笔者在十几年的天平检定工作中发现，跳针故障是机械天平常见的故障之一。尤其是经过大修后的天平，几乎全部存在跳针现象。当开启天平的时候，在读数光屏上可以看到刻线和读数逐渐由清晰到不清晰，或者由模糊到清晰。从天平旁门方向观察指针下端微分标牌处，微开天平时可以看 In more than a decade of the balance test I found that jumping pin failure is one of the common mechanical balance failure. Especially after the overhaul of the balance, almost all exist jumper phenomenon. When you turn on the balance, you can see the graduations and readings gradually change from clear to unclear or from blurred to clear on the reading screen. Opposite side of the balance from the balance pointer to observe the differential signage at the micro-open balance can be seen