English
INTRODUCTION
MEWOI3800CA Detector can be proof rain and dust , can be installed outdoors.Detector using non-contact measurement technology, safe and reliable, ground down lead directly through the detector, does not affect the lightning protection grounding effect and the normal operation of facilities. Ensure high-accuracy, high stability and high reliability of long time on-line monitoring outdoors, underground mine and indoors. MEWOI3800CA Non-Contact Grounding Resistance Online Detector applies to electric transmission line pole ground connection, underground mine device ground connection, Meteorological lightning protection ground connection, petrochemical engineering ground connection, communication ground connection, rail facility ground connection, building the warehouse ground connection, electrical equipment ground connection etc.. Detector provides RS232+RS485 interface,can set up network system, real-time detection, remote monitoring. |
TECHNICAL SPECIFICATION
| Power Supply | DC 6V～9V，50mA Max.（External power supply） |
| Grounding cable Perforation Size | 60mm×30mm closed mode (60mm×4mm steel flat or external diameterФ30mm electric cable) |
| LCD Display | NO LCD |
| Range | 0.010Ω～200Ω |
| Resolution | 0.001Ω |
| Accuracy | ±2%rdg±3dgt （20±5）℃，below 70%RH |
| Auto Power-off | Can't Auto Power-off |
| Power consumption | ≤50mA |
| Working environment | -20℃~55℃；20%rh~90%rh |
| Store the environment | -20℃~60℃；below 90%rh |
| Explosion mark | Ex ia ⅡB T3 Ga |
| Level Of Protection | IP56 |
| Communication method | Wired network：RS232、RS485、RS485-MODBUS-RTU communication protocol |
| Wireless network：RS232、RS485、RS485-MODBUS-RTU、GSM communication protocol (Optional) | |
| Data Display | System software display |
| Alarm Indication | System software alarm indication |
| Alarm Setting | System software setting |
| Single measurement time | 0.5 second |
| Shift | Automatic shift |
| External Magnetic Field | ＜40A/m |
| External Electric Field | ＜1V/m |
| GND Interference Current | avoid |
| Protection degree | PCB,Sensor completely seal |
| Power and communication cable | 1M/PCS(5 core wire) |
| Mounting screw hole size | Φ8mm |
| Installation | Grounding cable through Detector centre bore |
| Installation Requirements | Avoid rain and water logging |
| Connection Identifier | Red/brown---power supply input anode; |
| Black--- Power input; | |
| Blue---RS485 Positive signal; | |
| Grey---RS485 Negative signal | |
| White--- analog grounding (power supply input cathode can connects with analog grounding by short circuit connection) | |
| Detector weight | 960g |
| Detector Dimensions | 175mm×170mm×130mm |
SELECTION GUIDE
Digital Earth Resistance Clamp Meter
Click "blue"marked model No. for detailed Specificaiton
| Model | Range | Resolution | clamp size | RS232 | Data Storge | Other |
| 0.01Ω-200Ω | 0.001Ω | 65mm×32mm | optional | 99sets | |
| ø32mm | |||||
MEWOI3000B
| 55mm×32mm | |||||
MEWOI3000
| 0.01Ω-1000Ω | 0.001Ω | 55mm×32mm | 99sets | ||
| 0.01Ω-1200Ω | 0.001Ω | 65mm×32mm | optional | 99sets | |
| ø32mm | |||||
MEWOI3000D
| 0.01Ω-1000Ω 0.00-30.00A | 0.001Ω,0.05mA | 55mm×32mm | 99sets | ||
| 0.01Ω-1200Ω 0.00-20.00A | 0.001Ω,0.05mA | 65mm×32mm | optional | 99sets | |
| ø32mm | |||||
| 0.01Ω-1500Ω 0.00-40.00A | 0.001Ω,0.05mA | 65mm×32m m | √ | 99sets | Rechargable Batteries |
| 0.01Ω-100Ω | 0.01Ω | 60mm*30mm，(Closed) | Appoint with RS485 communication interface, provide standard MODBUS-RTU communication protocol | × | |
| 0.01Ω-100Ω | 0.01Ω | 60mm*30mm （Closed）， | × | LCD display,warning function. | |
| 0.01Ω-200Ω | 0.01Ω | Split Type 56mm×26mm | Wired network: RS232,RS485 standard communication protocol Wireless network: RS232、RS485、GSM communication protocol | × | |
| 0.01Ω-200Ω | 0.01Ω | Split Type 56mm×26mm | × | LCD display,warning function. | |
| 0.01Ω~2000Ω | 0.01Ω | 2/3-wires measurement, Online | |||
| 0.01Ω~2000Ω | 0.01Ω | 2/3-wires measurement, Online,GPRS | |||
| 0.01Ω～2000Ω; 0～600V | 0.01Ω,1V | √ | 400sets | 2/3-wires measurement of earth resistance/voltage | |
| 0.01Ω～2000Ω; 0～600V | 0.01Ω,1V | √ | 400sets | 2/3-wires measurement of earth resistance/voltage | |
| earth resistance:0.01Ω～30.00KΩ; soil resistivity:0.01Ωm～9000KΩm; 0～600V | 0.01Ω,0.01Ωm,1V | √ | 300sets | 2/3/4-wires measurement of earth resistance,soil resistivity,and earth voltage | |
MEWOI4200D
| earth resistance:0.01Ω～30.00KΩ; soil resistivity:0.01Ωm～9000KΩm; 0～600V | 0.01Ω,0.01Ωm,1V | √ | 300sets | 2/3/4-wires measurement of earth resistance,soil resistivity,and earth voltage | |
| earth resistance:0.01Ω～30.00KΩ;AC Leakage current: 0.00mA~600A; soil resistivity:0.01Ωm～9000KΩm;Earth Voltage:0.0~100.0V,dual clamp: 0.01Ω-100Ω | 0.01Ω,0.01Ωm,0.01A,0.1V | ø68mm | √ | 2000sets | 2/3/4-wires,selection & dual clamp method to measure the earth resistance,soil resistivity,earth voltage,AC voltage,AC leakage current,warning function. |
| earth resistance:0.01Ω～30.00KΩ;AC Leakage current: 0.00mA~600A; soil resistivity:0.01Ωm～9000KΩm;Earth Voltage:0.0~100.0V,dual clamp: 0.01Ω-100Ω | 0.01Ω,0.01Ωm,0.01A,0.1V | ø68mm | √ | 2000sets | 2/3/4-wires,selection & dual clamp method to measure the earth resistance,soil resistivity,earth voltage,AC voltage,AC leakage current,warning function. |
| Ground resistance:0.10Ω ～ 200Ω(4 clamp method) Ground resistance ( R ):0.10Ω ～ 20KΩ Soil resistivity ( ρ )0kΩm～9000kΩm AC current (A～)1mA～500.0A Ground voltage (V～)0.0V～200.0V | 0.01Ω,0.01Ωm,0.01mA,0.1V | ø68mm | √ | 100sets | Untie-free tower grounding resistance tester |
