ZQ2501 type grounding resistance testerDetailed product description：

The ZQ2501 grounding resistance tester is an intelligent high-precision digital grounding resistance tester with strong resistance to power frequency interference and mutual inductance. It can measure the grounding status of large power plants and substations' grounding grids using internal power sources without power outages, making it safe and convenient to use

Main technical characteristics
Measurement range: 0-1000W
Resolution: 0.001W
Accuracy: ± 2%
The impact of power frequency interference voltage: The error caused by 50V power frequency interference voltage shall not exceed half of the allowable error.
Resistance to mutual inductance between overhead lines: equivalent to the error caused by mutual inductance between 10km long overhead lines, with a variation not exceeding 1/2 of the allowable error.
Testing methods: Two types (Method 1 and Method 2)
Display mode: Four digit LED display, decimal point automatically floating.
Working power supply: DC 12V. (Equipped with nickel cadmium battery pack)
Charging power supply: AC 220V.
Environmental temperature: 0 ℃ -40 ℃.
Relative humidity: 90%.