Arthur, On 7 June 2010 02:21, Arthur Dent <golgarfrinc...@yahoo.com> wrote: >>On 6 June 2010 09:42, Arthur Dent <golgarfrincham at yahoo.com> wrote: >>> After about mid 2004 the DS1620 thermometer chip was the "E" >>> version that displays the temperature in steps of maybe 1 degree. >>> I've replaced a few of these chips with "C" versions that correct the >>> graphing problem and make the T-bolts work properly. Unless you >>> want to find and replace the surface mount chip yourself, make >>> sure any late model (after mid 2004) t-bolt has a "D" or a "C" chip, >>> not an "E". > >>What happens when you have a TB dated 7/11/03 with a thermometer chip >>that is labelled:- > >>DS1620 >>031001 >>810AA > >>No other markings? > >>Thanks, >>Steve > +++++++++++++++++++++++++++ > Steve, If you check closely I think you'll find that the line you read as > "031001" is actually 0310D1" where the 5th character is a capital "D". > The 03 is the year and the 10 may be the month of the year. The D1 is > the revision code. The "C" version was before maybe 2000 so you won't > see those unless they are used as replacements and the "E" revision > wasn't used until late 2004.
Many thanks for your excellent explanation of this. Seems my old tired eyes even with a magnifying glass were not up to the task. It's ironic that the older we get the smaller they make the parts. Best regards, Steve > -Arthur > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > -- Steve Rooke - ZL3TUV & G8KVD The only reason for time is so that everything doesn't happen at once. - Einstein _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.