring
Buna-N
Summary of Contents for Rosemount 644 HART
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Page 16: ...6 Reference Manual 00809 0100 4728 Rev MB Introduction July 2016 Introduction ...
Page 86: ...76 Reference Manual 00809 0100 4728 Rev MB Troubleshooting July 2016 Troubleshooting ...
Page 138: ...128 Reference Manual 00809 0100 4728 Rev MB Index July 2016 Index ...
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