Hi Daan, You can find information about that at http://www.timcousins.com.au/download/IonicContaminationHistory.pdf. I will also send you a paper discussing this off-line. Per-Erik Tegehall IVF, Sweden -----Ursprungligt meddelande----- Från: d. terstegge [mailto:[log in to unmask]] Skickat: den 27 september 2002 08:37 Till: [log in to unmask] Ämne: [TN] Ionograph measurements Hi Technet, One of our customers is complaining that the upper limit for our ionograph test is set at 3.1 micrograms/cm2 instead of the 1.56 micrograms/cm2 that the IPC/EIA J-STD-001C prescribes is section 8.3.6. I know there exists a document (probably an IPC or MIL-spec) explaining how the 1.56 limit should be corrected for the exact type of machine. For the Alpha Ionograph 500M the conversion factor is 2, resulting in the 3.1 micrograms/cm2 limit. However I can't remember where exactly this information can be found, and I don't even know if it's still valid. Does anyone has a clue for me ? Daan Terstegge Unclassified mail Personal Website: http://www.smtinfo.net ---------------------------------------------------------------------------- ----- Technet Mail List provided as a free service by IPC using LISTSERV 1.8e 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/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------- ----- --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8e 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/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------