ETCR2800B Non-Contact Earth Resistance Online Tester Digital Grounding Resistance Measure Resistance Range:0.01Ω～200Ω

Specifications
Function：Return circuit ground resistance, metallic return connection resistance, grounding conditions on-line monitoring
Power Supply：6VDC~9VDC, 50mA Max.
Resistance Range:0.01Ω～200Ω
Resistance Resolution:0.001Ω
Display Range:0.00Ω~500Ω
Accuracy:±2%rdg±3dgt(20℃±5℃, below70%RH)
Working Temperature and Humidity：-20℃-55℃;20%RH-90%RH
Grounding Wire Perforation Size：60mm×30mm, closed mode (60mm×4mm steel flat or external diameter 30mm 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
Overflow Indication：When show value is beyond 500Ω, systems software and LCD show "OLΩ" sign.
Tester Weight：Detector: 960g
Detector Dimensions：175mm×170mm×130mm
Installing Screw Hole Size：8mm
Shifting：Automatic shifting
External magnetic field：<40A/m
External electrical field：<1V/m
GND Interference Current: Prohibited Single measurement time：0.5 second
Humiture Error：Within 5%
Installation: Grounding wire through Detector centre bore
Installation Requirements: Avoid rain and water logging
Power Consumption：50mA Max.
Level Of Protection:IP65
Power Supply Mode:External power supply (Equipped by user)