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Emerson Rosemount 644R - 4.4 Rail mount transmitter with threaded sensor

Emerson Rosemount 644R
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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.
April 2019 Quick Start Guide
Quick Start Guide 17

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