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From: Larry on 3 Aug 2010 10:30 -hh <recscuba_google(a)huntzinger.com> wrote in news:cdef108d-a3ec-4eb1-a1e8- 927e323dab51(a)v15g2000yqe.googlegroups.com: > Agreed, but chamber testing classically doesn't also include the > complexity of solar loading. YMMV to what degree you want to include > this as 'weather', but it is certainly an environmental factor. > IIRC, more insight can be found in AR 70-38: peak solar loading can > add up to ~0.1W/cm^2 to an exposed device. Subsequent surface > temperatures can be +25C greater than ambient, and IIRC, the "becomes > intolerable to touch (5 seconds exposure)" threshold is +145F. > > Maybe they figured because you can't watch the glossy screen outside in the sunlight, it wasn't necessary to calculate how much heat it was gonna get being used on the beach! Maybe that's why they have the stupid mirror in front of the picture! It discourages them from trying to use it outside a darkened room! -- iPad is to thermal engineering what WebTV is to computers. Larry
From: Larry on 3 Aug 2010 10:32 SMS <scharf.steven(a)geemail.com> wrote in news:4c581d2d$0$1676 $742ec2ed(a)news.sonic.net: > It's not unreasonable for users to expect a > tablet to operate at higher temperatures, but they should have checked > the specs before buying it for outdoor use in hot climates. > It's all the driver's fault because they didn't check the specs to see the damned car would only do 35mph with a V-8 engine before they bought it. Real nice.......smart! -- iPad is to thermal engineering what CO2 is to global warming. Larry
From: -hh on 3 Aug 2010 10:34 On Aug 3, 9:44 am, SMS <scharf.ste...(a)geemail.com> wrote: > -hh wrote: > > ... > > Agreed, but chamber testing classically doesn't also include the > > complexity of solar loading. YMMV to what degree you want to include > > this as 'weather', but it is certainly an environmental factor... > > Since you cannot use a tablet under direct sunlight, solar loading is > not all that relevant, though I suppose that a tablet could be on while > not being used, and be left in direct sunlight. Pendantically, only the screen needs to be shaded, so if one were to sit while facing into the sun, this would place the solar radiation on its back. However, the far more likely situation is as you suggest, which is the temporary "sit it down on the table in the sun" mode. > In any case, since the iPad's specified upper temperature limit for > ambient temperature is 95 degrees F, the question is whether it's > shutting down below that. If not, then the lawsuit is groundless since > it's operating within spec. Precisely. > It's not unreasonable for users to expect a > tablet to operate at higher temperatures, but they should have checked > the specs before buying it for outdoor use in hot climates. Agreed, and as I alluded to earlier, a familymember didn't have any problems with theirs in the Caribbean in April/May, with daily highs running ~88F over a continuous two week period ... and yet this class action was IIRC filed by some guy in **Northern** California. AFAIC, it is immediately evident that solar loading and the "sat it down to heat soak in the sun" was likely present, and this all reminds me of the Insert-Ethnic-Group-Here joke about their national space program which was going to send their Astronauts to the Sun... -hh
From: John Navas on 3 Aug 2010 12:53 On Tue, 03 Aug 2010 09:34:31 -0700, in <alangbaker-B8F5CB.09343103082010(a)news.shawcable.com>, Alan Baker <alangbaker(a)telus.net> wrote: >In article ><7893511e-6ad1-4bcd-986b-8ac8fe6441a5(a)d17g2000yqb.googlegroups.com>, > MuahMan <muahman(a)gmail.com> wrote: >> Apple fucked up another product, they are getting sued again. Deal >> with it you Apple apologist. > >...and who ignored that other portable computing products have the same >heat limitations. They do? Which ones? I've never had this kind of thermal issue with a cell phone or an Acer netbook even in pretty harsh conditions. The apologies here, starting with the "technical" nonsense posted by Steven, are a sorry commentary on Apple engineering. -- John "Assumption is the mother of all screw ups." [Wethern�s Law of Suspended Judgement]
From: Alan Baker on 3 Aug 2010 12:56
In article <l6ig569fjhpfb83o2t1jtsbnu1tq2bja45(a)4ax.com>, John Navas <spamfilter1(a)navasgroup.com> wrote: > On Tue, 03 Aug 2010 09:34:31 -0700, in > <alangbaker-B8F5CB.09343103082010(a)news.shawcable.com>, Alan Baker > <alangbaker(a)telus.net> wrote: > > >In article > ><7893511e-6ad1-4bcd-986b-8ac8fe6441a5(a)d17g2000yqb.googlegroups.com>, > > MuahMan <muahman(a)gmail.com> wrote: > > >> Apple fucked up another product, they are getting sued again. Deal > >> with it you Apple apologist. > > > >...and who ignored that other portable computing products have the same > >heat limitations. > > They do? Which ones? I've never had this kind of thermal issue with a > cell phone or an Acer netbook even in pretty harsh conditions. The > apologies here, starting with the "technical" nonsense posted by Steven, > are a sorry commentary on Apple engineering. For a start, the ones already mentioned in the material you snipped. -- Alan Baker Vancouver, British Columbia <http://gallery.me.com/alangbaker/100008/DSCF0162/web.jpg> |