INFICON Gemini ATM to Ultra-High Vacuum Gauge - Manual (Page 12)

12 tina83e1-a (2014-02)
Fuse to be connected
1)
≤1 AT
High voltage in the measuring chamber
Ignition voltage
Operating voltage ≤4.5 kV
≤3.3 kV
Current in the measuring chamber
High current
Low current ≤500 µA
≤100 µA
Electrical connection
3Mxx-xxx-000x
3Mxx-xxx-010x
FCC 68, 8-pin
D-Sub, 9-pin
Sensor cable
FCC connector
D-Sub connector
8-pin, shielded
9-pin, shielded
Cable length (FCC only) ≤50 m (0.14 mm 2 /conductor)
Grounding concept → "Power Connection"
Vacuum connection – signal
common connected via 10 k Ω
(potential difference ≤16 V)
Supply common – signal
common conducted separately;
differential measurement is
recommended