3 Application Tutorial
74 Keysight U3402A User’s and Service Guide
Measure True RMS AC+DC
The multimeter can measure the true RMS value of the AC voltage and AC
current.
1 Press and , or and simultaneously. The multimeter
will measure the DC and AC signals alternatively, calculate and display the
AC+DC (RMS) value using the equation below:
AC+DC (RMS) = DC
2
+ AC
2
When AC+DC voltage measurement is selected, the DCV input impedance is
paralleled with the AC coupled 1.1 MΩ AC divider.
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