Emerson 644 Typical North American Installation, Head Mount Transmitter with Threaded Sensor

Reference Manual

00809-0400-4728, Rev AA June 2011

Rosemount 644

Typical North American Installation

Head Mount Transmitter with Threaded Sensor

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.Pull the sensor wiring leads through the universal head and transmitter. Mount the transmitter in the universal head by threading the transmitter mounting screws into the universal head mounting holes.

5.Mount the transmitter-sensor assembly into the thermowell. Seal adapter threads with silicone tape.

6.Install conduit for field wiring to the conduit entry of the universal head. Seal conduit threads with silicone tape.

7.Pull the field wiring leads through the conduit into the universal head. Attach the sensor and power leads to the transmitter. Avoid contact with other terminals.

8.Install and tighten the universal head cover. Enclosure covers must be fully engaged to meet explosion-proof requirements.

ABD

	C
	E
A = Threaded Thermowell	D = Universal Head
B = Threaded Style Sensor	E = Conduit Entry
C = Standard Extension

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