Functions: Return circuit ground resistance, metallic return connection resistance, grounding conditions on-line monitoringPower Supply: 6VDC~9VDC, 50mA Max.Resistance Range: 0.01Ω~200ΩResolution: 0.001ΩAccuracy: ±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 cathodeBlue---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 protocolDetector Dimensions: 175mm×170mm×130mmInstalling Screw Hole Size: Φ8mmQualityDetector:960gWorking Temperature And Humidity: -10℃~40℃; 20%RH~90%RHHumiture Error: Within 5%Shift: Automatic shiftGND Interference Current: ProhibitedExternal Magnetic Field: ＜40A/mExternal Electric Field: ＜1V/mSingle Measurement Of Time: About 0.5 secondPower Consumption: 50mA Max.Installation: Grounding wire through Detector centre boreLevel Of Protection: IP65Installation Requirements: Avoid rain and water loggingPower Supply Mode: External power supply (Equipped by user)