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Press this button to select V1, I1, V2, I2, V3, or I3 for harmonics analysis
Press this button for the voltage or current input range
Press this button to enter SETUP mode and then select the parameter
to be adjusted
Press this button to increment value by one. Hold the button for
two seconds or more to speed up the increment.
Press this button to decrement value by one. Hold the button for
two seconds or more to speed up the decrement.
In the mode of harmonic analysis, press this button to move the
cursor left to the previous order.
In the mode of harmonic analysis, press this button to move the
cursor right to the next order.
Press this button to start data logging. Press it again to stop data
logging. The sampling interval is displayed in LCD pointed by SEC
