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751系列分光光度计是较常见的紫外、可见、远红外区的理化分析仪器。零位计不稳定则是此类型分光光度计的常见故障，对于零位计指针可调至中央位置，但左右摆动、漂移——零位不稳定的现象，可从电源、放大器及H-W稳流稳压电源三个方面进行分析与调节。对于电源部分，市电的波
751 Series Spectrophotometer is the more common UV, visible, far infrared physical and chemical analysis equipment. Zero gauge instability is a common failure of this type of spectrophotometer for the zero gauge pointer can be adjusted to the central location, but the left and right swing, drift - zero instability phenomenon, from the power supply, amplifier and the steady flow of HW Regulated power supply three aspects of analysis and regulation. For the power section, the electricity wave