Overview
This instrument is a four terminal digital tester designed for precise earth resistance and soil resistivity measurement. It offers a wide measuring range up to 20.99 kΩ with a minimum resolution of 0.01 Ω and supports automatic soil resistivity measurement up to 395.6 kΩ·m. The device features interference voltage detection up to 30 Vrms, operating frequency between 400 Hz and 500 Hz, and selectable measuring voltages with automatic adjustment for improved accuracy. With a maximum test current of 80 mA and advanced FFT filtering technology, it effectively reduces noise interference while ensuring stable and reliable performance. Additional functions include residual resistance compensation, data storage capacity of up to 1000 sets, and compliance with CAT IV 150V and CAT III 300V safety standards, making it suitable for industrial and field applications.
Features
- 4 terminal earth resistance measurement range up to 20.99 kΩ with 0.01 Ω resolution
- Auto-ranging soil resistivity measurement up to 395.6 kΩ·m
- Advanced FFT-based filtering to minimize noise interference
- Test current up to 80 mA with automatic voltage selection
- Conforms to CAT IV 150 V and CAT III 300 V safety standards
- Data memory capacity of 1000 sets for long-term recording
- Compact HD LCD display for clear and accurate readings
Technical Specifications
| Measuring Range (Resistance) | 2 Ω to 20.99 kΩ |
| Resolution | 0.01 Ω, 0.1 Ω, 1 Ω, 10 Ω, 100 Ω |
| Soil Resistivity Measurement | 0 to 395.6 kΩ·m |
| Test Voltage | 0 to 30 Vrms |
| Measurement Frequency | 400 Hz to 500 Hz |
| Test Current | Maximum 80 mA |
| Voltage Selection | Auto or manual; 10 Vrms at 94 Hz, 105 Hz, 111 Hz, 128 Hz |
| Noise Filtering | FFT-based filtering method |
| Data Storage | 1000 sets |
| Ground Resistance Test Method | Voltage drop method (probe current and voltage testing) |
| Safety Standards | CAT IV 150 V, CAT III 300 V |
| Dimensions | 5.91 in x 3.94 in x 2.76 in (15 cm x 10 cm x 7 cm) |
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