That's probably true and MIL-PRF-55110F1 has a nice table for this that includes; ug/sq in ug/sq cm OmegaMeter 14.00 2.20 Ionograph 20.00 3.10 Zero Ion 37.00 5.8 ICOM 5000 22.00 3.4 Keep in mind, if your system heats the solution the number would be adjusted for that (refer to your owners manual I suppose) Franklin -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Macko, Joe @ IEC Sent: Wednesday, October 26, 2005 9:28 AM To: [log in to unmask] Subject: [TN] Omegameter to IPC-TM-650, Method 2.3.25 cross reference Fellow techs, Good morning. We have an Omegameter 600SMD that is used to check boards for ionic contaminates. The ionic residue limit within J-STD-001C, para. 8.3.6 is 10 ug/sq. NaCl. Some personnel believe that this number should be adjusted based on the actual instrument used (e.g., an Omegameter). Would someone be so kind as to comment on this subject and what the correct limit is for an Omegameter type of instrument. Thanks joe --------------------------------------------------- Technet Mail List provided as a 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/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a 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/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------