Ground Grid Ground Resistance Tester Main Features:
1. Good power frequency equivalence. The test current waveform is a sine wave, with a frequency difference of only 5Hz from the power frequency, using both 45Hz and 55Hz for measurement.
2. Strong resistance to ground voltage interference. This instrument uses the heterodyne method, combined with modern software and hardware filtering technology, giving it high anti-interference performance and stable, reliable test data. The error caused by a 20V power frequency interference voltage is only 0.002Ω.
3. High accuracy. It can be used to measure large ground grids with very small grounding impedance.
4. Powerful functionality. It can measure all characteristic parameters of grounding devices as specified by relevant standards. Not only can it measure grounding impedance, but also the resistance and reactance components.
5. Can measure on-site interference, making it easy for users to estimate measurement errors.
6. Equipped with a disconnection alarm function to avoid erroneous measurements.
7. Simple operation. Full Chinese menu-based operation, directly displaying measurement results.
8. Can save 50 sets of measurement data, and comes with a built-in micro printer for on-site printing of measurement results.
9. Low wiring labor, no need for high-current cables.
10. This instrument is small in size, light in weight, and easy to carry.
Technical Parameters:
1. Impedance measurement range: 0～200Ω
2. Resolution: 0.001Ω
3. Measurement error: ±(reading ×1%+0.002Ω)
4. Ground voltage interference resistance: error caused by 20V power frequency interference voltage is not greater than 0.002Ω (when test current is not less than 2A)
5. Test current waveform: sine wave
6. Test current frequency: 45Hz, 55Hz dual frequency
