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The HZRC300 Electric Clamp-On Earth Resistance Tester is a high-performance, portable device designed for measuring ground resistance and loop resistance in various fields such as power systems, telecommunications, meteorology, oil fields, construction, and industrial electrical equipment. This tool allows for quick and safe measurements without the need to disconnect grounding wires or use auxiliary electrodes, making it ideal for environments where traditional methods are impractical or unsafe.
Key features include:
- **Model No.:** L747 HZRC300
- **Control:** Manual Control
- **Power Source:** 6VDC, 4 AA Alkaline Batteries
- **Measuring Voltage Range:** 15V / 100V / 300V / 600V
- **Measuring Capacitance Range:** 40Hz – 100kHz
- **Trademark:** Huadian
- **Origin:** Dongguan, China
- **Display:** Digital
- **Weight:** 1160g (with batteries)
- **Measuring Current Range:** 0.0 – 20.0 A
- **Measuring Resistance Range:** 0.01 – 1200 Ω
- **Measuring Inductance Range:** 9.999 Hz – 9.999 MHz
- **Transport Package:** Carton Box with Foam Inside
- **HS Code:** 9030339000
This clamp-on earth resistance tester can measure ground faults that are not detectable using conventional methods. It provides accurate readings of the combined ground resistance and lead resistance, ensuring reliable performance in complex environments.
### Main Technical Specifications
| Parameter | Specification |
|----------|---------------|
| Resistance Range | 0.01–1200 Ω |
| Resistance Resolution | 0.001 Ω |
| Highest Resistance Accuracy | ±1% ±0.01 Ω |
| Alarm Threshold Setting Range | 1–199 Ω |
| Alarm Sound and Light | "Beep-beep-beep" tone + flashing alarm symbol |
| Interference Signal Recognition | "Beep-beep-beep" tone + NOISE symbol blinking |
| Working Temperature & Humidity | -20°C – 55°C; 20%RH – 90%RH |
| LCD Screen | 4-digit display, 47mm × 28.5mm |
| Clamp Size | 65mm × 32mm |
| Tester Weight | 1160g (with batteries) |
| Clamp Dimension | 285mm × 85mm × 56mm |
| Protection Level | Dual Insulation |
| Structural Feature | Clamp CT |
| Shifting | Automatic |
| External Magnetic Field | <40A/m |
| External Electrical Field | <1V/m |
| Single Measurement Time | 0.5 seconds |
| Resistance Measurement Frequency | >1kHz |
| Measured Current Frequency | 50/60Hz (auto) |
| Low Battery Indication | Low battery symbol appears when voltage drops below 5.3V |
| Memory Full Indication | MEM symbol blinks when memory is full |
| Over Range Indication | "OLΩ", "L0.01", or "OL A" displayed |
| Auto Power-off | 5 minutes after boot-up |
| Power Consumption | Max 50mA, continuous operation up to 30 hours |
| RS232 Interface (Optional) | Data can be uploaded to a computer for report generation |
| Safety Standards | IEC1010-1, IEC1010-2-032, Pollution Level 2, CAT III (600V) |
| Accessories | 1 meter, 1 test ring, 1 meter suitcase |
The HZRC300 is an essential tool for engineers and technicians who require fast, accurate, and safe ground resistance testing in challenging environments. Its advanced design ensures reliability, ease of use, and long-term durability. Whether you're working on power grids, telecom infrastructure, or industrial sites, this clamp-on earth resistance tester offers a powerful solution for all your grounding needs.
July 18, 2025