在对自动旋光仪进行检定时,要对空白测试管进行测试,即将带螺帽而不带盖玻片的空测试管放入测试光路中,并将管沿管轴旋转测试,按要求,此时仪器不应出现过大的零位偏差。但实际检定中,进行此项测试时,仪器往往出现的零位偏差大大超过规定的范围。为此应对仪器进行调整。首先分析仪器出现零位偏差的原因。从自动旋光仪测试光路结构原理图(见下图)可 In the automatic polarimeter for testing, the blank test tube to be tested, the soon to be fitted with a test tube with a cap without empty test tube into the test light path, and the tube along the tube axis rotation test, on request, this When the instrument should not appear excessive zero deviation. However, the actual test, the test carried out, the instrument often appear more than the prescribed standard deviation. To this end the instrument should be adjusted. First, analyze the zero deviation of the instrument. From the automatic polarimeter test light path structure diagram (see below) can be