13.2 Input Specifications/Output Specifications/Measurement Specifications
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Chapter 13 Specifications
-3. Accuracy specifications
-4. Measurement items and events
There are no accuracy specifications where measurement accuracy is not noted or for 3P3W2M CH3 mea-
sured values.
Conditions of
guaranteed accuracy
Guaranteed accuracy period: 1 year
Guaranteed accuracy period from adjustment made
by Hioki: 1 year
Temperature and humidity for guaranteed accuracy: 23°C±5°C (73°F±9°F), 80% RH or less
Warm-up time: at least 30 minutes
Power factor=1, common-mode voltage 0 V, specified after zero-adjustment
For AC measurement, add the following conditions:
With reference channel (U1) input that is greater than or equal to 10 V rms
Frequency Range : When the measurement frequency is set to 50 Hz: 40 Hz to 58 Hz
: When the measurement frequency is set to 60 Hz: 51 Hz to 70 Hz
: When the measurement frequency is set to 400 Hz: 360 Hz to 440 Hz
Temperature coefficient Specified with the instrument operated within the operating temperature and humidity range
Voltage, current, power: 0.03% f.s./°C (add 0.05% f.s./°C for DC measurement)
Effect of common mode voltage Within ±0.2% f.s. (600 V rms AC, 50 Hz/60 Hz, between voltage input terminal and the instrument
case)
Within ±2% f.s. (600 V rms AC, 400 Hz, between voltage input terminal and the instrument case)
Effect of external magnetic field In a magnetic field of 400 A rms AC/m, 50 Hz/60 Hz
Voltage: Within ±3 V
Current: Within ±1.5% f.s.
(1) Transient overvoltage (Tran)
Measurement method Detected from waveform obtained by eliminating the fundamental component (50 Hz/60 Hz/400 Hz)
from the sampled waveform. Detection occurs once for each fundamental voltage waveform.
Displayed item Transient voltage value : Waveform peak value during 4 ms period after elimination of funda-
mental component
Transient width : Period during which thre
shold is exceeded (2 ms max.)
Max. transient voltage value : Max. peak value of wa
veform obtained by eliminating the funda-
mental component during the period from transient IN to transient
OUT
(leaving channel information)
Transient period : Period from transient IN to transient OUT
Transient count during period : Number of transients
occurring during period from transient IN to
transient OUT (transients occurring across all channels or simulta-
neously on multiple channels count as 1)
Measurement range ±6.0000 kV pk
Measurement band 5 kHz (-3 dB) to 700 kHz (-3 dB), specified at 20 V rms
Minimum detection width 0.5 μs
Measurement accuracy ±5.0% rdg.±1.0% f.s. (specified at 1000 V rms/30 kHz and 700 V rms/100 kHz)
Event threshold 6,000.0 V
Specify the absolute value of a threshold for the peak value (crest value) of the waveform from which
the fundamental component has been eliminated
Event IN First transient overvoltage detected in an approx. 200 ms aggregation interval.The event occurrence
time indicates the time when the threshold was exceeded.
The peak voltage value and transient width are shown.
Event OUT Start of approx. 200 ms aggregation in which no transient overvoltage was detected for any channel
in the transient event IN state. The transient period (difference between the IN and OUT times) is
indicated.
Multiple-phase system treat-
ment
Begins when a transient is detected for any one of the U1 to U4 channels and ends when no tran-
sient is detected for any of the channels.
Saved waveforms Event waveforms, Transient waveforms
Waveforms are saved for 2 ms before and after the position a
t which the transient overvoltage wave-
form was detected for the first transient IN and 2 ms befor
e and after the point at which the transient
maximum voltage waveform was detected between the IN and OUT points.
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