1. It can be used to measure the ground resistance value of various power facility wiring, electrical equipment, anti thunder equipment and other grounding devices, and it can also measure ground voltage.
2. This professional digital insulation earth resistance tester has stableperformance and reliable result. A variety of gears are suitable for more environments, and the voltage and resistance gears can be switched.
3. Reinforced insulation safety structure and double insulation safety make the measurement safer and more assured. 20 sets of data can be stored.
4. It has more complete functions, higher accuracy. It is equipped with a warning of poorcontact of the test line, over range display, and over range display OL.
5. Comes with a portable carrying case​, easy to carry, more convenient and reliable for operation and more suitable for outdoor use.

Spec:
Item Type: Earth Resistance Tester
Material: ABS+Alloy Steel
Color: As shown in the picture
Model: GT5105A
Battery: 1.5V AAx6 (not included)
Application: Ground resistance measurement
Ground Voltage Measurement: Average response
Grounding Resistance Measurement: Test signal frequency: about 820Hz, current: 20Ω about 3.2mA
Working Temperature: 5~40℃
Relative Humidity: ≤80%RH (no fog)
Altitude: ≤2000m
Storage Conditions: Temperature: -20~60℃; humidity: ≤70%RH (no fog)
Grounding Resistance Gear: 200V AC (10s)
Grounding Voltage Gear: 400V AC (30s)
Insulation Resistance: The insulation resistance between the measuring circuit and the shell​ is not less than 20MΩ
Basic Function Range Accuracy Resolution
Ground Resistance 20Ω ±(2%+10) 0.01Ω
200Ω ±(2%+3) 0.1Ω
2000Ω ±(2%+3) 1Ω
2000Ω (two wires) ±(2%+5) 1Ω
Ground Voltage 200V ±(2%+5) 0.1V

How to Use:
1. Hit the P and the grounding nails into the depths of the ground. They are arranged in a row with the equipment to be tested, and they are separated