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  114.8v
Line
a2013

We're indirectly measuring the ac line voltage through a 12 volt ac wall transformer, a resistive voltage divider, half-wave rectifier and rc filter with time constant of about 1 second. (more)

  98.4%
Distortion
a2014

Peak line voltage as a perecent of that expected from rms average voltage. Switching loads "flat top" the ac line.

  117.0v
Line-RMS
acrms
We compute True-RMS from 20 cycles of the ac waveform.
  60.2°
Backyard
c63411

This unit is placed outside the basement window at the end of a steel tube that holds the sensor several feet away from the house.