Operation Liquistation CSF48
168 Endress+Hauser
Start delay 0 to 9999 s
Factory setting
0 s
Operating mode="In range check", "Out of range
check","Above limit check" or "Below limit check"
Synonyms: pick-up and drop-out delay
Switch off delay
Delta value Settings
Depends on the measured
value
Operating mode="Change rate"
The slope of the measured value (MV) is monitored in
this mode.
An event is generated if, in the specified time frame
(Delta time), the measured value increases or drops by
more than the specified value (Delta value). If the value
continues to increase or drop so sharply afterwards, no
other event is generated.
Once the slope is back below the limit value, the alarm
status is reset after a preset time (Auto Confirm).
In the example given, events are triggered when the
following conditions
occur:
t
2
- t
1
< "Delta time" and MV
1
> "Delta value"
t
4
- t
3
> "Auto Confirm" and MV
2
< "Delta value"
t
6
- t
5
< "Delta time" and MV
3
> MV
Delta time 00:01 to 23:59
Factory setting
01:00
Auto Confirm 00:01 to 23:59
Factory setting
00:01
a0018100
Fig. 93: Rate of change
Path: Menu/Setup/Additional functions/Limit switches/Limit switches 1 to 8
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