The grounding resistance tester is a professional instrument for testing the grounding resistance of electrical equipment. It improves the circuit, structure and process of the traditional grounding resistance tester, in addition, the style is beautiful and practical, the function is more complete, the accuracy is higher, the operation is more convenient and reliable, the dust-proof and moisture-proof structure is more suitable for field use. It can be used for grounding resistance values of various power systems, power equipment, lightning protection equipment and other grounding systems, as well as AC voltage. Features: 1. Display: 90mm x 48mm window LCD display, the maximum display "1999". 2. Over-range indication: When the upper limit is exceeded, only the highest digit displays "1". 3. Under-voltage indication when there is insufficient voltage. 4. Power consumption: The power consumption is