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It's so easy!
6 h* F* V9 z) ], e% {/ z$ M5 iIPI: it's the first inspection before your shipment, don't ship any products with UL mark without finishing the IPI.3 @' M, {7 m' H( r
Regular inspection: after the IPI, normally, for R file, there will be four times follow up inspection per year for UL, but for L file, it depends on the output of your products.
0 ?% v/ ]+ p4 |; \. r v2 [2 I/ MIIP: now it's changed to IMP(increased monitor program), it's an pulish procedure.
! B$ S# T/ h: K1 d' A+ s: f9 cVN: variation notice/finding, if found, the UL auditor will issue VN, mayby hold-shippment is required, now UL will fine the factory for the VN. |
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