Crowcon Gasman User Manual page 25

Gasman
Gasman gas test accessory kit
The Gas Test Accessory is a gas testing kit designed to enable gas testing
and one button calibration of your Gasman gas detector using a specially
formulated, high stability long life single gas mix. It can be used with
Gasman units having sensors for Flammable, Oxygen, Carbon Monoxide
and Hydrogen Sulphide gases.
6.1 Gas testing
Gas testing checks the sensor is responding within set limits to an applied
gas of known composition. This can be performed as often as desired, but
would usually be carried out each time the Gasman is issued for use. The
Gasman itself will determine Pass/Fail status for the gas test.
In order to perform successful gas tests ensure:
• The gas used has the correct gas concentration, and that it is
within the validity date specified by the supplier.
• The gas flow path is leak tight. It is important to check that the
flow cap is properly fitted to the Gasman unit, and the outlet
tubing is not restricted in any way, nor additional tubing length
used.
The Gas Test Accessory Kit comprises a gas cylinder containing the gas, a
'Trigger' regulator with interconnect tubing, a magnet - used to activate
Test mode, a flow cap to attach to the Gasman, and a vent line. The kit is
supplied in a convenient carry case. The Trigger regulator can be operated
in two ways: (1) squeeze and hold - allows gas flow as long as the lever is
held in, or (2) by lifting the lever - the flow is locked on.
6.2 How to perform a gas test
1. Ensure your Gasman unit is switched on and in normal operation.
2. Fit the flow cap onto the front of the sensor and attach the hose
from the Trigger regulator.
Attach the outlet hose to 'vent gas away' - do not extend this
hose and do not restrict or allow kinks.
3. Touch the magnet, vertically aligned onto the case, to the left
hand side of the display. Your Gasman unit will activate the Gas
Test and show 'TEST' on the display.
Gasman gas test accessory kit