How to Measure Wire Resistance with a Multimeter
1,Firstly select the range of multimeter in the area of resistance file, and select the larger range in priority.
2, the multimeter internal or pen line itself has a certain resistance, in order to accurately measure the resistance value of the measured electrical appliances, the first step is to measure its internal resistance, the red and black pens in contact with each other, the value read out from the multimeter is the internal resistance of the multimeter itself, under normal circumstances, the internal resistance of the following 2 ohms.
3,When measuring the measured resistance, disconnect the power supply of the measured line, otherwise it will affect the measurement accuracy, and damage the multimeter in serious cases, for example, to measure the resistance of the electrical appliances or lines on the car, you can disconnect the battery power.
4, will be connected to the multimeter pen and the measured components, and then adjust the gear in the normal range, in the event that you do not know the resistance of the measured appliances, you can measure from a large range of small range, if a large number of the range of the value shown as 0.00, that is, the gear is larger, you can continue to adjust the small, to measure the resistance.
5, finally, the multimeter shows the normal value of the measured component or line with the multimeter itself the sum of the resistance, this time to use this value minus the internal resistance of the multimeter to get the resistance of the measured component, such as the measured resistance value of 2.6 minus 0.4 in this figure, the correct resistance value is 2.2.
How to use the pointer multimeter to measure resistance
Steps are as follows:
1, connect the pen, open the multimeter, insert the red pen into the VΩ gear, the black pen into the COM terminal, to ensure that the multimeter operates normally;
2, rotate the multimeter gear, measuring resistance requires the use of resistance gear, you can rotate to the estimated value of the gear, such as 200Ω gear;
3, and then connect the two sections of the resistor, because of the positive and negative points, so the pen can be connected casually, but please make sure that the contact is good;
4, and then read out the multimeter display data, if the multimeter does not appear, there may be no data, the resistor is bad, of course, there is a possibility that the range is not enough, replace the range;
5, to increase the range, if there has been no data that can only mean that the resistor is bad, if there is data to read out the data, pay attention to add the gear unit.
