16-3
IM 760401-01E
Specifications
16
16.2 Accuracy
Voltage and Current Accuracy
Item Specifications
Accuracy Requirements
• Temperature: 23±5°C.
• Humidity: 30 to 75%RH.
• Power factor: 1
• Crest factor: 3
• Input waveform: Sine wave
• Common-mode voltage: 0 V
• Scaling function: OFF
• Number of displayed digits: 5 digits
• Frequency filter: Turn ON to measure voltage or current of 200 Hz or less
• After warm-up time has passed
• After wiring is complete and zero-level compensation or measurement range is changed.
Accuracy (3 months after calibration)
Frequency Accuracy
(The accuracy shown below is the sum of reading and range errors.)
DC ±(0.2% of reading + 0.2% of range)
0.5 Hz ≤ f < 45 Hz ±(0.1% of reading + 0.2% of range)
45 Hz ≤ f ≤ 66 Hz ±(0.1% of reading + 0.1 % of range)
66 Hz < f ≤ 1 kHz ±(0.1% of reading + 0.2 % of range)
1 kHz < f ≤ 10 kHz ±{(0.07 × f)% of reading + 0.3 % of range}
10 kHz < f ≤ 100 kHz ±(0.5 % of reading + 0.5 % of range) ± [{0.04 × (f – 10)}% of reading]
* The unit of f in the read error equation is kHz.
Add ±10 µA to the DC accuracy of current.
Effective input range 1 to 130% with respect to the rated range of voltage or current.
(Except, add the reading error × 0.5 for the range of 110% to 130% of the rated range.)
Lower limit of measurement frequency
Display update rate 0.1 s 0.25 s 0.5 s 1 s 2 s 5 s
Lower limit of measurement frequency 25 Hz 10 Hz 5 Hz 2.5 Hz 1.5 Hz 0.5 Hz
Effect when the line filter 45 to 66 Hz: Add 0.2% of reading. Less than 45 Hz: Add 0.5% of reading.
is turned ON
Temperature coefficient Add ±0.03% of reading/°C in the range 5 to 18°C or 28 to 40°C.
Accuracy 12 months Add ±(reading error of the accuracy at 3 months after calibration × 0.5)
after calibration
Accuracy when the crest Accuracy obtained by doubling the measurement range error for the accuracy when the crest factor
factor is set to 6 is set to 3.
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