The source of the requirement for extractive testing was MIL-P-28809 (now obsolete) which in turn referenced testing done by the Navy in Crane, Indiana. The odd units used in MIL-STD-2000A are a pure metrification of the requirements of 28809A. The difference between 10 micrograms/in^2 and the more commonly thought of 14 units/in^2 have to do with correction factors applied in MIL-P-28809A to recognize the more aggressive extraction by new (at the time of 28809A's release in 1981) automated cleanliness testers. I would note that the heated testers used today extract even more aggressively but this effect is only seen by comparing PWA data (not a NaCl control). Jim Maguire =============================== Jim Maguire Senior Principal Engineer Boeing Defense & Space Group PO Box 3999 M/S 3W-97 Seattle, WA 98124-2499 Phone (206)657-9063 Fax 657-8903 Email: [log in to unmask] ================================ > ---------- > From: ROBERT MEINERT[SMTP:[log in to unmask]] > Reply To: TechNet Mail Forum.;ROBERT MEINERT > Sent: Friday, October 03, 1997 9:02 AM > To: [log in to unmask] > Subject: [TECHNET] MIL-STD Cleanliness spec. > > Hello: Need someone to point me in the right direction for a > source > of MIL STD 2000A 5.3.5, Cleanliness testing/specification. Or, > if > that spec. is obsolete, the replacement and/or equivalent. > > thanks, > Robert Meinert > Hitachi Computer Products > Norman, OK > 405-360-5500 x174 > > ############################################################## > TechNet Mail List provided as a free service by IPC using LISTSERV > 1.8c > ############################################################## > To subscribe/unsubscribe, send a message to [log in to unmask] with > following text in the body: > To subscribe: SUBSCRIBE TECHNET <your full name> > To unsubscribe: SIGNOFF TECHNET > ############################################################## > Please visit IPC web site (http://www.ipc.org/html/forum.htm) for > additional information. > For the technical support contact Dmitriy Sklyar at [log in to unmask] or > 847-509-9700 ext.311 > ############################################################## > ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ##############################################################