[time-nuts] Tbolt Temp Sensor

[brent evers]

Great info Arthur - exactly what I was looking for.  Thanks for the
tip on the chip version.

My only question - what does one do with 50 TBolts?  Hopefully you
won't come up with a good enough reason for me to justify buying
more!!

Many thanks,

Brent

On Sat, Apr 23, 2011 at 9:29 PM, Arthur Dent <golgarfrincham at yahoo.com> wrote:
> "One of these units appears to have an onboard temp
> sensor that is dead - the temp just reads -55.0C all the
> time.  This is the little Maxim/DallasDS1620 chip, which
> I can replace, but I had a few questions first."
> ++++++++++++++++++++++++
>
> I've had about 50 Thunderbolts and at least 5 of them had
> a defective DS1620 chip. About 3 more were from late
> 2004 or early 2005 and had the "E" revision chip that
> displays the temp in about 3/4 degree steps. Of the ones
> that failed the common failure mode was to display
> -54.999 degree C even though I'm sure it wasn't quite
> that cold in my shop. ;-)
>
> If you replace the chip just make sure that the replacement
> chip is a "D" or "C" revision if you want the Lady Heather
> graph to look nice.
>
>  -Arthur
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