Calculating Efficiency - MultiTrode MultiSmart Installation & Operation Manual

MultiSmart Installation & Operation Manual

17.4 Calculating Efficiency

The MultiSmart has support for calculating the pump efficiency and displaying it on the LCD screen as well
as sending it to SCADA. To be able to calculate the efficiency, energy monitoring, motor protection and flow
must be enabled. Refer to Section 17 for more information on energy monitoring and motor protection and
refer to Section 20 for more information on flow.
Efficiency is calculated as Volume/Energy AND as Volume/Energy/Head.
17.4.1 Efficiency
Efficiency can be displayed in Litres/kWh or kWh/Megalitre. This can be configured by navigating to:
Efficiency information for today, yesterday, this week, last week, this month & last month and total efficiency
can be observed at the following menu on the LCD screen.
The efficiency can also be set to be displayed in the main screen. To set this:
Navigate to:
Select the desired efficiency data to be displayed.
The efficiency calculations are updated dynamically in all flow calculation modes except for calculated mode
where the efficiency is updated at the end of the pump cycle.
When an overflow condition is detected, a constant flow rate which is the previous average of the pump
outflow rate is used for the current pump cycle for efficiency calculations. As soon as the pumps catch up
and the overflow is cleared, the MultiSmart will resume normal flow calculations.
There are occasions where manual override of power factor is desirable. For example, Modbus
communications to a VFD may not include power factor, and energy and efficiency calculations may
therefore be incalculable. In this scenario, the power factor can be measured manually and stored into the
MultiSmart as a parameter which is then be used by the MultiSmart for energy and efficiency calculations.
To configure this navigate to:
and select the corresponding power (Power 01 etc) option with respect to the pump number, set the power
factor value of Manual Power Factor option and Save the settings.
MultiSmart will now use the new power factor for the efficiency calculations.
17.4.2 Efficiency per Unit Head
To make use of this calculation, the parameter Head must be altered in the advanced screens:
This value is used to display the True Efficiency calculations in the Power & Efficiency page in the Info
screens.
MultiSmart_IO_Manual_R20
and selecting the Efficiency Units.
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