Hioki PW8001-11 - Measurement Upper Frequency Limit and Lower Frequency Limit (Configuring Frequency Measuring Range)

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Measuring Power
Measurement upper frequency limit and lower frequency limit
(conguring frequency measuring range)
The instrument can simultaneously measure multiple circuits’ frequency values. Frequency
measurement includes a measurement lower frequency limit setting and a measurement upper
frequency limit setting so that you can limit the range of frequencies you wish to measure for each
wiring conguration. When measuring waveforms with multiple frequency components such as a
PWM waveform’s fundamental frequency and carrier frequency, congure the settings based on the
input frequencies you wish to measure.
Display screen [INPUT] > [CHANNEL]
11
1
To open the settings window, tap the
channel detailed display area.
Detailed settings for each wiring conguration
can be seen in this window.
2
Tap the [Upper f lim.] box, then select
the upper frequency limit from the list.
100 Hz, 500 Hz, 1 kHz, 5 kHz, 10 kHz,
50 kHz, 100 kHz, 500 kHz, 1 MHz,
2 MHz (selectable for the U7005 only)
3
Tap the [Lower f lim.] box, then select
the lower frequency limit from the list.
0.1 Hz, 1 Hz, 10 Hz, 100 Hz, 1 kHz, 10 kHz,
100 kHz
4
Tap [
×
] to close the setting window.
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33
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IMPORTANT
Accuracy for frequency measurement is guaranteed for sine wave input greater than or equal to
30% of the voltage or current range. The instrument may not be able to measure input outside
that range.
• When receiving input at a frequency lower than the data refresh interval setting’s period, the data
refresh interval will vary with the input frequency.
• The instrument may display a frequency that di󰀨ers from the input if a frequency signicantly
higher than the measurement upper frequency limit or a frequency lower than the measurement
lower frequency limit is inputted.
Zero-cross high-pass lter (ZC HPF)
• This high-pass lter setting is used to detect waveform zero-crossing points.
• If the frequency does not stabilize during measurement of low frequencies, changing this setting
to [OFF] can stabilize the frequency.
• Set the [ZC HPF] to [ON] while measuring ripple current.
Displaying Power Numerically
HIOKI PW8001A961-00