Gasman Maintenance and Calibration
25
Gas flow rate
It is important that the flow rate is set correctly as otherwise pressure
effects may distort calibration values and prevent the gas detector from
working correctly. To calibrate Crowcon portable detectors the flow
rate should be set between 0.8-1.0 litres/minute (0.03-0.04 cubic feet/
minute).
Normal safety precautions for handling ozone should always be observed
along with any special instructions that accompany the calibration gas
cylinder or generator being used.
The standard flow plate should be used to supply gas at the flow rate
stated above.
If required your local Crowcon representative or service centre will be able
to provide further advice.
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