ETCR EM3040B Earth Resistance/ Soil Resistivity Tester-Digital Earth Resistance Tester-ETCR|Earth Resistance Online Tester|Insulation Resistance Tester|Clamp Leakage Current Meter-Guangdong ETCR Electronic Technology CO.,Ltd-Guangdong ETCR Electronic Technology CO.,Ltd

Product Introduction

The ETCR EM3040B Ground Resistance/Soil Resistivity Tester, also known as the Soil Resistivity Tester, is meticulously designed and manufactured for on-site measurements of ground resistance, ground voltage, and soil resistivity. It utilizes digital and microprocessor technology,

allowing precise 4-wire, 3-wire, or 2-wire ground resistance measurements. The instrument features an auxiliary grounding stake alarm function, displaying the resistance of the auxiliary grounding stake during testing. An indicator light indicates whether the auxiliary

grounding stake is properly grounded, preventing errors caused by excessive grounding resistance. When measuring ground voltage, an alarm sounds when the voltage exceeds 36V, protecting the operator.

The ETCR EM3040B Ground Resistance/Soil Resistivity Tester consists of a main unit and test leads. It features an automatic power-off function, automatic shifting across the entire measuring range, strong anti-interference capabilities, and simplified operation. It is widely used

for measuring ground resistance, soil resistivity, and ground voltage in applications such as power, telecommunications, meteorology, oilfields, construction, lightning protection, and industrial electrical equipment.

Product Features

1. Lightweight design for easy portability and convenient operation. 2. It features an auxiliary grounding pile detection function. The meter displays the resistance of the auxiliary grounding pile during testing, preventing errors caused by excessive auxiliary grounding

resistance.

3. It also features an auxiliary pile alarm and a voltage alarm.

EM3040B (9)~1.jpg

EM3040B (10)~1.jpg

Technical Parameters

1. Range and accuracy

Measuring function	Measuring range	Accuracy	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	1Ω
	3.00kΩ～30.00kΩ	±4%rdg±3dg	10Ω
Soil resistivity (ρ)	0.00Ωm～99.99Ω	(ρ=2πaRa:1 m～100m；π=3.14)	0.01Ω
	100.0Ωm～999.9Ωm		0.1Ωm
	1000Ωm～9999Ω		1Ω
	10.00kΩm～99.99kΩ	(ρ=2πaRa:1 m～100m；π=3.14)	10Ωm
	100.0kΩm～999.9kΩ	(ρ=2πaRa:1 m～100m；π=3.14)	100Ωm

	1000kΩm～9000kΩm		1kΩm
Earth voltage	DC/AC 0.0～600V	±2%rdg±3dgt	0.1V

2. Technical specifications

Functions	Two-, three-, and four-wire ground resistance, soil resistivity, and ground voltage measurements
Power	DC 9V (6 LR6 1.5V alkaline dry cell batteries)
Range	Ground resistance: 0.00Ω to 30.00kΩ
	Soil resistivity: 0.00Ωm to 9000kΩm
	Ground voltage: DC/AC 0V to 600V
Measurement Method	Ground resistance: Precision 4-wire, 3-wire, and simple 2-wire methods Soil resistivity: Four-pole method (Wenner method) Ground voltage: Average value rectification (between P(S) and ES interfaces
Test Frequency	128Hz/111Hz/105Hz/94Hz (AFC)
Test Current	>20mA (sine wave)
Open Circuit Test Voltage	AC 40V max
Backlight	Controllable white screen backlight, suitable for use in dimly lit locations

LCD Size	LCD display area: 58mm × 46mm
Instrument Dimensions	183mm × 89mm × 56mm
Measurement Time	Ground voltage: Approximately 3 times/second
Measurement Time	Ground resistance, soil resistivity: Approximately 15 seconds/time
Line Voltage	Measurements below AC 600V
Auxiliary Alarm	The RP(S)R C(H) OK indicator prevents errors caused by excessive auxiliary ground electrode ground resistance.
Voltage Alarm	When the voltage exceeds 36V, the Live circuit indicator flashes and a buzzer sounds.
Data Hold	The "HOLD" symbol indicates when data is being held.
Data Storage	For 300 groups, the "FULL" symbol indicates when the memory is full.
Data View	The "READ" symbol indicates when reviewing data.

Overflow Indicator	The "OL" symbol indicates when the range is exceeded.
Interference Test	Automatically identifies interference signals. The "NOISE" symbol indicates when the interference voltage exceeds 5V.
Battery Voltage	When the battery voltage drops to about 7.2V, the low battery voltage symbol "" will be displayed, reminding you to replace the battery.
Operating Current	Backlight: 56mA Max
	Standby: 20mA Max (backlight off)
	Measurement: 200mA Max (backlight off)
Quality	Meter: Approximately 500g (including battery)
Quality	Total weight: Approximately 3.34kg (including accessories)
Operating Temperature and Humidity	-10°C to 40°C; 80% RH or less
Storage Temperature and Humidity	-20°C to 60°C; 70% RH or less

Overload Protection	Measurement of ground resistance: AC 280V/3 seconds between C(H)-E and P(S)-ES terminals
Insulation Resistance	10MΩ or more (500V between circuit and enclosure)
Withstand Voltage	AC 3700V/rms (between circuit and enclosure)
Electromagnetic Characteristics	IEC61326 (EMC)
Safety Compliance	IEC61010-1 (CAT III 600V, CAT IV 150V, pollution degree 2); IEC61010-031; IEC61557-1 (ground resistance); IEC61557-5 (soil resistivity); JJG 366-2004.

Model Comparison

Commonly Used Test Instruments in the Lightning Protection Industry

Product Name	Model	Main Parameters
Clamp Earth Resistance Tester	EM2000+	Range: 0~1000Ω, Resolution: 0.01Ω
Digital Earth Resistance Tester	EM3040	Test Current: >20mA (sine wave), Resolution: 0.01Ω
Large Grounding Network Earth Resistance Tester	EM3300B	Test Current: >3A, Resolution: 0.001~99.999Ω, Frequency Optional
Soil Resistivity Tester	EM3040B	Four-Wire Measurement, Test Current: >20mA (sine wave) Resolution: 0.01Ω
Equipotential Connection Reistance Tester	EM3700	Test Current: >1A, Four-Wire Test, Resolution: 0.001Ω, With Large Capacity Lithium Battery
Clamp Loop Resistance Tester	EM2150	Resistance Measurement Resolution: 0.001Ω, Current Measurement Resolution: 1uA
Lightning Protection Tester	EM3800	Test Device: MOV, With Large Capacity Lithium Battery
Insulation Resistance Meter	EM3460A	0～1000MΩ
Surface Impedance Tester	EM3420	Measuring Range: 10³～10¹⁰Ω

Digital Multimeter	EM5930	Voltage, Current, Resistance Measurement, Resolution: 3.5 Digits
Lightning Protection Standard Resistor	EM3900	10ˉ³～10⁵Ω，Power 1/2w, Wirewound

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