一、引言当测得天平空秤的平衡位置为L_o、天平全量(即重秤)的平衡位置为L_P时,Y=|L_p-L_o|就是以分度计的天平不等臂偏差。为消除偏差,就要伸长天平的短臂或缩短天平的长臂,这时可以发现L_o、L_p总是沿着同一方向移动,并且L_p总是追赶L_o的,当L_p与L_o的位置相重合时,|L_p-L_o|=0,不等臂偏差就被消除了。但是,臂长改变多少,L_p与 I. INTRODUCTION When the equilibrium position of the balance is L_o, the equilibrium position of the balance (ie, scale) is L_P, Y = | L_p-L_o | To eliminate the deviation, it is necessary to extend the balance of the short arm or shortening the long arm, then you can find L_o, L_p always move in the same direction, and L_p always catch up L_o, when L_p and L_o position coincide , | L_p-L_o | = 0, unequal arm deviation is eliminated. However, how much arm length changes, L_p and