Siemens SITRANS L 7ML5400 Operating Instructions Manual page 110

General Operation
7.7 Pump Control
Set the OFF Setpoints
Parameter
OFF Setpoint Pump 1
(2.7.1.7.) (Page 190)
OFF Setpoint Pump 2
(2.7.1.9.) (Page 191)
Note
• The SITRANS LUT400 will not sacrifice other pumping strategies to ensure that the service
ratio is held true.
• If the pump ratios are set to the same value, then the ratio equals 1:1 and all pumps are
used equally (default).
When a pump start is required (ON Setpoint), the pump with the fewest running hours (with
respect to the assigned ratio values) starts.
Conversely, when a pump stop is required (OFF Setpoint), if multiple pumps are running
simultaneously, the pump with the most running hours (as compared to the assigned ratio
values) stops.
110
Sample Value Description
0.4 m Sets the level at which pump 1 turns off.
0.3 m Sets the level at which pump 2 turns off.
Operating Instructions, 04/2021, A5E33329501-AG
SITRANS LUT400