Refine On (Hebei) Electric Power Technology Co., Ltd. is one of the leading manufacturers and suppliers of electrical earth tester in China. If you're going to wholesale durable electrical earth tester, welcome to get quotation from our factory. All customized products are with high quality and competitive price.
The Electrical Earth Tester consists of a main unit, four auxiliary ground spikes, and test leads. The instrument uses a PWM‑controlled current source to generate a stable test current. The large LCD displays resistance, test voltage, and battery status simultaneously. The memory can store up to 500 sets of measurement data. Electrical Earth Tester operates on AC220V ±10% / 50Hz or 8×AA batteries. Operating temperature: 0°C to 40°C, humidity <90% RH.
Product Parameters
|
Parameter |
Value / Specification |
|
Model |
NR3002E |
|
Measurement method |
3‑point / 4‑point (fall‑of‑potential) |
|
Resistance range |
0.01 Ω – 2000 Ω |
|
Accuracy |
±2% of reading ±0.1 Ω |
|
Resolution |
0.01 Ω (up to 20 Ω) |
|
Test frequency |
128 Hz (square wave) |
|
Auxiliary earth resistance tolerance |
<50 kΩ (auto‑warning) |
|
Data storage |
500 records |
|
Display |
LCD with backlight |
|
Power supply |
AC220V ±10% / 50Hz or 8×AA batteries |
|
Dimensions (W×D×H) |
370 × 280 × 260 mm |
|
Gross weight |
10 kg (including accessories) |
|
Operating temperature |
0°C – 40°C |
|
Operating humidity |
<90% RH |
Product Advantages
- High interference rejection: 128 Hz test frequency filters out 50/60 Hz noise.
- Versatile methods: Electrical Earth Tester supports both 3‑point and 4‑point measurements.
- Large data storage: 500 records, uploadable to PC via USB.
- Robust field design: Water‑resistant enclosure and rugged spikes.
- Safety protection: Over‑voltage and mis‑connection warning.
Applications
- Grounding system acceptance testing for substations and transmission towers
- Lightning protection verification for buildings, airports, and telecom base stations
- Soil resistivity surveys for new substation sites
- Periodic grounding resistance measurement in industrial plants
Related Products
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FAQ
Q1: What is the maximum auxiliary earth resistance the tester can tolerate?
A: Up to 50 kΩ. If exceeded, the instrument displays a warning but still provides a measurement.
Q2: Can it measure soil resistivity (4‑point method)?
A: Yes, the NR3002E supports the Wenner 4‑point method. Simply connect four spikes and the tester automatically calculates resistivity in Ω·m.
Q3: How long do the batteries last?
A: Approximately 8 hours of continuous use with alkaline AA batteries. The AC adapter is recommended for extended field work.
Q4: Does the tester include a calibration certificate?
A: Yes, each unit is factory calibrated and comes with a traceable calibration certificate.
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