Description
ETCR2800 Non-Contact Ground Resistance Online Monitor is a high-tech product that our company has been engaged in “ground resistance detection technology research” for more than ten years, specializing in online monitoring of the status of ground wire connection, ground connection resistance and metal circuit. Connection resistance range: 0.010ohm~200ohm. Online testing, non-contact measurement, grounding wire pass through detector drilling, will definitely not influence effective grounding for lighting and normal operation, no need for self-inspection, real-time online testing. Provide RS485 wired communication (compatible with MODBUS-RTU communication protocol) or GPRS wireless communication data transmission. The monitor is composed of a sensor and a PCB module, which is suitable for the user’s secondary development integration.
Technical specifications:
-Function: Online monitoring of loop circuit grounding resistance, online monitoring of metal return circuit resistance connection, monitoring of grounding condition. anti-theft monitoring of grounding wires and metal wires-Power
supply: Detector: 6VDC, 9VDC, 50mA Max (external power supply).
-Resistance range: 0.01ohm~200ohm
-Resolution: 0.001ohm
-Accuracy: ± 2% rdg ± 3dgt (20C ± 5C, below 70% RH)
-PCB Size: 122mm x 56mm x 20mm
-Sensor Size: ETCR2800N: 110mm x 80mm x 55mm
-Sensor Punch Size: ETCR2800N: 65mm x 36mm
– Sensor weight: ETCR2800N: 680g
-Overflow Indication: Test Data> 200ohm, Communication Send Command “OLohm”
-PCB Interface:
–J1: Signal Output, Power Input Interface
–J2: Sensor and PCB interface
-J1 Symbol
–P-: Power Input Ground R-: Signal Output with Negative
– GND: signal ground, short connection with power input ground (P-)
-J2 Symbol
–I+I-Current Coil Interface U + U-Voltage Coil Interface
–GND: Common ground
-Connect cable: 1 piece, 1 meter in length (5 core cable)
-Connection ID:
–Red/brown — anode input power supply;
–Black — cathode input power supply;
–Blue — RS485 signal anode;
–Grey — RS485 signal cathode;
–White — ground wire shielding
– (The input cathode of the power supply can be connected with an analog ground connection via a short-circuit connection)
– Communication Method: RS485 Communication Protocol (MODBUS Compatible)
–GPRS communication (optional)
-Working temperature and humidity: -20C~55C; 20% RH ~ 90% RH
-Shift: automatic change
-Interference current of the grounding cable: should be avoided-External
magnetic field: <40A / m-External
electric field: <1 V / m-Individual
measurement time: about 0.5 seconds-Working
current: 50 mA max.
-Installation: Ground wire passes through the center hole of the sensor
-Installation demand: PCB needs to be installed in another protective housing
