E 400
Basic maintenance of the analyzer cell
GB
00046
-
E
d
it
io
n
07
-
J
une
08
Symptoms and
probable cause
Remedy
Filament does not light
g
Gross leak
g
Check the torque of the screws of the analyzer cell, sealing surface
(spray helium to check it) and elastomer seal status.Change it if
necessary.
g
Electrical short circuit
g
Check electrical connections on the sub-D 15 pin male plug J2
located on the top of the analyzer cell. Dismantle and relocate
correctly the internal wires and/or connections.
g
Check the status of the filament by measuring the resistance of the
filament (connect points A and B of the filament).
1
8
9
15
J2 sub-D male plug
J2 plug
Pins
functions
corresponding
feed-throughs
2 to 6
Ground
-
8
Filament 1 point B
2
12
Filament 2 point A
4
13
Filament 2 point B
5
15
Filament 1 point A
1
Auto-calibration failure
(refer to defect message displayed)
g
Lack of sensitivity
g
Check filament alignment.
g
High background: internal
g
Let the leak detector run until you have a stable signal for the
degassing and starting another auto-calibration.
Note: A low background gives a more accuracy measurement.
g
High background: leak
g
Spray helium around the sealing surfaces.
8/8
Содержание ASM 142
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Страница 315: ...G 201 Wiring diagrams ASM 142 D index 1 2 ...