Measuring method of resistance
There are three main items of resistance index1 resistance2 relative error3 maximum endurance powerWhen measuring with a multimeter, it is mainly related to the first two items. The identification on the readout resistor, such as the value of 100 ohm, and the error of 10%, is measured by a multimeter. The result is correct between 90~100 ohm, that is, the resistance is basically sound. Note that when measuring a precise resistance, it may not be easy to judge, because the meter itself may be more than the error of measurement error.Resistors that are not digitally labeled are most commonly colored ring resistors, and their coding rules can be searched online using a color ring resistor, which explains very clearly.The more troublesome is the small surface resistance, coding rules, can not directly read the resistance, error and power.Resistance power can generally be judged from experience, roughly from the volume of the shape, to measure the maximum resistance to the power, there are other auxiliary instruments, such as regulated power supply.
It can be said that most resistors have definite index indications, especially the larger volume resistance, the index is more clear and intuitive, and the smaller resistance index index may need simple conversion.
Electrical resistance measurement is the most basic and relatively easy part of electronic components.
