Emerson Rosemount 644R - Install Universal Head

Example
D
A
E
B
F
C
A. Rosemount
™
644 Transmitter
B. Connection head
C. Thermowell
D. Transmitter mounting screws
E. Integral mount sensor with flying leads
F. Extension
4.2 Install universal head
Head mount transmitter with threaded sensor.
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.
Seal the nipple and adapter threads with silicone tape.
3. Screw the sensor into the thermowell. Install drain seals if required
for severe environments or to satisfy code requirements.
4. 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.
b) Ensure the transient protector power leads are adequately
secured under the transmitter power terminal screws.
c) Verify the transient protector’s ground wire is secured to the
internal ground screw found within the universal head.
Note
The transient protector requires the use of an enclosure of at least
3.5-in. (89 mm) in diameter.
5. Pull the sensor wiring leads through the universal head and
transmitter. Mount the transmitter in the universal head by
Quick Start Guide April 2019
14 Rosemount 644H and 644R