Jeff, You will probably want to examine your PCBs within a system since the humidity performance may vary. In general, it gets better if the internal power dissipation generates a higher temperature than the ambient.
You'll probably also want to look at transportation requirements (unpowered). This is often worst case. The standards that Richard points out are a great starting point. You may also be interested in the American equivalent of ETSI 300 019: Telcordia GR-63-CORE. There are some differences between the two documents. It's not free but is available at: http://www.telcordia.com/ Some other advice: Find out if your customers have any preference so that you don't have to repeat the tests. Cheers, Marko Radojicic Hardware Design Assurance, Maple Optical Systems [email protected] Phone: 408/545-1263 FAX: 408/434-9209 -----Original Message----- From: [email protected] [mailto:[email protected]]On Behalf Of [email protected] Sent: Tuesday, February 06, 2001 7:08 AM To: [email protected] Subject: RE: Humidity verification standard Jeff, take a look at the IEC 68 series of environmental standards. ETSI 300 019 is a series of environmental standards for telecom equipment. Those may give you some guidance. You can download those standards for free at the ETSI web site. http://www.etsi.org/ <http://www.etsi.org/> Richard Woods ---------- From: Bailey, Jeff [SMTP:[email protected]] Sent: Tuesday, February 06, 2001 9:39 AM To: 'emc-pstc' Subject: Humidity verification standard Hello group, I know this is a group focused on EMC/Safety issues, my primary function as well as most of yours is to deal with EMC/Safety issues but I think we all get other requests on the side so I'm hoping you can help. I have been asked to find a standard to verify environmental operating conditions for 5 - 95% RH (non-condensing). Can anyone guide me to a suitable standard for verifying such a range? (the products to be verified are printed circuit boards) Cheers! Jeff Bailey Compliance Engineering SST - A Division of Woodhead Canada Phone: (519) 725 5136 ext. 363 Fax: (519) 725 1515 mailto:[email protected] Web: www.sstech.on.ca All comments contained in the message are my own and do not necessarily express the views of SST/Woodhead Canada. ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: [email protected] Michael Garretson: [email protected] For policy questions, send mail to: Richard Nute: [email protected] ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: [email protected] Michael Garretson: [email protected] For policy questions, send mail to: Richard Nute: [email protected] ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: [email protected] Michael Garretson: [email protected] For policy questions, send mail to: Richard Nute: [email protected]
