18
3 Operation
3.2.4
Enclosed spaces application
The
Enclosed spaces
application is used to measure gas con-
centrations in enclosed spaces where there is increased potential
of gas dispersal.
Measurement unit:
ppm (parts per million)
% vol.
Measuring range:
Semiconductor
0 to 10,000 ppm
Thermal conductivity
0.1 to 100 % vol.
Signals (methane CH
4
):
Audible
No signal
Visual
Flashing
increasing from 4,400 ppm
(AL1) to 22,000 ppm (AL2)
Continuously On
2.2 % vol. and greater (AL2)
