EM3040B Earth Resistance/ Soil Resistivity Tester-Digital Earth 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

EM3040B Earth Resistance/Soil Resistivity Tester, also known as the Soil Resistivity Tester, is meticulously designed and manufactured for on-site measurements of earth resistance, earth voltage, and soil resistivity. It utilizes digital and microprocessor technology, allowing precise 4-wire, 3-wire, or 2-wire earth 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 earth voltage, an alarm sounds when the voltage exceeds 36V, protecting the operator.
EM3040B Ground Resistance/Soil Resistivity Tester consists of a master 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 earth resistance measurement in power, telecommunications, meteorology, oil fields, construction, lightning protection, and industrial electrical equipment.
ETCRMETER is a high-end brand of ETCR. All products are manufactured by ETCR, which also provides technical support and after-sales service.

Product Features
1. Lightweight, easy to carry, and convenient to operate.
2. Features auxiliary grounding pile detection. The meter displays the auxiliary grounding pile resistance during testing, preventing errors caused by excessive auxiliary grounding resistance.
3. Features auxiliary pile and voltage alarms.

EM3040B (9)~1.jpg EM3040B (10).jpg

Technical Parameters

1.Measurement Range & Accuracy

Measurement Mode	Measure 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=2πaR; a:1.0 m～100m；π=3.14)	0.01Ω
	100.0Ωm～999.9Ωm		0.1Ωm
	1000Ωm～9999Ω		1Ω
	10.00kΩm～99.99kΩ		10Ωm
	100.0kΩm～999.9kΩ		100Ωm
	1000kΩm～9999kΩm		1kΩm
AC / DC Voltage	DC / AC 0.0～600V	±2%rdg±3dgt	0.1V

2.Technical Specification

Specification Name	Parameters Description
Functions	Two-three-four wire earth resistance measurement, soil resistivity measurement, and ground voltage measurement
Power Supply	DC 9V (6PCS* LR6 1.5V alkaline dry batteries)
LCD Displayer	58mm × 46mm
Measurement Range	Earth resistance: 0.00Ω～30.00kΩ; resolution: 0.01Ω; accuracy: ±2%rdg±3dgt
	Soil resistivity: 0.00Ωm～9000kΩm; resolution: 0.01Ωm; accuracy: ±2%rdg±3dgt
	Earth voltage: AC/DC 0V～600V; resolution: 1V; accuracy: ±2%rdg±3dgt
Measurement Method	Earth resistance: Rated current pole-changing method Soil resistivity: Four-pole method Earth voltage: Average value rectification
Test Frequency	128Hz / 111Hz / 105Hz / 94Hz (AFC)
Test Current	> 20mA (sine wave)
Open Circuit Test Voltage	AC 40V max
Measurement Time	Earth voltage: Approx. 3 times/sec
Measurement Time	Earth resistance, soil resistivity: Approx. 15 sec/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 hold.
Data Storage	For 300 groups, the "FULL" symbol indicates when the memory is full.
Data Review	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.
Working Current	Backlight: 56mA Max
	Standby: 20mA Max (backlight off)
	Measurement: 200mA Max (backlight off)
Overload Protection	Earth resistance: between each terminal of C(H)-E、P(S)-ES AC 280V/3 sec
Insulation Resistance	Above 10MΩ (500V between the circuit and the housing)
Withstand Voltage	AC 3700V/rms (between circuit and enclosure)
Electromagnetic Characteristics	IEC61326 (EMC)
Instrument Dimensions	183mm × 89mm × 56mm
Weight	Meter: Approx. 495g (including battery)
Weight	Total weight: Approx. 3.34kgs (including accessories)
Working Temperature & Humidity	-10°C～40°C; below 80%RH
Storage Temperature & Humidity	-20°C～60°C; below70%RH
Safety Standards	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

Product Picture	Model	Resistance Range	Resistivity Range	Voltage Range	Others
	EM3000	0.01Ω～2000Ω	--	AC 0V～600V	Storage function
	EM3000B	0.00Ω～30.00kΩ	0.00Ωm~9000kΩm	AC 0V～600V	Storage function; USB communication
	EM3000-EP	0.01Ω～2000Ω	--	AC 0V～600V	Storage function; Explosion-proof certificate; USB communication
	EM3000B-EP	0.00Ω～30.00kΩ	--	AC 0V～600V	Storage function; Explosion-proof certificate; USB communication
	EM3040	0.10Ω～2000Ω	--	AC 0V～600V	Auxiliary piles, AC / DC voltage alarm; protection function
	EM3040B	0.00Ω～30.00kΩ	0.00Ωm~9000kΩm	AC 0V～600V	Auxiliary piles, AC / DC voltage alarm;
	EM3100	0.01Ω～2000Ω	--	AC 0V～600V	Storage function; USB communication
	EM3100C	0.00Ω～30.00kΩ	0.00Ωm~9000kΩm	AC 0V～600V	Storage function; USB/Bluetooth communication

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