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转速表在工业生产,科研和国防建设等方面广泛地应用着,全国各省、市、地区计量部门以及许多工厂计量室都开展转速计量工作,目前采用的检定装置主要由转速源和指示(或监视)仪表组成。转速源普遍采用JAQUET型和BZ-4型校验台,指示仪表主要是0.5级标准转速表,JSS-2型晶体管数字测速仪或SZ-4型数字转速表以及频闪盘三种。由于这些转速源未加稳速装置,加之机械磨
The tachometer has been widely used in industrial production, scientific research and national defense construction. The measurement departments in various provinces, cities and regions as well as many factory metering rooms all carry out rotational speed measurement. At present, the verification device mainly consists of a speed source and an indicator ) Instrument composition. Speed source commonly used JAQUET type and BZ-4 type check-bed, indicating instruments are mainly 0.5 standard tachometer, JSS-2 transistor digital speedometer or SZ-4 digital tachometer and three kinds of strobe. Because these speed sources did not increase speed device, combined with mechanical grinding