Thank you for using national patent-BY2571-Ⅱ Digital Ground Resistance Tester (97 years by the National ZL97240811.8). 

 The product is you measure the earth resistance of various devices ideal replacement product! When you use this instrument, please read the instructions carefully. 

 I. Introduction 

 1, the use of 

 This table applies to electric power, telecommunications, railway, petroleum, chemical, telecommunications, mining and other departments of various equipment grounding resistance measurement and resistance measurement at the end of the conductor resistance, the table can also measure soil resistivity and ground voltage. 

 2, the working principle 

 Works within the grounds of several DC / AC converter to the DC into AC 

 Low-frequency constant current through auxiliary ground electrode C and E composition of the measured object circuit to generate AC voltage drop across the measured object, the auxiliary ground electrode P into the AC amplifier, and then by 

 Through the detector into the first table shows. Override switch available with three different volume limit: 0-2Ω ,0-20Ω ,0-200Ω. 

 3, Features 

 The instrument to stop with the traditional hand-cranked device compared with the following characteristics: 

 l application of the DC / AC conversion technology, three-terminal set button, volume button four-terminal method as a whole, the use of power to AC and DC. 

 l trace detection methods using phase-locked, and switched-capacitor filter, the anti-interference ability. 

 l abandon the traditional manual crank power generation, no human acting. 

 l do not need to manually adjust the balance, clear touch panel key operation, LCD digital display makes the measurement very easily and quickly, eliminating the pointer instrument of visual error. 

 l allow the auxiliary grounding resistance much better to ensure the accuracy and high resolution. 

 l In addition to test ground resistance, but also to test group of low-voltage electrical conductor resistance value. Group rates and the exchange of soil electrical ground voltage