Preamble
UM-23100B-U User manual ATEQ F CLASS Page 8/90
5. DIRECT MEASUREMENT, PRESSURISATION
FILL STABILIZATION TEST DUMP WAIT
The measurement cycle consists of 5 phases:
1 2 3 4 5
Start
Wait time Fill time
Stabilization
time
Test
time
Dump
time
Cycle
end
Start
cycle start
The wait
time
The time during which the sealing connections are made to the test
parts before the part is filled. The instrument may be fitted with the
optional automatic connector. This valve is controlled for the duration of
the cycle to enable the installation of the expandable joint connectors to
be checked
The fill time
Pressurisation of the test and reference parts. At the end of the fill time,
the ATEQ instrument checks the test pressure. If this is not correct, it
will signal a test pressure fault.
The
stabilization
time
The test and reference parts are completely cut off from the air supply,
but are pressurised to the test pressure level. Pressure and
temperature will then stabilise between the two parts which
communicate and act similarly. If the test pressure is incorrect (a large
leak on one of the volumes) the test pressure will drop rapidly, the
instrument will not move on to the test mode and will indicate a fault.
The test time
The test and reference parts are isolated from each other and the
pressure sensor measures the difference in pressure between them.
The signal is electronically assessed and displayed, the part is then
diagnosed as good or bad.
The dump
time
Return of the parts to the atmospheric.
Cycle end
Once the dump has been carried out, the instrument emits a cycle end
signal and the automatic connector valve (optional) is deactivated. This
valve can control one or more expandable connectors from the
beginning to the end of the cycle.