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Date: | Mon, 20 Sep 2010 22:21:23 -0500 |
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这个概念值得商榷。测试距离的平均值?是单位长度的电阻吗?这是一个电阻分布的概念。
没求证过,感觉算术平均值肯定不对。
Best Regards
Leesha Peng 彭丽霞☺
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发件人: TGAsia [[log in to unmask]] 代表 WM-FQA-Zhao ZiDe [[log in to unmask]]
发送时间: 2010年9月21日 11:11
收件人: Listserv TGAsia
主题: Re: [TGAsia] 阻抗测试问题
Dear Sunny:
測試阻抗儀器是取設定測試距離的平均值,取平均值是正確的。
Thanks
Best Regards,
Zhao Zi De
Quality Department
World Mastery Technology Limited
Mail:[log in to unmask]
Mobile:15876935791
----- Original Message -----
From: sungaixian_007<mailto:[log in to unmask]>
To: [log in to unmask]<mailto:[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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