Emerson Rosemount 644h Instrukcja Obsługi Pobierz pdf (Strona 16)

2-6

Rosemount Inc

Head Mount Transmitter with Threaded Sensor

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 steps as described below.

1. Attach the thermowell to the pipe or process container wall. Install and

tighten thermowells before applying pressure.

2. Attach necessary extension nipples and adapters. 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. Set the transmitter failure mode switch (see Figure 2-11 on page 2-11).

5. Pull the sensor wiring leads through the extensions and adapters into the

universal head. Mount the transmitter into the universal head by threading

the transmitter mounting screws into the universal head mounting holes.

6. Mount the assembly into the thermowell. Seal adapter threads with

silicone tape.

7. Install conduit for field wiring to the conduit entry of the universal head.

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

and terminals.

8. Pull the field wiring leads through the conduit into the universal head. Attach

the sensor and power leads to the transmitter. Avoid the contact with leads

and terminals.

9. Install and tighten the universal head cover. Enclosure covers must be fully

engaged to meet explosion-proof requirements.

Figure 2-5. Typical Model644H Transmitter Mounting Configuration Using

Threaded Style Sensor and Assembly

644-0000A04A

Standard Extension

Threaded

Thermowell

Universal Head

Threaded Style Sensor

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Emerson Rosemount 644h Instrukcja Obsługi Strona 16