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It's so easy!
% _3 z8 i" E6 v! _- ^IPI: it's the first inspection before your shipment, don't ship any products with UL mark without finishing the IPI.! L$ w- u; \/ @% C
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.
* ]& G' S( P: c4 G% L. F. v; sIIP: now it's changed to IMP(increased monitor program), it's an pulish procedure.
( P. l9 v( {- O5 E8 n, x0 ?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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