Chapter 4,
Maintenance and Troubleshooting
Guidelines
Maintenance
The Aspirated Sampling Module requires minimal maintenance.
However, the filters need routine inspection and possible replacement.
It is good practice to have on hand replacement filters to minimize any
down time of your unit (see TABLE 4-2).
Filter Maintenance
Filter maintenance consists of visual inspection of the two filters,
end-of-line filter and the in-line filter which blocks water from entering
the pump module. When new, filters are white; when loaded with dust or
dirt, they normally turn dark in color. Visually inspect the two filters
periodically. The frequency of this inspection depends on the
environment; if the environment is extremely dirty or dusty, this
inspection should be done often.
End-of-line filters must be located so that they are not exposed to
liquids or steam. If liquids become entrapped within a filter, replace the
filter as it will interfere with proper operation of the unit.
4-1