Setting The Switch-Point Adjustment - Endress+Hauser Liquicap M FTI51 Operating Instructions Manual

Commissioning
46
7.2.6

Setting the switch-point adjustment

∆c
If only one calibration (empty or full) was carried out, and if buildup forms on the rod
probe while the probe is in operation, the device can not longer respond to changes in
level. A switch-point adjustment (e.g. 4 pF, 8 pF, 16 pF, 32 pF) compensates for this
condition and ensures that you obtain a constant switch-point again.
For media that do not have a tendency to build up, we recommend a setting of 2 pF,
as the probe is most sensitive to changes in level at this setting.
For media with heavy buildup (e.g. plaster), we recommend using probes with active
buildup compensation.
A switch-point adjustment can be carried out only if a full or empty calibration has
been carried out first.
The switch-point adjustment is disabled if you switch on the two-point control
→  47.
Setting the switch-point adjustment
The factory setting is 2 pF.
To adjust the switch-point:
1 →
7 3
-
+
5
A0042483
4 →
7 3
-
+
5
> 2 s
A0042470
‣
Press the  key > 2 s to
increase the value.
2 →
1 3
7 3
-
+
5
A0042469
‣
Set the function switch to
position 3.
5 →
∆c
0 = 4 pF
7
3
-
+
5
A0042471
Liquicap M FTI51
3 →
∆c
0 = 2 pF
7 3
-
+
5
A0042817
6 →
7 3
-
+
5
> 2 s
A0042818
‣
Press the  key > 2 s to
increase the value.
Endress+Hauser