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It's so easy!
% o E: V: [ V: [% kIPI: it's the first inspection before your shipment, don't ship any products with UL mark without finishing the IPI.
' F" |: J6 l1 `6 K4 t5 jRegular 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.
% P l9 ~; I; C) I1 e& f+ g# [: S4 QIIP: now it's changed to IMP(increased monitor program), it's an pulish procedure.4 F4 X4 ?- s- O( 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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