Gabriela, You can't use SERA as set up with the borate buffer, but with a different buffer, and I think in a circulating mode, you can do what you are asking. The technique is called PESO. Contact Dave Hillman at Rockwell Collins 319-295-1615 or Peter Bratin at ECI, who make the SERA tester. They can give you the details. regards, Bev Christian Nortel >---------- >From: Gabriela Bogdan[SMTP:[log in to unmask]] >Sent: Wednesday, March 11, 1998 6:06 PM >To: [log in to unmask] >Subject: [TN] Contact resistance > >Dear Technetters! >We experience high contact resistance on keyboards. >The plating is 0.15u Au on 6u Ni. >1.Could I use SERA in order to see if there is a contamination on the >keypads >in comparison to the bare boards? >2.If YES, HOW? >3.How could I compare the porosity of the gold plating of two different >batches ? >Thank you in advance >Gaby > >################################################################ >TechNet E-Mail Forum 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://jefry.ipc.org/forum.htm) for additional >information. >For the technical support contact Dmitriy Sklyar at [log in to unmask] or >847-509-9700 ext.311 >################################################################ > > ################################################################ TechNet E-Mail Forum 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://jefry.ipc.org/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ################################################################