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| Thread ID: 47566 | 2004-07-30 04:52:00 | Too cold for a computer??? | kewefella (2092) | Press F1 |
| Post ID | Timestamp | Content | User | ||
| 1357120 | 2004-07-30 06:32:00 | ........unless you use process fluid lubrication.........like the liquid oxygen expansion turbines we used to make at Joe Lucas.......... | Terry Porritt (14) | ||
| 1357121 | 2004-07-30 07:29:00 | > I wouldnt be blowing hot air from a hairdryer over a > motherboard, hot air from a hairdryer has a high > level of static electricity You have to get the nozzle close enough for a discharge to take place into suitably delicate components, and I don't think a hair dryer will induce much static anyway. The outgoing air passes over a heating element that is pretty much at ground potential in relation to static voltages, and the air velocity isn't really enough either. Compressed air hoses and vacuum cleaners with plastic nozzles are a greater risk, though I have been vacuuming and air-blowing electronics for more years than I care to remember without any (known :8} problems). The compressed air can is a lesser risk too, but with high velocity out of a small plastic nozzle ina low humidity environment I guess it could generate some charge. I have a couple of serious static-voltage measuring instruments so I might try some experiments and see what I can measure. Cheers Billy 8-{) |
Billy T (70) | ||
| 1357122 | 2004-07-30 07:57:00 | I know someone who used to keep their PC wrapped up in an electric blanket during the winter. His problem was the HD. I wouldn't think the temp would affect the psu except for the fan. | mikebartnz (21) | ||
| 1357123 | 2004-07-30 08:43:00 | I read about an old computer in Electronics australia that had problems starting in cold weather. Maybe it IS the temperature. Get an AMD system - they never get too cold :) |
agent_24 (4330) | ||
| 1357124 | 2004-07-30 08:46:00 | Just a drifting off topic observation from doing a quick Google, the military specifications governing testing of ruggedised electronics seem to be contained in MIL-STD 810. MIL-STD 810F methods 502.4 and 501.4 specify operation from -20C to +60C and storage from -40C to +75C, so 'absolute zero', whilst ok maybe for some solid state electronic devices, may not be that good an idea for computers :) Back in the bad old days of the cold war when interceptor jet fighters were parked on runways above the arctic circle in mid winter like the English Electric Lightning, and I worked on the small gas turbine engines that were used to spin up the main jet engines, these systems had to be up and running at full speed within 60 seconds of pressing the start button, something like 80,000rpm. That was quite some feat with oil like treacle at those temperatures. |
Terry Porritt (14) | ||
| 1357125 | 2004-07-30 09:22:00 | The latest Pentiums don't get too cold either. In fact they run hotter than AMD's. | mikebartnz (21) | ||
| 1357126 | 2004-07-30 09:37:00 | you obviously haven't met my MR. Duron. | agent_24 (4330) | ||
| 1357127 | 2004-07-30 09:42:00 | (who got his L2 cache demolished by a heavy heatsink) | agent_24 (4330) | ||
| 1357128 | 2004-07-30 10:25:00 | > Cold isn't normally an issue with computers, the > colder the better really. > > What the cold may do in a moist environment is cause > water vapour to reach dew point, especially where it > comes into contact with (say) metal which is colder > than the surrounding air temperature and moisture. > Condensation and electronics don't mix too well. 5-8 > deg is easily within the dew point of water vapour > but it will also depend on Relative Humidity (RH), > the colder it is the less RH% is required to reach > dew point so the air does not need to be very moist > to cause a problem. > > Cheers Murray P Would there be a slight exchange occurring here between relative and absolute humidity ? From memory, the dew point occurs when relative humidity reaches 100%, and can occur at any temperature between 0 and 100 deg. C dependent on the absolute humidity. Why should the metal be > > "colder than the surrounding air temperature and moisture."?? If the ambient temp is falling, the metal will be warmer ! Once the air temp stabilises, the metal will reach ambient gradually as well. (Assuming the power is off :) ) The metal will "feel" cooler, because it is a better conductor than air, and absorbs heat from your testing pinky faster. Now isn't that a load of irrelevant twaddle? Sorry, but I feel better now. Time for the tablets R |
R2x1 (4628) | ||
| 1357129 | 2004-07-30 11:09:00 | I don't have an answer, just my experience. My apartment ranges from 5 degrees in the winter (when it's snowing) to frequently as high as 37 degress in the summer with 65% humidity (the kind I've never experienced in nz). It doesn't affect my Pentuim 4 2.4GHz machine. Dan |
nadius (3249) | ||
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