4.7 Viewing Efficiency and Loss Measurement Values
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4
Chapter 4 Viewing Measurement Values
Here is an efficiency and loss measurement example.
Before measuring, perform the preparations in "Chapter 3 Measurement Preparations" (p. 25)), and
make the appropriate connections and settings.
Example: The input and output sides of the switching power supply are connected to CH 1 and CH 2 of
the instrument, respectively.
4.7.3 Measurement Examples
Measuring Efficiency and Loss of a Switching Power Supply
Connection Example
Required items:
• L9438-50 Voltage Cord ×2
• 9272-05 Clamp On Sensor ×1
......................................................input side
• CT6841-05 AC/DC Current Probe ×1
......................................................output side
Input side Output side
Switching
Power Supply
Wiring Mode Setting
Wiring Mode 1
[1P2W] × 4 systems
Calculation Formula Setting
Set Pin1 to P1,
and Pout1 to P2
Calculation Formula
1 = 100 × P2/P1
Loss1 =P1 -P2
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