Capacitive electrodes EL 4 … 20 mA - compact
27
4
3
2
1
+
-
8
0
2
6
4
4.2 Adjustment -
Oscillators
CAP E32 Ex and CAP E32 H Ex
Set-up
Functional description
0 Operate
Basic position
The instrument should be in this position during
measurement. In mode Operate the actual
measured value is transmitted. The plus and
minus keys do not function.
1 Min. adjustment
This function is used to carry out the min.
adjustment. Empty the vessel to min. level
(0 % - level).
Push the plus and minus key together to set the
current value for the actual level to 4 mA.
When you want to coordinate a certain current
value to a known level, you can modify the
current with the plus and minus keys. Every
time you push the key, the current value will be
changed in 10
µ
A-steps. When you keep the
key pushed, the value modifies with increasing
speed.
Example: When you know that your vessel is
filled to 10 %, then you can enter under min.
adjustment a value of 5,6 mA.
20 mA - 4 mA = 16 mA
16 mA * 10% = 1,6 mA
1,6 mA + 4 mA = 5,6 mA
It is recommended to connect an amperemeter,
see 3.2 Electrical connection. You can monitor
the current value during modification. When you
keep the key pushed, the value changes
automatically and with increasing speed. The
difference between min. and max. adjustment
should be at least 20% or 3,2 mA.
(+/-)
set 4 mA
(+)
increase current
(-)
lower current
2 Max. adjustment
You use this function to carry out the max.
adjustment. Fill the vessel to max. level (100 %
level). Push the plus and minus key together.
You can set the current value for the actual level
to 20 mA.
When you want to coordinate a certain current
Rotating switch (2)
With the rotating switch (10 steps) you choose
the appropriate mode.
As soon as you continue to turn the rotating
switch, the modified value is taken over.
0 Operate
1 Min. adjustment
2 Max. adjustment
3 Integration time
4 Reverse characteristics
5 Linearisation
6 Sensor optimization
7 Simulation current
8 Reset
9 Offset correction
Plus and minus keys (3 and 1)
With the keys + and - you can modify the
values of the parameters and choose out of
several possibilities.
When you push both keys together, the value of
the appropriately chosen function is reset to
factory setting
(except min./max. adjustment)
4
3
2
1
+ - + -
mA
U = 12 … 36 V
1
2
3
1 Minus switch
2 Rotating switch
3 Plus key
