Using a new type of frequency conversion AC power supply, and the use of microcomputer processing control and signal processing measures, a good solution to the anti-interference problem in the test process, simplify the test operation process, improve the accuracy and accuracy of the test results, greatly reduce the labor intensity of the test personnel and test costs.

1. Good power frequency equivalence of measurement. The test current waveform is sine wave, and the frequency is only 5Hz different from the power frequency, and two frequencies of 45Hz and 55Hz are used for measurement.
2, strong anti-interference ability. The instrument adopts different frequency method and modern software and hardware filtering technology, which makes the instrument have high anti-interference performance, and the test data is stable and reliable.
3, high precision. The basic error is only 0.005Ω, which can be used to measure large ground grids with small ground impedance.
4, can measure the current pile, voltage pile, grounding resistance, step voltage, contact voltage.

1, impedance measurement range: 1MΩ ~ 200Ω
2, resolution: 0.001Ω
3, measurement error: ± (reading × 2% +0.005Ω)
4, anti-interference ability: power frequency :50Hz voltage :10V error :0.001Ω
5, test current waveform: sine wave
6, test current frequency: 45Hz, 55Hz dual frequency
7, maximum output current: 5A, (optional) (45Hz, 55Hz, dual frequency, sine wave)
8, the maximum output voltage: 400V(45Hz, 55Hz, dual frequency, sine wave)
9, current output gear: 5/4.5/4/3.5/3/2.5/2/1.5/1 A, each one with 0.5 A, A total of 9.
10, soil resistivity measurement range: 0 ~ 1000Ω/m (Ohm /m)
11, soil resistivity measurement accuracy: ±2%
12, soil resistivity measurement resolution: 0 ~ 0.01Ω/m (Ohm /m)
13, measurement line requirements: current line copper core cross-sectional area ≥1.5mm2 electrical voltage line copper core cross-sectional area ≥1.0mm2
14, power supply: AC220V± 10%, 50Hz