1故障现象使用氘灯源，波长为334um，测量档在“0～100％”，调节“A→T”旋钮，在不放样品和空白条件下，数字显示达不到100％，最高只达70％。2故障分析及排除从测定原理可由光路与电路两方面找原因。（l）先排除光路故障的可能性。先进行零级光谱的校正，步田如下：接通电源 1 fault phenomenon using a xenon lamp source, the wavelength is 334um, measurement file in the “0 ~ 100%”, adjust the “A → T” knob, without placing the sample and blank conditions, the digital display less than 100%, the highest only up to 70%. 2 failure analysis and exclusion from the principle of determination by the optical circuit and the circuit to find the reasons. (l) Remove the possibility of a light path failure first. The first zero-order spectrum correction, step field is as follows: power on