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1.天平的零点调节和不等臂性的检查:在实际使用中分析天平的准确反映在二方面。一方面当在左右两个称盘上放置相同质量的物体时,天平应保持其原来的平衡点;另一方面当同一物体在同一架天平上反复几次称量,其结果应当保持一定的一致性。天平本身的结构应当做到使天平左右两臂和称盘的重量相等以及使天平的两臂的长度相同。调节天平零点(即空载时的平衡点)的目的就是检查两臂及称盘的重量是否相等。作为一种精密仪器,在制造时总是力求使两臂及两称盘的重量一样,但绝对相等也是不可能的,此外由于天平位置的移动,称盘上沾有尘埃等原因,两边的重量总是稍有差别的。因此在天平的横梁上装
1. Balance zero adjustment and unequal arm check: the actual use of analytical balance accurately reflected in two aspects. On the one hand, when placing the same quality objects on the left and right scales, the balance should maintain its original balance point; on the other hand, when the same object is weighed several times on the same balance, the result should be consistent Sex. The structure of the balance itself should be such that the balance between the two arms and the weighing plate is equal and the two arms of the balance are the same length. The purpose of adjusting the zero point of the balance (that is, the equilibrium point at no-load) is to check whether the weights of both arms and the weighing plate are the same. As a precision instrument, always try to make the two arms and the weight of the two scales, but the absolute equal is impossible. In addition, due to the movement of the balance, said the pan stained with dust and other reasons, both sides of the weight Always a little different. Therefore, the balance beam loaded