19
3 Operation
3.2.4
Plants
The measuring mode can be changed for the
Plants
application
via this menu item.
Area of use
– Measuring minimal gas concentrations in freely accessible
gas pipes and systems (e.g. gas pipes on bridges, above-
ground inverted siphons, biogas plants)
– Locating the source of gas
– Finding leaks
Symbol
Unit
–
ppm (parts per million)
– % vol.
Measuring range
Gas-sensitive semiconductor
0 to 10,000 ppm
Infrared sensor
0.1 to 100 % vol.
Measurement data display
PPM
CH4
8
0,1
1,0
0
10
100
10
100
– Digit, for example,
8 ppm CH
4
– Bar graph with quasi-loga-
rithmic scale
Fig. 8: Plants measuring mode
