VACUUM LEAK DETECTOR
VLR ..
and
VLR .. MV
20/05/2020
- 16 -
The pressure increase is indicated visually and acoustically (pressure
build-up alarm).
For the version up to 90 bar (additional pressure switch and solenoid
valve), the additional pressure switch is actuated in the case of a fast
pressure increase, which immediately closes the solenoid valve to
protect the leak detector from inadmissably high pressures. The pres-
sure build-up alarm is triggered; if the additional pressure switch is
connected via the probe contacts, the probe alarm is also shown.
4.6 Displays and Controls
4.6.1 Display
4.6.2 Function “Turn off audible alarm signal”
Briefly press “Sound off” key once; audible signal turns off, and the
red LED flashes.
Pressing the key again will turn the audible signal on.
This function is not available during normal operating conditions and
malfunctions.
1
(Flashing) is active for the acknowledged external signal.
2
The “Sound off” key does not have a function, which means the audible signal cannot be turned off.
Indicator
light
Operating condition
Alarm vacuum below
“A
la
rm
O
N
”
Probe alarm
Solenoid val
ve mal-
function
Pressure bu
ild-up
alarm
Malfunction
Tightness a
larm T
OPERA-
TION:
green
ON ON ON ON ON
ON ON
ALARM:
red
OFF
ON
(Flash-
ing)
1
OFF
ON
(Flash-
ing)
ON
(Flash-
ing)
ON
2
ON
(Flash-
ing)
1
ALARM 2:
yellow
OFF OFF
ON
(Flash-
ing)
ON
Flash-
ing
OFF
ON
(Flash
es
twice)
Design and Function