Checking Oxymat 7 For Leaks - Siemens 7MB3000 Series Operating Instructions Manual

Test setup for leakage test with ULTRAMAT 7 high-temperature
To check for leaks, we recommend the following test setup:
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Figure 9-6
9.6.5

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.
Wall-mounted device
Operating Instructions, 07/2023, A5E31930403-AB
4 3 2 1
Shut-off valve
Pressure regulator
Manometer (gauge pressure)
Sample gas inlet
Sample gas outlet
Unscrewing blanking plugs
Unscrewing blanking plugs
Recommended test setup for leakage test with ULTRAMAT 7 high-temperature
Commissioning
9.6 Checking gas paths for leaks
137