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It's so easy!3 a6 V" r' ^" q8 B6 R' H) Y
IPI: it's the first inspection before your shipment, don't ship any products with UL mark without finishing the IPI.4 ^- s1 u# m$ i% h2 V8 ?' 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.$ B- h2 {- H+ y: |6 Y8 t
IIP: now it's changed to IMP(increased monitor program), it's an pulish procedure.6 l: l& M8 a' S9 o
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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