16
3 Operation
3.2.3
House application
The
House
application is used to measure minute gas concentra-
tions in buildings and to locate the origin of the gas.
Measurement unit:
ppm (parts per million)
% vol.
Measuring range:
Semiconductor
0 to 10,000 ppm
Thermal conductivity
1 to 100 % vol.
Signals (methane CH
4
):
Audible
Intermittent tone
increasing from
0 to 22,000 ppm (AL2)
Continuous tone
2.2 % vol. and greater (AL2)
Visual
Flashing
increasing from 4,400 ppm
(AL1) to 22,000 ppm (AL2)
Continuously On
2.2 % vol. and greater (AL2)
