MEWOI4200D-High performance Earth Resistance Soil Resistivity Tester

  • Name:
    MEWOI4200D-Earth tester
  • Model No.:
  • Main Features:
    Grounding resistance test Grounding voltage test Soil resistivity test
  • Price
OEM/ODM Testing Instruments Manufacturer
Contact Us for QuotationEmail:mewoi@mewoi.comWhatsapp: +8618620373879
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MEWOI4200D Earth Resistance Soil Resistivity Tester is specially designed and manufactured for on-site measurement of earth resistance, soil resistivity, earth voltage, AC voltage. Apply digital processing technology, precision 4-wire method, 3-wire method and simple 2-wire method to measure grounding resistance. Adopt FFT (fast Fourier transform) technology, AFC (automatic frequency control) technology, automatic identification of interference and selection of measurement frequency. The tester case is made of waterproof protection box, anti-collision, anti-drop, waterproof (protection grade IP65), strong and durable, and also equipped with a large-capacity rechargeable lithium battery pack, especially suitable for outdoor construction. Widely used in power, telecommunications, meteorology, oil fields, construction, lightning protection and industrial electrical equipment, such as grounding resistance, soil resistivity, grounding voltage, AC voltage.

MEWOI4200D Earth Resistance Soil Resistivity Tester is composed of host machine, monitoring software, testing wires, auxiliary ground pillars, communication wires etc. The large LCD display of host machine, with white backlight and bar graph indicating that can be seen clearly. At the same time it can store 300 sets of data, fulfilling historical inquiry and online real-time monitoring through monitoring software, dynamic display, alarm indicator, and with the functions as historical data access, reading, preservation, report forms, printing and so on.

MEWOI4200D Earth Resistance Soil Resistivity Tester also named: Precision Earth Resistance Tester, 4-pole Earth Resistance Tester,2/3/4-pole Earth Resistance Tester, Soil Resistivity Tester

Reference Conditions And Working Conditions

 Influence Constant

 Base Condition

 Working Conditions


 Ambient Temp




 Ambient Humidity




 Working Voltage

 DC 7.8V±0.1V

 DC 7.8V±0.6V


 Auxiliary Earth Resistance Value












 Electrode Distance of measuring R




 Electrode Distance of measuring ρ




Technical Specifications


 2/3/4-wire method measure earth resistance, soil resistivity; measurement  ofearth voltage, AC voltage

 Power Supply

 DC 7.4V 2600mAh rechargeable lithium battery, full charge about 8.4V


 Earth Resistance: 0.00Ω-30.00kΩ

 Soil Resistivity: 0.00Ωm-9000kΩm

 Earth Voltage:0V~600V

 Measurement Mode

 Precision 4-wire, 3-wire, simple 2-wire measurement of earth resistance

 Measurement Method

 Earth Resistance: rated current change-pole method, test current 20mA Max

 Soil Resistivity: 4-pole method (Wenner method)

 Voltage to ground: average rectification(between P(S)-ES interface)

 Test Frequency


 Short-circuit Test Current 

 AC 20mA max

 Open-circuit Test Current

 AC 40V max

 Test Voltage Wave

 Sine wave

 Electrode Distance Range

 Can be set 1m-100m


 Earth resistance: 0.00Ω-30.00kΩ automatic shift

 Soil Resistivity: 0.00Ωm-9000kΩm automatic shift


 Controllable white screen backlight, suitable for dim places

 Display Mode

 4-digital super-large LCD display, white screen backlight

 Measurement Indication

 During measurement, LED flashes, LCD count down display, progress bar indication

 LCD  Dimension


 LCD display Dimension


 Meter Dimension


 Standard Test Wire

 4 pcs:  red 20m, black20m, yellow10m, and green 10m

 Simple Test Wire

 2 pcs:  red1.6mand black1.6m

 Auxiliary Grounding Rod

 4 pcs: Φ10mm×150mm

 Measurement Time

 Voltage to ground: about 3 times/second

 Earth resistance, soil resistivity: about 5 seconds/time

 Measurement Times

 Over 5000 times (Short-circuit test, measurement interval time should be at least 30 seconds)

 Line Voltage

 below AC 600V

 Communication Interface

 WithUSB interface, software monitoring, storage data can be uploaded to computer, saved or printed.

 Communication Cable

 1pcs USB communication cable, length1.5m

 Data Storage

 300 sets, “MEM” symbol storage indication,display “FULL” symbol indicate storage full

 Data Hold

 Data hold function: “HOLD” symbol display

 Data Access

 Data read function: “READ”symbol display

 Overflow Display

 Exceed measure range overflow function: “OL” symbol display

 Interference Test

 Recognize interference signal automatically, “NOISE” symbol display when interference voltage exceed 5V

 Auxiliary Ground Test

 With auxiliary earth resistance test function, 0.00KΩ-30kΩ(100R+rC<50kΩ, 100R+rP<50kΩ)

 Alarm Function

 Measurement value exceeds alarm setting value, will “Toot-toot-toot” alarm hint


 When power voltage lower than DC 7.2V±0.1V, display low power voltage symbol,and remind to replace battery

 Working Current

 Standby: about 20mA (Backlight close)

 Boot up and with backlight: about 45mA (25mA  backlight close)

 Measurement: about 100mA (Backlight close)


 Tester: 915g

 Test wires:1560g

 Auxiliary ground rods:935g(4pcs)

 WorkingTemperature & Humidity

 -10℃-40℃, below 80%rh

 Storage temperature & humidity

 -20℃-60℃, below 70%rh

 Overload Protection

 Measurement of earth resistance: between each interfaces ofC(H)-E、P(S)-ES,AC 280V/3 seconds

 Protection Level IP65 (close the case)

 Insulation Resistance

 Over 20MΩ (betweencircuit and enclosureit is 500V)

 Withstand Voltage

 AC 3700V/rms (Between circuit and enclosure)

 Electromagnetic Features


 Suitable  Safty Standard

 IEC61010-1 (CATⅢ300V、CAT IV 150V、Pollution 2), IEC61010-031,  IEC61557-1 (Earth resistance), IEC61557-5 (Soil resistivity), JJG 366-2004

Intrinsic error and performance indicators under base conditions

Measurement Function




Earth Resistance













Soil Resistivity



(ρ=2πaR a:1 m~100m;π=3.14)












Earth Voltage

AC 0.0-600V



label:   Earth-tester Ground-resistance-tester Earth-resistance-tester

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