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It's so easy!/ N6 \4 N+ o3 x" _
IPI: it's the first inspection before your shipment, don't ship any products with UL mark without finishing the IPI.& R, T3 d4 Q7 Q8 f- d3 u
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.
9 I, B" Y" L% ?, X! H1 l* PIIP: now it's changed to IMP(increased monitor program), it's an pulish procedure." f. \/ n( O# s6 V( y# t1 m
VN: 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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