INFICON VGC401 Single-Channel Controller - 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.