Checking Oxymat 7 For Leaks - Siemens SIPROCESS GA700 Operating Instructions Manual

9.6.3

Checking OXYMAT 7 for leaks

Procedure: Devices with pipes
1. Close the reference gas inlet.
2. Connect a pressure measuring instrument (manometer) to the sample gas outlet.
3. Carefully apply pressure of approximately 3 000 hPa (absolute pressure) to the measuring
inlet.
4. Then shut off the measuring inlet.
5. Wait for approximately 5 minutes until the test gas that flowed in has reached the ambient
temperature and the pressure remains stable.
Note the pressure.
6. Wait an additional 5 minutes and note the pressure again.
If the pressure change is less than 5 hPa, the sample gas path is adequately tight.
This value is based on the tare volume of the measuring module 7 ml and the volume of the
pressure measuring device of 23 ml.
Procedure: Devices with hoses
1. Close the reference gas inlet and, for versions with an external reference gas pump, also the
bypass outlet.
2. Connect a pressure measuring instrument (manometer) to the sample gas outlet.
3. Carefully apply pressure of approximately 1 500 hPa (absolute pressure) to the sample gas
inlet.
4. Then close the sample gas inlet.
5. Wait for approximately 51 minutes until the test gas that flowed in has reached the ambient
temperature and the pressure remains stable.
Note the pressure.
6. Wait an additional 5 minutes and note the pressure again.
If the pressure change is less than 28 hPa, or for variants with external reference gas pump under
34 hPa, the sample gas path is adequately tight.
This value is based on the tare volume of the measuring module 7 ml and the volume of the
pressure measuring device of 23 ml.
Rack-mounted device
Operating Instructions, A5E31874006-12
Commissioning
9.6 Checking gas paths for leaks
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