Checking For Leaks - Siemens ULTRAMAT 6 Series Compact Operating Instructions

Commissioning
5.3 Checking for leaks
5.3

Checking for leaks

Checking the sample gas path for leaks
Carry out a leak test prior to commissioning or following each maintenance measure which
affects the sensor or the gas path. This is carried out as follows:
1. Connect the sample gas outlet to a relative pressure manometer (e.g. U-tube manometer
with measuring range 0 to 150 hPa, resolution 0.1 hPa).
2. Apply air to the sample gas inlet.
As soon as an overpressure of approx. 100 hPa has been reached (measure using manometer
at sample gas outlet), block the sample gas inlet.
3. Wait approx. one minute until the enclosed air has become adapted to its environmental
conditions. Then record the pressure.
4. Wait for a while and read the pressure once again. The gas path is sufficiently tight when the
pressure drop does not exceed a maximum value.
Different criteria are in effect for the parameters (wait time and pressure drop) listed in item
4 due to the different designs of the analyzers. You can find the relevant values for each
analyzer in the operating instructions of the respective unit.
Note
It must be guaranteed during this measurement that the temperature of the gas path and sensor
remains constant.
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Compact Operating Instructions, 01/2024, A5E45779144002-AB
Series 6 and ULTRAMAT 23