The correct use and basic maintenance measures of multimeter
Multimeters are widely used in experimental practice teaching and instrument maintenance. This article introduces the correct usage methods and requirements of multimeters, as well as precautions during use.
There are many structural forms of multimeters, and the layout of knobs and switches on the panel varies. Therefore, before using a multimeter, it is necessary to carefully understand and familiarize oneself with the functions of each component, and also to separate the measurement t corresponding to each scale on the instrument.
Special attention should be paid to the correct use of multimeters, as the majority of multimeter malfunctions are caused by improper operation and use So using a multimeter correctly is actually good maintenance of the multimeter.
Additionally, only by using a multimeter correctly Only then can the measurement error be reduced to a very low level. Before use, the multimeter should be placed horizontally and the pointer should be checked for zero position. If it is not at zero position, the mechanical zero adjustment screw in the middle of the multimeter should be adjusted to make the pointer point to zero position. Connect the connecting wire of the red test rod to the red terminal or the socket marked with a "+" sign, and connect the connecting wire of the black test rod to the black terminal or the socket marked with a "1" sign.
Rotate the conversion switch to the desired position according to the object being measured. For example, when measuring the AC voltage of t, the conversion switch should be turned to the corresponding interval. Some universal dials have separate type selection knobs and t-limit change knobs. When in use The type selection knob should be turned to the corresponding gear required for the test first, and then the t-limit change knob should be turned to the corresponding gear for the appropriate t-limit. Special attention should be paid to the selection of types, otherwise it may cause serious consequences.
