Transcription of IPC-TM-650 Originating Task Group TEST METHODS MANUAL
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IPC-TM-650 Originating Task Group TEST METHODS MANUAL
1 PurposeThese tests are used as process controltools, they can be used to inspect printed wiring boards orprinted wiring assemblies and determine if they conform to themonitoring level of the user s performance specification. Bulkionic cleanliness testing may be accomplished by measuringthe ionizable surface contaminants extracted by the followingthree METHODS :1. MANUAL extraction method2. Dynamic extraction method3. Static extraction RestrictionsMeasurements of ionic conductivities donot differentiate between different ionic species. They simplymeasure conductivities (or resistivities) which can be related toamounts of ionic materials present in solution. There is noidentification of the contribution to the total conductivity read-ings of any individual ionic species which may be present inthe solution. For measurement of individual ionic species (typeand level of residue) see IPC-TM-650 , Test Method ,Ionic Analysis of Circuit Boards, Ion Chromatography simplicity, amounts of ionic materials in solution can beexpressed by a conductivity factor which is equivalent to themeasured conductivity contributed by a known amount of astandard strongly ionized salt such as sodium chloride (NaCl).
4.4.3 Suspend the test specimen within a convenient sized funnel positioned over a graduated cylinder. Care must be taken not to handle the sample or any of the appliances used to …
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