** Caution: EXTERNAL Sender ** In many digital devices, the Fahrenheit scale is an approximation to the Celsius scale. A number of years ago I bought a domestic quality digital indoor/outdoor thermometer which had a °C/°F switch. Its range was from -50°C to +50 °C. I did a number of tests on it, including checking he increments when I held the probe between my fingers. I noticed that when it was switched to °C, the indicated temperature went up in increments of 0.1°C, but when it was set to °F, it went up in increments of 0.2 °F for four successive increments, followed by a single increment of 0.1 °F. This cycle repeated itself.
This told me that the device was designed around a 10 bit ADV (1024 distinct values of which 1001 were used) with one bit being equal to 0.1°C. The Fahrenheit display was generated using firmware within the device. Martin -----Original Message----- From: USMA <[email protected]> On Behalf Of Bill Dengler via USMA Sent: 12 July 2025 05:42 To: Pierre Abbat <[email protected]> Cc: [email protected] Subject: [USMA 2151] Re: Thermostat in Celsius ** Caution: EXTERNAL Sender ** Many thermostats are dual-scale, I’ve set mine to degrees C. Bill Sent from my iPhone > On Jul 11, 2025, at 13:03, Pierre Abbat via USMA <[email protected]> > wrote: > > ** Caution: EXTERNAL Sender ** > > Yesterday the repairman came to fix the air conditioner and saw that > the thermostat was displaying 27 (it's been up to 33) and wanted to > switch it to Fahrenheit. I told him I don't use Fahrenheit. He said > he's seen a fair number of thermostats set to Celsius. How common is > it for thermostats in the USA to display in Celsius? > > The symptom was the same as the last time he came out: the fan motor > was quivering instead of turning. The cause, though, was different. > Last time he had to replace the whole fan/motor assembly because the windings > were broken. > This time it was just a faulty capacitor. > > Pierre > -- > When a barnacle settles down, its brain disintegrates. > Já não percebe nada, já não percebe nada. > > > > _______________________________________________ > USMA mailing list > [email protected] > https://lists.colostate.edu/cgi-bin/mailman/listinfo/usma _______________________________________________ USMA mailing list [email protected] https://lists.colostate.edu/cgi-bin/mailman/listinfo/usma _______________________________________________ USMA mailing list [email protected] https://lists.colostate.edu/cgi-bin/mailman/listinfo/usma
