M&C TechGroup PSP4000-H_C_T Operator's manual - Manual (Page 15)

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Gas sampling and gas conditioning technology 2-2.1-ME
16 MAINTENANCE
It is difficult to give any recommendations as to a particular maintenance cycle. Depending on your
process conditions, a meaningful maintenance cycle must be elaborated for the specific application.
An indication that probe-maintenance may be necessary could be shown by a constant decline in the
amount of sample gas in the analysis system.
Probe maintenance is restricted essentially to replacing filter elements and checking seals.
A T T E N T I O N ! High surface temperatures! Wear protective gloves!
16.1 CHANGING THE FILTER ELEMENT
As far as possible, the filter element should be changed when the probe is cold.
A T T E N T I O N ! In case of a hot probe wear protective gloves when changing the filter
element.
To do this in the case of the PSP4000-H, screw off the black knob on the rear side.
In the case of the PSP400-H/C with sample-gas connection and PSP4000-H/C/T with temperature
measurement the dummy bolt on the rear side is first to be removed and the thermo-element drawn
out. Then loosen and remove the threaded connection's hexagon nut.
Now loosen the rapid coupling for the heated sample line holder by pressing down on the outside
coupling ring and draw the complete filter unit out of the heat-insulated protective casing.
Screw the screw-on sleeve off the filter head.
Screw off the filter element holder and replace the filter element.
Check the filter element seals and the O-ring at the filter head and replace if necessary.
Clean filter chamber.
Clean or rod through the sampling tube in order to remove any deposits.
Then re-assemble in reverse order.
17 SWITCHING OFF
Before switching off, i.e. switching off the heating, the probe should be flushed with inert gas or air in
order to avoid condensation of aggressive components from the process gas.