[time-nuts] Tbolt Temp Sensor
Arthur Dent
golgarfrincham at yahoo.com
Sun Apr 24 01:29:39 UTC 2011
"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
More information about the Time-nuts_lists.febo.com
mailing list