3 Operation
│
13
3.2.4
Gas measuring
The measuring mode can be changed to the
Gas measuring
application via this menu item.
If the device is already in the
Gas measuring
application, you
can access an overview of detectable gases via this menu item.
The device automatically returns to measuring mode.
Area of use
– Measuring the composition of biogas
– Proof of absence of gas in gas pipes
Symbol
Measuring range
Infrared sensor
(Methane CH
4
)
0.0 to 100 % vol.
Infrared sensor
(Carbon dioxide CO
2
)
0 to 100 % vol.
Electrochemical sensor
(Oxygen O
2
)
0.0 to 25.0 % vol.
Electrochemical sensor
(Hydrogen sulphide H
2
S)
Multitec
545
: 0 to 5000 ppm
Multitec
540
: 0 to 2000 ppm
Electrochemical sensor
(Carbon monoxide CO)
0 to 500 ppm
Measurement data display
VOL%
VOL%
VOL%
PPM
PPM
0.0
0
20.9
0
0
CH4
CO2
O2
H2S
CO
– Figure, e.g.
0.0 % vol. CH
4
0 % vol. CO
2
20.9 % vol. O
2
0 ppm H
2
S
0 ppm CO
Fig. 8: Gas measuring mode
