| Basic error and performance index under the reference condition | |||
| Measuring function | Measuring range | Precision | Resolution |
| Ground resistance (R) | 0.00Ω～30.00Ω | ±2%rdg±3dgt | 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=2πaRa:1m～100m;π=3.14) | 0.01Ωm |
| 100.0Ωm～999.9Ωm | 0.1Ωm | ||
| 1000Ωm～9999Ωm | 1Ωm | ||
| Soil resistivity (ρ) | 10.00kΩm～99.99kΩm | (ρ=2πaRa:1m～100m;π=3.14) | 10Ωm |
| 100.0kΩm～999.9kΩm | 100Ωm | ||
| 1000kΩm～9000kΩm | 1kΩm | ||
| Ground voltage | AC0.0～600V | ±2%rdg±3dgt | 0.1V |
| Base condition | |||
| The amount of influence | Base condition | Working conditions | Note |
| Ambient temperature | 23℃±1℃ | -10℃～40℃ | ---- |
| Ambient humidity | 40%～60% | ＜80% | ---- |
| Storage temperature and humidity | -20℃ ~ 60℃; 70percentrh below | ||
| Instrument operating voltage | 9V±0.1V | 9V±1.5V | ---- |
| Auxiliary grounding resistance value | ＜100Ω | ＜30kΩ | rC、rP |
| Interference voltage | None | ＜20V | ---- |
| Interference current | None | ＜2A | ---- |
| Electrode spacing when measuring R | a＞5d | a＞5d | ---- |
| Electrode spacing for measuring ρ | a＞20h | a＞20h | ---- |
| Measurement mode | Precision 4-wire, 3-wire method measurement, simple 2-wire measurement of grounding resistance |
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| Measuring method | Ground resistance: rated current polarizing method, measuring current 20mAMax |
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| Soil resistivity: quadrupole method (Wenner method) |
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| Voltage to ground: average rectification (P(S)-ES interface) |
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| Test frequency | 128Hz/111Hz/105Hz/94Hz(AFC) |
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| Short circuit test current | AC20mAmax |
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| Open circuit test voltage | AC40Vmax |
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| Test voltage waveform | Sine wave |
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| Electrode spacing range | Can be set 1m ~ 100m |
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| Auxiliary grounding test | 具有Auxiliary grounding resistance value测试功能,0.00KΩ～30kΩ(100R+rC<50kΩ,100R+rP<50kΩ) |
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| Shift gears | Ground resistance: 0.00Ω ~ 30.00kΩ automatic shift, soil resistivity: 0.00Ωm ~ 9000kΩm automatic shift |
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| Backlight | 可控白屏Backlight,适合昏暗场使用 |
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| Disy mode | 4位大LCD显示,白屏Backlight |
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| Measurement indication | Measurement LED flicker,LCD backward count, progress bar diagram indication |
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| The number of measurements | More than 5000 times (short circuit test, test 1 time, stop 30 seconds to test again) |
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| Line voltage | Measurement below AC600V |
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| Communication interface | With USB interface, software monitoring, storage data can be uploaded to the computer, save print |
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| Data storage | 300 groups, "MEM" storage indicator, disy "FULL" symbol indicates that the storage is full |
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| Data retention | The "HOLD" symbol indicates -- when holding data |
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| Data retrieval | The "READ" symbol indicates -- when consulting data |
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| Overflow disy | 量程溢出时“OL”符号指示 |
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| Interference test | 自动识别干扰信号,Interference voltage高于5V时“NOISE”符号指示 |
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| Alarm function | When the measured value exceeds the alarm setting value, "toot toot toot" alarm prompt |
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| 电池电压 | When the battery voltage drops to about 7.5V, the battery low voltage symbol "" is disyed to remind you to rece the battery |
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| Overload protection | Measuring ground resistance: C(H)-E,P(S)-ES AC280V/3 s between ports |
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| Insulation resistance | More than 20MΩ (500V between the circuit and the shell) |
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| Withstand voltage | AC3700V/rms(between circuit and housing) |
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| Power supply | DC9V(Alkaline dry battery LR141.5V6 section, 300 hours of continuous standby) |
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| LCD size | 128mm×75mm |
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| LCD disy domain | 124mm×67mm |
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| Fuselage size | Height width: 212mm×175mm×76mm |
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| Fuselage weight | Instrument: 950g test wire: 1560g auxiliary ground rod: 935g(4) |
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| Standard parts | Auxiliary ground rod, standard test cable, simple test cable, alkaline dry battery, monitoring software CD,USB communication cable |
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| Standard packing | User manual, warranty card, instrument case |
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