Emerson Rosemount 644 Quick Start Manual page 12

Quick Start Guide
Field mount transmitter with threaded sensor installation
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. Enclosure covers must be
fully engaged to meet explosion-proof requirements.
A
A. Threaded thermowell
B. Threaded style sensor
C. Standard extension
12
C
D. Field mount housing (transmitter inside)
E. Conduit entry
February 2015
B
D
E