Dual Pump Control - Siemens SITRANS L Pointek ULS200 Operating Instructions Manual

6.5

Dual pump control

This application uses the device to provide a control output when the process material rises
to a high level.
Typically, wet wells are used to temporarily hold storm and/or waste water. When the water
surface reaches a high level setpoint, the wet well is pumped down. The process material
will be pumped down by the deadband value to another setpoint where the control will turn
off.
Relay function 13: dual pump down
①
②
③
④
⑤
⑥
⑦
⑧
⑨
Application adjustments
Relay function
Relay setpoints
Deadband values
30
4 m
Relay 1 (e.g. 1 m)
Relay 2 (e.g. 0.75 m)
Blanking (e.g. 0.5 m)
Pump 2 start
Pump 1 start
Both pumps stop
Deadband 2 (e.g. 3.25 m)
Deadband 1 (e.g. 3 m)
6 - high control/low alarm
•
7 - high control/high alarm
•
10 - high control/LOE alarm
•
13 - high control/high control
•
Set to desired values.
Referenced from relay setpoints (distance from
Pump Start setpoint to Pump Stop setpoint).
Operating Instructions, 01/2019, A5E32268616-AB
Pointek ULS200