How many steps does a digital multimeter take to measure resistance?
(1) First, measure the resistance value of the resistor. If it is infinite, the resistor is internally disconnected. Then calculate the resistance value through the color ring on the resistance (direct reading is enough if you mark it directly), and compare it with the measured value. If the error is small (should be less than the allowable error marked on the resistor), the resistance is normal. If the error is large, it means that the resistor is damaged and cannot be used.
(2) Black, brown, red, orange, yellow, green, blue, purple, gray, white, gold, silver. 0, 1, .2, .3, 4, .5, 6, .7, 8, .9, . 5%, 10% is the penultimate ring, indicating the number of zeros. The last digit represents an error.
There is a well-memorized formula for this rule: brown, one red, two oranges are three, four yellows, five greens and six are blues, seven purples, eight grays and nines are white, black is zero, gold, five and silver are ten.
For example, red, yellow, brown, gold means 240 euros.
The color ring resistance is divided into four rings and five rings, and four rings are usually used.
The penultimate ring can be gold (representing ×0.1) and silver (representing ×0.01), and the last ring error can be colorless (20%).
The five-ring resistor is a precision resistor, the first three rings are numerical values, and the last ring is an error color ring, usually in three colors of gold, silver and brown. The error of gold is 5%, the error of silver is 10%, and the error of brown is 1%, the error of colorless is 20%, and occasionally there is an error represented by green, and the error of green is 0.5%. Precision resistors are usually used in military, aerospace and other aspects.
The color ring is actually an early standard to help people distinguish between different resistance values. Now it is still widely used, such as household appliances, electronic instruments, and electronic equipment, which can often be seen.
