Rae MultiRAE PLUS PGM-50, Руководство по эксплуатации и обслуживанию

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MAINTENANCE
7-7
7.3 PID Sensor Cleaning / Replacement
This section only applies to a monitor that is equipped with
the PID detector option. During the course of normal
operation, a film of gas vapor may build up inside the PID
sensor module and the UV lamp. The rate at which the film
develops depends on the type and concentration of the
vapors being sampled. As a guide, it is recommended to
clean the PID sensor module and lamp only when the PID is
malfunctioning.
The sensor module is made of several components and is
attached to the lamp housing unit as shown in Figure 7-2.
If the lamp does not turn on, the monitor will display an
error message of “Lamp” to indicate cleaning or replacing of
the lamp is required. Periodic cleaning of the lamp window
will also remove film deposits and restore lamp sensitivity.
Care must be exercised when cleaning the window
surface so that it will not be damaged.
1. Turn off power of Multi-gas Monitor.
2. Refer to Figure 7-1, open the monitor cover by
unscrewing the two case screws from the bottom of the
monitor case.
Disconnect the battery pack.
3. Refer to Figure 7-2, carefully unscrew four No. 2 screws
that hold down the gas piping plate to the analog PCB and
sensors. Remove the gas piping plate.