The correct usage and basic maintenance measures of a multimeter
Multimeters are widely used in experimental internship 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 a multimeter, and the layout of knobs and switches on the panel is different. Therefore, before using a multimeter, it is necessary to carefully understand and familiarize oneself with the functions of each component, and also to distinguish the measurement t corresponding to each scale on the screen.
Special attention should be paid to the correct use of a multimeter, as most malfunctions are caused by improper operation and use. Therefore, using a multimeter correctly is actually good maintenance of the multimeter.
In addition, only by using a multimeter correctly can the measurement error be minimized. The multimeter should be placed horizontally before use and the pointer should be checked to ensure it is at 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 towards zero position. Connect the connection wire of the red test rod to the red terminal or the socket marked with "+", and connect the connection wire of the black test rod to the black terminal or the socket marked with "1".
Rotate the conversion switch to the desired position based on the object being measured. For example, when measuring the AC voltage of t, the conversion switch should be turned to the corresponding range. Some multimeter dials have separate type selection knobs and limit change knobs. When using, the type selection knob should be turned to the corresponding gear required for the test, and then the t-limit change knob should be turned to the corresponding gear, with an appropriate t-limit. Special attention should be paid to the selection of types, otherwise it may cause serious consequences.
