OTT SE 200, Operating Instructions Manual

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5.5 Setting the rotational direction for depth or level measurement
Rotational direction definition
Example: The float pulley rotates clockwise
SE 200 with rotational direction to the “left“
→
decreasing measured values
SE 200 with rotational direction to the “right“
→
increasing measured values
Adjusting the rotational direction for an SDI-12 interface
You can alternate between level and depth measurement using the SDI-12 com-
mand “Change Rotational Direction” This command changes the effect of the float
pulley rotational direction on the measured value (whether it counts upward/
downward). This depends on the end of the float cable at which the float hangs
and the end at which the counterweight hangs.
䡵
Select the value (0 or 1) for the “Change Rotational Direction“ command so
that the following conditions are met:
Water level Measured value
Depth rises
↑
decreasing
↓
M easurement falls
↓
increasing
↑
Level rises
↑
increasing
↑
M easurement falls
↓
decreasing
↓
Adjusting the rotational direction for a 4 … 20 mA interface
For the SE 200 with a 4 … 20 mA output, the level or depth measurement must
be done using the float and counterweight arrangement at the float cable. The
SE 200 is available from the factory in “left” or “right” rotational settings.
䡵
Select the position of the float and counterweight so that the conditions shown
in Table 1 are met.
Table 1:
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