Description
17.10.2019 31 / 96
The deformation behaviour of the watch is continuously recorded
during pressure build-up and automatically included in the evaluation
algorithm.
Deformation Deformation
Test pressure Test pressure
Linear deformation behaviour Non-linear deformation
behaviour
Automatic measuring time
The ProofMaster has a new evaluation algorithm which detects elastic
deformation of watches and automatically compensates them.
In the standard setting, the ProofMaster automatically determines the
required measuring time for each measurement. The software continues
the measurement until a meaningful result is obtained.
The measurement time for a simple OK/not OK statement is shorter
than the output of a precise leak rate. It should also be noted that
smaller limits lead to longer measurement times. The maximum time per
test pressure is limited to 300 seconds with automatic measuring time.
For best results in terms of precision and test duration, we recommend
the use of the automatic measurement time.
4.6 Definitions
Deformation measurement
The measuring method of the ProofMaster is based on the principle of
deformation. The watch is subjected to positive pressure to compress
the watch housing, or a vacuum to expand it. The faster the
deformation is compensated, the larger the leak in the watch case. The
deformation of the case within a certain time serves as the basis for the
measurement to determine whether the watch is leakproof or not.
Leak-tight watch
Under constant pressure, the deformation of the watch housing remains
constant.
Leaky watch
Under constant pressure, the deformation of the watch housing is
reduced.
The difference between the pressure in the test chamber and the
pressure in the watch housing is being compensated at a rate which is
above the limits of the leak rate.
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