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Quick Details

Weight:	1.2 kG
Dimensions:	175mm170mm130mm

Specifications

INTRODUCTION

MEWOI3800C-Non-Contact Earth Ground Resistance Online Tester is our company devotes ourselves to Grounding resistance test technical research's another new high-tech product for more than ten years. Detector adopts weather fastness material manufacture, temperature resistance, cold-resistant, corrosion prevention, fire prevention. Detector's structure is rigorous and firm, against rain, dustproof, installation and use outdoors. Non-contact measurement, safe and reliable, Ease of installation. Grounding down lead is directly through the detector perforation, Will not affect lightning protection grounding effect and the normal operation of the facilities. Ensure high-accuracy, high stability and high reliability of long time on-line monitoring outdoors, underground mine and indoors.

MEWOI3800C-Non-Contact Grounding Resistance Online Detector applies to electric transmission line pole ground connection, underground mine device ground connection, Meteorological lightning protection ground connection, petrochemical engineering ground connection, communication ground connection, rail facility ground connection, building the warehouse ground connection, electrical equipment ground connection etc.. Detector provides power supply and RS485 signal interface, and standard MODBUS-RTU communication protocol, which user can do secondary development to realize remote monitoring.

TECHNICAL SPECIFICATION

Functions	Return circuit ground resistance, metallic return connection resistance, grounding conditions on-line monitoring
Power Supply	6VDC~9VDC, 50mA Max.
Resistance Range	0.01Ω~200Ω
Resolution	0.01Ω
Accuracy	±2%rdg±3dgt(20℃±5℃, below70%RH)
Grounding Wire Perforation Size	60mm×30mm, closed mode (60mm×4mm steel flat or external diameterФ30mm electric cable)
Connecting Line	A one meter long wire (5cores shielded wire)
Connection Identifier	Red/brown---power supply input anode. Black--- power supply input cathode Blue---RS485 signal anode. Grey---RS485 signal cathode. White--- analog grounding (power supply input cathode can connects with analog grounding by short circuit connection).
Communication Protocol	RS485 standard MODBUS-RTU communication protocol
Detector Dimensions	175mm×170mm×130mm
Installing Screw Hole Size	Φ8mm
Quality	Detector:960g
Working Temperature And Humidity	-10℃~40℃; 20%RH~90%RH
Humiture Error	Within 5%
Shift	Automatic shift
GND Interference Current	Prohibited
External Magnetic Field	＜40A/m
External Electric Field	＜1V/m
Single Measurement Of Time	About 0.5 second
Power Consumption	50mA Max.
Installation	Grounding wire through Detector centre bore
Level Of Protection	IP65
Installation Requirements	Avoid rain and water logging
Power Supply Mode	External power supply (Equipped by user)

SELECTION GUIDE

Digital Earth Resistance Clamp Meter

Click "blue"marked model No. for detailed Specificaiton

Model	Range	Resolution	clamp size	RS232	Data Storge	Audible and visible alarm	Other
MEWOI3000B+	0.01Ω-200Ω	0.01Ω	65mm×32mm	optional	99sets	√
MEWOI3100B+	0.01Ω-200Ω	0.01Ω	?32mm	optional	99sets	√
MEWOI3000+	0.01Ω-1200Ω	0.01Ω	65mm×32mm	optional	99sets	√
MEWOI3100+	0.01Ω-1200Ω	0.01Ω	?32mm	optional	99sets	√
MEWOI3000D+	0.01Ω-1200Ω 0.00-20.00A	0.01Ω,0.05mA	65mm×32mm	optional	99sets	√
MEWOI3100D+	0.01Ω-1200Ω 0.00-20.00A	0.01Ω,0.05mA	?32mm	optional	99sets	√
MEWOI3800C+	0.01Ω-200Ω	0.01Ω	60mm*30mm	Appoint with RS485 communication interface, provide standard MODBUS-RTU communication protocol	×
MEWOI3800D	0.01Ω-200Ω	0.01Ω	60mm*30mm		×		LCD display,warning function.
MEWOI4000	0.01Ω～2000Ω; 0～600V	0.01Ω,1V		√	400sets		2/3-wires measurement of earth resistance/voltage
MEWOI4000C	earth resistance:0.01Ω～30.00KΩ; soil resistivity:0.01Ωm～9000KΩm; 0～600V	0.01Ω,0.01Ωm,1V		√	300sets		2/3/4-wires measurement of earth resistance,soil resistivity,and earth voltage
MEWOI4200	earth resistance:0.01Ω～30.00KΩ;AC Leakage current: 0.00mA~600A; soil resistivity:0.01Ωm～9000KΩm;Earth Voltage:0.0~100.0V,dual clamp: 0.01Ω-100Ω	0.01Ω,0.01Ωm,0.01A,0.1V	?68mm	√	2000sets		2/3/4-wires,selection & dual clamp method to measure the earth resistance,soil resistivity,earth voltage,AC voltage,AC leakage current,warning function.