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It's so easy!
9 K2 b, c E, DIPI: it's the first inspection before your shipment, don't ship any products with UL mark without finishing the IPI.8 V9 d/ \5 |9 u; x: J: ?
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.$ Z0 v/ u( P# T2 C" j4 N7 L. W, E
IIP: now it's changed to IMP(increased monitor program), it's an pulish procedure.9 v4 \3 }7 p8 @6 q9 c7 H# D
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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