Siemens Set CEM CERT, Operating Instructions Manual, Page: 104 / 128

Service and maintenance
9.3 Eliminating the moisture alarm
Set CEM CERT
102
Operating Instructions, 06/2021, A5E34491309-12
9.3 Eliminating the moisture alarm
If there is moisture in the gas path downstream from the gas cooler, the built-in humidity
sensor responds, the sample gas pump switches off and a fault message is output. This
error can be corrected as follows:
1. Switch off the fuse of the sample gas pump.
2. Remove the gas lines downstream from the sample gas cooler.
3. Clean the removed gas lines or replace them with new lines.
4. Replace the filters in the section between the gas cooler and the analyzers.
5. Clean the components (e.g. flowmeter, humidity sensor, regulating valves) in this
section.
6. Reinstall the clean parts.
7. Check the new or cleaned system for leaks.
8. Acknowledge the fault message on the control panel display.
9. Switch on the fuse of the sample gas pump again.
9.4 Harmful substances in the condensate
WARNING
Harmful substances in the condensate
The condensate at the sample gas cooler or condensation trap can be corrosive,
depending on the composition of the sample gas (e.g.: through SO
2
, NO, H
2
S, HCl, etc.).
When you dip litmus paper into the condensate it will turn red.
• Wear protective clothing, protective goggles and protective gloves when handling the
condensate!
• Prior to its disposal, dilute the condensate with tap water until it turns neutral and
the litmus paper does not change color. Alternatively, you can also neutralize the
condensate with a weak sodium carbonate solution (Na
2
CO
3
).