推荐回答(4个)
一般来说手表的走时精度,防水性能主要的检测项目,但是如果要检测这两项,却需要一定时间和仪器。例如机械表正常上满发条,走时延续36小时,误差应该在±25每天,而石英表的走时误差应该在每个月相差±15秒或每天相差±0.5秒。防水性能则需要按照手表明示的标准进行(最低3个大气压)。因此一般我们选择新手表的时候,主要还是看手表的一些外观因素。
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①外观因素:表壳检查
表壳一般都为金属材质,而且表壳与柄头之间的间隙0.1~0.2毫米。不管是组装,打包过程,都会难免有小接触。因此对于一些轻微的擦伤、漏段、碰伤、划伤等,是可以接受的。但有5个不允许,表壳正面不允许有明显的划伤、砂眼、碰伤、刀伤和麻坑或缺料。表壳侧面不允许有大于0.5毫米划伤、砂眼,而且每一面不能超过2处。表壳背面不允许有大于0.5毫米的砂眼、碰伤也是不得多于2个。表壳安装表带的孔不允许有鼓包、豁眼等瑕疵存在。表壳后盖不允许有严重的划伤、砂眼。
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②外观因素:表针检查
一般手表的表针在调节时间的时候,时、分、秒针与表盘面互相平行,拨针顺畅,松紧适合。拨针时表针不得有一边高,一边低的现象。拨针使时针旋转一圈,秒针不得蹭表玻璃,不得有蹭盘、蹭刻度和碰针的现象。时针与3、6、9、12时刻度重合时,分针偏离12时“刻度”应小于正负3分格。同时表针外观上不允许有明显的划伤、漏镀、变色、生锈及夜明脱落。
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③外观因素:表盘检查
表盘就像手表的脸蛋,一般需要注意的几点就是划伤宽度不能超过0.3毫米、盘坑直径不允许大于0.25毫米。不允许有明显的鼓包和盘上粘有杂物的鼓包,盘鼓不允许直径小于0.09毫米同时存在3个。不允许有表盘变质、起皮、严重波纹和擦伤。异色斑点可以有1个直径0.3毫米的,3个小于0.3毫米的。分刻度不允许有明显的断线和缺线、重线。夜明点不允许有脱落短少左右不得超过1分格。商标、盘字和罩光漆不得有明显的划伤、漏镀、变色和气泡。
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④外观因素:表玻璃检查
一般在室内自然光线下观察,看出轻微的划伤和波纹,不影响整体效果,可以接受,但是如果出现斑点,而且直径不大于0.3毫米允许有四个,中心平面允许有两个,0.3毫米以下的不限数,斑点相距大于5毫米。但是如果划伤:玻璃边缘允许有轻段的划伤、擦伤;里边不允许有明显的划伤,擦伤、崩边及龟裂。最后反光圈不允许有明显的划伤、变色及电镀层脱落。
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专柜买全新的手表要注意看是否有保修,一般会有专门的保修卡和使用说明书。还要看手表的存放是否完整无损。包装,表链各方面都要检查清楚。
1、检查手表的外壳,避免明显的划伤 2、走时一定要精准 3、看表盘是否凹凸不平 4、检查玻璃是否有划伤、擦边 5、表带颜色是否均匀
要注意表的新旧程度,也要注意表是否有问题,还要和专柜柜员学问清楚维修时间是有多久,其他就没有什么可注意的了。
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