数字电压表容许误差的简便计算方法

The Simple Method to Calculate the Allowable Error of Digital Voltmeter

为了得到求数字电压表容许误差的简便计算方法,通过对数字电压表显示特点和容许误差表示方法的描述,及对先求绝对误差,后运用相对误差公式求解的方法的介绍及探讨,得出了一种根据数字电压表显示特点提出的新方法——直接由容许误差表示公式得出容许误差,并总结出了一个有效的公式。通过实例验证了该公式的正确性和方便性。

In order to get a simple method to calculate the allowable error of digital voltmeter,by means of describing the display characteristics of digital voltmeter and the representation of allowable error,and by means of introducing and discussing the method which first obtains absolute error,then calculates the allowable error with relative error formula,a new method is put forward which obtains allowable error directly using allowable error expression,and an effective formula is summarized.The correctness and convenience of the formula is proved through examples.