Emerson Process Management 644H Marine Instruments User Manual


 
Quick Start Guide
11
May 2014
Rail mount transmitter with threaded sensor
1. Attach the transmitter to a suitable rail or panel.
2. Attach the thermowell to the pipe or process container wall. Install and
tighten the thermowell before applying pressure.
3. Attach necessary extension nipples and adapters. 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. Screw the connection head to the sensor.
6. Attach the sensor lead wires to the connection head terminals.
7. Attach additional sensor lead wires from the connection head to the
transmitter.
8. Attach and tighten the connection head cover. Enclosure covers must be fully
engaged to meet explosion-proof requirements.
9. Set the transmitter failure mode switch.
10. Attach the sensor wires to the transmitter (see “Wire and apply power” on
page 12 for more information).
A. Rail mount transmitter D. Threaded style sensor
B. Threaded sensor connection head E. Threaded thermowell
C. Standard extension
A
D
E
C
B