NOT WHERE I WORK! YUCK -----Original Message----- From: Hogg, Blair K. [mailto:[log in to unmask]] Sent: Thursday, October 03, 2002 2:11 PM To: [log in to unmask] Subject: Re: [TN] ESD ISSUE - bare skin with static straps Are you advocating a naked work force? -----Original Message----- From: Gene Felder [mailto:[log in to unmask]] Sent: Thursday, October 03, 2002 1:30 PM To: [log in to unmask] Subject: Re: [TN] ESD ISSUE - bare skin with static straps Typically natural fibers are low charging. Synthetic fabrics are very high charging. Eliminating clothing would be good for ESD control. The ESD Smock shields (creating a type of Faraday Cage) the employees clothing from ESD sensitive items. Via the person's sweat layer, charges are removed from the person using wrist straps (or ESD footwear & ESD flooring). Some information from the ESD Handbook TR 20.20: ESD Handbook TR 20.20 paragraph 5.3.13.1 Introduction and Purpose/ General Information "While a person may be grounded using a wrist strap or other grounding methods, that does not mean that insulative clothing fabrics can dissipate a charge to that person's skin and then to ground. Clothing usually is electrically separate or isolated from the body." Per ESD Handbook TR 20.20 paragraph 5.3.13.3.1.3 Garment Construction "The electrical integrity of the seams is critical and should be verified by electrical continuity measurements between all panels of the garment (ESD STM 2. 1)." ESD Handbook TR 20.20 paragraph 5.3.13.2.6 Proper Use "After verifying that the garment has electrical conductivity through all panels, the garment should be electrically bonded to the grounding system of the wearer so as not to act as a floating. This can be accomplished by several means: 1. Ground the garment to the body through a wrist strap-direct connection with an adapter 2. Ground the garment through a conductive wrist cuff in direct contact with the skin of a grounded operator 3. Ground the garment through a typical separate ground cord, directly attached to an identified groundable point on the garment 4. Garments should be worn with the front properly snapped or buttoned to avoid exposure of possible charges on personal clothing worn under the garment" Per ESD Handbook TR 20.20 paragraph 5.3.13.6 Other Considerations "For personnel safety, static control garments should not be worn in situations where there is exposure to high voltage." Gene Felder [log in to unmask] -----Original Message----- From: Genny Gibbard [SMTP:[log in to unmask]] Sent: Thursday, October 03, 2002 7:54 AM To: [log in to unmask] Subject: Re: [TN] ESD ISSUE << File: ATT00010.html >> I was just wondering about really hot conditions. Maybe my real question is: Is a smock better protection than bare skin with static straps? Just curious. And I plead the fifth on the K-Mart question. Or am I allowed to plead the fifth in Canada? Don't answer that... -----Original Message----- From: Randy Bock Sr. [mailto:[log in to unmask]] Sent: October 3, 2002 6:50 AM To: TechNet E-Mail Forum.; Genny Gibbard Subject: Re: [TN] ESD ISSUE ESD is as big deal. To protect the equipment you have to take what ever precautions are necessary, including smocks. If you have ever worked in a clean room and have had to wear a bunny suit with hood and foot boots over your shoes, and white gloves you will then discover the real meaning of the word uncomfortable. A smock, any day. Randy Bock Sr. Quality Manager Bryce [log in to unmask] <mailto:[log in to unmask]> 203 729-5370 Ext 239 ----- Original Message ----- From: Genny Gibbard <mailto:[log in to unmask]> To: [log in to unmask] <mailto:[log in to unmask]> Sent: Wednesday, October 02, 2002 4:30 PM Subject: Re: [TN] ESD ISSUE Is it as much a hazard as it is being portrayed? If the conditions are hot enough that people are uncomfortable wearing smocks, they probably won't be wearing long sleeve shirts that can dangle in what you're working on. In fact, they are probably wearing the least they can get away with at their place of employment - tank tops and shorts if allowed. If they wear a static strap, and heel strap, are they really in that much ESD risk? They might be at more risk for safety issues - solder splashes, cuts, etc., than ESD issues. -----Original Message----- From: Gregg Klawson [mailto:[log in to unmask]] Sent: October 2, 2002 11:51 AM To: [log in to unmask] Subject: Re: [TN] ESD ISSUE Jim, Higher humidity can lower the ESD risk but have them wear the smocks to be safe. Besides the humidity levels, it depends on what your operators are wearing. Cotton, polyester or nylon have different triboelectric properties so build up charge at different rates and amounts. Think about how much static builds up on your polyester socks versus your cotton socks in your clothes dryer at home. -- Gregg At 08:00 AM 10/2/2002, you wrote: Good day Technetters: I need some opinions (this may be asking for trouble!). Located in the north east, temperature/humidity levels can change on a daily basis. It has been our policy that, during summer months when the humidity is high, the operators do not have to wear ESD smocks in areas that are not air conditioned. There is no hard fast rule as to what the conditions shall be, except that a decision is made (by yours truly) that smocks are optional when conditions are uncomfortable. I'm trying to select a specific humidity level to use as a criteria for the mandatory wearing of smocks. I understand that not wearing ESD smocks poses a risk, but the risk is minimized during high humidity conditions. What do you think of this policy? Any recommendations on a humidity level? Thanks, Jim Marsico Senior Engineer Production Engineering EDO Electronics Systems Group [log in to unmask] < mailto:[log in to unmask] <mailto:[log in to unmask]> > 631-595-5879 ------------------------------------------------------------------------ ---- ----- 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 <http://listserv.ipc.org/archives> Please visit IPC web site http://www.ipc.org/html/forum.htm <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 ------------------------------------------------------------------------ --------- ---------------------------------------------------------------------------- ----- 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 ---------------------------------------------------------------------------------