Ö gauge dependent – INFICON VGC401 Single-Channel Controller User Manual
Page 36
36
tinb01e1-f (2011-07) VGC401.om
lowe
r
thres
hold
limit
uppe
r
thres
hold
limit
all values in mbar, Cor = 1
1.5Ч10
3
5Ч10
2
1Ч10
-2
1Ч10
3
2Ч10
-3 *)
FSr
FSr / 1000
1Ч10
-9
1Ч10
-8
1Ч10
-10
1Ч10
-1
1Ч10
3
1Ч10
-6
1.5Ч10
3
2Ч10
-3 *)
1Ч10
-8
1Ч10
3
1Ч10
-8
5Ч10
-9
1Ч10
3
FSr
FSr / 1000
*)
2×10
-4
mbar, if PrE is activated (
→ 46)
The minimum hysteresis between the upper and
lower switching threshold is at least 10% of the
lower threshold or 1% of the set full scale value.
If the value of the minimum hysteresis drops be-
low these values, the upper threshold is auto-
matically adjusted. This prevents unstable
states.
Value
The upper switching threshold
(Setpoint high) defines the pres-
sure at which the switching func-
tion is deactivated when the pres-
sure is rising.
e.g.:
Ö
gauge dependent
(
→
table).
If another gauge type is con-
nected, the VGC401 auto-
matically adjusts the threshold
if required.