SGB VLXE Ex M Series, Documentation

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VACUUM LEAK DETECTOR VLXE .. Ex M and VLXE .. Ex MMV
28/07/2020
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8. Malfunction (Alarm)
8.1 Alarm Description
If an alarm goes off, one must assume that there is an explosive va-
por-air mixture in the interstitial space. Take appropriate protective
measures.
(1) An alarm (vacuum loss) is indicated by the red “Alarm” signal
lamp lighting up and the sounding of the audible signal, if availa-
ble.
(2) Other alarms are indicated as follows:
Probe alarm: Yellow LED that flashes when the audible signal is
acknowledged.
Pressure build-up alarm: Yellow LED flashing, red LED on and
red LED flashing on acknowledgment of the audible signal.
(3) Close any shut-off cocks in the connection line between the in-
terstitial space and leak detector.
(4) Shut off the audible signal by activating the „Mute“ button, if
available.
(5) Inform the installation company.
(6) The installation company must detect the cause and correct it.
CAUTION: Depending on the tank/pipelines, there could be liquid
under pressure in the connection lines.
CAUTION: Do not depressurize the interstitial space in the tanks
with flexible leak protection lining (risk of collapse of the insert).
(7) Repairs to the leak detector (e.g. replacement of components)
may only be made outside the ex-area, or if suitable safety
measures have been meet.
(8) Perform a functional check as per 7.3.
8.2 Malfunction
In case of a malfunction, only the red signal lamp will light up in addi-
tion to the green signal lamp (yellow is off), and at the same time, the
audible signal cannot be acknowledged.
Solenoid valve malfunction (e.g., no power): Yellow LED lights up and
the red LED flashes.
8.3 How to Behave
The different alarms can be used for different automated reactions
(e.g., switching off pumps).
Inform the installation company. They need to find and rectify the er-
ror.
After repair a functional check must be conducted.
Malfunction (Alarm)