Max. zeroing (long press)
Zero current reading, up to 250 ppm
can be suppressed. Symbolized by an
arrow pointing downwards on the
display.
7.2 Carrying out a function test
Apply low-concentration gas to the sensor (max. 10 sec).
If the sensor does not respond (no alarm), the instrument is defective
and must no longer be used. The instrument must be taken to the
service centre for repair.
Due to the selectivity of the sensor, gas equivalents are not suitable for
checking the function and especially not for calibrating the sensor.
7.3 Carrying out gas detection
Destruction of the sensor due to external influences!
- Do not expose the sensor to high concentrations of
H2S (hydrogen sulphide), SO
x
(sulphur dioxides), Cl
2
(chlorine), or HCl (hydrogen chloride).
- > Prevent alkaline materials or water from coming into
contact with the sensor.
- > Do not expose the sensor to moisture or frost.
Have the instrument serviced annually by the manufacturer.
Testing natural gas lines or hydrogen lines:
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