Configuring Two-Point Control And Buildup Mode - Endress+Hauser Liquicap M FTI51 Operating Instructions Manual

Liquicap M FTI51
Endress+Hauser
7 →
∆c
0 = 8 pF
7
3
-
+
5
A0042472
10 →
3 1
7 3
-
+
5
A0042474
‣
Set the function switch to
position 1.
 37 The LEDs sequence regarding the switch-point capacitance value
7.2.7

Configuring two-point control and buildup mode

∆s
It is possible to use the probe rod of a fully insulated and vertically installed probe for
pump control as a two-point control. The switch-points of the empty and full calibration
activate, for example, a conveyor unit.
To use two-point control:
• set the necessary measuring range, see "Setting the measuring range" →  40.
• perform empty and full calibration
• set the failsafe mode (MIN/MAX) following your requirements, see →  52.
To switch on the two-point control (Δs- mode), the switch-point adjustment is disabled.
The switch-points correspond to the calibration points.
The "Buildup mode" ensures that a safe switch-point is an output even if the probe is not
fully released from the conductive medium (> 1 000 µS/cm). Deposits or buildup on the
rod is compensated for.
8 →
7
3
-
5
> 2 s
‣
Press the  key > 2 s to
decrease the value.
11
7 3
-
5
∆c
GN GN RD GN
2 pF
4 pF
8 pF
16 pF
32 pF
Commissioning
9 →
∆c
0 = 4 pF
7
-
+
5
A0042473
+
A0043652
GN YE
3
+
A0043643
A0042526
47