20/05/2020
VACUUM LEAK DETECTOR
VLR ..
and
VLR .. MV
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4.6.3 “Testing the optical and audible alarm signal” function
Press and hold the “Sound off” key (for about 10 seconds). The alarm
will be triggered until the key is released.
This inquiry is only possible if the pressure in the system has exceed-
ed the “Alarm OFF” pressure.
4.6.4 “Tightness inquiry” function
Press and hold the “Sound off” key until the signal lamp is flashing
rapidly, then release it. The display (103) will show a tightness value
and the same value will be indicated by the number of “Alarm” signal
lamp flashes.
This display disappears after 10 seconds and the current vacuum in
the system is displayed again.
For the tightness inquiry function, the leak detector must have per-
formed at least 1 automatic refilling interval in normal operating condi-
tions (i.e., without external filling/evacuation, e.g., by an assembly
pump) to achieve a valid statement.
This inquiry is recommended before performing a regular functional
check of a leak detector. In this way, it is possible to estimate imme-
diately whether it is necessary to look for leaks.
Number of flash signals
Assessment of tightness
0 Very
tight
1 to 3
Tight
4 to 6
Sufficiently tight
7 to 8
Maintenance recommended
9 to 10
Maintenance urgently recommended
The smaller the above value, the tighter the system. The significance
of this value also depends on temperature fluctuations and should
thus be considered a reference point.
Design and Function
(103)