We are changing the post-reflow washing window from 1 hour to 5 hours. However, in order to do it, we have to provide proof to our customer. One of the requirement is the SIR. Could you please show me what tool do I need and where to buy to do the SIR test. What is the most popular/approriate procedure to do it? Your help is greatly appreciated. *Stacy, Which SIR test you do depends on a couple of factors. If you have contracts for MIL-STD-2000A or J-STD-001, that will limit some of your choices. Even if you have MIL-STD-2000 contracts, you are only changing the cleaning time, not the flux, so you would not HAVE to do Appendix A testing. If your customer requires you to do SIR testing, they should tell you by what method, e.g. IPC-TM-650, method 2.6.3.3, and by what specification or criteria, e.g. J-STD-001, Appendix B. If you have some more lattitude in how you demonstrate that the longer cleaning time is OK, then SIR may not be the best testing to do. Environmental stress screening on actual hardware may be a better test than SIR to demonstrate that the longer cleaning time does not hurt the hardware. What fluxes and pastes are you using and what cleaning regimens. While Graham Naisbitt would be happy to sell you an AutoSIR for your testing (and a fine piece of hardware it is), to setup for SIR testing (and do it RIGHT) is very capital intensive, on the order of $75,000 or more. It sounds like you have a minimal need for SIR testing and you should go with one of the commercial labs that provide this service for a reasonable fee. If you want to talk about this in greater depth off-line, give me a call at 319-295-2109. Doug Pauls Rockwell Collins IPC SIR Task Group - Emeritus --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d 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 delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------