Inficon Gemini MPG500

44 tina83e1-d (2018-12)
 Using an ohmmeter, make following measurements on the
contact pins.
Measurement
between pins
Possible cause
1 + 4 39.5 … 40.5 Ω
(at 20 °C)
Values
outside of
the range
Pirani filament
rupture
1 + 2 1000 … 1100 Ω
(at 20 °C)
Values
outside of
the range
Pirani tempera-
ture sensor
rupture
5 + measuring
chamber
∞ <<∞ Contamination,
short circuit cold
cathode
1
2
3
4
5
Measuring chamber
All of theses faults can only be remedied by replacing the
complete measuring chamber (
→  50).
 We recommend to perform a leak test (leak rate
<1×10
-9
mbar l/s).
6.2.2 Replacing Ionization Chamber and Ignition Aid
Precondition
Troubleshooting (measuring chamber) performed (→  42).