| Contact Us for Quotation | Email：mewoi@mewoi.com | Whatsapp: +8618620373879 |
TECHNICAL SPECIFICATION
Click to download: MEWOI3800LD User Manual
Click to download: MEWOI3800LD Color Page
Click to download: Selection Map
| Function | Loop resistance on-line monitoring, metal loop resistance connection online monitoring, grounding condition monitoring. |
| Power Supply | Detector: DC6V~ DC9V, 50ma Max. Wired network communication device: 6VDC，30mA Max. Wireless network communication device: 9VDC，150mA Max.(GSM) |
| CT Structure | Split Type |
| CT Size | 56mm×26mm |
| Resistance Range | 0.01Ω ~ 100Ω |
| Resolution | 0.01Ω |
| Accuracy | ±2% rdg±3dgt(20°C ± 5°C, below 70%RH) |
| Overflow Indication | When show value is beyond 200Ω, 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) |
| Protocol Standard | Wired network: RS232,RS485 standard communication protocol Wireless network: RS232、RS485、GSM communication protocol |
| Network Nodes | Wired network: 1~255 grounding points, scalable Wireless networks: 1~100 grounding points, scalable |
| Communication Distance | Wired network: about 1500 meters, scalable Wireless networks: Unlimited |
| Alarm Indication | MEWOI3800LC: system software alarm indication MEWOI3800LD: sound and light alarm and system software alarm |
| Alarm Setting | MEWOI3800LC: system software settings MEWOI3800LD: tester panel settings, system software settings |
| Data Display | MEWOI3800LC: system software display MEWOI3800LD: 4 bit LCD direct display, system software display |
| LCD Dimensions | 47mm×28.5mm |
| Detector Dimensions | Detector: 119mm×118mm×76mm. Wired network communication device: 140mm×105mm×75mm. Wireless network communication device: 230mm×160mm×105mm |
| Weight | Detector: 1000g. Wired network communication device: 650g. Wireless network communication device: 1300g |
| Working Temperature And Humidity | -20°C~55°C;20% RH~90% RH |
| Temperature and humidity error | Within 5% |
| Shift | Automatic shift |
| GND Interference Current | Prohibited |
| External Magnetic Field | < 40A/m |
| External Electric Field | < 1V/m |
| Single Measure Time | About 0.5 second |
| Power Consumption | Detector: DC6V~ DC9V, 50ma Max. Wired network communication device: 6VDC，30mA Max. Wireless network communication device: 9VDC，150mA Max.(GSM) |
| Installation | Grounding wire cross Detector centre bore |
| Level Of Protection | IP65 |
| Power Supply Mode | External power supply (Equipped by user) |
SELECTION GUIDE
Digital Earth Resistance Clamp Meter
Click "blue"marked model No. for detailed Specificaiton
| Model | Range | Resolution | clamp size | RS232 | Data Storge | Audible and visible alarm | Other |
MEWOI3000B+ | 0.01Ω-200Ω | 0.01Ω | 65mm×32mm | optional | 99sets | √ | |
MEWOI3100B+ | ø32mm | ||||||
| MEWOI3000+ | 0.01Ω-1200Ω | 0.01Ω | 65mm×32mm | optional | 99sets | √ | |
| MEWOI3100+ | ø32mm | ||||||
| MEWOI3000D+ | 0.01Ω-1200Ω 0.00-20.00A | 0.01Ω,0.05mA | 65mm×32mm | optional | 99sets | √ | |
| MEWOI3100D+ | ø32mm | ||||||
MEWOI3800C | 0.01Ω-200Ω | 0.01Ω | 60mm*30mm | Appoint with RS485 communication interface, provide standard MODBUS-RTU communication protocol | × | ||
MEWOI3800D | 0.01Ω-200Ω | 0.01Ω | 60mm*30mm | × | LCD display,warning function. | ||
MEWOI3800LC | 0.01Ω-100Ω | 0.01Ω | Split Type 56mm×26mm | Wired network: RS232,RS485 standard communication protocol Wireless network: RS232、RS485、GSM communication protocol | × | ||
MEWOI3800LD | 0.01Ω-100Ω | 0.01Ω | Split Type 56mm×26mm | × | LCD display,warning function. | ||
MEWOI4000 | 0.01Ω～2000Ω; 0～600V | 0.01Ω,1V | √ | 400sets | 2/3-wires measurement of earth resistance/voltage | ||
MEWOI4000C | 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 | ||
MEWOI4200 | 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. |