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Ventilation diaphragm (for VG versions only)
The diaphragm used for ventilation generally requires no maintenance.
The ventilation function of the diaphragm is impaired by matter adhering to or contami-
nating the ventilation aperture, or by contact between the diaphragm and solvents, to
such an extent that it may be necessary to replace the diaphragm. Test measurements
are carried out to verify the pressure compensation function.
Tip:
If blowing into the ventilation element during online measurements causes the value to
change visibly, the ventilation diaphragm is in proper working order.
Moisture absorber cartridges (optional)
The condition of the moisture absorber cartridge can be determined from the coloration
of the granulate. Blue = granulate is dry, pink = granulate is moist.
The granulate can be regenerated for re-use. To do this, pour the granulate from the
cartridge into a suitable container and dry it for 1 hour at 210 °C. The granulate releases
moisture into the surrounding environment and takes on a blue color again. After drying,
the granulate should be poured back into the absorber cartridge while it is still warm.
Note:
The color of the granulate is less marked after regeneration than before because
the indicator inside the granulate particles migrates.
Input
ambient pressure
Moist granulate = pink
Dry granulate = blue
Ventilation-DCX
