Hioki PW3335 - Measurement Specifications

5.3 Measurement specifications
138
Accuracy
We define measurement tolerances in terms of f.s. (full scale), rdg. (reading) and dgt. (digit) values, with the
following meanings:
Basic Measurement Specifications
5.3 Measurement specifications
f.s. (range) This is usually the name of the currently selected range.
rdg. (reading or displayed value) The value currently being measured and indicated on the measuring instrument.
dgt. (resolution)
The smallest displayable unit on a digital measuring instrument, i.e., the input val-
ue that causes the digital display to show a "1" as the least-significant digit.
Measurement method Simultaneous voltage and current digital sampling, zero-cross simultaneous calculation
Sampling frequency Approx. 700 kHz
A/D converter resolution 16-bit
Frequency bands DC, 0.1 Hz to 100 kHz (Reference value of 0.1 Hz  f < 10 Hz)
Synchronization sources
(SYNC)
U, I, DC (fixed to 200 ms) (default state: U)
When an AC measured value of a signal input to the source is less than 1%f.s. of the
set range, operation and accuracy are not defined.
When synchronization cannot be detected, the SYNC lamp (ERROR) will light up, and
operation and accuracy are not defined.
When the synchronization source is DC, accuracy is not defined for input with a cycle
that is not divisible by 200 ms.
Synchronization timeout setting: 0.1 sec. / 1 sec. / 10 sec. (linked to measurement lower
limit frequency setting, default state: 0.1 sec.)
Measurement items Voltage, current, active power, apparent power, reactive power, power factor,
phase angle, frequency, current integration, active power integration, integration time,
voltage waveform peak value, current waveform peak value, voltage crest factor,
current crest factor, maximum current ratio, time average current,
time average active power, voltage ripple rate, current ripple rate
Harmonic parameters
Harmonic voltage RMS value, harmonic current RMS value, harmonic active power,
total harmonic voltage distortion, total harmonic current distortion, fundamental wave
voltage, fundamental wave current, fundamental wave active power, fundamental
wave apparent power, fundamental wave reactive power, fundamental wave power
factor (displacement power factor), fundamental wave voltage current phase differ-
ence, harmonic voltage content percentage, harmonic current content percentage,
harmonic active power content percentage
(The following parameters can be downloaded as data with communications but not dis-
played): Harmonic voltage phase angle, harmonic current phase angle, harmonic volt-
age current phase difference
(Default state: display area a; voltage, display area b; current, display area c; active
power, display area d; power factor)
Rectifiers AC+DC
AC+DC Umn
DC
AC
FND
(Default state:
AC+DC measurement Display of true RMS values for both voltage and current
AC+DC measurement Display of average value rectified RMS converted values for
voltage and true RMS values for current
DC measurement Display of simple averages for both voltage and current
Display of values calculated by (voltage DC value) × (current
DC value) for active power
AC measurement Display of values calculated by
for both voltage and current
Display of values calculated by
(AC+DC value) - (DC value) for active power
Extraction and display of the fundamental wave component from harmonic measurement
AC+DC for all display areas)
Zero-cross Filter 100 Hz/ 500 Hz/ 5 kHz/ 100 kHz
(linked to frequency measurement range, default state: 500 Hz)
100 Hz: 0.1 Hz to 100 Hz 500 Hz: 0.1 Hz to 500 Hz
5 kHz: 0.1 Hz to 5 kHz 100 kHz:0.1 Hz to 100 kHz
The zero-cross filter lower limit setting is linked to the synchronization timeout setting.
10 Hz/ 1 Hz/ 0.1 Hz
(AC+DC value)
2
- (DC value)
2