Try Ion Chromatography.  You should be able to get a good signature if there
is a gel residue present.  Contact somebody like CSL.
  -----Original Message-----
  From: TechNet [mailto:[log in to unmask]]On Behalf Of Bogert
  Sent: Tuesday, September 04, 2001 6:15 PM
  To: [log in to unmask]
  Subject: [TN] Use of Omegameter for Cleanliness Testing of PWAs that have
been Conformal Coated


  9/4/2001
  My question is, would an Omegameter 600 ionic tester, or equivalent,
identify the presence of conductive conformal coating removal gel after Type
UR conformal coating was re-applied after rework to remove coating using the
conductive stripper (the stripper was manufactured by, and recommended by,
the Type UR conformal coating manufacturer).  Obviously if the gel was
trapped under the re-applied conformal coating, the test would not detect
its presence.  However, if the test was performed prior to re-applying the
conformal coating, would it yield any results that would be useful?  Also,
what impact would the alcohol in the test solution have on the Type UR
coating.