Accuracy - YOKOGAWA WT1800 User Manual

6.4

Accuracy

Voltage and Current
Item
Accuracy (at 6 months)
IM WT1801-03EN
Specifications
Conditions
Temperature: 23°C ± 5°C. Humidity: 30%RH to 75%RH. Input waveform: Sine wave. λ (power
factor): 1. Common-mode voltage: 0 V. Crest factor: 3. Line filter: Off. Frequency filter: Set to
1 kHz. After the warm-up time has elapsed. Wired condition after zero-level compensation or
measurement range change. The unit of f in the accuracy equations is kHz.
Voltage
Frequency Accuracy
±(reading error + measurement range error)
DC ±(0.05% of reading + 0.1% of range)
0.1 Hz ≤ f < 10 Hz ±(0.1% of reading + 0.2% of range)
10 Hz ≤ f < 45 Hz ±(0.1% of reading + 0.1% of range)
45 Hz ≤ f ≤ 66 Hz ±(0.1% of reading + 0.05% of range)
66 Hz < f ≤ 1 kHz ±(0.1% of reading + 0.1% of range)
1 kHz < f ≤ 50 kHz ±(0.3% of reading + 0.1% of range)
50 kHz < f ≤ 100 kHz ±(0.6% of reading + 0.2% of range)
100 kHz < f ≤ 500 kHz ±{(0.006 × f)% of reading + 0.5% of range}
500 kHz < f ≤ 1 MHz ±{(0.022 × f−8)% of reading + 1% of range}
Frequency bandwidth 5 MHz (−3 dB, typical)
Current
Frequency Accuracy
±(reading error + measurement range error)
DC ±(0.05% of reading + 0.1% of range)
0.1 Hz ≤ f < 10 Hz ±(0.1% of reading + 0.2% of range)
10 Hz ≤ f < 45 Hz ±(0.1% of reading + 0.1% of range)
45 Hz ≤ f ≤ 66 Hz ±(0.1% of reading + 0.05% of range)
66 Hz < f ≤ 1 kHz ±(0.1% of reading + 0.1% of range)
Direct input of a 50 A input element
1 kHz < f ≤ 50 kHz ±(0.3% of reading + 0.1% of range)
50 mV, 100 mV, or 200 mV range of an external current sensor's
input
Direct input of a 50 A input element
50 kHz < f ≤ 100 kHz ±(0.6% of reading + 0.2% of range)
Direct input of a 50 A input element
100 kHz < f ≤ 200 kHz ±{(0.00725 × f − 0.125)% of reading + 0.5% of range}
Direct input of a 50 A input element
200 kHz < f ≤ 500 kHz ±{(0.00725 × f − 0.125)% of reading + 0.5% of range}
Direct input of a 50 A input element
500 kHz < f ≤ 1 MHz ±{(0.022 × f − 8)% of reading + 1% of range}
Direct input of a 50 A input element
Frequency bandwidth 5 MHz (−3 dB, typical),
±(0.2% of reading + 0.1% of range)
±(0.5% of reading + 0.1% of range)
±{(0.1 × f + 0.2)% of reading + 0.1% of range}
±{(0.1 × f + 0.2)% of reading + 0.1% of range}
±{(0.05 × f + 5)% of reading + 0.5% of range}
Accuracy is not defined.
Accuracy is not defined.
5 A input element
External current sensor input of a 50 A input element
1
2
3
4
5
6
App
Index
6-7