The KD2678 ground resistance tester is used to measure the grounding resistance inside electrical equipment. It reflects the (contact) resistance between the exposed conductive parts of the electrical equipment and the main grounding terminal of the electrical equipment. To eliminate the influence of contact resistance on the test, the ground resistance tester adopts a four-terminal measurement method. That is, a current is applied between the exposed conductive part of the electrical appliance under test and the main grounding terminal, and then the voltage at these two ends is measured to calculate the resistance value.

The KD2678 ground resistance tester is designed in accordance with international and domestic safety standards such as GB, IEC, ISO, BS, UL, and JIS. The grounding resistance index is one of the important indicators for measuring the safety performance of various electrical equipment. It measures the resistance of the grounding circuit under a large current (25A or 10A), and is also a test of the grounding circuit's ability to withstand large currents, in order to avoid personal injury when the insulation performance declines (or is damaged).

This tester is developed and produced to meet the above requirements and provide high-performance testing instruments for production workshops and experimental departments. This instrument has low requirements for power supply voltage, high measurement accuracy, fast speed, and is easy to use. It is suitable for use in laboratories with high requirements and automatic testing lines. The open-circuit alarm selection function (i.e., open-circuit alarm) can conveniently determine whether the instrument is operating in a normal testing state. Users can choose whether this function is needed based on their actual requirements. This instrument features a three-and-a-half-digit digital display, making reading convenient. With an optimized design, the entire machine has excellent reliability and stability.

Technical Specification
Measurement range: 0-200mΩ (15A) Accuracy: 5%FS 0-600mΩ (10A) Accuracy: 5%FS
2. Test voltage: ≤12V AC
3. Test current: AC 5-30A; Accuracy: 5%FS;
4. Test time: 1 second to 99 seconds, continuous setting and manual operation.
5. Overcurrent alarm: >30A AC
6. Alarm resistance value: 0-200mΩ (AC 15A) continuously adjustable accuracy: 5%FS 200-600mΩ (AC 10A) continuously adjustable accuracy: 5%FS
7. Power Supply: 198-242V AC 47.5-52.5Hz
8. Working conditions: Ambient temperature :0-40℃, Relative humidity: ≤75%RH
9. Volume: 335mm x 130mm x 325mm
10. Weight: Approximately 12 Kg