一、前言机械天平挂砝码工作方式分为加、减砝码两种,分别用在等臂双盘天平和不等臂单盘天平上。由于在用的减砝码工作方式的单盘天平已是凤毛麟角,所以本文仅讨论加砝码工作方式的等臂双盘天平。用全检法检定加砝码组合误差较为费时费事,因而大都依据JJG98-2006《机械天平》检定规程允许采 First, the preamble Mechanical balance weight method is divided into plus and minus weight, respectively, two arm scales were used in the arm and unequal arm single disc balance. As a result of the weight reduction method used in the single disc balance is very rare, so this article only discusses the method of weight with the arm dual disc balance. Test method with the whole test plus weight combination error is more time-consuming and therefore mostly based on JJG98-2006 “mechanical balance” test procedures allowed to adopt mining