Siemens BT300 Applications Manual page 90

Siemens Industry, Inc. • 88
Enable process supervision (P3.12.5.1)
Upper limit
P3.12.5.2)
Lower limit
(P3.12.5.3)
Delay (P3.12.5.4)
Upper and lower limits around the reference are set. When the actual value goes above or below, a
counter starts counting up towards the Delay (P3.12.5.4). When the actual value is within the allowed
area, the same counter counts down instead. Whenever the counter is higher than the Delay, an alarm
or fault (depending on the selected response) is generated.
PRESSURE LOSS COMPENSATION
Pressure
PT
Position 1
If pressurizing a long pipe with many outlets, the best place for the sensor is probably halfway down the
pipe (Position 2). However, sensors may, 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.
Actual value
Regulating mode
Figure 32. Process supervision.
Figure 33. Position of pressure sensor.
No flow
PT
Position 2
24-hour support +1-800-877-7545 (Dial 2)
Siemens Application
Refer ence
Alarm or fault
11108.emf
Pipe length
11109.emf