Alcatel ASM 180 TD User Manual page 130

S
YMPTOM
High background noise
2/2
Helium measurement problem
C
AUSE
Leak inside the detector
Leak visible during a Helium
leak check.
NO
Vacuum line contamination
The lines are dirty or greasy
NO
High triode gauge pressure
Analyzer cell degassing time
too short
NO
Cell contamination
The cell is dirty and polluted
NO
Ultimate pressure of Jauge PI1
MD4E or CP20 défectueuse
The dry roughing pump is
defective
NO
Alcatel Vacuum Technology France - ASM 180 TD/TD+ - ASM 181 TD+ User's Manual
D 110
R
EMEDY
Eliminate the leak
Clean with alcohol or
replace them if necessary
Wait for a spectro
-4
pressure < 10 mbar
Clean and recondition
( see E 10 )
Contact customer service
Contact customer service