Emerson Rosemount 644 Reference Manual page 66

Hardware Installation
March 2021
7. Seal adapter threads with thread sealant.
8. Pull the field wiring leads through the conduit into the universal head. Wire the
9. Install and tighten the universal head cover. Enclosure covers must be fully engaged
Field mount transmitter with threaded sensor installation
A. Rosemount 644 Field Mount
B. Field mount housing
C. Threaded style sensor
D. Extension
E. Threaded thermowell
Procedure
1. Attach the thermowell to the pipe or process container wall. Install and tighten
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
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
7. Seal adapter threads with silicone tape.
8. Pull the field wiring leads through the conduit into the field mount housing. Wire
9. Install and tighten the covers of two compartments. Enclosure covers must be fully
66
sensor and power leads to the transmitter (see
transmitter). Avoid contact with other terminals.
to meet explosion-proof requirements.
thermowells before applying process pressure.
environments or to satisfy code requirements.
desired.
the sensor and power leads to the transmitter. Avoid contact with other terminals.
engaged to meet explosion-proof requirements.
Reference Manual
00809-0200-4728
Wiring and powering the
Emerson.com/Rosemount