How do you measure resistance with a pointer multimeter?
(1) because of the nonlinear relationship between the electric block scale; it is in the middle of a distribution is fine, so we should make the indicator value as much as possible to the scale of the middle position, the full scale starting 20% - 80% radian range, in order to make the measurement more accurate. According to the difference of resistance error, the error between the reading and the nominal resistance is 5%, 10% or 20% of the soil. If it does not conform to the error range, it indicates that the resistance has changed.(2) test, especially in the resistance measurement of K ohmic resistance above dozens, hands do not touch the pen and conductive part resistance, resistance by detection of the welding down from the circuit, at least one end of a welding, so the other element in the circuit have influence on the test, caused by measurement error, color ring resistance although the resistance to color marking to determine, but when using the best multimeter to measure the actual resistance. For the detection of cement resistance, because it is usually a fixed resistance, so the method of checking cement resistance is the same as that of detecting common fixed resistors.
Then the two probes are respectively connected with the resistor to be measured (note that this resistance do not connect to other circuits), the resistance is showing the number of times *.
First select the gear (x 1, x 10, x 100, X 1K), then the direct contact with the two pen, adjusting the zero resistance (which can rotate the potentiometer) so that the pointer refers to 0 ohm scale. (this step is called "zero resistance")
