We are using an inline aqueous washer with saponifier to clean smt assemblies with rosin based no-clean solder paste. Looking for a reliable, cost-effective way to monitor the cleanliness of the assemblies after cleaning. Any recommendations?
A fairly painless method for monitoring cleanliness is Resistivity Of Solvent Extract [ROSE]. Equipment is: * Omegameter * Ionograph * Ion Chaser [Zero-Ion]
Anyone who desires to use an Resistivity Of Solvent Extract tester should read EMPF report RR000013, "An In-Depth Look at Ionic Cleanliness Testing".