29
3 Operation
3.2.7
Structure
The measuring mode can be changed for the
Structure
applica-
tion via this menu item.
Area of use
– Measuring minimal gas concentrations in structures.
– Locating the source of gas
Symbol
Unit
–
ppm (parts per million)
– % vol.
Measuring range
Gas-sensitive semiconductor 0 to 10,000 ppm
Infrared sensor
0.1 to 100 % vol.
Electrochemical sensor
(carbon monoxide CO)
0 to 500 ppm
Measurement data display
PPM
CH4
4
0,1
1,0
0
10
100
10
100
PPM CO
0
– Digit, for example,
0 ppm CO 4 ppm CH
4
– Bar display with quasi-loga-
rithmic scale (for CH
4
)
Fig. 14: Structure measuring mode
