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PA3000 Four-channel, Multi-phase AC/DC Power Analyzer
Efficiency Testing Single Phase Applications
DEMONSTRATION GUIDE
Efficiency Testing Single Phase Applications
This example demonstrates a simple method to make efficiency measurements on an external
AC-DC power supply that is rated to the level VI efficiency standard. Similar principles can also
be applied to efficiency testing on any AC-DC power supply, DC-AC inverter, and other related
converter including solar inverter and UPS systems.
TEST SETUP
Complete the following steps to setup the efficiency measurement on an AC-DC power
supply with the PA3000 Power Analyzer:
1. Connect the AC input on the device under test (DUT) to the first channel of the PA3000
using a Tektronix Breakout Box (BB1000) as shown in the wiring diagram.
(See Figure 1-2.)
2. The breakout box taps in to the current signal and measures the voltage across the input
terminals. The breakout box makes it easier and safer to connect the input AC signal on the
DUT using the 4 mm safety leads provided with PA3000.
3. Connect the output DC terminals on the second channel of the PA3000 using the provided
safety leads. The current shunt on the PA3000 is connected in series with the output load;
the voltage channels are connected across the positive and negative terminals of the power
supply as show in the figure.
4. After making all of the connections, use one of the two methods to make the efficiency
measurement.
PA3000 POWER ANALYZER (FRONT PANEL)
AC LINE
BB1000-UN
BREAKOUT BOX
Example test configuration and measurement results for testing AC/DC power supplies and LED drivers.
Time
Volt
s/
Amps
Time
Ef
ficie
nc
y
V
out
Time
2380 ELECTRONIC LOAD
POWER SUPPLY UNDER TEST
Figure 1-1. Efficiency Testing setup for AC-DC Power Supply.
WATCH VIDEO
How to Make Efficiency
Measuremensts on
AC-DC Power Supply
www.tek.com/
effciency1ph_video
