72-9490: OPERATING MANUAL
33
True RMS Measurement and Average Value Measurement
The True RMS measurement method can measure accurately the effective value of non-sine wave input signal.
Average value measurement method can measure the mean value of one sine wave input signal, and then displays
it as RMS value
Note
When there is no input signal, it cannot carry out active energy measurement.
When there is input signal, the maximum waiting time is approximately 10s before timing.
When testing has been completed, disconnect the connection between the testing leads and the circuit under test
and remove testing leads from the input terminals.
5.
MAX/
and
MIN/
are not valid when measuring active energy.
6. Press
CLEAR
to reset the time.
The maximum reading of acitve energy is 9999kWh.
OL
will be displayed when the reading is over than that.
When the input waveform has distortion, measuring tolerance will be included. The total tolerance depends on the
total distortion. Below table 1 shows the waveform coefficient and the relationship and the requested changing factor
of sine wave, square wave, peak wave of triangle wave, RMS value and average value.
Содержание 72-9490
Страница 1: ...72 9490 ...
Страница 24: ...72 9490 OPERATING MANUAL 23 3 ...
Страница 25: ...24 72 9490 OPERATING MANUAL neutral as shown in figure 8 ...
