Numerous people use the Pyramax oven to process high temp solder but your success will depend upon the mass of your board.
To maximize the probability of success you should use the highest convection rate (IWC) possible to enhance heat transfer and use a nitrogen atmosphere to expand the process window. By using high convection rates you increase the impingement velocity of the gas and thus the heat transfer efficiency in a convection oven. The use of a nitrogen slows the oxidation of the joints thus extends the time flux works.
A few additional comments: 1. Be sure that the thermal barrier that you use on your profiler will protect it for the time and temperature you will be running. 2. I suggest that you use TCs with fiberglass insulation which is good to 482 C instead of Kapton which is limited to 316 C. 3. Some Pyramax ovens have a 400 C option but it is safe to assume that yours is the standard 350C – In some cases it is possible to upgrade an oven to 400C or by talking with the factory be able to run at 360C without making any physical changes.
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