In a leak measuring device (relative pressure or differential pressure method), the measuring phase is the time interval over which the pressure drop is measured.
The duration of this interval is dependent on the test object and the limit values:
The larger the volume, the more time is needed to determine a discernible pressure drop.
The smaller the leak, the more time is needed to determine a discernible pressure drop.
The higher the desired measuring accuracy, the more time is needed to achieve a stable result.
In leak testing with the flow method, this phase corresponds to the time interval during which the flow rate, which directly reflects the leak rate, is read. The duration of the phase is very short and it has a negligible effect on the measurement results.