Gasman Maintenance and Calibration
23
VII. Maintenance and Calibration
Gasman is designed to operate almost maintenance free under most
conditions. However, some small items of routine maintenance are
recommended.
General
To keep the display panel and operator button free from dirt build up,
regularly wipe over your Gasman unit with a damp cloth.
Filter
Inspect the front filter at regular intervals for dirt or damage. Clean as
necessary.
Zero and calibration
Gasman is supplied with an Autozero function on start-up. This function
can be configured to operate automatically, on user confirmation (see
quick start guide), or can be disabled. This configuration can be set with
the Crowcon Portables PC software, see section VIII. Gasman also has a
Zero function in the menu, see section 2.4.
Crowcon recommends a monthly gas test to confirm sensor operation.
However, please check with your own Health and Safety regulations.
A test gas of known composition needs to be applied to verify sensor
response and alarm function, see section 6.1.
Instrument calibration of sensor should be performed at 6 month regular
intervals.
Calibration method
Gasman calibration can be performed using the Gas Test Kit as per 6.3
or with Crowcon Portables PC software and calibration gas mixtures.
Appropriate certified calibration gases should be used. Calibration gas is
applied using the appropriate flow cap. Refer to Crowcon Portables PC
software help file for further information.
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