How to determine whether the capillary of a double-flange differential pressure transmitter is leaking silicone oil or has air in it?
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How to determine whether the capillary of a double-flange differential pressure transmitter is leaking silicone oil or has air in it? Is there anyone with experience in this area who could share it?
Generally speaking, oil leakage is more likely, while air ingress is generally difficult. In the event of oil leakage, it can be detected first by visual inspection, and secondly by drift in the measurement values, including the zero point, range, and actual measured values.
Just use soapy water for the airtightness test
The intake diaphragm bulges, and there is oil leakage as it loses its elasticity