Mil-P-55110E Table IX lists equivalence factors for 4 alternate methods. The equivalence factor for the Omegameter is 1.39. I don't know how accurate this factor is. I'm sure Brian has contributed on this subject in the past. Try the archives.

Geoff   

-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Macko, Joe @ IEC
Sent: Wednesday, October 26, 2005 3:28 PM
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


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