Siemens SITRANS LVL200E Instrukcja obsługi - Strona 21
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Mode adjustment (2)
Sensitivity adjustment
(3)
SITRANS LVL200E - CONTACTLESS ELECTRONIC SWITCH
With the mode adjustment (A/B) you can change the switching
condition of the relay. You can set the required mode according to the
"Function chart" (A - max. detection or overflow protection, B - min.
detection or dry run protection).
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.
6.3 Functional chart
The following chart provides an overview of the switching conditions
depending on the adjusted mode and level.
Level
Mode A
Overflow protection
Mode A
Overflow protection
Mode B
Dry run protection
Mode B
Dry run protection
Switching status
Control lamp
1
2
Switch closed
1
2
Switch open
1
2
Switch closed
1
2
Switch open
6 Set up
Green
Red
Green
Red
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