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It's so easy!( |) A* b. n9 L# v; X; F q
IPI: it's the first inspection before your shipment, don't ship any products with UL mark without finishing the IPI.% h& _! X0 N4 t' ^! L' {( ?! v
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. W: H) a9 n* p2 b4 z& F0 J, `
IIP: now it's changed to IMP(increased monitor program), it's an pulish procedure.. j1 ]# e4 L$ d9 {8 [
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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