Technetters,

We would like to have the capability to weigh PCBs in order to evaluate 
moisture content. IPC-TM-650 2.6.28 (proposal inside IPC 1601 (draft) ) 
suggests I need a scale with accuracy down to 0.0001g. I have a hard 
time finding something and I was wondering if anyone has "real world" 
experience weighing PCBs and what type of scale they use.

I have a 12 layer 8" x 10" board that weighs around 4 oz. If we assume 
for sake of argument that this board has reached it's maximum moisture 
absorption level. After baking this bone dry, what percentage (ballpark) 
weight reduction should we see?

Any advice is appreciated.

Thank you.

-- 
Leif Erik Laerum

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