31/10/2019
VACUUM LEAK DETECTOR
VLXE ..
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4. Design and function
4.1 Design
Interior view with:
18
Detonation flame arrester
20
Three-way valve in suction line
21
Three-way valve in measuring line
60 Vacuum
pump
69 Buzzer
75 Display
board
76
Main circuit board
91 Heater
102 Pressure
sensor
139 Membrane
keyboard
4.2 Normal
operation
The vacuum leak detector is connected to the interstitial space
through the suction, measurement and connection line(s). The under-
pressure generated by the pump is measured by a pressure sensor
and regulated.
When the operating underpressure (Pump OFF) is reached the pump
is switched off. Due to small leaks in the leak indication system which
are unavoidable, the underpressure will slowly start to fall. When the
Pump ON switching value is reached, the pump is switched on and
Design and function
75
20
21
76
60
18
69
102
91
139