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Item
Accuracy
IM WT3001E-51EN
Specifications
• When the line filter (5.5 kHz) is ON
Frequency
Voltage and Current
±(reading error + measurement
range error)
45 Hz ≤ f ≤ 66 Hz
0.2% of reading + 0.04% of range
66 Hz<f ≤ 440 Hz
0.5% of reading + 0.05% of range
440 Hz<f ≤ 1 kHz
1% of reading + 0.05% of range
1 kHz<f ≤ 2.5 kHz
2.5% of reading + 0.05% of range
2.5 kHz<f ≤ 3.3 kHz
8% of reading + 0.05% of range
However, all the items below apply.
•
When the crest factor is set to 3
• When λ (power factor) = 1
•
Power figures that exceed 440 Hz are reference values.
•
For external current sensor range, add 0.03 mV to the current accuracy and add (0.03 mV/
external current sensor range rating)×100% of range to the power accuracy.
•
For direct current input range on the 30-A input element, add (0.1 mA/direct current input
range rating)×100% of range to the power accuracy.
•
For direct current input range on the 2-A input element, add (1 µA/direct current input range
rating)×100% of range to the power accuracy.
•
For direct current input in a range less than or equal to 200 mA on the 2-A input element, add
0.02% of reading + 0.01% of range to the current accuracy in the range of 45 Hz ≤ f ≤ 66 Hz
and add 0.03% of reading + 0.01% of range to the power accuracy.
th
•
For n
order component input, add ({n/(m+1)}/50)% of (the n
th
order and n-m
order of the voltage and current, and add ({n/(m+1)}/25)% of (the n
th
reading) to the n+m
order and n-m
frequency).
•
Accuracy when the crest factor is 6: The same as when the range is doubled for crest factor 3.
•
The accuracy guaranteed range by frequency and voltage/current is the same as the
guaranteed range of normal measurement.
9.6 IEC Harmonic Measurement Specifications
Power
±(reading error + measurement
range error)
0.4% of reading + 0.05% of range
1.2% of reading + 0.1% of range
2% of reading + 0.1% of range
5% of reading + 0.15% of range
16% of reading + 0.15% of range
th
order reading) to the n+m
th
order of the power (only when applying a single
1
2
3
4
5
6
th
th
order
7
8
9
10
11
12
13
Index
9-11
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