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PA3000 Four-channel, Multi-phase AC/DC Power Analyzer
Efficiency Testing Single Phase Applications
DEMONSTRATION GUIDE
This procedure can also be used for testing efficiency on other applications
such as UPS systems, LED drivers, or DC-AC inverters.
1. Set the PA3000 to the default configuration:
– Press
.
– Scroll down to
User Configuration and press
.
– Select
Load Default Configuration, and then press
to confirm. The PA3000 will load
the defaults and display a confirmation screen. Press
and then return to the Main
Menu by pressing
.
2. In the Main Menu, go to
Measurements, press
, and then select the desired
parameters for the AC input signal.
– The first channel will be represented as Group A on the yellow bar at the top of the screen.
– Select the desired measurements: Vrms, Arms, Watts, VA, PF, Acf, Athd, and A Harmonics.
3. Select Group B representing the second channel on the PA3000 by pressing the right arrow
key on the left panel of the PA3000.
4. Select the desired measurements for the DC output such as Watt, Vdc, and Adc; deselect
any preset measurements that are not needed.
5. After selecting all of the desired parameters, press
to view the Results screen.
– The PA3000 is now set up for making AC and DC measurements on the first and second
channels respectively.
6. Power on the DUT from the AC source; an appropriate load can be applied to the DUT at this point.
– The Results screen should start updating the real time measurements.
7. The Math function can be used for calculating efficiency. Press
to set up efficiency formula.
8. On the Math screen, press the MATH soft key.
9. Select the desired function from the list and then press
to enter the options.
NOTE: The Edit Function can be used to edit any specific math formula. While in the edit
function, press
to enter the Help menu for help in formatting the function or refer to the
information earlier in this manual.
10. For the efficiency calculations, enter (CH2:W/CH1:W)*100 and then press
. Press
to go back to Math menu where the function can be renamed and units can be added, if desired.
11. Go back to the Math menu and scroll down to the newly edited function and enable the
function by pressing
. Select all functions that need to be displayed on the screen.
12. Press
to view the Results screen.
13. To view selected math formulas, press
.
14. To view math formulas along with other results, press
to view the Results screen and
press
multiple times until the math window appears at the bottom of the screen.
15. PA3000 Power Analyzer is now ready to take efficiency measurements.
Optional Steps when using Keithley 2380 Electronic Load
16. Set the Keithley 2380 Electronic load in Constant-Current (CC) mode by pressing the
CC key on the front panel and set the value for full load current based on the output
specification of the power supply under test. Press the on/off button.
