Chroma 66203, Руководство пользователя

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Digital Power Meter 66203/66204 User’s Manual
4-28
2. It is necessary to turn off the integration function first to change the
range or related function settings.
3. The power meter will use Window or Average to do the
measurement if the integration mode measurement is closed and
returned to the measurement screen,
4. INTEG and E (energy) are two separate operations that can be
tested at the same time.
FILT
Figure 4-42 FILTER Setup Screen
The 66203/66204 Digital Power Meter has low pass digital filter function with 5 kHz cutoff
frequency that is compliant with the IEC 61000-3-2 international standard. When the filter is
enabled, it can filter out the high frequency noise from the input voltage and current signal
such as the switch noise of switchable power supply.
Figure 4-43 Before & After Waveform Filtering
When using the harmonic measurement function, if the harmonic frequency desired for
measurement is higher than the digital filter bandwidth, the filter needs to be turned off first.
Otherwise, the harmonic will be affected by the filter; for instance, to measure the fundament
wave 60Hz with 100 levels of harmonic, since the harmonic frequency 6 kHz is larger than
the filter’s bandwidth, it is suggested to turn off the filter and then perform the measurement.
The measurement bandwidth is about 60 kHz when the digital filter is OFF.
Higher measurement bandwidth is required when measuring the inrush current. Therefore,
the digital filter will apply OFF state even if the filter is set to ON so that the measured inrush
current will not be affected.
Following is the procedure to set the digital filter. The filter state of each module cannot be
set separately.
After filtering