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万能表的使用(Use of universal Watch).doc

发布:2017-09-03约9.48千字共7页下载文档
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万能表的使用(Use of universal Watch) The multimeter is used to measure AC and DC voltage, DC current, resistance meter etc.. Is an indispensable tool for electricians and radio production. At first glance the multimeter is very complicated, in fact it is from the current table (commonly known as the header), dial, pen, etc. the range switch. When in use, if the range switch to DC current range, current meter M and pick up some shunt to achieve the purpose of expanding the range, making it a table with several different ranges of current size. The measurement results depends on the dial scale DC current readings. Usually the dial second current behavior scale. Similarly, if the range switch to DC voltage range when connected in series with other resistance meter (in principle, the series resistance divider makes it a multi level voltage meter). Reading depends on the dial DC voltage calibration. Most of the multimeter voltage and current with a scale. If the DC voltage measurement circuit connected in a rectifier, AC voltage can be measured. The principle of resistance measurement and measurement of DC voltage is similar, only the test must be added a set of batteries. The selection switch to the resistance range, the dial for the first line of resistance special scale readings can be. Multimeter many models, but its basic use is the same. Taking the MF30 multimeter as an example, how to use it. Use the preparation before the first, before the use of multimeter, must be familiar with the range switch function. Clear must measure what? How to measure? Then the range selection switch in the test file location. Do not mistake stalls. For example: when the error will measure the voltage selection switch in the current or resistance profile, easy to burn out the header. Second, before using the hands look at zero mean. If not zero, use a screwdriver to adjust the header on the mechanical zero adjustment screw, the pointer back to zero (generally dont always have to tune). The r
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