8-8
IM CW120-E
8.5 Sampling Cycle and Integration Cycle
Synchronously with the zero crossing signal for the input voltage V1, the time
period from when a cycle of zero-crossing begins until a cycle of zero crossing
occurs immediately next after a specified period (100 milliseconds) has
elapsed, is set to the integration cycle, and the rms voltage, rms current, and
power are calculated.
Sampling frequency: Approx. 10 kHz
Integration cycle: 120 ms
50 Hz
100 ms
20 ms
Frequency
measurement
input V1
(sine wave)
Zero-crossing
signal
Examples
Frequency (Hz)
50
60
Integration Cycle (ms)
120
116.67
Number of Waves
6
7
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