Crowcon Gasman - Page 8

Unpacking Gasman
2
Warning: rechargeable units
Only charge the rechargeable Gasman Personal Monitor with a Crowcon
Gasman charger. Failure to comply could invalidate safety certification,
warranty and safety; and may result in permanent damage to the unit.
Non-rechargeable units.
Gasman uses a CR2 battery which can be easily field replaced. Ensure
only the correct types of battery are fitted to maintain compliance with
certification (see Battery check on page 1).
Gasman IR CO
2
Personal Single Gas Monitor
The Gasman IR CO
2
personal single gas monitor an infrared gas sensor
for CO
2
detection. This version of Gasman is not designed or certified
for use in a hazardous area, and the safety certification data in Section
X is not applicable. Operation and maintenance of the Gasman IR CO
2
is essentially the same as for other Gasman units but with the following
points to note.
CO
2
is present in ambient air at a background concentration of just under 400ppm (0.04%). In
any enclosed environment the ambient CO
2
concentration will increase as a result of respiration
and if the room is poorly ventilated concentrations well in excess of 1000ppm (0.1%) can
occur. CO
2
levels in the outdoor air will also be enhanced by any emitted CO
2
e.g. from vehicle
exhausts or boiler flues venting to atmosphere so it is normal to see fluctuating levels of CO
2
on
the display whether indoors or outside.