Active Member
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[China]
Address: 806, No.24 Nanlian Road, Nanlian Community, Longgang Street, Longgang District, Shenzhen City, 518116 China
Contact name:William Wang
HAOMAI ELECTRIC TEST EQUIPMENT CO.,LTD |
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Earth Resistance and Soil Resistivity Tester
Model: GRT-200
The GRT-200 offers a comprehensive solution to your earth
resistance and soil resistivity testing needs. With an IP54 rated
enclosure it is the genuinely outdoor instrument. The instrument
provides all the functions required for ground system testing:
earth resistance measurement by four-wire, three-wire or two-wire
method, attached auxiliary ground rod, ground noise voltage
measurement and soil resistivity measurement.
The clear, easy-to-read display provides excellent contrast and
viewing angle making the instrument ideally suited to outdoor use.
The display is backlit, extending the operational environment of
the instrument to cable cellars and other dark locations.
The GRT-200 offers a wide measurement range of 0.01 Ω a to 30.00
kΩ, ground noise voltage measurement from 0.00 V to 100.0 V and
Soil resistivity measurement from 0.00 Ωm to 9999 kΩm. Accurate
results can be obtained in electrically noisy environments since
the instrument is capable of rejecting noise voltages of 20 V peak
to peak.
Main Features
1)Able to measure earth resistance by four-wire, three-wire or
two-wire method
2)Able to measure soil resistivity
3)Able to measure ground voltage and AC voltage
4)Test frequency: 128Hz
5)Short circuit test current: > 20mA(sinewave)
6)4-bit large backlit display screen
7)Rugged carry case
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 |
| 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) |
Earth Resistance and Soil Resistivity Tester GRT-200 is reliable
instrument for measuring earth resistance by four-wire, three-wire
or two-wire method and soil resistivity.
