检测设备有仪器误差，100+/-10%是否包括了这个误差？
----- Original Message ----- 
  From: sungaixian_007 
  To: [log in to unmask] 
  Sent: Tuesday, September 21, 2010 10:04 AM
  Subject: [TGAsia] 阻抗测试问题


  各位:
  最近收一个供应商很有意思的话题.特向大家请教.
  关于阻抗测试的结果的判定是选取单个测试条阻抗测试的平均值还是最大值与最小值同标准进行判定?
  例如:
  阻抗要求为 100+/-10%  (MIN 90,MAX110)
  测试仪器显示某个零件测试结果是:  MIN :88   ,MAX:99    平均值:93.
  IPC 标准或者是其他的规范有没有说明是 必须要 MIN 与MAX 都在公差范围内合格才可以判定合格,还是可以直接用平均值来进行判定?

  供应商说他的测试结果是符合要求的,因为平均值在要求范围之内? 

  Sunny

   






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