INFICON VGC401 Single-Channel Controller - Manual (Page 53)

tinb01e1-f (2011-07) VGC401.om
53
Test of channel 1 of the analog/digital converter (with a
reference voltage at the signal input of the SENSOR
connector (
→  23)).
The measurement value filter affects the applied
voltage. If the signal input is open, the VGC401
displays a default value that may easily fluctuate
because of the high sensitivity of the open
measurement circuit.
Test sequence
e.g.:
Ö Negative portion of the meas-
urement signal in Volt.
Test of channel 2 of the analog/digital converter (with a
reference voltage at the signal input of the SENSOR
connector (
→  23)).
The measurement value filter affects the applied
voltage. If the signal input is open, the VGC401
displays a default value that may easily fluctuate
because of the high sensitivity of the open
measurement circuit.
Test sequence
e.g.:
Ö Gauge identification voltage
Ö No gauge connected
A/D converter test 1
A/D converter test 2