Emerson Rosemount 644 - 3.1.2 Head mount transmitter with threaded sensor installation (two or three conduit entries)

A. Connection head cover
B. Connection head
C. Thermowell
D. Transmitter mounting screws
E. Integral mount sensor with flying leads
F. Extension
3.1.2 Head mount transmitter with threaded sensor installation
(two or three conduit entries)
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.
2. Install and tighten thermowells before applying process
pressure.
3. Attach necessary extension nipples and adapters to the
thermowell.
4. Seal the nipple and adapter threads with silicone tape.
5. Screw the sensor into the thermowell. Install drain seals
if required for severe environments or to satisfy code
requirements.
6. Verify the transmitter failure mode switch is in the desired
position.
7. Verify the correct installation of Integral Transient Protection
(option code T1).
a) Ensure the transient protector unit is firmly connected
to the transmitter puck assembly.
April2023 Quick Start Guide
Quick Start Guide 7