29 Apr
2004
29 Apr
'04
1:08 p.m.
On Apr 29, 13:01, Mark Tapley wrote:
I have forgotten, did we ever have a discussion about
whether
scanners/photocopiers/etc. have enough UV content in their lights to
erase UV-EPROMs, if the sticker has come off? I sort-of recall we
did, but don't remember the outcome.
I don't remember that exact discussion, but if we had it, my input
would have been along the following lines.
Firstly, most scanners and photocopier use visible light and have very
little if any UV output. Secondly, EPROMs are only susceptible to
short wavelength UV, which doesn't go through glass very well. Lastly,
it takes about 20 minutes to erase an EPROM an inch away from a normal
eraser's tube, and a few minutes to begin to do much harm, so the
second or so it would be exposed in a scanner is inconsequential.
In other words, don't worry about it :-)
--
Pete Peter Turnbull
Network Manager
University of York