The correct use method and basic maintenance measures of the multimeter
Multimeters are widely used in experimental practice teaching and instrumentation maintenance. This article introduces the correct use methods and requirements of multimeters, as well as precautions in use.
There are many structural forms of the multimeter, and the layout of the knobs and switches on the panel is different. Therefore, before using the multimeter, one should carefully understand and be familiar with the functions of each component, and at the same time, distinguish the measurement t corresponding to each scale on the panel. the t.
Pay special attention 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 for the multimeter.
In addition, only by using the multimeter correctly can the measurement error be reduced to a minimum. The multimeter should be placed horizontally before use, and check whether the pointer is at zero. If not, adjust the mechanical zero adjustment screw in the middle of the multimeter to make the pointer point to zero. Connect the connecting wire of the red test rod to the red terminal or the socket marked with "+", and connect the connecting wire of the black test rod to the black terminal or the socket marked with "one".
Turn the switch to the desired position according to the object to be measured. For example, when measuring the AC voltage, the transfer switch should be turned to the corresponding interval. On some multi-purpose dials, the type selection knob and the limit change knob are set separately. When in use, the type selection knob should be turned to the corresponding gear to be tested, and then the t limit change knob should be turned to the corresponding gear to obtain an appropriate t limit. Special attention should be paid to the selection of species, otherwise serious consequences may occur.
