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| Categories | Ground Resistance Testing Equipment | 
|---|---|
| Brand Name: | HAOMAI | 
| Model Number: | GRT-200 | 
| Certification: | ISO9001:2015 | 
| Place of Origin: | China | 
| MOQ: | 1 set | 
| Payment Terms: | T/T | 
| Supply Ability: | 400 sets per month | 
| Delivery Time: | 5-10 working days | 
| Packaging Details: | Transport Case + Carton | 
| Price: | negotiation | 
| Product name: | Earthing Resistance Tester | 
| Ground resistance measurement: | 0.00Ω-30.00kΩ | 
| Soil resistivity: | 0.00Ωm-9999kΩm | 
| Ground voltage: | 0.00V-100.0V | 
| Auxiliary ground impedance: | working condition <5kΩ | 
| Data storage: | 500 data set | 
Multifunctional Ground Resistance Tester
Model: GRT-200
Multifunctional Ground Resistance Tester GRT-200 is designed to measure ground resistance by four-wire method, three-wire method or two-wire method, as well as measure soil resistivity.
Technical Data
| Function | measure ground resistance by four-wire, three-wire or two-wire method, measure soil resistivity, measure ground voltage and AC voltage | 
| Ambient temperature and humidity | 23℃±5℃, 75%rh below | 
| Power supply | DC 6V/4.5Ah lead-acid battery, last more than 100 hours for standby | 
| Interference voltage | <20V (should be avoided) | 
| Interference current | <2A (should be avoided) | 
| Electrode spacing during R measurement | a>5d | 
| Electrode spacing during ρ measurement | a>20h | 
| Auxiliary ground impedance | reference condition <100Ω, working condition <5kΩ | 
| Measurement Range | Ground resistance: 0.00Ω~30.00kΩ | 
| Soil resistivity: 0.00Ωm~9999kΩm | |
| Ground voltage: 0.00V~100.0V | |
| Measurement mode | Precise four-wire or three-wire measurement, simple two-wire measurement | 
| Measurement method | Ground resistance: rated current and pole changing method Soil resistivity: four-pole method Ground voltage: average rectification(S-ES between interface) | 
| Test frequency | 128Hz | 
| Short circuit test current | > 20mA (sine wave) | 
| Open circuit test voltage | AC 28V max. | 
| Electrode spacing range | 1m~100m can be set | 
| Gear change | Ground resistance: fully automatic shifting 0.00Ω~30.00kΩ | 
| Soil resistivity: fully automatic shifting 0.00 Ωm~9999kΩm | |
| Backlight | controllable gray screen backlight, suitable for use in dim places | 
| Display mode | 4-bit large LCD display, gray screen backlight | 
| Measurement instructions | LED flashing indicator during measurement | 
| LCD size | 111mm×68mm | 
| LCD display field | 108mm×65mm | 
| Instrument dimensions | LxWxH: 277.2mm×227.5mm×153mm | 
| Standard test leads | 4 pcs: red 15m, black 15m, yellow 10m, green 10m | 
| Simple test leads | 2 pcs: yellow 1.6m, green 1.6m | 
| Auxiliary Ground rod | 4 pcs: φ10mm×200mm | 
| Measuring time | Ground voltage: about 3 times/sec. | 
| Ground resistance / soil resistivity: about 7 sec./time | |
| Line voltage | Measurement below AC100V (ground voltage measurement function can not be used to measure commercial power) | 
| USB interface | With USB interface, software monitoring, storage data can be uploaded to the computer for saving and printing. | 
| Communication cable | 1 pc USB communication cable, length: 1.5m | 
| Data storage | 500 data set. "MEM" is storage indicator, "FULL" symbol indicates that the memory is full. | 
| Data query | "MR" symbol appears | 
| Overflow display | Over-range overflow function: "OL" symbol appears. | 
| Interference test | Automatic identification of interference signals. "NOISE" symbol indicates when the interference voltage is higher than 5V. | 
| Auxiliary ground test | With auxiliary ground impedance test function, 0.00KΩ ~ 30kΩ (Rh max = 3kΩ +100R <50kΩ, Rs max = 3kΩ +100R <50kΩ) | 
| Alarm function | Give alarm when the measured value exceeds the alarm setting value | 
| Battery voltage | Real-time display of battery power, reminding timely charging when battery voltage is low. | 
| Automatic Shutdown | “APO” symbol appears, automatic shutdown after 15 minutes | 
| Power consumption | Standby: 40mA(backlight off) | 
| Turn on backlight: about 43mA | |
| Working: 75mA(backlight off) | |
| Weight | Instrument: 2.45 kg(including battery) | 
| Test leads:1.3 kg | |
| Auxiliary ground rod: 0.85 kg(4pcs) | |
| Working temperature and humidity | -10℃~40℃, 80%rh below | 
| Storage temperature and humidity | -20℃~60℃, 70%rh below | 
| Overload protection | Ground impedance measurement: AC 280V/3 seconds between H-E and S-ES ports | 
| Insulation test | 20MΩ above(500V between circuit and case) | 
| Withstand voltage | AC 3700V/rms(between circuit and case) | 
| EMC | IEC61326 | 
| Safety | IEC61010-1(CAT Ⅲ 300V, CAT IV 150V, pollution level 2) IEC61010-031 IEC61557-1(ground impedance) IEC61557-5(soil resistivity) JJG 366-2004 | 
Measuring Rang and Accuracy
| Test Function | Range | Accuracy | Resolution | 
| Ground resistance (R) | 0.00Ω~30.00Ω | ±2%rdg±5dgt (Note1) | 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 0.00~100.0V | ±2%rdg±3dgt | 0.01V | 
Note 1: Reference conditions: accuracy with Rh Rs < 100Ω
Working conditions: Rh max=3kΩ+100R<50kΩ, Rs max=3kΩ+100R<50kΩ
Note 2: It depends on the measurement accuracy of R.
π=3.14, a: 1 m~100m
Multifunctional Ground Resistance Tester GRT-200 is ideal instrument for measuring ground resistance and soil resistivity.
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