4.7 Viewing Efficiency and Loss Measurement Values
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Chapter 4 Viewing Measurement Values
This instrument uses active power and motor power values to calculate and display efficiency ( [%]) and
loss [W]. For example, inverter input-output efficiency and internal loss, and motor input-output efficient
and loss, as well as total efficiency, can be calculated by a single instrument.
4.7 Viewing Efficiency and Loss Measure-
ment Values
• Motor power (Pm) measurement can only be selected on models equipped with motor analy-
sis functionality.
• Measurement values may be scattered when measuring severely fluctuating or transient
loads. In that case, use the averaging function.
• On wiring systems with different power ranges, calculations use the data from the highest
power range.
• On wiring system with different sync sources, calculations use the most recent data at calcu-
lation time.
• When either one of the output power is a direct current (DC), making the synchronized
source setting for the channel to measure DC the same as the alternating current side can
suppress the unevenness of the efficient measurement value. E.g., in the following connec-
tion example (p. 91) on "Measuring Efficiency and Loss of a Switching Power Supply" in gen-
eral the CH1 synchronization source is set to U1, while the CH2 synchronization source is set
to 50 msDC, but when the fluctuation is great and there is unevenness in the efficient mea-
surement value, set the CH2 synchronization source to U1 same as CH1.
4.7.1 Displaying Efficiency and Loss
Press and then to select the [Efficiency] page.
Efficiency
Loss
• The display range for Efficiency ( [%]) is 0.00% to 200.00%.
• The display range for Loss [W] is 0% to
±120% of the power range.
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