VEGA VEGACAP 82-98 - Manual (Page 25)

VEGACAP 25
4.2 Switching point adjustment
With the A/B-switch (4) you can choose the
mode of VEGACAP - whether the level switch
should be used as max. detection A (overfill
protection) or min. detection B (protection
against dry running of pumps). As a rule, the
switching point adjustment is only possible in
assembled condition. The numbers in
parantheses relate to figure "4.1 Adjustment
elements“.
Horizontally mounted electrodes,
electrodes for adhesive products, plate
electrodes, angled electrodes
( with oscillator CAP E30… , fig.
4.1)
(VEGACAP 11, 21, 26, 60, 61, 82, 84, 92, 97)
Mode A / [mode B]
• Make sure that the test switch (outside on
the housing - option) is set to position 0.
• Set the A/B-switch (4) to mode A [B].
• Set the changeover switch (6) to position 1.
• Make sure that the electrode is uncovered.
• Turn the potentiometer (5) to 0; the control
lamp (2) lights [extinguishes].
• Turn the potentiometer (5) very slowly
clockwise until the control lamp extin-
guishes
[lights], to determine the empty
switching point. If the lamp does not extin-
guish
[light], set the changeover switch to
the next higher stage and repeat the ad-
justment with the potentiometer until the
control lamp extinguishes
[lights].
• Note the position of the potentiometer (5).
In some cases the lowest range (range 1 =
highest sensitivity) is not sufficient to adjust
the full switching point. This would require
another filling procedure.
For this reason, we recommend adjusting
and noting the empty switching point in all
three ranges.
Setup
- Set the changeover switch (6) to the next
higher position and repeat the adjust-
ment. Note the value for the next higher
range.
Empty Full
adjustment adjustment
Range 1
Range 2
Range 3
- Set the changeover switch (6) to the
lowest range where the control lamp
extinguishes
[lights].
• Fill the vessel until the electrode is com-
pletely covered.
• Turn the potentiometer (5) very slowly
clockwise until the control lamp extin-
guishes
[lights]. Note the position of the
potentiometer (5). We recommend docu-
menting the value of the empty and full
switching point as well as the range.
• If the lamp does not extinguish [light], set
the changeover switch (6) to the next
higher stage and repeat the adjustment
with the potentiometer until the control lamp
extinguishes
[lights].
• Set the potentiometer (5) to the average
value of the two noted values.
The measuring system is now ready for
operation.
• If you cannot find the full switching point in
one of the ranges, we recommend setting
the changeover switch (6) to the lowest
range in which you have found the empty
switching point. Set the potentiometer (5) to
the average value between empty switch-
ing point and 10.