Burkert Type 8112 - Manual (Page 21)

Single-coloured control lamp for indication of the switching condition.
l red = High current ≥ 2.6 mA
l dark = Low current ≤ 0.6 mA
l red (flashing) = Failure ≤ 0.6 mA
The characteristics reversal can be carried out with the DIL switch.
You can choose between falling characteristic curve (switch position
max.) and rising characteristic curve (switch position min.). This allows
you to output the desired current.
Modes
l min. - rising characteristic curve (High current when immersed)
l max. - falling characteristics (Low current when immersed)
The NAMUR output can be switched over to falling or rising
characteristics (see also "Function chart").
For applications according to WHG, the DIL switch must be set to
position max.
With this DIL switch (3) you can set the switching point to liquids
having a density between 0.5 and 0.7 g/cm³ (0.018 and 0.025 lbs/in³).
With the basic setting, liquids with a density of > 0.7 g/cm³ (0.025 lbs/
in³) can be detected. In liquids with lower density, you must set the
switch to > 0.5 g/cm³ (0.018 lbs/in³). The specifications for the position
of the switching point relate to water - density value 1 g/cm³ (0.036 lbs/
in³). In products with a different density, the switching point will shift in
the direction of the housing or tuning fork end depending on the
density and type of installation.
Note:
Keep in mind that foams with a density > 0.45 g/cm³ (0.016 lbs/in³) are
detected by the sensor. This can cause faulty switchings particulary
when used as dry run protection system.
The simulation key is located in a recess on the upper side of the
electronics module. Push the simulation key with a suitable object
(screwdriver, pen, etc.).
When the key is pushed, a line break between sensor and processing
unit is simulated. The signal lamp on the sensor extinguishes. The
measuring system must signal a fault and take on a safe condition
when the key is pushed.
Keep in mind that downstream connected instruments will be activated
during operation. This allows you to check the correct function of the
measuring system.
6 .3 Function chart
The following chart provides an overview of the switching conditions
depending on the adjusted mode and level.
Signal lamp (1)
Characteristics reversal
(2)
Sensitivity adjustment
(3)
Simulation key (4)
LEVEL SWITCH 8112 • with NAMUR output 21
6 Set up
32052
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EN
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120418