| Functions |
Ground resistance, soil resistivity, DC resistance, on-resistance, equipotential connection resistance, ground voltage, AC current, leakage current measurement |
| Power supply |
DC 7.4V 1.8Ah rechargeable lithium battery |
| Back light |
Controllable white screen backlight, suitable for use in dark places |
| Measurement |
Precision 4-wire, 3-wire method measurement, simple 2-wire method, selection method, double clamp method to measure grounding resistance |
| Measurement methods |
Two, three and four wire method measurement: pole changing method, short circuit measurement current 20mA Max |
| Selection method measurement: pole changing method, short circuit measurement current 20mA Max |
| Double clamp method: non-contact mutual inductance measurement method, test current 1mA Max |
| Soil resistivity: quadrupole method (Wenner method) |
| DC resistance: pole changing method |
| AC current: average rectification (clamp) |
| Voltage to ground: average rectification (between P (S) -ES interface) |
| Range |
Two, three, four wire method to measure grounding resistance (R): 0.000Ω ~ 30000Ω |
| Selection method to measure grounding resistance (Re): 0.00Ω ~ 3000Ω |
| Double clamp method to measure grounding resistance (Re): 0.01Ω ~ 200Ω |
| Double clamp method to measure grounding resistance (Re): 0.01Ω ~ 200Ω |
| Ground voltage (50Hz / 60Hz): AC 0.0 ~ 100.0V |
| Alternating current (50Hz / 60Hz): AC 0.00mA ~ 600.0A |
| Highest resolution |
Two, three, four wire method to measure grounding resistance (Re), DC resistance:0.001Ω(0.000Ω~29.999Ω); 0.01Ω(30.00Ω~299.99Ω)
0.1Ω(300.0Ω~2999.9Ω);1Ω(3000Ω~30000Ω)
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Selection method for measuring grounding resistance (Re):
0.01Ω(0.00Ω~29.99Ω);0.1Ω(30.0Ω~299.9Ω)
1Ω(300Ω~3000Ω)
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Double clamp method to measure grounding resistance (Re):
0.01Ω(0.01Ω~0.99Ω);0.1Ω(1.0Ω~29.9Ω)
1Ω(30Ω~200Ω)
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Soil resistivity (ρ):
0.01Ωm(0.00Ωm~99.99Ωm)
0.1Ωm(100.0Ωm~999.9Ωm)
1Ωm(1000Ωm~9999Ωm)
10Ωm(10.00kΩm ~99.99kΩm)
100Ωm(100.0kΩm~999.9kΩm)
1kΩm(1000kΩm~9000kΩm)
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| Ground voltage(50Hz/60Hz): 0.1V |
| AC current(50Hz/60Hz): 0.01mA |
| Precision |
Two, three, four wire method to measure grounding resistance (Re), DC resistance (R-):
±2%rdg±0.05Ω (0.000Ω~29.999Ω)
±2%rdg±3dgt (30.00Ω~299.99Ω)
±2%rdg±3dgt (300.0Ω~2999.9Ω)
±4%rdg±3dgt (3.000kΩ~30.00kΩ)
Note: 1. Additional error at rC max or rP max≤±5%rdg±5dgt.(rC max:4kΩ+100R＜50kΩ, rP max:4kΩ+100R＜50kΩ)
2. Additional error at 5V interference voltage≤±5%rdg±5dgt
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Selection method for measuring grounding resistance (Re):
±2%rdg±5dgt(0.00Ω~29.99Ω)
±2%rdg±3dgt(30.0Ω~299.9Ω)
±2%rdg±3dgt (300Ω~3000Ω)
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Double clamp method to measure grounding resistance (Re):
±10%rdg±5dgt(0.01Ω~100Ω)
±20%rdg±5dgt(101Ω~200Ω)
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Soil resistivity (ρ): according to the measurement accuracy of R
(ρ=2πaR a:1 m~100m；π=3.14)
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| Ground voltage(50Hz/60Hz): ±2%rdg±3dgt |
| AC current(50Hz/60Hz): ±2%rdg±3dgt |
| Test voltage waveform |
Sine wave |
| Test frequency |
128Hz/111Hz/105Hz/94Hz(Automatic frequency selection) |
| Short circuit test current |
AC 20mA max |
| Open circuit test voltage |
AC 40V max |
| Electrode spacing |
1m~100m |
| Display mode |
