Correct use and basic maintenance measures of multimeter
Multimeters are widely used in experimental practice teaching and instrument maintenance. This article introduces the correct use methods and requirements of multimeters, as well as precautions during use.
There are many structural forms of multimeters, with different layouts of knobs and switches on the panel. Therefore, before using a multimeter, you should carefully understand and be familiar with the functions of each component. At the same time, you should also distinguish the measurements corresponding to each scale on the panel. of t.
Special attention should be paid to the correct use of the multimeter, because most of the failures of the multimeter are caused by improper operation. Therefore, the correct use of the multimeter is actually the best maintenance of the multimeter.
In addition, only by using the multimeter correctly can the measurement error be reduced to a minimum. Before use, the multimeter should be placed horizontally and check whether the pointer is at zero. If it is not at zero, adjust the mechanical zero adjustment screw in the middle of the multimeter so that the needle points to zero. Connect the red test rod's connecting wire to the red terminal or the jack marked "+", and the black test rod's connecting wire to the black terminal or the jack marked "-".
Turn the switch to the appropriate position according to the object being measured. For example, when measuring t AC voltage, the switch should be rotated to the corresponding range. Some multi-function dials have separate type selection knobs and t-limit conversion knobs. When using, you should first turn the type selection knob to the required gear corresponding to the test object, and then turn the t limit conversion knob to the corresponding gear, the appropriate t limit. Pay special attention to the choice of species, otherwise serious consequences may occur.
