I am not in the business of producing electronics, but if these were all true, it means that defective electronics upon transportation by air should happen all the time. They don't.
I doubt seriously if DHL, UPS and whatever transporter specifies cargo conditions for every box they send on your or my behalf. And lot, yes lots of electronics get transported to this side of the ocean from the USA and between USA states using standard air transport methods. Standard might be semi pressurized but ... what's the difference in semi pressured cargo and full vacuum ( just another 20% of sucking force) anyhow ? And who is to be charged if pressure was lost in some cargo ? Let's draw a realistic conclusion that in general electronics do not suffer from air transports, unless...... Are there any people around in this group from component manufacturers that could shine their light on this and fill in the dots ? Do low cost detectors exist for detecting pressure loss, such as temperature colorizing strips and upside down detectors ? Regards, Gert Gremmen == Ce-test, Qualified testing == Consultants in EMC, Electrical safety and Telecommunication Compliance tests for European standards and ce-marking Member of NEC/IEC voting committee for EMC. Our Web presence: http://www.cetest.nl List of current harmonized standards http://www.cetest.nl/emc-harm.htm 15 great tips for the EMC-designer http://www.cetest.nl/features01.htm Support the International Red Cross Million 2000 Lottery: http://www.pluslotto.com/default.asp?urlref=3300008136443 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of James, Chris Sent: donderdag 4 juni 1998 8:45 To: '[email protected]'; [email protected] Subject: RE: Altitude Can't answer for all components but of interest we had problems shipping some types of MO discs (discs not drives) in even semi pressurised hold conditions, where they would crack due to internal pressures within the disc structure. Is it heated? If not it will be -50C or less also. It would seem logical that electrolytics would blow especially if subjected to a rapid pressure decrease. I've known people fly their push bikes from the UK to Europe without first reducing the pressure in the tyres only to find the tyres blown on arrival, again in semi-pressurised conditions. Note that pressurised cabins are only pressurised to around equivalent of 5k to 8k feet. Chris > -----Original Message----- > From: [email protected] [SMTP:[email protected]] > Sent: Wednesday, June 03, 1998 3:23 PM > To: [email protected] > Subject: Altitude > > This is not a safety or EMI question, but because this group has such > broad backgrounds and diversity I am hoping that someone can comment. > > I have been asked by one of our customers to ensure that our equipment > is capable of being shipped in an un-pressurized aircraft for > altitudes > of 30K to 40 K feet. This is a non operational requirement, but are > there other concerns I should be aware of? I recall hearing that some > commercial grade electrolytic could explode at high altitudes. > > Any comments or suggestions greatly appreciated. > > Rick Busche > Evans & Sutherland > Salt Lake City, Utah > [email protected]
