Technical Specification for TLHG-907 Grounding Downconductor Continuity Tester

Thread Content

1 Scope of supply: 1 TLHG-907 grounding wire conductivity tester. 2 Technical standards followed: \"Regulations for Preventive Testing of Electrical Equipment\" DL/T596-1996. 3 Basic performance parameters of the product: 3.1 Features of the instrument: The newly issued \"Regulations for Preventive Testing of Electrical Safety Equipment\" require that portable short-circuit grounding wires and personal protective grounding wires be subjected to periodic DC resistance tests in groups. The TLHG-907-10A grounding continuity tester is a highly automated portable testing device developed by our company, specifically designed to measure the DC resistance of portable short-circuit grounding wires as well as personal protective grounding wires. This ground continuity tester is controlled by a high-performance microcontroller, enabling an intelligent testing process. It features simple and convenient operation, high accuracy, fast testing speed, good repeatability, and intuitive readings; it is an ideal specialized instrument that meets regulatory requirements, **facilitating the execution of testing tasks and improving work efficiency. The TLHG-907 ground continuity tester meets the requirements of **standard GB6587-86 \"General Guidelines for Environmental Testing of Electronic Measuring Instruments\" and GB6593-86 \"Rules for Quality Inspection of Electronic Instruments\". Product features of the grounding conductor continuity tester:
1. Used for measuring the continuity resistance values between the grounding conductors of various electrical devices in substations.
2. Compact in size, making it easy to carry.
3. LCD display with full Chinese menu; operation is simple and intuitive.
4. Fast testing speed, high accuracy, good data repeatability, and strong anti-interference capability.

3.2 Technical parameters
| Item | Technical specifications and parameters | Remarks |
|------|----------------------------------------|---------|
| Testing current | 10A, 5A, 1A | |
| Measurement range | 1A: 10mΩ~20Ω<br>5A: 1μΩ~4Ω<br>10A: 1μΩ~2Ω | |
| Measurement accuracy | ±0.2% (full scale)<br>±2 digits | |
| Display method | 128×64 dot matrix display | Resistance displayed as 4 1/2 digits |
| Maximum resolution | 0.1μΩ | |
| Power supply | AC 220V±22V, 50Hz±2 Hz | |
| Fuse | 5A | |
| Maximum power consumption | 600W | |
| Operating environment when testing current is 10A | Temperature: 0°～40°<br>Relative humidity: ≤80% | |