Page 266 SITRANS LUT400 (HART) – OPERATING INSTRUCTIONS A5E33329501
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App. A - Technical Ref.
Pump Totalizers
Inflow/Discharge Adjust
Pumped volume totals are affected by the inflow (or discharge) rate. This rate can be
calculated based on rate of change estimation, or pump cycle timing.
Using Inflow/Discharge Adjust (2.7.3.4.), set option Based on rate estimation to have the
inflow rate measured just prior to the start of the pump cycle.
Set option Based on pump cycle to calculate the inflow based on the change of volume
between the end of the last pump cycle and the start of the next one, and the time period
between the last cycle and the current one.
well refillspump down
Time
Level
Inflow estimation =
L
T
L
T
well refills
pump down
L
2
–L
1
T
2
–T
1
T
1
T
2
L
1
L
2
Time
Level
Inflow estimation =
L
2
–L
1
T
2
–T
1
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