Bingo! I have been want to discuss this one for awhile. J-STD-001 states under 3.5 - Electrostatic Discharge, "...the manufacturer shall establish and implement an ESD control program in accordance with ANSI/ESD-20.20..." Since this requirement dictates the procedures to be used for controlling electrostatic discharge, why aren't the controls adequate no matter what the RH? I will agree there will be more susceptibility to static discharge at lower humidity. But, the referenced document in para 3.5 says nothing of environmental limits. So I am left to interpret this as, below 30% RH, make sure the procedure is being followed. What think ye. Gary Camac Guy Ramsey wrote: > It is more than solder paste, ESD, moisture sensitive components, board > storage, placmement equipment, cleaning chemistries all see RH as a > variable. J-STD-001 requires the manufacturer to verify that ESD > controls are adequate with RH drops below 30%. > > > -----Original Message----- > > From: TechNet [mailto:[log in to unmask]] On Behalf Of WEEKES, > > MICHAEL HS-SNS > > Sent: Thursday, October 03, 2002 9:55 AM > > To: [log in to unmask] > > Subject: Re: [TN] Temp Humidity Control - Do you? > > > > > > recommend 65 F to 75 F for temp and 30 to 50% RH - depending > > on your location, climate, size of shop this may be very > > expensive. It is common to rise above 50% rh in the Midwest > > in summer and below 30% rh in winter. I'd find robust solder > > paste which can handle out-of-range values before I'd shut a > > line down. > > > > Mike > > > > -----Original Message----- > > From: Henry Rekers [mailto:[log in to unmask]] > > Sent: Wednesday, October 02, 2002 2:24 PM > > To: [log in to unmask] > > Subject: [TN] Temp Humidity Control - Do you? > > > > > > How many of you out there are in full control of your > > temperature and humidity in your SMT facility? > > > > Do you track it? > > > > How tight do you control temperature? > > > > What do you use to control humidity? > > > > Any info would greatly help. We are uncovering some very > > interesting challenges as we move towards 24-7 and I just > > want to find out what others are doing. > > > > Thanks. > > > > -------------------------------------------------------------- > > -------------- > > ----- > > Technet Mail List provided as a free service by IPC using > > LISTSERV 1.8e 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 or > > (re-start) delivery of Technet send e-mail to > > [log in to unmask]: SET Technet NOMAIL or (MAIL) > > To receive ONE mailing per day of all the posts: send e-mail to > > [log in to unmask]: SET Technet Digest > > Search the archives of previous posts at: > > http://listserv.ipc.org/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 > > -------------------------------------------------------------- > > -------------- > > ----- > > > > -------------------------------------------------------------- > > ------------------- > > Technet Mail List provided as a free service by IPC using > > LISTSERV 1.8e 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 or > > (re-start) delivery of Technet send e-mail to > > [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE > > mailing per day of all the posts: send e-mail to > > [log in to unmask]: SET Technet Digest Search the archives of > > previous posts at: http://listserv.ipc.org/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 > > -------------------------------------------------------------- > > ------------------- > > > > --------------------------------------------------------------------------------- > Technet Mail List provided as a free service by IPC using LISTSERV 1.8e > 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) > To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest > Search the archives of previous posts at: http://listserv.ipc.org/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 > --------------------------------------------------------------------------------- --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8e 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/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 ---------------------------------------------------------------------------------