[time-nuts] T-Bolt Temperature
Charles P. Steinmetz
charles_steinmetz at lavabit.com
Thu Aug 16 02:32:11 UTC 2012
>I have two Thunderbolts that I'm monitoring with
>Lady Heather. The temperature on the older unit
>(MFG 2/26/2004) seems to track the
>environment. The newer one (MFG 11-24-2004)
>shows 44.750000 °C and only changes in increments of exactly 1°.
Sounds like the newer one has the newer
temperature sender chip (DS1620). Briefly, the
chip manufacturer changed the innards and the
high-resolution display feature. Trimble did not
update the Tbolt, but continued to use the newer
version of the chip. IIRC, chip revisions prior
to E work properly in the Tbolt, while Rev. E
(and later, if such exist) do not. The cure is
to replace the IC with an older revision chip.
The archive has lots of information on this.
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