ETCR3100C Earth Resistance Soil Resistivity Tester - ETCR

ETCR3100C Earth Resistance Soil Resistivity Tester

Product Characteristics

1. 2/3/4-pole method measure earth resistance,Range:0.00Ω~30.00kΩ;

2. Soil resistivity measurement, Range:0.00Ωm~9000kΩm;

3. Earth voltage measurement,Range:AC 0~600V

4. Data storage: 300 sets

5. Alarm function: audible and visual alarm

ETCR3100C 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, to minimize the impact of interference, provide more accurate earth resistance value. With unique anti-interference ability and environmental adaptability, high repeated test consistency, ensuring high precision, high stability and high reliability for long-term measurement.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.

ETCR3100C Earth ResistanceSoilResistivity 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.

ETCR3100C Earth ResistanceSoilResistivity 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

Function 2/3/4-pole measurement for earth resistance, soil resistivity, earth voltage, AC voltage
Power Supply DC 7.4V 2600mAh rechargeable lithium battery, full of about 8.4V
Measurement Range Earth Resistance: 0.00Ω-30.00kΩ
Soil Resistivity: 0.00Ωm-9000kΩm
Earth Voltage: 0V~600V
Measurement Mode Precise 4-pole measurement, 3-pole measurement, simple 2-pole measurement of earth resistance
Measurement Method Earth Resistance: rated current change-pole method, test current 20mA Max
Soil Resistivity: 4-pole method (Wenner method)
Earth Voltage: average rectification(between P(S)-ES)
Test Frequency 128Hz/111Hz/105Hz/94Hz(AFC)
Short-circuit Test Current AC 20mA max
Open-circuit Test Current AC 40V max
Test Voltage Wave Sine wave
Electrode Distance Range 1m-100m
Shift Earth resistance: 0.00Ω-30.00kΩ automatic shift
Soil Resistivity: 0.00Ωm-9000kΩm automatic shift
Backlight Controllable white screen backlight, suitable for dim places
Display Mode 4-digital super-large LCD display, white screen backlight
Measurement Indicator During measurement, LED flash indicator, LCD count down display, progress bar indicator 
LCD Frame Dimension 128mm×75mm
LCD Window Dimension 124mm×67mm
Meter Dimension 280mm(L)×260mm(W)×160mm(H)
Standard Test Wire 4 wires: each for red 20m, black 20m, yellow 10m, and green 10m
Simple Test Wire 2 wires: each for red 1.6m and black 1.6m
Auxiliary Ground Rod 4 wires: Φ10mm×150mm
Measurement Rate Voltage to earth: about 3 times/second
Earth resistance, soil resistivity: about 15 seconds/time
Measuring Times Over 5000 times (Short-circuit test, interval time should be at least 30 seconds)
Circuit Voltage below AC 600V
Communication Interface USB interface, software monitoring, storage data can be uploaded to computer, saved or printed.
Communication Wire One piece USB communication wire, length 1.5m
Data Storage 300 sets, “MEM” symbol storage indicator, flash display “FULL” symbol indicate storage full
Data Hold Data hold function: “HOLD” symbol display
Data Read Data read function: “READ” symbol display
Overflow Display Over 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
Auto-shut off Automatically shut down after 10 minutes of power on
Battery Voltage While battery voltage decreases to around 7.2V±0.1V, will display battery voltage low symbol“   ”, and reminding to charge
Working Power Standby: about 20mA (Backlight shut off)
Boot up and with backlight: about 45mA (25mA without backlight)
Measurement: about 100mA (Backlight shut off)
Weight Tester: 2290g
Tester bag:915g
Test wires: 1560g
Auxiliary ground rods: 935g (4pcs)
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 
Protection Level IP65(close the case)
Insulation Resistance Over 20MΩ (between circuit and enclosure it is 500V)
Withstand Voltage AC 3700V/rms (Between circuit and enclosure)
Electromagnetic Features IEC61326(EMC)
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

Intrinsic error and performance indicators under base conditions

Measurement Function Measurement Range Accuraccy Resolution
Earth 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
3.00kΩ~30.00kΩ ±4%rdg±3dgt 10Ω
Soil Resistivity(ρ) 0.00Ωm~99.99Ωm  (ρ=2πaR  a:1 m~100m;π=3.14) 0.01Ωm
100.0Ωm~999.9Ωm 0.1Ωm
1000Ωm~9999Ωm 1Ωm
Soil Resistivity (ρ) 10.00kΩm~99.99kΩm (ρ=2πaR  a:1 m~100m;π=3.14) 10Ωm
100.0kΩm~999.9kΩm 100Ωm
1000kΩm~9000kΩm 1kΩm
Earth Voltage AC 0.0~600V ±2%rdg±3dgt       0.1V

Earth Resistance (Ω) Selection Method Measure Resistance (Ω)
Double Clamp 
Method Measure Resistance
Soil Resistivity
Earth Voltage
AC Current
Data Storage
0.01~2000 None None None 0~600 None 400 Normal type
0.01~2000 None None None 0~600 None 400 Waterproof protective shell
0.01~30000 None None 0.00~9000k 0~600 None 300 Normal type
0.01~30000 None None 0.00~9000k 0~600 None 300 Waterproof protective shell
0.01~30000 0.01~3000 0.01~100 0.00~9000k 0.0~100.0 0.00mA~600A 2000 Normal type
0.01~30000 0.01~3000 0.01~100 0.00~9000k 0.0~100.0 0.00mA~600A 2000 Waterproof protective shell

 Meter  1 PCS
 Meter Bag  1 PCS
 Auxiliary Grounding Rod  2 PCS
 Monitoring sortware CD  1 COPY
 USB Communication Cable  1 PCS
 Test Wires  4 PCS 
 Simple Test Wires  2 PCS 
 Special Charger  1 PCS
 Manul/Warranty Card/Certificate  1 SET

ETCR3100C Catalog