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MEWOI4640 1.2A 200Ω DC Resistance Tester,DC miliohmimeter
INTRODUCTION
MEWOI4640 Portable Milliohmmeter, also named DC Low Resistance Tester, DC Resistance Tester, Ohm Meter and so on), It is accurate and reliable adopt with the microprocessor technology and precision 4-wire method to testing. It is mainly used for measuring the wire resistance of cables, the contact resistance of switches, connectors and relays, the low DC resistance of windings coils, motors and transformers line resistance, the connection resistance between metal rivets parts and metal components, and the connection resistance between conductors connected at ground grids poles. It is widely used in construction quality inspection station, supervision company, construction unit, lightning protection company, electric power department, ship engine factory, etc. MEWOI4640 Portable Milliohmmeter consists of the host and test leads. The host with large LCD display, clear and obvious, it can store 200 groups of data at the same time. The resistance measure range is: 1uΩ ~ 200uΩ, the max test current is : 5A, Accurate measurement by Kelvin double bridge method, no need to verify the line resistanceequip with the rechargeable lithium batteries which the battery capacity is 2000mAh, the tester operate easy and carry. |
1. LCD 2. Function key area
3. Test indicator 4. Gears selection rotary knob
5. Test key 6. C1 interface (current is positive)
7. P1 interface (voltage is positive 8. P2 interface (voltage electrode negative)
9. C2 interface (currentelectrodenegative) 10. Charge interface
11. Test leads 12. Power adapter
Measure Gear And Accuracy
| Gear | Accuracy | Resolution | Test Current |
| 1mΩ | ±0.1%FS±10dgt | 1uΩ | ≤5A |
| 100mΩ | 0.1mΩ | ≤4A | |
| 1Ω | 1mΩ | ≤500mA | |
| 10Ω | 0.01Ω | ≤210mA | |
| 200Ω | 0.1Ω | ≤21mA |
Technical Specification
| Function | Mainly used for measuring the wire resistance of cables, the contact resistance of switches, connectors and relays, the low DC resistance of windings coils, motors and transformers line resistance, the connection resistance between metal rivets parts and metal components, and the connection resistance between conductors connected at ground grids poles,etc. |
| Power Supply | DC 3.7V ，7000mAH rechargeable lithium battery |
| Working power | Working current ≤ 5A |
| Detection Method | Precision 4-wire method, 2-channel A/D simultaneous detection |
| Range | 1uΩ～200Ω |
| Test interface | C1 current is positive, C2 current is negative, P1 voltage is positive, P2 voltage is negative |
| Measure Time | 2 seconds / time |
| Data Storage | 200 groups (power down or replace the battery will not lose the data) |
| Test Instruction | Blue testing light flashes during testing |
| Test Wire | 2 sets: Red/Black each 1 set, length 0.8m |
| Backlight Function | Yes, suitable to the dark place |
| Inspection Function | Yes |
| Display Mode | Display area: 58.5mm×46mm |
| Low Voltage Indicator | When the low battery voltage symbol is displayed, remind to replace the battery |
| Host Size | 159mm×100mm×66mm |
| Weight | Meter: about 460g; Total weight: about 640g( include accessories) |
| Line Voltage | Live line measurement should be avoided |
| Overflow Display | Over range overflow function: "OL" symbol display |
| Low voltage indication | When the low battery voltage symbol is displayed, remind to replace the battery |
| Working Temperature | -10℃~40℃ , below 80%rh |
| Store Temperature | -10℃~60℃ , below 70%rh |
| Withstand Voltage | AC 3700V/rms(between housing and screws) |
| Accessories | Meter: 1PCS; Test wires: 1 set; Cloth Bag: 1PCS; Charger :1PCS |
Selection Guide
| Model No. | Range | Detection Mode | Data Storage | Test Current | Power Supply |
| 1mΩ~20.0kΩ | Precision 4-wire method | 200 groups | ≤1.2A | DC 7.4V 2000mAH rechargeable |
| 1uΩ～200Ω | Precision 4-wire method | 200 groups | ≤ 5A | DC 3.7V ，7000mAH rechargeable |
