Products
ZWFR3010E Grounding Resistance Soil Resistivity Tester
Featuring advanced microprocessor technology and a super-large backlit LCD, this product is a professional-grade instrument designed for precision electrical testing.
It fully supports 2-wire, 3-wire, and 4-wire testing methods, enabling quick and easy measurement of earth ground resistance, soil resistivity, and earth voltage.
Company Profile
The company specializes in the research anddevelopment, production, sales, and service of electric power system automation testing equipment, providing customers with one-stop services.
Product Introduction
Ground Resistance • Soil Resistivity Tester also known as Four-Wire Ground Tester, Precision Ground Resistance Tester, etc. It is a commonly used meter for measuring grounding resistance. It adopts a large LCD gray-white screen backlight display and microprocessor technology to meet the requirements of two-wire, three-wire and four-wire test resistance and soil resistivity test. Suitable for telecommunications, electricity, meteorology, computer rooms, oil fields, power distribution lines, iron tower transmission lines, gas stations, factory grounding networks, lightning rods and so on. Instrument testing is precise, fast, simple, stable and reliable.
The Ground Resistance • Soil Resistivity Tester is controlled by the microprocessor and can automatically detect the connection status of each interface and the interference voltage and interference frequency of the ground network, and has the function of testing the auxiliary grounding resistance value. At the same time store 500 sets of data, resistance measurement range: 0.01Ω ~ 30.00kΩ, grounding voltage range: 0.01 ~ 600.0V
Functional Characteristics
Ultra-Wide Range & Auto-Shifting: Earth resistance measurement ranges widely from 0.01Ω∼30.00kΩ, and earth voltage from 0.00V∼600.0V. It features fully automatic shifting upon power-on, making measurements simpler and highly efficient.
Smart Anti-Interference & Auto-Detection： Controlled by a microprocessor, it automatically detects interface connection status, ground network interference voltage (), and interference frequency, ensuring precise and stable data even in harsh environments.
Large Data Storage & Over-limit Alarm: Built-in memory stores up to 500 sets of data, supporting historical data reading with a “FULL” storage indicator. It is equipped with an alarm function for exceeding setting values and an “OL” overflow display.
Multi-Scenario Industrial Applications: Widely applicable for professional testing in telecommunications, electricity, meteorology, computer rooms, oil fields, gas stations, factory grounding networks, and lightning rods.
Technical Parameter
| Function | Two, three, four-wire measure grounding resistance, soil resistivity; Ground voltage, AC voltage |
| Ambient temperature and humidity | 23℃±5℃，below 75%rh |
| Power Supply | DC 9V 6-section LR14 Dry Battery Standby for more than 100 hours |
| Interference voltage | ＜20V(should be avoided) |
| Interference current | <2A (should be avoided) |
| Measure R electrode spacing | a>5d |
| Measured electrode spacing | a>20h |
| Auxiliary Earth Resistance | Reference Conditions <100Ω, Operating Conditions <5kΩ |
| Range | Grounding resistance: 0.00Ω to 30.00kΩ |
| Soil resistivity: 0.00Ωm～9999kΩm | |
| Ground voltage: 0.00V to 600.0V | |
| Measurement Method | Precision 4-wire, 3-wire measurement, simple 2-wire grounding resistance |
| Measuring Methods | Grounding resistance: rated current change method |
| Soil resistivity: four-pole method | |
| Ground voltage: average rectification (S-ES interface) | |
| Test Frequency | 128Hz |
| Short-circuit Test Current | AC >20mA (sine wave) |
| Open Circuit Test Voltage | AC 28V max |
| Electrode Spacing Range | can be set from 1m to 100m |
| Change Gear | Grounding resistance: fully automatic shifting from 0.00Ω to 30.00kΩ |
| Soil resistivity: 0.00 Ωm～9000kΩm automatic shifting | |
| Backlight | Gray screen backlight, suitable for dim places |
| Display Mode | 4-digital super-large LCD display, blue screen backlight |
| Measuring Indicator | During measurement, LED flash |
| LCD Frame Dimension | 111mm×65mm |
| LCD display area | 108mm×65mm |
| Dimension | L×W×H: 240mm×188mm×85mm |
| Standard Test Wire | 4 wires: each for red 20m, black 20m, yellow 10m, and green 10m |
| Simple Test Wire | 2 wires: each for yellow 1.5m and green 1.5m |
| Auxiliary Earthing Rod | 4 PCS |
| Measuring Rate | Voltage to ground: about 3 times/second |
| Earth resistance, soil resistivity: about 7 seconds/time | |
| Circuit Voltage | below AC 600V(The ground voltage measurement function cannot be used to measure commercial power) |
| Data Storage | 500 sets, “MEM” icon storage indicator, flash display “FULL” icon to indicate storage is full |
| Data Read | Data read function: “MR” icon display |
| Overflow Display | Exceeding measuring range overflow function: “OL” icon display |
| Alarm Function | Alarm when the measured value exceeds the alarm setting value |
| Battery Voltage | Low battery voltage symbol display |
| Automatic Shut-down | “APO” instruction, automatically shut down after 15 minutes of power on |
| Power Consumption | Standby: About 40mA (backlight off) |
| Turn on and backlight on: about 43mA | |
| Measurement: about 75mA (backlight off) | |
| Weight | Tester：1230g (including battery) |
| Testing Wires：1300g | |
| Auxiliary earthing rod：720g(4 PCS) | |
| Working Temperature & Humidity | -10℃～40℃；below 80%rh |
| Storage temperature & humidity | -20℃～60℃；below 70%rh |
| Overload Protection | Measuring earth ground resistance: between each interfaces of H-E、S-ES, AC 280V/3 seconds |
| Insulation Resistance | Over 20MΩ(between circuit and enclosure it is 500V) |
| Withstanding Voltage | AC 3700V/rms (Between circuit and enclosure) |
| Electromagnetic Features | IEC61326(EMC) |
| Protection Type | IEC61010-1 (CAT III 300V, CAT IV 150V, Pollution Degree 2); |
| IEC61010-031; | |
| IEC61557-1 (grounding resistance); | |
| IEC61557-5 (soil resistivity); | |
| JJG 366-2004 |
| Measuring Range and Accuracy | |||
| Category | Measurement Range | Intrinsic Error | Resolution |
| Earth Resistance(R) | 0.00Ω-30.00Ω | ±2%rdg±5dgt | 0.01Ω |
| 30.0Ω-300.0Ω | ±2%rdg±3dgt | 0.1Ω | |
| 300Ω-3000Ω | ±2%rdg±3dgt | 1Ω | |
| 3.00kΩ-30.00kΩ | ±4%rdg±3dgt | 10Ω | |
| Soil Resistivity (ρ) | 0.00Ωm-99.99Ωm | ρ=2πaR (remark 2) | 0.01Ωm |
| 100.0Ωm-999.9Ωm | 0.1Ωm | ||
| 1000Ωm-9999Ωm | 1Ωm | ||
| 10.00kΩm-99.99kΩm | 10Ωm | ||
| 100.0kΩm-999.9kΩm | 100Ωm | ||
| 1000kΩm-9999kΩm | 1kΩm | ||
| Earth Voltage | AC 0.00-600V | ±2%rdg±3dgt | 0.01V |
Product Detail
