M&C TechGroup SP3200 Operator's manual User Manual
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Gas sampling and gas conditioning technology
2-1.3.9-ME
The gas sample probe with preliminary filter and internal filter must be checked for tempera-
ture and dust deposits in suitable intervals of time depending on the process conditions. Dust
layers of more than 5 mm must be removed immediately. The filters must be checked for dam-
age and replaced if necessary. Also remove the dust deposits under the cover.
The probe must be shut down when the respective maximum surface temperature is exceeded.
The system and process-specific safety measures must be observed for all maintenance work.
Maintenance intervals cannot be recommended. They must be determined on site depending on the specific
application and process conditions. An indication of the need for maintenance work on the probe can be a
steady decline in the sample gas flow to the analyser system.
15.1 REPLACEMENT OF THE FILTER ELEMENT
Maintenance of the probe is mainly limited to replacement of the filter elements and inspection of the seals
and gaskets. For this:
Remove the protective cover after opening the toggle-type fasteners.
Dismount the filter holder part (see figure 3).
Unscrew the filter thumb screw and replace the filter element.
Inspect the filter element seals and replace them if necessary.
Inspect the flat graphite gasket or Viton gasket in the cover and replace if necessary.
Clean the filter chamber.
Insert the filter holder part again and tighten hand-tight.
Fit the protective cover.
Possibly necessary spare gaskets must be out of graphite or Viton.
15.2 REPLACEMENT OF THE PRELIMINARY FILTER
The complete probe unit must be removed from the process before replacing the preliminary filter. The pre-
liminary filter can, depending on the type and degree of contamination, be cleaned mechanically or in an
ultrasonic bath and is then reusable.
15.3 CLEANING OF THE PROBE
The gas sample probe must be inspected at suitable intervals in time. Dust layers of more than 5 mm must be
removed immediately. The dust deposits under the cover must also be removed.
To prevent static charging, the probe should always be cleaned with a moist cloth.