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UL工厂检查都查什么？
我今天刚接待了 UL 的工厂检查, 感觉是比以前严格了很多. 我私下问了auditor, 他们最近有加严的要求, 但都没有超出 UL FUS Procedure 的要求, 主要体现: 执行细则中 appendices 的要求严格了, 具体了. 针对 Direct Plug-In and Cord-Connected Class 2 Power Units (EPBU, EPBU2) 产品, 分享如下:
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7 T) @9 H- n( _9 m9 O# v8 j1. 摘自 appendix A6 G) A9 U0 J7 q3 ]
UL REPRESENTATIVE'S DUTIES
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The UL Representative's duties include, but are not limited to:
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8 ] j' L) V7 j$ J$ mExamining the construction of the product intended to bear the UL Mark or Marking to determine compliance with the description of the product and any other requirements expressed in this Procedure. (以前的检查重点 - 产品结构)
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# b8 U: x& \6 x5 GSelecting samples, where so specified by Appendix B (说明抽样要求), for shipment to UL for follow up tests. I) S, I6 ~' d3 T
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Inspecting the test records and facilities of the manufacturer, where so specified by Appendix D, to ensure that:
- S/ T3 q. D# H0 j5 C! ^A. - The proper number of samples are undergoing the required tests;( m$ ^; V) L2 ^, o
B. - The required tests are being performed correctly;$ k. {& @8 [( C- g
C. - The proper information is being recorded and is up to date; and: X% A( S( F6 O3 U: i
D. - The instruments being used for the tests have been calibrated at the prescribed interval and function properly. (这里说明了仪器计量要求 - 在以前的检查中没有重视)4 [; p! u+ h; E# v! Q2 c0 s
8 }# ]* s, {1 Y) m& ?# k' r G K! g2. 关于工艺控制, 严格执行 Appendix D 中 PCB 焊锡温度和时间的控制, 以下摘自 appendix D! N4 u' q( \+ L. I! m1 Y
Before a printed wiring board may be used, the current edition of the Recognized Component Directory, the Supplement, a copy of the printed wiring board company's Recognition Report or a copy of the Component Recognition (Yellow) Card must be checked to ensure that the solder temperature and time is as indicated and that the printed wiring board has flammability and operating temperature rating as specified in the Section General or in the individual Section description.
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4 p3 C6 T0 K6 q我还没有详细看这些 appendices, 是否还会有其他忽略的要求, 还不知道.
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所以, UL检查现在执行"细则要求" 更严格了, 亲身经历. 但不能说他们这样执行没有依据. 生产厂家还是要详细阅读"细则"中任何一个章节的要求. 尤其以前被忽略的 appendices.
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_7 u# u, X4 r- r$ s$ P% L; N# i不同产品种类, appendices 的内容可能会有所差异, 上传Direct Plug-In and Cord-Connected Class 2 Power Units (EPBU, EPBU2) 产品的 appendices 同大家分享. |
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发表于 2007-8-15 09:08
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