3 channels, 1 sensor connections, 2 sensor supply – INFICON VGC403 Three-Channel Measurement and Control Unit User Manual
Page 8: 3 measuring technique, 4 switching functions, Channels, Sensor connections, Sensor supply, Measuring technique, Switching functions

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tinb07e1-e 2011-07 Vacuum Gauge Controller
2.3 Channels
2.3.1
Sensor connections
2.3.2
Sensor supply
2.3.3
Measuring technique
NOTE:
The measurements of the BPG/BCG/HPG/CDGxxxD
are transferred digitally.
2.4 Switching functions
Number of channels
VGC402: 2
VGC403: 3
Sensor connections per
channel
RJ45 (FCC 68)
D-Sub, 15 pins, female
(connected in parallel)
Compatible sensors
Pirani:
PSG400, PSG400-S,
PSG100-S, PSG101-S,
PSG500, PSG500-S,
PSG502-S, PSG510-S,
PSG512-S, PSG550,
PSG552, PSG554
Pirani / Capacitance:
PCG400, PCG400-S,
PCG550, PCG552, PCG554
Cold cathode:
PEG100
Cold cathode / Pirani:
MPG400, MPG401
Capacitance:
CDG025, CDG025D,
CDG045, CDG045D,
CDG100, CDG100D,
CDG160D
Hot ionization / Pirani:
BPG400, BPG402
HPG400
Hot ionization / Pirani /
Capacitance: BCG450
Voltage
+24 VDC ±5 %
Current
500 mA
(750 mA short-time)
Fuse
900 mA via PTC element
Self-resetting after switching
the unit off or unplugging the
sensor.
The supply meets the
requirements of a ground
protective extra low voltage
(SELV).
Measuring ranges
Sensor dependent
Error of measurement
Gain error:
≤ 0.005 % FS
Offset error:
≤ 0.01 % FS
Measuring rate
50 s
-1
Display rate
10 s
-1
Filter time constant
Slow:
Approx. 1.0 s (f
g
= 0.16 Hz)
Normal (nor):
Approx. 0.3 s (f
g
= 0.53 Hz)
Fast:
Approx. 0.06 s (f
g
= 2.65 Hz)
Unit of measurement
mbar, Pa, Torr, Micron
Possible adjustments
Linear sensors (CDG):
Zero-adjust
Logarithmic sensors (PSG,
PCG, PEG, MPG, BPG,
BCG, HPG):
Fixed correction factors for
N
2
, Ar, H
2
, or a variable cor-
rection factor in the range
0.10…9.99
A/D converter
Resolution > 16 bit
Number of switching
functions
VGC402: 4
VGC403: 6
Assignment
Can be configured any way
Delay time
Filter time constant depen-
dent
Adjustment range
Sensor dependent
Hysteresis
Linear sensors (CDG):
≥ 1
% FS
Logarithmic sensors (PSG,
PCG, PEG, MPG, BPG,
BCG, HPG):
≥ 10 % of measurement