Transmitter Installation - Emerson Rosemount 644 Quick Start Manual

Quick Start Guide
3

Transmitter installation

3.1 Mount the transmitter
Mount the transmitter at a high point in the conduit run to prevent
moisture from draining into the transmitter housing.
3.1.1 Head mount transmitter with DIN plate style sensor
installation
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 the thermowell before applying process
pressure.
3. Verify the transmitter failure mode switch position.
4. Assemble the transmitter to the sensor. Push the transmitter
mounting screws through the sensor mounting plate.
5. Wire the sensor to the transmitter.
6. Insert the transmitter-sensor assembly into the connection
head.
7. If using a cable gland, properly attach the cable gland to a
housing conduit entry.
8. Insert the shielded cable leads into the connection head
through the cable entry.
9. Connect the shielded power cable leads to the transmitter
power terminals.
Avoid contact with sensor leads and sensor connections.
10. Connect and tighten the cable gland.
11. Install and tighten the connection head cover.
6
a) Thread the transmitter mounting screw into the
connection head mounting holes.
b) Assemble the extension to the connection head.
c) Insert the assembly into the thermowell.
April 2023
Rosemount 644