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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.

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.

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