化验人员使用天平时，感到头痛的是每天在第一次称量时将指针对了零位，等到称了若干次后想再去对零位，这时指针却回不到零位了，往往要相差几个分度。一般情况下，只要稍加注意即可消除这种现象。具体操作方法如下：每天上班时将天平门推开，过５～１０分钟，让天平里外... Laboratory staff use the balance, the headache is that the first time in the first weighing the pointer to the zero, wait until after a few times we want to go to the zero, then the pointer is not back to zero, and often To a difference of a few degrees. Under normal circumstances, as long as a little attention to eliminate this phenomenon. Specific methods of operation are as follows: every day when the work will open the balance door, over 5 to 10 minutes, so that the balance inside and outside ...