Transcription of IPC-TM-650 Originating Task Group TEST …
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IPC-TM-650 Originating Task Group TEST …
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.
4.2.2 Conductivity bridge and liquid conductivity cell appa- ratus capable of measuring specific resistances within a range covering at least 100 kΩ-cm to 20 MΩ-cm. 4.2.3 Deionization column. Barnstead HN Ultrapure Mixed
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