WS6536E does say facilities to be in accordance to MIL-STD-1695. Do not know what that said. MIL-STD-2000 para 5.4.9.2 says temperature shall be maintained at 75 plus or minus 9 degrees F and the relative humidity shall not exceed 65 percent. It also says when the humidity decreases to a level of 30 percent or lower, ESD devices shall be processed with extraordinary controls in accordance with MIL-STD-1686. ---------- From: [log in to unmask] To: [log in to unmask] Cc: [log in to unmask] Subject: Re: Temp. and RH Date: Monday, July 08, 1996 4:35PM Hi! There is a fair possibility that your "requirements" are from the Weapons Specification 6536 which contained temp and humidity requirements for assembly. I can't find a copy of 6536 but I believe that it bounced the reader to another Mil spec (1695??)which contained stuff on temperature, dust, lighting, humidity, etc. Chase this lead down and see if it is helpful. Good Luck. Dave Hillman Rockwell Collins [log in to unmask] ______________________________ Reply Separator _________________________________ Subject: Temp. and RH Author: [log in to unmask] at ccmgw1 Date: 7/3/96 9:53 AM Our PWB assembly facility is in a controlled environment kept at 72 degrees F, and 50% R.H. The problem is, we don't remember how we decided these were the best conditions. Does anyone know of an IPC document or other source stating the best environmental conditions for PWB assembly (including SM assembly)? Any info. is appreciated. Thank you. The mail list is provided by IPC using SmartList v3.05 To unsubscribe from this list at any time, send a message to: [log in to unmask] with <subject: unsubscribe> and no text. The mail list is provided by IPC using SmartList v3.05 To unsubscribe from this list at any time, send a message to: [log in to unmask] with <subject: unsubscribe> and no text.