Instruments design & manufacturer, Tel/Skype/WeChat/Whatsapp: +8615919900475,

Digital Multimeters|Clamp Meters|Digital Moisture meter|Infrared Thermometer|Test & Measurement Tools

Home > News > Enterprise News

Earth Resistance Soil Resistivity Tester

UA4106A Earth Resistance Soil Resistivity Tester/Three wires grounding resistance tester

I.Products Descriptions:

UA4106A Earth Resistance Soil Resistivity Tester is specially designed and manufactured for measuring earth resistance, soil resistivity, earth voltage, AC voltage. Adopting the latest digital and micro-processing technology, precise 4-pole, 3-pole and simple 2-pole method for earth resistance measurement, importing AGC technology, with a unique function of anti-interference capability and the ability to adapt to the environment, consistency of repeat testing, to ensure high precision, high stability and reliability for prolonged measure, which is widely used in electric power, telecommunications, meteorology, oil field, construction, lightning protection, industrial electrical equipment and other earth resistance, soil resistivity, earth voltage, AC voltage measurement.

II.Technical Specifications 

1. Base Conditions and Working Conditions 

Influence Quantity

Base Condition

Working Conditions


Ambient Temp




Ambient Humidity




Working Voltage



Auxiliary Earth Resistance




Interference Voltage



Interference Current


Electrode Distance when  measuring R




Electrode Distance when  measuring ρ






2. General Specification


Measurement of 2/3/4-pole earth resistance, soil resistivity, earth voltage, AC voltage

Power Supply

DC 9V(Zi-Mn dry battery R14S 1.5V 6 PCS, continuous standby for 300 hours )

Measurement Range

Earth Resistance: 0.00Ω-30.00kΩ

Soil Resistivity: 0.00Ωm-9999kΩm

Measuring Mode

Precise 4-pole measurement, 3-pole measurement, simple 2-pole measurement

Measuring Method

Earth Resistance: rated current change-pole method, measurement current 30mA Max

Soil Resistivity: 4-pole measurement (Wenner method)

Earth Voltage: average rectification(between P(S)-ES)

Test Frequency


Short-circuit Test Current

AC 30mA 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-9999kΩm, automatic shift 


Blue screen backlight, suitable for dim places 

Display Mode

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

Measuring Indicator

During measurement, LED flash indicator, LCD count down display, progress bar indicator 

LCD Frame Dimension



L×W×H: 240mm×188mm×85mm

Standard Test Wire

4 wires: each for red 20m, black 20m, yellow 10m, and green 10m

Simple Test Wire

2 wires: each for red 1.5m and black 1.5m

Auxiliary Earthing Rod

4 wires: Φ10mm×150mm

Measuring Rate

Voltage to ground: about 3 times/second

Earth resistance, soil resistivity: about 7 seconds/time

Measuring Times

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

Circuit Voltage

below AC 600V

Data Storage

500 sets, “MEM” icon storage indicator, flash display “FULL” icon to indicate storage is full

Data Read

Data read function: “MR” icon display

Overflow Display

Exceeding measuring range overflow function: “OL” icon display

Alarm Function

When measuring value exceeds alarm setting value, there is “Toot-toot-toot” alarm hint

Battery Voltage

Battery power indicate in real time, the battery voltage is low when the reminder to charge in time

Power Consumption

Standby: about 20mA (Backlight shut off)

Boot and with backlight: about 45mA (25mA without backlight)

Measurement: about 100mA (Backlight shut off)


Tester:1230g (including battery)

Testing Wires:1300g (including simply testing wires)

Auxiliary earthing rod:720g(2 PCS)

Meter bag:1200g

Working Temperature & Humidity

-10℃-40℃, below 80%rh

Storage Temperature & humidity

-20℃-60℃, below 70%rh

Overload Protection

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

Insulation Resistance

Over 20MΩ (between circuit and enclosure it is 500V)

Withstanding Voltage

AC 3700V/rms (Between circuit and enclosure)

Electromagnetic Features


Protection Type

IEC61010-1 (CAT Ⅲ 300V、CAT IV 150V、Pollution 2), IEC61010-031, IEC61557-1 (Earth resistance), IEC61557-5 (Soil resistivity), JJG 366-2004

III. Tester Structure
Digital Multimeters|Clamp Meters|Digital Moisture meter|Infrared Thermometer

1. LCD      2. C(H) interface: Current electrode

3. P(S) interface: Voltage electrode   

4. ES interface: Auxiliary earth electrode

5. E interface:Earth electrode        6. Button area 

7. Rotary switch for selecting function    8. Test button

9. Safety alligator clip         10. Standard test wires   

11. Auxiliary earthing rods     12. Simple test wires

13. Interface of testing wires


Digital Multimeters|Clamp Meters|Digital Moisture meter|Infrared Thermometer

Powered by MetInfo 6.1.0 ©2008-2021