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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 r 0.2% of range)
0.5 Hz
≤
f < 45 Hz
±
(0.1% of r 0.2% of range)
45 Hz
≤
f
≤
66 Hz
±
(0.1% of r 0.1 % of range)
66 Hz < f
≤
1 kHz
±
(0.1% of r 0.2 % of range)
1 kHz < f
≤
10 kHz
±
{(0.07
×
f)% of r 0.3 % of range}
10 kHz < f
≤
100 kHz
±
(0.5 % of r 0.5 % of range)
±
[{0.04
×
(f – 10)}% of reading]
* The unit of f in the read error equation is kHz.
Add
±
10
µ
A 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.