6-digit large LCD display with backlight |
| Measurement instructions |
LED flashing indication during measurement, LCD countdown display |
| LCD size |
128mm×75mm |
| LCD display |
124mm×67mm |
| Size |
Instrument size: length, width and height 320mm × 275mm × 145mm |
| Current clamp: length, width and height about 220mm × 100mm × 27mm |
| Package dimensions |
Outer package: length, width and height about 400mm × 245mm × 335mm |
| Standard test line |
Red 15m, Black 15m, Yellow 10m, Green 10m |
| Simple test line |
2 bars: red 1.6m, black 1.6m |
| Auxiliary ground rod |
4 piece:φ10mm×150mm |
| Current clamp |
2 pcs: CT1 clamp red black plug, CT2 clamp blue black plug |
| Current clamp caliber |
φ52mm |
| Current clamp caliber |
1000:1 |
| Current clamp lead |
Length 2m |
| Measure time |
AC current: about 2 times / second;
Ground voltage: about 2 times / second;
Ground resistance: about 7 seconds / time
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| Measurement times |
More than 5000 times (short circuit test, test once, stop for 30 seconds and then test) |
| Line voltage |
Measurement below AC 100V |
| Communication Interface |
With USB interface, the stored data can be uploaded to the computer, save and print |
| Communication line |
1 USB communication line, 1.5m long |
| Data retention |
"HOLD" symbol indicates when holding data |
| Data storage |
2000 groups, "MEM" storage indication, display "FULL" indicates that the storage is full |
| Data access |
"READ" symbol indicates when checking data |
| Overflow display |
"OL" symbol indication when over-range overflow |
| Current clamp low current indication |
When selecting the method or the double clamp method, when the current signal received by the CT2 clamp is lower than 0.5mA, the symbol "" is displayed. At this time, the clamp direction of the CT2 current clamp should be checked |
| Interference test |
Automatically identify the interference signal, the interference voltage is higher than 5V "NOISE" symbol indication |
| Auxiliary ground test |
With auxiliary earth resistance value test function, 0.00kΩ~30.00kΩ(100R+rC<50kΩ,100R+rP<50kΩ) |
| Alarm function |
When the measured value exceeds the alarm setting value, "beep--beep--beep--" alarm prompt |
| Battery voltage |
When the battery voltage is insufficient, the battery voltage low symbol is displayed to remind the battery to charge. |
| Automatic shut-down |
Automatic shutdown after 15 minutes |
| Working current |
Standby: 25mA Max (backlight off);
Backlight: 25mA Max (separate backlight power consumption);
When measuring: 150mA Max (backlight off)
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| Weight |
Instrument: 2.66kg (including battery) |
| Total weight: 7.87kg (including packaging) |
| Tool box |
Special toolbox design, can bear 200kg |
| Working temperature and humidity |
-10 ℃ ~ 40 ℃; below 80% rh |
| Storage temperature and humidity |
-20 ℃ ~ 60 ℃; below 70% rh |
| Overload protection |
Measurement of grounding resistance: AC 280V / 3 seconds between C (H) -E, P (S) -ES ports |
| Insulation resistance |
20MΩ or more (500V between circuit and case) |
| Withstand |
20MΩ or more (500V between circuit and case) |
| Electromagnetic characteristics |
IEC61326(EMC) |
| Suitable for safety regulations |
IEC61010-1 (CAT Ⅲ 300V, CAT IV 150V, pollution degree 2);
IEC61010-031; IEC61557-1 (ground resistance);
IEC61557-5 (soil resistivity);
JJG366-2004 (ground resistance meter);
JJG1054-2009 (clamp ground resistance meter).
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