Replacement Of The Moisture Sensor Assembly; Figure 23 Ribbon Cable Connection - Michell Instruments Promet EExd User Manual

Promet EExd User's Manual
Always keep the bayonet fittings lightly lubricated. If required, the user interface can
be fully disconnected from the instrument by disconnecting the ribbon cable connection
to the main processor PCB.
4.2

Replacement of the Moisture Sensor Assembly

1. Isolate the incoming sample gas line by CLOSING the sample inlet
isolation valve and allow the system to depressurize. Isolate the power
and observe the de-energize duration.
2. Remove the enclosure window and mount the user interface (see
Section 4.1).
3. Using a 2.5mm hex key remove the M3 cap head screw (1 in Figure 25)
securing the water sensor assembly to the stay bracket.
4. Restrain the sensor assembly.
remove the 2 off 1/8" water dew-point sensor sample pipe connections
(2 in Figure 25).
Michell Instruments
Figure 23 Ribbon Cable Connection
All of the procedures below can only be carried out by
first unscrewing the enclosure glass cover and removing
the user interface assembly.
The power to the enclosure must be turned off before
any work is carried out in the measurement system
enclosure. Observe de-energize durations.
Use a 11mm spanner to loosen and
MAINTENANCE
29