在保证光路元件洁净、灯泡位置正确的前提下,721型分光光度计波长超差的主要原因是:波长刻度盘起始位置选择不当或准直镜反射角调整不当。下面介绍笔者总结的一种调整方法。 1.往360nm以下方向旋转刻度盘,能听到暗盒内小滚珠轴承落入凹槽发出的轻微响声,此时刻度盘应在-21°位置。否则旋松刻度盘三个定位螺丝,将刻度盘拨至该位置。 2.将刻度盘旋至580nm处,在试样室 Under the premise of ensuring that the optical components are clean and the lamp position is correct, the main reason for the wavelength aberration of the 721 spectrophotometer is that the initial position of the wavelength scale is not properly selected or the reflection angle of the collimator lens is improperly adjusted. Here’s the author summarizes a method of adjustment. 1. Turn the dial below 360nm to hear a slight noise from the small ball bearing in the cassette falling into the groove. The dial should be in the -21 ° position. Or loosen the three positioning screws on the dial and dial the dial to that position. 2. Rotate the dial to 580nm at the sample compartment