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  • Place of Origin: Guangdong, China (Mainland)
  • Brand Name: ETCR
  • Model Number: ETCR2800C
  • Display Type: Digital Only
  • Measuring Range: 0.01-200ohm


Multifunction Non-Contact Resistance Online Tester
1.Resistance range:0.01-200ohm
3.Appoint with RS485


ETCR2800C Multifunction Non-Contact Resistance Online Tester

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


Return circuit ground resistance, metallic return connection resistance, grounding conditions on-line monitoring

Power Supply

6VDC~9VDC, 50mA Max.

Resistance Range




Display Range



±2%rdg±3dgt(20°C±5°C, below70%RH)

Grounding Wire Perforation Size

60mm×30mm, closed mode (60mm×4mm steel flat or external diameter 30mm 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


Detector Dimensions


Installing Screw Hole Size



Detector: 960g

Working Temperature and Humidity

-10°C~ 45°C; 20%RH ~ 90%RH

Humiture Error

Within 5%


Automatic shift

GND Interference Current


External Magnetic Field


External Electric Field


Single Measurement Of Time

About 0.5 second

Power Consumption

50mA Max.


Grounding wire through Detector centre bore

Level Of Protection


Installation Requirements

Avoid rain and water logging

Power Supply Mode

External power supply (Equipped by user)

III. The Application of Figure


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