I may have missed it in the earlier postings but IPC-9201, Surface Insulation Resistance Handbook, has some information on test methodology that might be helpful. -- Brian McCrory Delsen Testing Laboratories, Inc. 1024 Grand Central Ave. Glendale, CA 91201 Phone: 818 247 4106 FAX 818 247 4537 email: [log in to unmask] URL: http://www.delsen.com/ ############################################################## TechNet Mail List 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://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or 847-509-9700 ext.5365 ##############################################################