D 400
Symptoms description
46
47
48
55
56
ASM
1
4
2
-
142
D
-
G
rap
h
D
+
GB
03978
-
E
di
ti
on
01
-
J
anua
ry
200
9
SYMPTOM
ORIGIN / DIAGNOSTIC
CONFIRMATION
REMEDY
No test cycle start at the test
chamber closing
Sensor disconnected: sensor light off
n
Check the sensor connection to the
-
test chamber and the board
High helium background signal
Ambient air helium contamination
(background OK when leak
detector placed in another room
or environment, free of helium
contamination)
Internal LDS plastic tube disconnected
(background decreases very slowly
when sniffer probe tip is blocked with
a finger)
Helium signal unstable
Ambient source of helium
contamination
50
Inconsistent Helium signal
Fine signal adjustment required
51
Temperature too low/ high
Ambient temperature sensor
52
Pump failure
Overheating
n
Clean ambient air
n
Repair LDS probe tube (tightness of
connectors) or change LDS probe
n
Check possible sources of helium
emission in the surroundings
Eliminate or isolate it
n
Make an external calibration in
sniffing mode
n
Make sure the leak detector is
used within ambient temperature
tolerance
n
Check the connections : unplug and
plug the cables on the P0326 board
and the pump
n
If the pump isn’t locked at starting,
the orange led on the P0326 lights
on after the simultaneous lighting
of the 3 leds during 3-4 seconds.
Recondition the pump or replace it.
-
G 400
-
C 303
A 800
-
E 740/E
747
53
Pump speed
P0326 switch is in running in
n
-
No noise from the rotary vane
pump
Abnormal noise from the rotary
vane pump
The exhaust pressure of the pump
is not correct (lower or equal to 5
mbar )
The exhaust valve has not opened
Leaks inside the leak detector
Greasing of the pump ball bearings to
be performed
Rotary vane pump power supply not
connected
Oil temperature lower than 10°C
n
Check the pump
n
Check the gross leak valve
n
Check the tightness of the
canalizations, valves, pumps and
cell (alcohol test or use of another
detector)
n
Regrease the pump ball bearings
n
Connect the rotary vane pump
power supply connector
n
Heat the pump body to
approximately 18°C
E 740
-
E 740
-
-
5/6
Содержание ASM 142
Страница 1: ...ASM 142 142 D ASM GRAPH GRAPH D GRAPH D HELIUM LEAK DETECTOR User s Manual ...
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Страница 315: ...G 201 Wiring diagrams ASM 142 D index 1 2 ...