This is what we do (weigh) at our avionics soldering facility for the LRF testing. I suggest that use a designed experiment to qualify the technique before you set up the process. What I mean by that is although the method may not be as accurate as you think you need you might find it adequate to define your flux application process. Gordy Seppanen Military Avionics Materials and Process Engineer Honeywell Inc.- Minneapolis [log in to unmask] _______________________________________________________________________________ To: [log in to unmask] From: [log in to unmask] on Wed, Sep 20, 1995 4:17 PM Subject: Flux Amount Does anyone have a good method for measuring the amount of flux applied to a board, on a wave solder machine by a spray drum fluxer. I'm trying to determine volume of flux applied at various drum RPM's. Only method I'm aware of is to weigh a piece of pr-cut mylar, apply flux, then weigh again. I want to use this to be able to baseline the wave solder equipment at the beginning of the shift and whenever a new batch of flux is received. Sounds crazy, but I have noticed differences in spray volume at same drum speeds, and same air pressure. I'm using a Soltec Sigma wave. Any better ideas ? Thanks in advance Al Boulais (603) 337-1253