Siemens SITRANS LUT400 Series Operating Instructions Manual page 466

2.7.1.9.
The level at which Pump 2 turns OFF, defined in 2.1.1. Units.
Values
This parameter is set according to level even when another reading, such
as volume, is shown on the LCD.
2.7.1.10. Service Ratio Pump 1
Selects pump usage based on the RUN time ratio rather than last used.
(See 3.2.7.1.Run Time Relay 2.)
Values
This parameter only relates to relays with Pump Control Mode (2.7.1.4.) set
to Service Ratio Duty Assist or Service Ratio Duty Backup.
The number assigned to each pump relay represents the ratio applied to
decide the next pump to start or stop.
Notes:
• The SITRANS LUT400 will not sacrifice other pumping strategies to
• If the pump relays are set to the same value then the ratio equals 1:1
2.7.1.11. Service Ratio Pump 2
Selects pump usage based on the RUN time ratio rather than last used.
(See 3.2.7.2.Run Time Relay 3.)
Values
This parameter only relates to relays with Pump Control Mode (2.7.1.4.) set
to Service Ratio Duty Assist or Service Ratio Duty Backup.
The number assigned to each pump relay represents the ratio applied to
decide the next pump to start or stop.
Notes:
• The SITRANS LUT400 will not sacrifice other pumping strategies to
• If the pump relays are set to the same value then the ratio equals 1:1
A5E33329501 SITRANS LUT400 (HART) – OPERATING INSTRUCTIONS
OFF Setpoint Pump 2
ensure that the ratio is held true.
and all pumps are used equally (default).
ensure that the ratio is held true.
and all pumps are used equally (default).
Range: 0.000 to 99999.000
Default: 0.000
Range: 0 to 255
Default: 1
Range: 0 to 255
Default: 1
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