Siemens Pacemaker UM344-2 Manual do Utilizador descarregar pdf (Página 56)

INSTALLATION UM344-2

September 1995

4.4.3 Direct Mounting to Process

The Transmitter can be mounted directly to the point of measurement and supported by the thermowell,

extension fittings, and probe assembly.

IMPORTANT

It is recommended that high temperature anti-seize compound be applied

to the threads of thermowells, extension nipples, union connectors, and

sensor assemblies.

Refer to Figures 4-7 and 4-8 and the following for mounting guidance:

1. Unscrew the thermowell from the Sensor Assembly. Refer to the thermowell manufacturer's

installation literature and install the thermowell at the measurement point.

2. Screw onto the thermowell the extension nipple and union (if any).

3. If required, install insulation around the surface area of the measurement point to limit the effects of

heat radiating from the chamber, vessel, or pipe containing the process material.

4. Insert the probe assembly through the extension nipple (if present) and seat into the thermowell.

Screw the probe nipple into the union (if present) or into the thermowell.

5. If it is desired to have terminal compartment access from the same direction as the Sensor Assembly,

then screw an elbow-plus close nipple-plus coupling onto the probe nipple. See Figure 4-7.

6. Select one of the two conduit inlets and route the sensor leads extending from the probe into the

terminal compartment of the transmitter. Do not connect the wires.

7. Screw the transmitter onto the threads of the probe's nipple or elbow fitting (if used).

8. Refer to Section 4.5 to connect the sensor wires to the appropriate terminals.

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Siemens Pacemaker UM344-2 Manual do Utilizador Página 56