Page 90 SITRANS LUT400 (HART) – OPERATING INSTRUCTIONS A5E33329501
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General Operation
Reducing wall cling
Use the Wall Cling Reduction function to randomly alter the ON and OFF setpoints over a
range. This eliminates the ridge of material that builds up at the setpoint that can give
false echoes.
This setting may increase the number of days between trips to clean the wet well.
Enable Wall Cling Reduction by setting
2.7.2.1.1. Enable
= Enabled. Then set the range in
2.7.2.1.2. Level Setpoint Variation
. The pump ON and OFF setpoints are randomly varied
inside this range so the material level does not stop at the same point each time.
Example:
A range of 0.5 meters is used to vary the setpoint. The randomly-selected setpoints are
always inside the ON and OFF setpoints.
Random Setpoint
Range
ON Setpoint
Level Setpoint
Variation
OFF Setpoint
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