On 5/27/2011 10:58 PM, WarrenS wrote:
The Tbolt uses a special method to get high resolution data from its temperature sensor by combining three things. The first is the sensor's standard data output which is used for the most significant bits. This gives about 1 deg resolution. 2nd an internal register is used for the middle bits which gives resolution of 0.009 deg and then the Tbolt's firmware averages the internal register data to get the LS bits, with resolution (not accuracy) below 0.001 deg.
On 5/28/2011 4:12 AM, Mark Sims wrote:
The spikes are due to an artifact in the way the Tbolt firmware reads the temperature sensor chip. It reads two registers and combine the values to get a high-res temp reading. But if the firmware accesses the registers in-between the time that the temp sensor chip updates them it can produce a bogus value. Typically this seems to happen on average of once every couple of hours.
Warren and Mark, thanks indeed. This explains everything, and also some other idiosyncrasies I had noticed in the temperature graph display. All clear now :-) 73 Alberto I2PHD _______________________________________________ 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.
