Here's one more OEM's procedure when the RH falls below 30% (We have a continuous RH tester with an alarm set for 35%). We stop work until all workstations being used are set up with an air ionizer. Jim Marsico ITT Corporation 1500 New Horizons Blvd. North Amityville, NY 11701 631-630-5079 [log in to unmask] -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Gerald Bogert Sent: Wednesday, June 01, 2011 10:06 AM To: [log in to unmask] Subject: [TN] ESD Protection Verification Versus Humidity Below 30% June 1, 2011 J-STD-001E, paragraph 4.2.2 includes the following requirement; in part; "When humidity decreases to a level of 30% or lower, the manufacturer shall [N1D2D3] verify that electrostatic discharge control is adequate, ---" My question is, what does this mean in the real world??? Some of our OEMs just verify that personnel wrist-straps are continuing to work properly; if heel straps are used, they also verify these. At least one OEM stops work and dumps moisture into the air till the humidity is > 30%. Some OEMs have constant monitor wrist strap units and if one assumes the wrist strap is always connected to the monitor and the person, there would be no reason to do anything if humidity drops below 30% since the strap connection would be constantly monitored. Some OEMs claim that since they require all folks to verify their wrist straps in the morning that they need not do anything. I reject this argument since although humidity could have been > 30% in the morning, later in the day it could have dropped below 30%. While I recognize that there is a greater potential for component damage due to ESD when the humidity is below 30% than there is when humidity is much higher, if the ESD straps were functioning properly in the AM, I do not see how lowering humidity could cause the ESD protection to no longer function, and therefore why folks would need to do anything. Any input you can provide on this subject would be appreciated since both J-STD-001 and the 001 Handbook do not provide any insight on what needs to be done. [log in to unmask] ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 16.0 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 For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- This e-mail and any files transmitted with it may be proprietary and are intended solely for the use of the individual or entity to whom they are addressed. If you have received this e-mail in error please notify the sender. Please note that any views or opinions presented in this e-mail are solely those of the author and do not necessarily represent those of ITT Corporation. The recipient should check this e-mail and any attachments for the presence of viruses. ITT accepts no liability for any damage caused by any virus transmitted by this e-mail. ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 16.0 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 For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------