Operation
The PVTS can be conveniently carried to
the device under test (DUT) in its case.
The capacitance manometer should be
connected to the vacuum system, as
close to the DUT as possible, and its
power supply/display connected to a
suitable mains supply (mains cable and
3m interconnecting cable supplied).
Where possible, absolute pressure
standards should be pumped below their
resolution and zeroed, differential
pressure standards should be cross
ported and zeroed. After allowing the
standard to warm up and stabilise it can
then be compared against the DUT at
various points through its range. After use
the standards isolation valve should be
closed before venting the vacuum system.
It can then be removed and stored under
vacuum in its case.
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