笔者多年从事旋光仪检定与维修工作,总结出维修旋光仪必须遵循以下原则:(1)先易后难,先外后内;(2)先测量后动手;(3)先光路后电路。通常,接收送修仪器首先应打开机盖,目测仪器外观及机械部分是否正常、完好,许多故障都是可以通过外部检查发现。譬如,打开电源开关K1,钠灯不亮,原因可能是开关K1坏、钠灯坏、3A保险丝熔断或限流器坏。这些故障通过万用表就能快速判别,如限 I have been engaged in the polarimeter calibration and maintenance work for many years, and concluded that the maintenance of polarimeter must follow the following principles: (1) First, difficult after the first outside the outside; (2) After measuring the hands; (3) First light circuit. Usually, the receiving equipment should first open the cover, visual appearance and mechanical parts are normal, intact, many faults can be found through an external inspection. For example, turning on the power switch K1, the sodium lamp does not light, the reason may be switch K1 bad, sodium lamp is bad, 3A fuse blown or current limiter is bad. These faults can be quickly distinguished by a multimeter, such as the limit