Harvey ; try : http://www.bidservice.com ; if you're on budget ; yes the 1 hour is usual (IPC-SM-785) ; unless you build to the -65+125 (MIL), that's extreme . Standard you can get from IPC : http://www.ipc.org ; and the fellow who wrote it is very helpful ; get the standard (whichever you have to work to) BEFORE you'll go shopping . Yes , if you'll get close to 10'C/min you'll be better off ; but out of pocket , you'll have to estimate how fast will you be required to get the results and calculate them into your program ; some drag for half a year ; or more still . Fast chambers are more or less made to specs ; you're right there . You'll need a failure monitor as well : email : [log in to unmask] : John Sofia or Craig Desrosiers ; and a PC . Makers by dozens on web, search . See you Paul Klasek http://www.resmed.com > ---------- > From: Harvey M Phillips, Dr[SMTP:[log in to unmask]] > Sent: Monday, 20 July 1998 12:18 > To: [log in to unmask] > Subject: [TN] Thermal Cycling Chambers > > Dear TechNetters, > > I am very new to the PCB industry, so please allow me to ask a stupid > question. > > When talking to people about thermal cycling, I keep hearing that one > thermal cycle is completed in about one hour. For instance, a recent > TechNet posting spoke of a thermal cycling test from -65 C to 125 C > with a 30 minute dwell and a 38 minute transfer. I assume that the > term > "38 minute transfer" means that you go from one extreme temperature to > the other in 38 minutes. This would mean a heating/cooling rate of 5 > degrees/min., if I am calculating correctly. A complete cycle would > then be completed in 2 hrs. 16 min. > > My difficulty is that all the chambers I have seen from vendors only > have a heating/cooling rate of about 3 degrees/min. We are a new > research institute and plan to buy some thermal cycling chambers soon, > but I don't want to buy something that won't meet our needs. > > Does everyone now have special chambers made? Can anyone recommend > some > manufacturer who can meet the specs of heating/cooling rates > 5 deg. > C/min.? > > Any input you can give me would be greatly appreciated. Thanks in > advance. > > Best regards, > Harvey Phillips > > Harvey M. Phillips > Research Fellow > Institute of Materials Research and Engineering > Block S-7, Level 3 > National University of Singapore > Singapore 119260 > > TEL: (+65) 874-4314 > FAX: (+65) 872-0785 > > email: [log in to unmask] > > temporarily attached to: > Gintic Institute of Manufacturing Technology > 71 Nanyang Drive > Singapore 638075 > > TEL: (+65) 793-8539 > FAX: (+65) 792-2779 > > ################################################################ > 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's web site (http://www.ipc.org) "On-Line Services" > section for additional information. > For technical support contact Hugo Scaramuzza at [log in to unmask] or > 847-509-9700 ext.312 > ################################################################ > ################################################################ 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's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################