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HF-GT-211 Ground Bond Tester
This portable ground bond tester accurately measures protective earth bonding resistance of electrical devices. It checks grounding connection reliability, complies with international safety standards, widely used for factory production inspection and safety certification testing.
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Ground Bond Tester is a dedicated safety testing instrument designed to measure the resistance of protective earth bonding connections on electrical appliances, power equipment and metal enclosures. By outputting constant large test current, it precisely detects continuity and resistance values of grounding circuits, verifying whether earthing connections are firm enough to effectively prevent electric leakage and electric shock hazards under fault conditions.
Compliant with IEC, UL, GB international electrical safety certification standards, this portable device features digital reading, stable output and robust waterproof casing. It is widely applied in factory batch production inspection, quality control laboratories, electrical safety certification tests and on-site periodic safety checks for household appliances, industrial machinery, medical electrical devices and power distribution cabinets, serving as essential equipment to guarantee equipment grounding reliability and personal operational safety.
Product Features of HF-GT-211 Ground Bond Tester
- The whole device is controlled by a high-speed single-chip microcomputer, featuring high automation and easy operation.
- Adopts high-frequency switching power supply technology to deliver large output current.
- Equipped with comprehensive protection functions for enhanced operational reliability.
- Fast response speed with automatic real-time data refresh.
- Vertical cabinet design, convenient for field on-site testing.
- Intelligent power management technology keeps the instrument running at minimum power consumption, effectively reducing internal heat generation and saving energy.
- Equipped with dot-matrix LCD display, Chinese menu interface and built-in printout function.
Technical Specifications
| Parameter Item | Specification |
|---|---|
| Output Current | 10A, 20A, 40A, 100A |
| Measuring Range | 10μΩ ~ 100mΩ (100A mode) 50μΩ ~ 500mΩ (40A mode) 100μΩ ~ 1Ω (20A mode) 500μΩ ~ 2Ω (10A mode) |
| Accuracy | 0.2% |
| Resolution | 0.1μΩ |
| Operating Temperature | 0 ~ 40℃ |
| Ambient Humidity | ≤90%RH, no condensation |
| Power Supply | AC220V±10%, 50Hz±1Hz |
Purpose of Ground Bond Tester
Q: What is a Ground Bond Tester used for?
A Ground Bond Tester is used to measure the resistance and continuity of protective grounding connections for electrical equipment. It verifies grounding reliability to prevent electric shock hazards under fault conditions and meets mandatory electrical safety testing and certification requirements.
Q: What output current levels are available?
This tester supports multiple adjustable current ranges including 10A, 20A, 40A and 100A, covering different test requirements of IEC, UL and other international safety standards.
Q: Why are the resistance readings unstable during testing?
Fluctuating data is mainly caused by oxidized test points, poor clip contact, loose wiring or on-site electromagnetic interference. Clean the metal contact surface and firmly clamp the test points to obtain stable and accurate results.
Q: What does high ground bond resistance indicate?
Excessive resistance means the grounding wire is loose, broken or poorly welded. The faulty grounding loop cannot safely discharge fault current, resulting in failure of electrical safety inspection.
Q: Can the tester work continuously on production lines?
Yes. Equipped with intelligent power management technology, the tester effectively reduces internal heat generation and supports long-term continuous operation for factory batch production testing.
Q: What are the standard working environmental conditions?
The tester operates stably at 0°C to 40°C with ambient humidity ≤90% RH (non-condensing). Avoid dusty, corrosive environments and areas with strong electromagnetic interference.
Q: Is regular calibration required?
Annual professional calibration is recommended to ensure long-term measurement accuracy and keep all test results compliant with international electrical safety standards.
Q: Why does the tester show no reading after startup?
Please check whether the AC220V power supply is normal and all test cables are fully connected. If the problem persists, the internal protection circuit may be triggered and requires professional inspection.
Q: Does the tester support data storage and printing?
It features a dot-matrix LCD display and complete menu system, supporting real-time data viewing, automatic data storage and test report printing for quality record archiving.
Q: What are the advantages of high-frequency switching power supply?
The high-frequency switching power supply ensures stable large-current output, improves testing accuracy, enhances overall operational stability and prolongs the service life of the instrument.
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