12
• To ensure measurements are precise, warm up the device for
at least 30 minutes after plugging it in.
• This device is designed to measure commercial power lines
with a frequency of 50 or 60 Hz. It cannot measure power lines
of other frequencies or power lines where the waveforms are
controlled using an inverter.
• This device cannot measure power lines with superposed
direct current.
• This device uses algorithms to measure values for input volt-
age and current waveforms using (see the specifications). On
devices using different operation principles or algorithms differ,
differences in measurement values may result.
• The voltage and current measurements will be reduced to zero
when inputs are less than 0.4% of the measurement range.
When the voltage or current is zero, the active power, reactive
power, and apparent power measurements will be reduced to
zero and the power factor will be treated as invalid data.
Measurement values