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Product introduction
MEWOI4640 portable micro-ohmmeter is also called DC low resistance meter, DC resistance tester, ohmmeter, the instrument adopts microprocessor technology, four-wire method test, safe, precise and reliable. It is mainly used to measure the wire resistance of cables, the contact resistance of switches, connectors, and relays, the DC low resistance of windings of coils, motors, and transformers, the connection resistance between metal components of metal riveting parts, and the connecting conductors of ground grids and ground poles. The instrument is widely used in industrial and mining enterprises, construction monitoring and supervision companies, construction units, lightning protection companies, electric power departments, ship locomotive factories, etc. MEWOI4640 portable micro-ohmmeter consists of a host and a test line. The host has a large-screen LCD display, which is clear at a glance. Can store 200 sets of data, resistance measurement range: 1uΩ～200Ω, maximum test current: 5A, adopts rechargeable lithium battery, battery capacity 7000mAh, the instrument is easy to operate and easy to carry. |
Backlit display buttons | Winding calibration button | ||
value hold button | test button |
Technical parameter
1. Measurement gear and accuracy
gear | precision | resolution | Maximum test current |
1mΩ | ±0.1%FS±10dgt | 1uΩ | 5A |
100mΩ | 0.1mΩ | 4A | |
1Ω | 1mΩ | 500mA | |
10 Ω | 0.01Ω | 210mA | |
200Ω | 0.1Ω | 21mA |
2. Technical specifications
Function | It is used to measure the wire resistance of cables, the contact resistance of switches, connectors, and relays, the DC resistance of coils, motors, and transformer windings, and the connection resistance of metal riveting, metal components, and connecting conductors between ground grids and ground electrodes. |
power supply | DC 3.7V 7000mAh lithium battery |
Power | Working current≤5A |
Detection method | Precise four-wire method, 2-way A/D simultaneous detection |
Range | 1uΩ～200Ω |
test interface | C1 current positive, C2 current negative, P1 voltage positive, P2 voltage negative |
measure time | 2 seconds/time |
data storage | Yes, the data will not be lost when the power is off or the battery is replaced (200 groups) |
test instructions | The blue TESTING light flashes during the test |
test line | 2 groups: 1 group for red and black, cable length 0.8m |
backlight function | Yes, suitable for dark places |
display mode | Display field: 58.5mm×46mm |
Host size | 159mm×100mm×66mm |
quality | Instrument: about 460g (including battery); total mass: about 640g (including accessories) |
line voltage | Should be avoided (the line cannot be measured with electricity, it may damage the instrument) |
overflow display | Over-range overflow function: " OL " symbol display |
low voltage indication | When the low battery symbol is displayed, it reminds to replace and charge in time. |
Working temperature and humidity | -10℃～40℃; below 80%rh |
storage temperature and humidity | -10℃～60℃; below 70%rh |
Pressure resistance | AC 3700V/rms (between shell and screw) |
Suitable for safety regulations | IEC61010-1, CAT Ⅲ 600V, pollution degree 2, JJG724-1991 "Verification Regulations for DC Digital Ohmmeter", JJG166-1993 "Verification Regulations for DC Resistors", "DL/T967-2005 Loop Resistance Tester and DC Resistance Fast Tester Verification Regulations" |
