78 GM32 · Technical information · 8011923 · V 1.4 · © SICK AG
Maintenance
Subject to change without notice
5.3.2 Manual test gas feeding
1 Switch the GM32 to Maintenance (on the operator panel or in SOPAS ET menu: GM32/
Maintenance/Operating mode switch
p. 56, §4.2.6.1)
2 Connect the desired zero and/or test gas via pressure reducer to the probe (
p. 76,
Fig. 16).
3 Set the pressure gauge (
p. 77, §5.3.1) to the primary pressure determined.
4 If no further measurements are to be made: Set the GM32 back into measuring opera-
tion (on the operating console or in SOPAS ET menu: GM32/Maintenance/Operating
mode switch).
5.3.3 Using mixed gases as test gases
Safe mixed conditions:
WARNING: Hazard through escaping gases
Hot and/or noxious gases can escape during work on the test gas connection,
depending on the equipment conditions.
Test gases may only be applied by skilled persons who, based on their tech-
nical training and knowledge as well as knowledge of the relevant regula-
tions, can assess the tasks given and recognize the dangers involved.
Material required
SOPAS ET
Instrument air or N
2
Pressure gauge / pressure reducer
Supply line 1/4" with Swagelok fitting
Determine the test gas pressure again when the pressure in the gas duct
changes.
Mixed gas Safe mixed gas conditions
SO
2
+ NO > 10% NO included in SO
2
SO
2
+ NO
2
> 10% NO
2
included in SO
2
NO + SO
2
> 10% SO
2
included in NO
NO + NO
2
1
1
As far as available
> 25% NO
2
included in NO
NO
2
+ SO
2
> 50% SO
2
included in NO
2
NO
2
+ NO
1
> 10% NO included in NO
2
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