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ES3002 Double Clamp Multi-function Earth Resistance Tester

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Ground resistance、Soil resistivity、DC resistance、Ground voltage、AC current

Ambient temperature and humidity

23℃±5℃,below 75%rh

Interference voltage

<20V (should be avoided)

Interference current

<2A (should be avoided)

Measure R electrode spacing


Measured ρelectrode spacing



8.4V lithium battery (built-in)


Controllable  backlight, suitable for use in dim places

measurement mode

Precise four-wire、 three-wire measurement, simple two-wire measurement、Selection method, double clamp method for measuring grounding resistance

Measurement methods

2.3.4-wire method measurement: Polarization method, measuring current 20mA Max

Soil resistivity: four-pole method 

Selectivity Measurement: Polarization Method, Measuring Current 20mA Max

Double clamp method: non-contact mutual inductance measurement method, test current 1mA Max

DC resistance: polarization method

AC current: average rectification (clamp)

Ground Voltage: Average Rectification(between S-ES interface)

Test voltage waveform

Sine wave

Test frequency


Short circuit test current

AC 20mA max

Open circuit test voltage

AC 28V max

Electrode spacing range


Display mode

4-bit large LCD display, with backlight

Measurement instructions

LED flashing indicator during measurement


LCD size


LCD display field


Instrument size


Clamp size


Test line

4 strips:red 15m,black 15m, yellow 10m,green 10m each one

Simple test line

2strips:yellow 1.5m,green 1.5m each one

Auxiliary Grounding rod


Current clamp

2PCS:Banana plug

Current clamp diameter


Current clamp lead

 Length 2m

Measure time

AC current:about 2 times/sec;

Ground voltage:about 2 times/sec;

grounding resistance、soil resistivity: about 7 seconds/time

Line voltage

Measurement below AC100V (ground voltage measurement function cannot be used to measure commercial power)

USB interface

With USB interface, storage data can be uploaded to the computer, save and print

Communication Line

One USB communication line, 1.5m long

Data storage

500 groups, “MEM” storage indicates, flashing “FULL” symbol indicates that the memory is full

Data review

Data review function: “MR” symbol display

Overflow display

Over-range overflow function: “OL” symbol display

Current clamp low current indication

When measuring by the selection method or the double-clamp method, when the current signal received by the current clamp A is lower than 0.5 mA, the symbol “    ” is displayed, and at this time, the clamping direction of the current clamp A should be checked.

Interference test

Automatic identification of interference signals, “NOISE” symbol indication when the interference voltage is higher than 5V

Auxiliary grounding test

With auxiliary ground resistance test function, 0.00KΩ ~ 30kΩ (Rh max = 3kΩ +100R <50kΩ; Rs max = 3kΩ +100R <50kΩ)

Alarm function

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” Indicates, automatic Shutdown After 15 Minutes

Power consumption

Standby: 40mA Max(Backlight off)


Turn on backlight: 43mA Max


measuring:120mA Max(Backlight off)


Instrument: 2430g(with battery)


Current clamp:940g(2PCS)


Test lines:1300g(including simple test line)


Auxiliary grounding rod: 850g(4PCS)

Working temperature and humidity

-10℃~40℃;below 80%rh

Storage temperature and humidity

-20℃~60℃;below 70%rh

Overload protection

Grounding resistance:AC 280V/3 seconds between H-E and S-ES ports

Insulation resistance

20MΩ以上(500V between circuit and housing)

Pressure resistance

AC 3700V/rms(between circuit and housing)

Electromagnetic properties


Suitable for safety regulations

IEC61010-1(CAT Ⅲ 300V、CAT IV 150V、pollution level 2);


IEC61557-1(grounding resistance);

IEC61557-5(soil resistivity);

JJG 366-2004.

JJG 366-2004(ground resistance meter);

JJG 1054-2009(Clamp grounding resistance meter).

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