SGB VLXE Ex M Series, Documentation, Page: 16 / 56

VACUUM LEAK DETECTOR VLXE .. Ex M and VLXE .. Ex MMV
28/07/2020
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4.6.4 “Tightness inquiry” function
Press and hold the „Mute“ button until the signal lamp is flashing rap-
idly, 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 under normal operating
condition (i.e. without external filling, e.g. by an installation 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)