过程分析仪器零点与量程的自动校正

Automatic Calibration of Zero Point and Measurement Range of Process Analytical Instruments

介绍了过程分析仪器零点与量程自动校正的两种方法。一种采用硬件电路,以D/A转换器为核心器件,利用数字电路的记忆功能,构成相对永久性采样保持电路,保持零点补偿电压和量程增益的稳定。另一种是软件方法,在采用微机的分折仪器中,充分利用微机的运算与存贮能力,达到校正的目的,文中给出了校正公式,论证了方法的原理。

Two methods are used usually for automatic calibration of zero point and measurement range of process analytical instruments One is hardware method which uses D/A converter as key element. The memory function of digital circuit is used for construction of relative permanent sample holding circuits to keep zero compensation voltage and span gain stable. The other is software method. In computerized analytical instruments, the calculation and storage abilities of the computer are fully utilized for calibration. The formula of calibration are givn and the principle of the method is discussed.