Marmonix MEG825 Clamp on Ground Tester
The Marmonix MEG825 Series is a cutting-edge ground tester designed for precise on-site measurements of earth resistance, soil resistivity, current, and voltage. With advanced FFT and AFC technologies, it ensures high accuracy and reliability, even in complex grounding systems. Its Bluetooth and USB connectivity, along with a 2.5-inch LCD display, make it versatile and user-friendly for various industrial applications.
2/3/4Wires Combined Clamp on Ground Tester Marmonix MEG825
The MEG825 Series 2/3/4Wires Combined Clamp-On Ground Tester is a state-of-the-art instrument specifically designed for on-site measurement of earth resistance, soil resistivity, earth current, and earth voltage. Incorporating advanced digital processing technology, this tester supports multiple measurement methods, including 2-wire, 3-wire, 4-wire, and selection methods, making it versatile for various applications.
With Fast Fourier Transform (FFT) and Automatic Frequency Control (AFC) technologies, the MEG825 boasts excellent anti-interference capabilities, environmental adaptability, and high test consistency. These features ensure exceptional precision, stability, and reliability for long-term use. Its large-caliber current clamp design allows users to measure the grounding resistance of large-sized ground down leads, single-point grounding systems, grid grounding systems, and complex grounding structures without disconnecting parallel connections, significantly improving measurement convenience.
The MEG825 is equipped with a 2.5-inch colorful LCD display, providing clear data visualization. It features a storage capacity for 500 test results, complete with date and time stamps, and offers clock functionality. Its Bluetooth communication function enables seamless testing and data retrieval via Android mobile devices after installing the dedicated app, delivering a modern and user-friendly experience. Additionally, the USB interface allows data upload to a PC, where communication software facilitates reading, saving, reporting, and printing historical records.
This versatile tester includes a host machine, test wires, auxiliary ground rods, data software, and communication cables, making it a comprehensive solution for grounding performance testing. It is widely used across industries such as power, telecommunications, meteorology, oil fields, construction, lightning protection, and industrial electrical equipment, offering a perfect blend of functionality, convenience, and precision.
Marmonix MEG825 Series Technical Specifications
| Model | Resistance Range | Soil Resistivity Range | Earth Current Range | Earth Voltage Range | Bluetooth |
|---|---|---|---|---|---|
| MEG825 | 0.00Ω ~ 20kΩ | 0Ωm ~ 9999kΩm | 0.000mA ~ 20A | 0.0V ~ 600.0V | Yes |
| MEG825-B | 0.00Ω ~ 200kΩ | 0Ωm ~ 9999kΩm | 0.000mA ~ 45A | 0.0V ~ 600.0V | Yes |
Base and Working Conditions
| Influence Quantity | Base Condition | Working Conditions | Remark |
|---|---|---|---|
| Ambient Temperature | 23℃ ± 1℃ | -10℃ ~ 40℃ | —- |
| Ambient Humidity | 40% ~ 60% | <80% | —- |
| Working Voltage | DC 3.8V ± 0.2V | DC 3.5V ~ 4.2V | —- |
| Auxiliary Earth Resistance | <100Ω | <5kΩ | —- |
| Interference Voltage | Should avoid | <5V | —- |
| Interference Current | Should avoid | <1A | —- |
| Electrode Distance (R) | a > 5d | a > 5d | —- |
| Electrode Distance (ρ) | a > 20h | a > 20h | —- |
General Specifications
| Parameter | Details |
|---|---|
| Power Supply | DC 3.7V 2600mAh rechargeable battery (Full charge: ~4.2V) |
| Display Mode | 2.5-inch colorful LCD screen |
| Earth Resistance Measurement Method | Clamp method, 2-wire, 3-wire, 4-wire, and selection methods |
| Test Frequency | 128Hz / 111Hz / 105Hz / 94Hz (Auto Frequency Control – AFC) |
| Short-circuit Test Current | AC 10mA max |
| Open-circuit Test Current | AC 14V max |
| Electrode Distance Range | 1m – 100m |
| Clamp Size | 65 × 32 mm |
| Tester Dimensions | 307mm (H) × 98mm (W) × 56mm (D) |
| Tester Weight | Clamp tester: 1112g (with battery); Total: 5.1kg (with all accessories) |
| Test Wires | Red: 20m, Black: 20m, Yellow: 10m, Green: 10m |
| Simple Test Wires | Red: 1.6m, Black: 1.6m |
| Auxiliary Grounding Rod | 4PCS: Φ9mm × 230mm |
| Measuring Rate | Earth Resistance: ~15s/test; Earth Current & Voltage: ~2 tests/second |
Earth Resistance Measurement
| Range (Ω) | Accuracy | Resolution (Ω) |
|---|---|---|
| 0.010Ω ~ 0.099Ω | ±(1%rdg + 0.05Ω) | 0.001Ω |
| 0.10Ω ~ 0.99Ω | ±(1%rdg + 0.05Ω) | 0.01Ω |
| 1.0Ω ~ 49.9Ω | ±(1%rdg + 0.5Ω) | 0.1Ω |
| 50.0Ω ~ 99.5Ω | ±(2%rdg + 0.5Ω) | 0.5Ω |
| 100Ω ~ 199Ω | ±(5%rdg + 1Ω) | 1Ω |
| *200Ω ~ 395Ω | ±(10%rdg + 5Ω) | 5Ω |
| *400Ω ~ 590Ω | ±(15%rdg + 10Ω) | 10Ω |
| *600Ω ~ 880Ω | ±(20%rdg + 20Ω) | 20Ω |
| *900Ω ~ 1200Ω | ±(25%rdg + 30Ω) | ~ |
| *1300Ω ~ 1600Ω | ±(30%rdg + 100Ω) | 100Ω |
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