8.2.20 Press.Loss.Comp
9101
Position of pressure sensor
Pos. Description
1 Pressure
2 No flow
3 With flow
4 Pipe length
5 Position 1
6 Position 2
If pressurizing a long pipe with many outlets, the best
place for the sensor would probably be halfway down
the pipe (Position 2). However, sensors might, for
example, be placed directly after the pump. This will
give the right pressure directly after the pump, but
farther down in the pipe the pressure will drop
depending on the flow.
P3.13.7.1 Enable SP 1
P3.13.7.2 SP 1 max compensation
The sensor is placed in Position 1. The pressure in
the pipe will remain constant when we have no flow.
However, with flow, the pressure will drop farther
down in the pipe. This can be compensated by raising
the setpoint as the flow increases. In this case, the
flow is estimated by the output frequency and the
setpoint is linearly increased with the flow as in the
figure below.
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