Fisher 244ER User Manual

2-8

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
and Assembly

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