4
4.2.3
fundamental wave measurement accuracy of resistive current: ± (reading × 5% + 5uA)
4.2.4
Current harmonics measurement accuracy: ± (reading × 10% + 10uA)
4.2.5
Current channel input resistance: ≤ 2Ω
4.3 Electric-field Intensity Measurement
4.3.1
input range of electric field strength: 30kV/m
～
300kV/m
4.3.2
accuracy of electric field intensity measurement:± (reading × 10%)
4.3.3
accuracy of electric field harmonic measurement: ± (reading × 10%)
4.4 Service Conditions And Shape
4.4.1
power supply
：
built-in lithium battery or external charger, charger input 100-240VAC
50Hz/60Hz,output DC8.4V 2A
4.4.2
Charging time: 4 hours
4.4.3
Battery life: host:8h, Voltage Collector: 8h
4.4.4
size of the host: 246mm (length) × 156mm (width) ×62mm (height)
4.4.5
weight of the host
：
1.0kg (excluding cables)
4.4.6
size of the
v
oltage collector : 115mm (length) × 120mm (width) × 65mm (height)
4.4.7
voltage collector : 0.6kg (excluding cables)
4.4.8
service temperature: -10
℃～
50
℃
4.4.9
relative humidity:
＜
90%
，
No condensation
5.Measurement And Compensation Principle
5.1 Measuring Principle
The instrument adopts the projection method shown in Figure 1 to
calculate the resistive current of the fundamental wave and each
harmonic wave.
Figure 1:
U1
Reference voltage of fundamental wave
Ix1p
Full current peak of fundamental wave
Ir1p
Resistive current peak of fundamental wave
Ic1p
Capacitive current peak of fundamental wave
Φ
The angle of fundamental full current advanced
