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It's so easy!% I; f! e" W; Q4 L
IPI: it's the first inspection before your shipment, don't ship any products with UL mark without finishing the IPI.5 Y5 B9 ]# O' A/ D3 Y$ t) [
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.
) T3 R9 S b. ^( Y+ M: yIIP: now it's changed to IMP(increased monitor program), it's an pulish procedure.9 e* x" {" X) z/ x3 n& _
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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