Fisher 244ER, 244EH manual Rail Mount Transmitter with Threaded Sensor, 644-0000A04B

Rosemount Models 244EH and 244ER PC-Programmable Temperature Transmitters

Rail Mount Transmitter with Threaded Sensor

The least complicated assembly uses:

•a threaded sensor with flying heads

•a threaded sensor connection head

•a union and nipple extension assembly

•a threaded thermowell

Refer to Volume 1 of the Rosemount Sensors Product Data Sheet (document number 00813-0100-2654) for complete sensor and mounting accessory information.

To complete the assembly, follow the procedure described below.

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 (see Figure 2-13 on page 2-16).

10. Attach the sensor and power leads to the transmitter. Avoid contact with leads and terminals.

Figure 2-8. Typical Rail Mount
Transmitter Mounting Configuration
Using Threaded Style Sensor	Rail Mount	Threaded Sensor		Standard
and Assembly
	Transmitter	Connection Head
			Extension

Threaded	Threaded
Style Sensor	Thermowell

644-0000A04B

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