Product Introduction
The UHV-2571A Ground Resistance Tester is a professional grounding test device developed with microprocessor technology. It is mainly used for grounding performance testing of power systems, communication base stations, substations, gas stations, lightning protection systems, and other grounding devices.
The instrument integrates ground resistance testing, soil resistivity testing, and ground voltage measurement into one unit, supporting 2-wire, 3-wire, and 4-wire measurement methods. It adopts intelligent filtering and anti-interference technology to effectively reduce the impact of on-site interference on test results, providing fast, stable, and reliable data support for the installation, acceptance, maintenance, and preventive testing of grounding systems.
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technische Parameter
| Measuring function | Messbereich | Präzision | Auflösung |
| Ground resistance (R) | 0.00Ω～30.00Ω | ±2%rdg±5dgt (Note 1) | 0,01 Ω |
| 30.0Ω～300.0Ω | ±2 % v.M. ±3 dgt | 0.1Ω | |
| 300Ω～3000Ω | ±2 % v.M. ±3 dgt | 1Ω | |
| 3.00kΩ～30.00kΩ | ±2 % v.M. ±3 dgt | 10Ω | |
| Soil resistivity(ρ) | 0.00Ωm～99.99Ωm | ρ=2πaR (Note 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 | ||
| Ground voltage | AC 0.00～600V | ±2 % v.M. ±3 dgt | 0,01 V |
Notiz:1、Standard condition: Accuracy when Rh Rs<100Ω.
Working conditions: Rh max = 3kΩ+100R < 50kΩ; Rs max = 3kΩ+100R < 50kΩ
2、Depends on the measurement accuracy of R, π=3.14, a:1 m ~ 100m;
General specification
| Work and energy | Two, three, four lines to measure ground resistance, soil resistivity; |
| Grounding voltage and AC voltage measurement | |
| Ambient temperature and humidity | 23℃±5℃, less than 75%rh |
| Leistung | DC 9V 6 LR14 dry battery continuous standby more than 100 hours |
| Interference voltage | < 20V (should be avoided) |
| Interference current | < 2A (should be avoided) |
| Electrode spacing when measuring R | a＞5d |
| Electrode spacing when measuring ρ | a＞20h |
| Hilfserdungswiderstand | The base condition is < 100Ω, and the working condition is < 5kΩ |
| Messbereich | Ground resistance: 0.00Ω to 30.00kΩ |
| Soil resistivity: 0.00Ωm ~ 9999kΩm | |
| Ground voltage: 0.00V to 600V | |
| Measurement mode | Precision 4-wire, 3-wire method measurement, simple 2-wire ground resistance measurement |
| Measurement method | Ground resistance: rated current pole-changing method |
| Soil resistivity: quadrupole method | |
| Ground voltage: Average rectification (between S-ES interfaces) | |
| Test frequency | 128Hz |
| Short-circuit test current | AC > 20mA (sine wave) |
| Open-circuit test voltage | AC 28V max |
| Electrode spacing range | Can be set to 1m ~ 100m |
| Schicht | Ground resistance: 0.00Ω ~ 30.00kΩ automatic shift |
| Soil resistivity: 0.00Ωm ~ 9999kΩm automatic shift | |
| Backlight | Controllable off-white backlight, suitable for use in dim places |
| Anzeigemodus | 4 digit large LCD display with off-white backlight |
| Measurement indication | LED flicker during measurement |
| LCD size | 111mm×68mm |
| LCD display field | 108mm×65mm |
| Meter size | 240mm (L)×188mm (W)×85mm (H) |
| Standard test line | 4 pieces: red 15m, black 15m, yellow 10m, green 10m each 1 piece |
| Simple test line | 2 pieces: yellow 1.5m, green 1.5m each |
| Auxiliary ground rod | 4 roots |
| Measuring time | Voltage to ground: about 3 times/second |
| Ground resistance, soil resistivity: about 7 seconds/time | |
| Ground voltage | AC below 600V measurement (Grounding voltage measurement function cannot be used to measure commercial electricity) |
| Datenspeicher | 500 group, "MEM" storage indicator, showing the "FULL" symbol indicates that the storage is full |
| Data lookup | The "MR" symbol indicates when consulting data |
| Overflow display | The "OL" symbol indicates when an overrange overflow occurs |
| Alarm function | An alarm is issued when the measured value exceeds the alarm setting value |
| Battery voltage | The battery low voltage symbol is displayed |
| Automatic shutdown | "APO" indicates that it automatically shuts down after 15 minutes of startup |
| Energieverbrauch | Standby: Approx. 40mA(backlight off) |
| Turn on the backlight: about 43mA | |
| Measurement: Approx. 75mA(backlight off) | |
| Quality | Meter: 1280g(including battery) |
| Test line: 1300g | |
| Auxiliary ground rod: 720g(4) | |
| Operating temperature and humidity | -10℃ ~ 40℃; Less than 80%rh |
| Storage temperature and humidity | -20℃ ~ 60℃; Below 70%rh |
| Überspannungschutz | Measurement Ground resistance: AC 280V/3 seconds between H-E and S-ES ports |
| Isolationswiderstand | More than 20MΩ (500V between circuit and housing) |
| Spannung standhalten | AC3700V/rms(between circuit and housing) |
| Electromagnetic characteristic | IEC61326(EMC) |
| Fit for safety | IEC61010-1(CAT Ⅲ 300V, CAT IV 150V, pollution degree 2); |
| IEC61010-031; | |
| IEC61557-1(ground resistance); | |
| IEC61557-5(Soil resistivity); | |
| JJG 366-2004; |
Application Scenarios：
Power systems: Used for ground resistance testing of substations, transmission lines, distribution equipment, and grounding grids.
Telecommunications industry: Suitable for testing grounding and lightning protection systems at communication base stations, telecommunication towers, and equipment rooms.
Lightning protection engineering: Used for testing and acceptance of lightning protection systems for buildings, lightning arresters, and grounding devices.
Gas stations and energy facilities: Used for testing lightning protection grounding, anti-static grounding, and related grounding systems.
Building construction: Suitable for construction acceptance of building grounding grids, electrical equipment grounding, and lightning protection systems.
Industrial enterprises: Used for routine maintenance and testing of factory equipment, power distribution systems, and industrial grounding grids.
Grounding engineering: Can be used for soil resistivity testing, providing reference data for grounding electrode site selection, grounding grid design, and construction.
Frequently Asked Questions
Q: How many test methods does the instrument support?
A: It supports 2-wire, 3-wire, and 4-wire test methods. Users can choose the appropriate test method based on different on-site conditions.
Q: Is the display easy to read when used outdoors?
A: The instrument features an LCD display with backlight function, making it easy for users to view test data under different lighting conditions.
Q: Is this instrument suitable for testing newly built grounding systems?
A: Yes. It can be used for ground resistance testing during grounding engineering construction, as well as soil resistivity testing, providing reference data for grounding system design and construction.
Q: Can the electrode spacing be adjusted during testing?
A: Yes. During soil resistivity testing, the electrode spacing can be set according to actual testing requirements, with a range of 1 to 100 meters.
We have our own factory with over 10 years of production experience.We can provide the best professional Earth Resistance Tester for sales and competitive price.And we offer a one-year warranty service for our customers.
