INFICON VGC403 Three-Channel Measurement and Control Unit - Manual (Page 8)

8
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