Pfeiffer TPG 261 - Page 36

36
BG 5195 BEN / A (2011-05) TPG261.oi
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 below these values, the upper threshold
is automatically adjusted to a minimum hystere-
sis. 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 TPG 261 automati-
cally adjusts the threshold if
required.
+10% lower threshold
lower threshold
1500
1×10
-2
1000
+10% lower threshold
+10% lower threshold
+10% lower threshold
1000
all values in mbar, CAL=1
upper thershold limit lower threshold limit
1×10
-2
+10% lower threshold
1000+10% lower threshold
F.S.
+1% measurement
range (F.S.)
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. This prevents unstable states.
Limits of the upper
switching thresholds