Siemens SIPROCESS GA700 - Checking the OXYMAT 7 for Leaks

Commissioning
7.5 Checking gas paths for leaks
Quick Start
Compact Operating Instructions, 05/2018, A5E31805656-06
81
Test setup for leakage test
To check for leaks, we recommend the test setup shown below:
①
Shut-off valve
②
Pressure regulator
③
Manometer (gauge pressure)
1
Sample gas inlet
2
Sample gas outlet
3
ULTRAMAT 7: Unscrewing blanking plugs
4
OXYMAT 7 / ULTRAMAT 7: Unscrewing blanking plugs
Figure 7-2 Recommended test setup to check for leaks
7.5.3
Checking the 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 th
e
meas
uring 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.