INFICON Gemini ATM to Ultra-High Vacuum Gauge - Manual (Page 43)

tina83e1-a (2014-02) 43

Using an ohmmeter, make following measurements on the
contact pins.
Measurement
between pins
Possible cause
1 + 4 ≈40 Ω >>40 Ω Pirani filament rupture
(MPG50x only)
1 + 2 ≈1078 Ω
at 20 °C
>>1078 Ω
at 20 °C
Pirani temperature
sensor rupture
(MPG50x only)
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 (
→  45).

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 ( →  41).

Due to contamination remove the ignition aid with the
removing tool (Accessories →  53).