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国产740型分光光度计在扫描试样的光谱曲线时,其仪器扫描和记录仪走纸是分步控制的。即先使记录仪走纸到某一位置,再启动扫描速度开关和落记录笔。这种操作方法由于740型仪的扫描速度开关与记录仪的跨距较大,使扫描在记录纸的启始波长处不容易读准,同时操作也比较麻烦。为了减少波长在记录纸上的异步误差和简化操作,我们对仪器稍作改动,增加了一个双向开关和两支插口,就能够使740型仪扫描与记录仪走纸进行同步控制了。
Domestic 740 spectrophotometer in the spectral curve of the sample scanning, the instrument scanning and recorder paper is step-by-step control. That is to make the recorder paper to a certain position, and then start the scanning speed switch and drop pen. This method of operation due to the scanning speed of the 740-type instrument switch and the recorder span greater scanning at the starting wavelength of the recording paper is not easy to read, at the same time the operation is too much trouble. In order to reduce the wavelength error in the recording paper asynchronously and to simplify the operation, we made slight changes to the instrument, adding a two-way switch and two sockets to enable the 740-type scanner to be synchronized with the recorder’s paper feed.