VEGA VEGACAP 69 - transistor (NPN_PNP) - Manual (Page 19)

19
6 Setup
VEGACAP 69 • - transistor (NPN/PNP)
31176-EN-130916
To adjust VEGACAP 69, first of all remove the housing cover.
You can adapt the switching point to the solid with the potentiometer.
With the potentiometer (1) and the measuring range selection switch
(2) you can change the sensitivity of the probe to the electrical proper-
ties of the product and the conditions in the vessel. This is necessary
so that the level switch can also reliably detect products e.g. with very
low or very high dielectric figure.
range 1: 0 … 20 pF
Range 2: 0 … 85 pF
Range 3: 0 … 450 pF
With the mode switch (3) you can change the switching condition
of the transistor output. You can set the required mode (max. - max.
detection or overfill protection, min. - min. detection or dry run protec-
tion).
We recommend connecting according to the quiescent current princi-
ple (switching output is opened when the switching point is reached)
because the transistor output takes on the same (safe) condition if a
failure is detected.
Control lamp for indication of the switching status
•
Green = Output closed
•
Red = Output open
•
red (flashing) = failure
The adjustment of the switching point is only possible in installed
condition.
The specifications in parenthesis refer to the preceding illustration.
Horizontally mounted probes, angled probes
1. Set mode switch (3) to mode max [min.].
2. Set meas. range selection switch (2) to range 1.
3. Make sure the probe is not covered by the medium.
4. Turn the potentiometer (1) to 0, the control lamp (6) lights red
[lights green].
5. To determine the empty switch point, turn the potentiometer (1)
very slowly clockwise until the control lamp lights green [lights
red]. If the control lamp still lights red [lights green], then you have
to set the meas. range selection switch (2) to the next higher
stage and repeat the setting with the potentiometer (1) until the
control lamp lights green [lights red].
6. Note the position of the potentiometer (1).
In some cases the lowest range (range 1 = highest sensitivity)
is not sufficient to adjust the full switch point. This would make
another filling procedure necessary.
For this reason we recommend setting and noting the empty
switching point in all three meas. ranges. Set the meas. range se-
Switching point adapta-
tion (1)
Measuring range selec-
tion switch (2)
Mode adjustment (3)
Signal lamp (6)
Switching point adjust-
ment
Mode max. [mode min.]