Hioki 3196 - Page 196

12.2 Measurement Specifications
190
Δ U Voltage Fluctuation
Measurement method
Change in RMS voltage (When measuring at 50/60 Hz, each waveform cal-
culation value is obtained from a shifted half cycle. When measuring at 400
Hz, each is obtained from one full cycle.) with respect to standard voltage
Display range
Nominal voltage
S(t) Instantaneous Flicker value
Measurement method
Per IEC61000-4-15
Weighting filters
230 V lamp 50 Hz system, 120 V lamp 60 Hz system
ΔV10 Flicker
Measurement method
Calculated using the “ΔV10 perceived flicker curve” .(page 210)
Δ V10 is measured at 1 minute intervals without gaps.
100 V conversion value
Display item
Δ
V10 measured at one minute intervals, average value for one hour, max-
imum value for one hour, fourth largest value for one hour, total (within the
measurement interval) maximum value
Standard voltage
Automatic (using AGC)
Measurement accuracy
±4%rdg.±0.01V
Conditions of guaranteed
accuracy
For 100 V RMS fundamental wave (50/60 Hz), 1 V RMS fluctuating voltage,
and 10 Hz fluctuating frequency.
IEC Flicker: short interval flicker value Pst and long interval flicker value Plt
Measurement method
Per IEC61000-4-15:1997+A1:2003
Pst is calculated after 10 minutes of continuous measurement and Plt after
2 hours of continuous measurement.
The 100 V lamp is per IEC SC77A National Committee, "IEC61000-4-15
Flickermeter Conformity Discussion Report for 100 Series Flicker Meter Ad-
Hoc W/G"
Flicker range
Uses logarithms to divides 0.0001 to 10000 P.U. into 1024.
Flicker filter
100 V lamp, 120 V lamp, 230 V lamp
Measurement accuracy
Pst: ±5% rdg.(as set forth for IEC61000-4-15 performance testing)
Valid for input ranging from 50 to 100% of the voltage measurement range
Harmonic Voltage, Current and Power (including fundamental waveform content)
Measurement method
Per IEC61000-4-7:2002
Harmonic voltage and harmonic current: After harmonic analysis is per-
formed, the adjacent inter-harmonics component is added to the harmonics
component of whole orders and displayed.
Harmonic power: Displays the harmonic power of each channel and its sum
for multiple channels. (For details, see the formula.(page 206))
Harmonic analysis window
width
10 or 12 cycles for 50 or 60 Hz, respectively, 80 cycles for 400 Hz
Number of points in 1 win-
dow
2048 points
Harmonic analysis window
Rectangular
Harmonic analysis frequen-
cies
1st to 50th orders (of 42.5- to 69-Hz fundamental waveform)
1st to 10th orders (of 360- to 440-Hz fundamental waveform)