Check the common instrument used to measure the ground resistance
Reference standard: DL/T 845.2-2004, GB/T 17949.1-2000
Note:
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Ground resistance and soil resistivity tester, also known as four-wire ground tester and precision ground resistance tester, is a common instrument for testing and measuring ground resistance. It adopts a large LCD gray screen backlight display and microprocessor technology to meet the requirements of two, three and four-wire test resistance and soil resistivity.
It is suitable for telecommunication, electric power, meteorological, computer room, oil field, power distribution line, tower transmission line, gas station, factory grounding network, lightning rod, etc. Instrument test precision, fast, simple, stable and reliable.
The ground resistance and soil resistivity tester is controlled by the microprocessor, which 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 resistance value of the auxiliary ground electrode. 500 groups of data are stored at the same time. The resistance measurement range is 0.01Ω to 30.00kΩ, and the grounding voltage range is 0.01V to 600V.
Product names：digital grounding resistance tester, four-wire grounding resistance tester, digital grounding resistance tester, digital grounding resistance tester, grounding resistance tester, ground resistance tester, ground resistance tester, ground resistance tester, ground resistance tester, ground pile type grounding resistance tester, digital grounding resistance meter, portable grounding resistance tester, digital grounding resistance meter
| Measuring function | Measuring range | Precision | Resolution |
| Ground resistance (R) | 0.00Ω～30.00Ω | ±2%rdg±5dgt (Note 1) | 0.01Ω |
| 30.0Ω～300.0Ω | ±2%rdg±3dgt | 0.1Ω | |
| 300Ω～3000Ω | ±2%rdg±3dgt | 1Ω | |
| 3.00kΩ～30.00kΩ | ±2%rdg±3dgt | 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%rdg±3dgt | 0.01V |
Note:
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;
| 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 |
| Power | 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 |
| Auxiliary grounding resistance | The base condition is < 100Ω, and the working condition is < 5kΩ |
| Measuring range | 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 |
| Shift | 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 |
| Display mode | 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) |
| Data storage | 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 |
| Power consumption | 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 |
| Overload protection | Measurement Ground resistance: AC 280V/3 seconds between H-E and S-ES ports |
| Insulation resistance | More than 20MΩ (500V between circuit and housing) |
| Withstand voltage | 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; |
1.The appearance of the product is subject to the actual product. Technical parameters and models are subject to change without prior notice.In case of misappropriation or copying, legal liability will be investigated.
2.For more information aboutWuhan UHV, please enter Product center . Service email：info@hvtest.cc
1、The instrument uses a large LCD gray screen backlight display and microprocessor technology, through the microprocessor control of 2-wire, 3-wire, 4-wire French ground resistance test and soil resistivity test.
2、The instrument brings together many grounding test functions to quickly and comprehensively measure various parameters in the grounding network.
3、The instrument has the characteristics of accurate test, fast, simple, stable and reliable.
4、The instrument uses fast filtering technology to minimize interference. 500 groups of data are stored simultaneously.
Enterprise products in strict accordance with international and national standards and rules of industry production, through the national, provincial and municipal electric power research institute and electric power authorities detection, measuring center, fully passed the ISO9001 international quality management system certification, the licence for manufacturing measuring instruments of the People's Republic of China, GB/T19001-2016 quality management system requirements, GB/T24001-2016 environmental management system requirements, GB/T45001-2020 occupational health and safety management system requirements.
email： info@hvtest.cc
Skype： Tina Qiao
+8615172408058
