This specialized instrument is used for measuring the grounding resistance of ground grids and the grounding continuity between grounding points.
It adopts frequency conversion anti-interference technology, does not require large current measurements, and can obtain accurate 50Hz data even in environments with strong interference, such as substations. Measurement results are displayed on a large LCD screen and can be printed out using the built-in micro printer. The instrument can simultaneously measure grounding impedance and grounding resistance, providing a more accurate reflection of the actual characteristics of the ground grid.
| Parameter | Specification |
|---|---|
| Impedance Measurement Range | 0~50000, Resolution: 0.001mΩ |
| Measurement Error | ±(reading × 2% + 0.005Ω) |
| Test Current Waveform | Sine wave |
| Test Current Frequency | 45, 50, 55, 60, 65Hz |
| Single Frequency | 45/55Hz, 55/65Hz, 47.5/52.5Hz automatic dual frequency |
| Output Current | 1, 2, 3, 4, 5A; Maximum Output Voltage: 450V |
| Measurement Line Requirements | Current line copper core cross-sectional area ≥1.5mm², Voltage line copper core cross-sectional area ≥1.0mm² |
| Power Supply | AC180~270V, 50/60Hz |
The frequency selective voltmeter can only be used with the large ground grid earth resistance tester for anti-interference measurements of ground surface potential gradient, step voltage, and contact voltage difference.
| Parameter | Specification |
|---|---|
| Measurement Range | 0-600V |
| Accuracy | ±Reading × 1% + 0.1mA |
| Maximum Resolution | 0.001mV |
| Input Impedance | >500kΩ |
| Human Body Simulation Resistance | 1500Ω ±5% |
| Measurement Frequency | Corresponds to the ground grid earth resistance tester, interference suppression ratio: ≥80dB |
| Working Time | About 8 hours |
| Charging Time | About 3 hours |
| Power Supply | 220V ±10%, 50Hz/60Hz |
| Weight | 18kg |
We are an integrated trade and manufacturing company with our own factory.
Yes, we accept OEM/ODM/OBM and can customize the built-in software of the product according to the customer's special requirements.
In normal circumstances, products in stock can be received within 5 to 7 days via the fastest international express. Other situations may vary depending on the quantity of products ordered, whether there are special customization requirements, and the delivery time chosen.
We have professional internal and external packaging to ensure the safety and stability of the products during transportation. For fragile or other special parts, we will include an extra set to ensure that the customer can use the product immediately upon receipt.
For quality issues that are not caused by human error, we provide a one-year warranty from the time the product is delivered, and lifetime technical support. Other after-sales issues will be addressed by our professional technical staff within 24 hours. The product comes with a user manual and an operation video.
