How to use a multimeter to measure resistor resistance
Pointer multimeter measurement:
1. Gear switch: Move to the required gear in the ohm gear (or experiment from large to small).
2. Pointer zero adjustment: Short-circuit the two test leads and adjust the zero adjustment knob so that the pointer points to the zero position.
3. Connect the resistance to be measured and measure: Multiply the resistance scale reading on the dial by the multiple of the gear switch, and the product is the resistance value. The pointer is more accurate when it is near the middle and can be used for gear shifting experiments.
4. Do not touch the resistor with both hands to reduce measurement errors. After the measurement is completed, adjust the multimeter to the highest AC voltage level, or to the disconnection level.
:
Multimeters are divided into traditional multimeters and digital multimeters. The traditional multimeter is a pointer electromagnetic deflection type. It needs to be mechanically adjusted before each use. It is cumbersome to use and the reading of the indication is subjective and inaccurate. It is rarely used now. Use; while digital multimeters can directly display numbers without observing the scale for readings. The results are more accurate and are currently widely used.
Things to note when measuring resistor resistance with a multimeter:
(1) Before using the multimeter, "mechanical zero adjustment" should be performed first, that is, when there is no electricity being measured, the pointer of the multimeter points to the position of zero voltage or zero current.
(2) When using the multimeter, do not touch the metal part of the test lead with your hands. This can ensure accurate measurement on the one hand, and personal safety on the other hand.
(3) When measuring a certain amount of electricity, you cannot change gears while measuring, especially when measuring high voltage or large current, you should pay more attention. Otherwise, the multimeter will be damaged. If you need to change gears, you should disconnect the test leads first, and then measure after changing gears.
(4) When using the multimeter, it must be placed horizontally to avoid errors. At the same time, attention should also be paid to avoiding the influence of external magnetic fields on the multimeter.
