首先气泡的出现不是什么太大的问题，下面是Recta指北针用户手册上摘录的一段话：
Small bubbles in the liquid are of no importance. They may appear and disappear with changes of temperature and air pressure.
气泡出现的原因如下（密封液体和密封仓的热涨冷缩的速度不同，产生了真空气泡）：
It is not uncommon for a small bubble to appear in the liquid-filled housing when you are using your compass in high elevations or in temperatures below freezing. The bubble forms because the fluid within the housing contracts or expands at a faster rate than the housing, resulting in a "vacuum" bubble. This bubble will not affect the performance of your compass as the liquid's sole purpose is to dampen or slow down the movement of the magnetic needle. Typically, any bubble will disappear when the compass is returned to room temperature and / or lower elevation. If the bubble remains, as appears to be the case with your compass, it is possible to correct the situation by placing the compass in a warm (not hot) spot, such as a sunny window sill. Do keep an eye on the bubble if it refuses to depart. Should the bubble grow in size, you might have a small, almost imperceptible leak in the liquid-filled compass housing and that means you will need a new compass. |
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发表于 2006-11-2 15:00