ETCR3740 Equipotential Bonding Resistance Online Tester

Main Functions

Used to on-line measure the equipotential bounding resistance between metal components
Resistance measurement range: 1mΩ~1000Ω
Resistance measurement gear: 1000mΩ, 10Ω, 100Ω, 1000Ω
Test Current: 1A MAX
Alarm function: setting alarm threshold.
Communication mode: RS485, 4G

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Product Introduction
Technical Parameter
Model comparison
Data download

Product Introduction

ETCR3740 Equipotential Connection Resistance On-Line Tester, also known as DC resistance on-line tester, which is used for on-line measurement of the connection resistance between metal components and between the ground connection conductors of the ground grid. The tester is widely used in industrial and mining enterprises, building monitoring and supervision companies, construction units, lightning protection companies, power departments, ship and locomotive factories, etc.
ETCR3740 Equipotential Connection Resistance On-Line Tester adopt with microprocessor technology. 4-wire measurement method, which is safe, precise and reliable. The tester provides 485 communication or 4G communication mode. Users can carry out secondary development, build a network, and realize remote Multi-point online monitoring, etc. according to the MODBUS communication protocol, The tester equip with a large-screen LCD display, which can set test parameters and view the present DC resistance value on site. The tester has the function of sound and light alarm, and the alarm threshold can be set. The tester is easy to install, safe and durable.
1.Adopt with precision 4-wire measurement method, more accurate testing.
2.Resistance measurement gear: 1000mΩ, 10Ω, 100Ω, 1000Ω
3.With RS485 communication or 4G communication mode, Users can carry out secondary development, build a network, and realize remote Multi-point online monitoring, etc. according to the MODBUS communication protocol.
4. The tester equip with LCD display, which can view the present DC resistance value on site.
5.Able to set test parameters
6.Alarm function: setting alarm threshold.

Technical Parameter

1.Measurement Range & Accuracy

Gear	Accuracy	Solution
1000mΩ	±2%±3dgt	1mΩ
10Ω		0.01Ω
100Ω		0.1Ω
1000Ω		1Ω

2.Technical Specifications

Power Supply	DC 12V / 2A (external provide)
Display Mode	128mm×75mm; display area: 124mm×67mm
Test Current	1.2A MAX
Measurement Method	Precision four-wire method, 2 A/D simultaneous detection
Measurement Range	1mΩ~1000Ω
Test Interface	C1 current positive, C2 current negative, P1 voltage positive, P2 voltage negative
Test Time	30 seconds/time
Data Storage	Yes, power down or replace the battery will not lose the data(200 groups)
Alarm Setting	Alarm threshold setting range: 0Ω~999Ω, 00Ω does not start the alarm function
Test Indication	TESTING light flickers during the test
Communication Mode	RS485communication, 4G communication(optional)
Host Size	190mm×117mm×54mm
Weight	Tester: about 450g
Line Voltage	Should be avoided (the line cannot be measured with electricity, which may damage the instrument)
Overflow Display	Overrange overflow function: "OL" symbol display
Withstand Voltage	AC 3700V/rms(Between the shell and the screw)
Suitable Safety Standard	IEC61010-1, CAT Ⅲ 600V, pollution level 2, JJG724-1991 "DC Digital Ohmmeter Verification Procedures", JJG166-1993 "DC Resistor Verification Procedures", "DL/T967-2005 Loop Resistance tester and DC Resistance Rapid tester Verification Procedures"
Working Temperature & Humidity	-10℃~40℃; below 80%RH
Storage Temperature & Humidity	-10℃~60℃; below 70%RH