Emerson Rosemount 644 - Field Mount Transmitter Installation

3.1.3 Field mount transmitter with threaded sensor installation
WARNING
Enclosure
Enclosure covers must be fully engaged to meet explosion-proof
requirements.
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.
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.
A
C
B
D
E
A. Threaded thermowell
B. Threaded style sensor
C. Standard extension
D. Field mount housing (transmitter inside)
April2023 Quick Start Guide
Quick Start Guide 9