VACUUM LEAK DETECTOR
VLXE ..
31/10/2019
- 34 -
7. Functional test and maintenance
7.1 General
(1) It can be assumed that the system will work correctly without any
problems if the leak detection system is installed correctly without
leaks.
(2) If the pump switches on frequently or runs continuously, this indi-
cates that leaks are present that must be rectified within a rea-
sonable time.
(3) If an alarm is triggered, locate and eliminate the cause quickly.
(4) The operator must check at regular intervals that the operating
lamps work properly.
(5) Disconnect the supply voltage to the leak detector whenever per-
forming maintenance and repair work on it. Check Ex. atmos-
phere, if applicable.
(6) Interruptions in the power supply are indicated by the "Operation"
signal lamp going out. The alarm signal is triggered via the float-
ing relay contacts if the contacts 11 and 12 have been used.
After the interruption in the power supply, the green leak detector
starts up again on its own and the alarm signal via the potential-
free floating contacts is removed (unless the pressure has
dropped below the alarm pressure during the power failure).
(7) IMPORTANT: For single-walled containers fitted with flexible leak
protecting lining, the interstitial space must never be depressur-
ized (the leak protecting lining coming together)!
(8) If the leak detector needs to be cleaned, a
moist
cloth should be
used (electrostatics).
7.2 Maintenance
o
Maintenance work and functional checks must only be performed
by qualified persons
9
.
o
Once a year to ensure functional and operational reliability and
safety.
o
Test scope according to section 7.3.
o
It must also be checked whether the conditions in sections 5 and 6
are satisfied.
o
Comply with explosion protection regulations (if required), such as
the German BetrSichV (or the Directive 1999/92/EC and the result-
ing laws in the respective member states) and/or others.
o
The housing lid may only be opened in the gas-free state.
o
As part of the annual functional check, the pump motor should be
checked for running noise (bearing damage).
9
For Germany: specialist company according to water legislation with expertise in leak detection systems
For Europe: authorisation by the manufacturer
Functional check and maintenance