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It's so easy!& u/ y! n7 k! \( _
IPI: it's the first inspection before your shipment, don't ship any products with UL mark without finishing the IPI." W3 J" E7 ^8 o5 D$ l6 I
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.
8 @, |! {( U! U% ~% X0 v$ y$ aIIP: now it's changed to IMP(increased monitor program), it's an pulish procedure., C% g9 I6 H8 s5 _: ?
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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