Checking For Leaks - Siemens FIDAMAT 6 Operating Instructions Manual

Commissioning
4.2 Preparation for commissioning
Pressure influence
If measurement is conducted externally, the device performs an automatic pressure
correction. In the case of device-internal pressure fluctuations, a pressure compensation is
performed automatically.
4.2.3

Checking for leaks

Checking for leaks
After every maintenance task concerning the flame ionization detector (FID) or the gas path,
you must check for leaks in the device. Proceed as follows:
1. Connect the gas outlet to a relative pressure manometer (0 to 1000 hPa, resolution
1 hPa).
2. Generate an overpressure of approximately 750 hPa for about one minute and then stop.
3. Wait about 10 minutes until the pressure has equalized. Then record the pressure.
4. Wait another minute, and read off the pressure again.
If the pressure drop within one minute does not exceed 12 hPa, the gas path is sufficiently
tight.
Note
During the measurement, the gas path, including the FID, must have a constant
temperature.
Test conditions:
The specified pressures are relative pressures.
Calibration gas:
Synthetic air (sample gas path must not be contaminated)
Test pressure:
Operating pressure x 1.5 (operating pressure = 500 hPa)
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Operating Instructions, 03/2018, A5E00222135-03
FIDAMAT 6