Mount The Transmitter - Emerson Rosemount 644R Quick Start Manual

Quick Start Guide

4.0 Mount the transmitter

Mount the transmitter at a high point in the conduit run to prevent moisture from
draining into the transmitter housing.
4.1 Typical connection head installation
Head mount transmitter with DIN plate style sensor
1. Attach the thermowell to the pipe or process container wall. Install and
tighten the thermowell before applying process pressure.
2. Verify the transmitter failure mode switch.
3. Assemble the transmitter to the sensor. Push the transmitter mounting
screws through the sensor mounting plate and insert the snap rings (optional)
into the transmitter mounting screw groove.
4. Wire the sensor to the transmitter (see
more information).
5. Insert the transmitter-sensor assembly into the connection head. Thread the
transmitter mounting screw into the connection head mounting holes.
Assemble the extension to the connection head. Insert the assembly into the
thermowell.
6. Slip the shielded cable though the cable gland.
7. Attach a cable gland into the shielded cable.
8. Insert the shielded cable leads into the connection head through the cable
entry. Connect and tighten the cable gland.
9. Connect the shielded power cable leads to the transmitter power terminals.
Avoid contact with sensor leads and sensor connections.
10. Install and tighten the connection head cover. Enclosure covers must be fully
engaged to meet explosion-proof requirements.
A
D
A. Rosemount 644H Transmitter
B. Connection head
C. Thermowell
8
B
E
"Wire and apply power" on page 12
C
F
D. Transmitter mounting screws
E. Integral mount sensor with flying leads
F. Extension
June 2016
for