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8.3.7
Checking the sample gas path for leaks
Test conditions
Observe the following conditions before commencing with the leak test.
● Check the tightness with air or nitrogen (test gas) at the operating temperature.
● The tightness is determined using the pressure drop method. The magnitude of the
pressure drop is a measure of the tightness of the gas line.
Note
Gas path volume during the leak test
The procedure described below is based on a gas path volume of 10 ml. If you select a
larger volume, you must set a correspondingly smaller value for the maximum permissible
change in pressure.
Procedure
1. Close the reference gas inlet.
2. Connect the sample gas outlet to a pressure measuring instrument.
3. Apply a pressure of approximately 1200 hPa (absolute pressure) to the sample gas inlet.
Then close the measuring gas inlet.
4. Wait for approximately 1 minute until the test gas that flowed in has reached the ambient
temperature.
5. Note the pressure.
6. Wait approximately 5 minutes. Note the pressure again.
If the pressure change is < 10 hPa, the sample gas path is adequately tight.
Commissioning
8.3 OXYMAT 7
Field device
74
Operating Instructions, 05/2015, A5E35640463-02
Содержание SIPROCESS GA700
Страница 6: ...Inhaltsverzeichnis Feldgerät 6 Betriebsanleitung 05 2015 A5E35640463 02 ...
Страница 22: ...Allgemeine Sicherheitshinweise 2 9 Automatisches Reset Feldgerät 22 Betriebsanleitung 05 2015 A5E35640463 02 ...
Страница 64: ...Anschließen 6 5 Feldbediengerät Feldgerät 64 Betriebsanleitung 05 2015 A5E35640463 02 ...
Страница 66: ...Bedienen 7 1 Bedienen Feldgerät 66 Betriebsanleitung 05 2015 A5E35640463 02 ...
Страница 94: ...Technische Daten 10 3 Technische Daten OXYMAT 7 Feldgerät 94 Betriebsanleitung 05 2015 A5E35640463 02 ...
Страница 112: ...Index Feldgerät 112 Betriebsanleitung 05 2015 A5E35640463 02 ...
Страница 118: ...Table of contents Field device 6 Operating Instructions 05 2015 A5E35640463 02 ...
Страница 134: ...General safety instructions 2 9 Automatic reset Field device 22 Operating Instructions 05 2015 A5E35640463 02 ...
Страница 158: ...Installing mounting 5 3 Field module Field device 46 Operating Instructions 05 2015 A5E35640463 02 ...
Страница 176: ...Wiring 6 5 Field control unit Field device 64 Operating Instructions 05 2015 A5E35640463 02 ...
Страница 178: ...Operation 7 1 Operation Field device 66 Operating Instructions 05 2015 A5E35640463 02 ...
Страница 190: ...Commissioning 8 4 Commissioning the SIPROCESS GA700 Field device 78 Operating Instructions 05 2015 A5E35640463 02 ...
Страница 222: ...Appendix A 6 Returned delivery Field device 110 Operating Instructions 05 2015 A5E35640463 02 ...
Страница 224: ...Index Field device 112 Operating Instructions 05 2015 A5E35640463 02 ...