July 26, 2007 I have a question to pose for Tech Net folks based on my limited experience in this area. If I have a cleaning machine that includes a built in continuous test for rinse water or wash water resistivity, do I need to then still do an independent ionic contamination test using the standard DI Water/Alcohol Ionic Contamination test? If so why? What is the technical relationship between the two tests? Can one equate the cleaning machine Resistivity Test results to the J-STD-001 cleanliness limits or the results of the Ionic Contamination test? If so, how? Have folks experience shown that one can pass the cleaning machine Resistivity Test and still fail Ionic Contamination Test? Why? Doug, Pauls, as the worlds (wow) expert in this area, what do you say (It depends)???. --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------