Siemens BT300 Applications Manual page 91

Siemens Application
Enable setpoint 1 (P3.12.6.1)
Setpoint 1 max compensation (P3.12.6.2)
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.
Setpoint
Min Freq and Flow
Pressure
T
Position 1
Figure 34. Enable setpoint 1 for pressure loss compensation.
24-hour support +1-800-877-7545 (Dial 2)
Setpoint + Max compensation
Setpoint
No flow
P
Siemens Industry, Inc. • 89
Max Freq and Flow
Pipe length
P
T
Position 2
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