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It's so easy!* u, X4 y7 G$ o" B6 y l
IPI: it's the first inspection before your shipment, don't ship any products with UL mark without finishing the IPI.. Z+ | V" T' B
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.
1 }$ P" Q6 ~! b6 K3 aIIP: now it's changed to IMP(increased monitor program), it's an pulish procedure.6 f: p! @3 F8 N- q4 p1 q# H, H
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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