
Gas Pup
6 Instruction 55-9002
Operation
Operating Precautions
(Please Read)
To ensure that the gas sensor is properly zeroed at startup, the Gas Pup
must be turned on in fresh air (free of combustible gases or vapors).
Before using the Pup to detect gas, ‘bump test’ the instrument by apply-
ing a known concentration of gas to the instrument’s gas inlet port, and
then observing that the instrument responds to the applied gas in a
positive manner. The optional Response Check Gas bottle (P/N 51-1816) is
recommended for this purpose.
Calibrate the instrument about every 30 days to assure its accuracy. The
frequency of calibration, however, may change depending on how often
the instrument is used and the amount of gas that was sampled. Create a
maintenance log to keep track of when an instrument was calibrated, and
then use this log to help develop a calibration schedule. For example, an
instrument that fails its calibration after only being calibrated a single
time should be calibrated more often.
Avoid sampling leaded gasoline vapors, or gases or vapors containing
silicones or sulfur compounds. Tetraethyl lead, silicones, and sulfur
compounds can form contaminating compounds on the sensor element
(poison the sensor), with resulting loss in sensitivity.
Always purge the instrument with fresh air after completing a test. This
removes combustibles from the sensor chamber and prolongs the life of
the sensor.
Operation
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