Bacharach Gas Pup, Инструкция

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Instruction 55-9002 19
Gas Pup
The petroleum absorbing property of the activated charcoal filter is used
to detect petroleum based gases and vapors in the following way:
1. With a standard foam filter installed in the probe’s filter chamber,
take a gas sample and note the display indication.
2. Remove the foam filter and install in its place one of the small acti-
vated charcoal filter packs. See Figure 16.
Note: The charcoal pack will increase the response time of the
instrument. Therefore, draw a sample of gas through the instru-
ment for at least 60 seconds before taking a reading.
3. Take a second gas sample from the same area, and note if the indica-
tion is less than it was in Step 1. If the indication has dropped, this
means that the charcoal has probably absorbed petroleum vapors, and
that one cause of the lower indication is likely to be petroleum vapors.
WARNING: Following the use of a charcoal filter pack, the pack
should be removed from the probe and discarded. Otherwise,
the presence of combustible vapors may not be detected in
subsequent testing.
Figure 16. Charcoal Filter Pack
Operation