Inficon VGC501 - Page 36

36 tina96e1-b (2016-12) VGC501_VGC502_VGC503.om
Value
SP1-CH I Configuring a switching function.
SP1-CH 1 I  Switching function 1 is assigned to
channel 1
SP1-CH 2 I  Switching function 1 is assigned to
channel 2
(VGC502/503 only)
SP1-CH 3 I  Switching function 1 is assigned to
channel 3
(VGC503 only)
SP1-CH DISABLED I  Switching function 1 is factory-deactivated
SP1-CH ENABLED I  Switching function 1 is always turned on
The lower and the upper threshold of a switching function are always
assigned to the same channel. The last assignment is valid for both
thresholds.
Value
SP1-L I The lower threshold (Setpoint low) defines the
pressure at which the switching function is
activated when the pressure is dropping.
e.g.: SP1-L 5.00-4 I  gauge dependent.
If another gauge type is connected, the
VGC50x automatically adjusts the switching
threshold if required.
SPx-L min. SPx-L max.
PSGxxx I
2×10
-3 *)
= SPx-H max.
PCGxxx I
2×10
-3 *)
PEG100/MAGxxx I
1×10
-9
MPGxxx I
1×10
-9
BPG400 I
1×10
-8
BPG402 I
1×10
-8
HPG400 I
1×10
-6
BCG450 I
1×10
-8
CDGxxx I
F.S. / 1000
CDGxxxD I
F.S. / 1000
all values in mbar, GAS=nitrogen
*)
2×10
-4
mbar if RNG-EXT (Pirani range extension) is activated (→  51)
The minimum hysteresis between the upper and lower switching
threshold amounts to at least 10% of the lower threshold (logarithmic
gauges) or 1% of the full scale value (linear gauges). The upper
threshold is if necessary automatically adjusted to a minimum
hysteresis. This prevents unstable states.
Configuring a switching
function
Limits of the lower switching
thresholds