We are in the process of implementing rev D of J-STD-033. During the summer in Florida we are not able to maintain less than 60% relative humidity. The rev D document has Table 7-1 to derate due to factory conditions. 

I don’t understand how to interpret the table. At less than 5% RH, indefinite exposure time is allowed. That makes sense. However, at 30 C / 60% RH, standard conditions, for a level 3 part the table lists “7”, regardless of the body thickness. 
Table 5-1 indicates a level 3 part has a floor life out of the bag of 168 hours. 

Can someone tell me how to interpret Table 7-1. What does 7 mean?  

If this to too complicated to explain in an email, I may be contacted off-line. 

Dick Krug 
Sparton Electronics 
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352-540-4012