I. Brief Introduction

ETCR2800C Multifunction Non-Contact 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.

ETCR2800C Multifunction Non-Contact Resistance Online Tester is equipped with LCD display and alarm light, which can observe grounding resistance value at any times and set the alarm critical val. Alarm light will flash when measured value is beyond pre-set critical value. Detector applies to electric transmission line pole ground connection, underground mine device ground connection, meteorological lightning protection grounding 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.
ETCR2800C’s LCD shows measured value directly, also sets up Detector’s alarm critical value, and possess audible and visual alarming function, which is very suitable to Independent installation and use when it needn’t form a network.       

II. Technical Specifications

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 ;0.001Ω ,Display Range ;0.00Ω～500Ω
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)
Overflow Indication ;When show value is beyond 500Ω, systems software and LCD show “OLΩ” sign.

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
Alarm Indication ;Detector Audible and visual alarm instructions
Alarm Setting ;Detector panel setting ,Data Display ;4digits LCD direct indication
LCD Dimensions ;47mm×28.5mm ,Detector Dimensions ;175mm×170mm×130mm
Installing Screw Hole Size ;Φ8mm ,Quality ;Detector: 960g
Working Temperature and Humidity ;-10℃~ 45℃; 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)
III. The Application of Figure