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Can you give us the model number and brand name of the thermometer you are trying to change? If you have a calculator you can do the math. To convert temperatures in degrees Fahrenheit to Celsius, subtract 32 and multiply by .5556 (or 5/9). Here are some examples for you:
Example: Convert 26° Celsius (a nice warm day) to Fahrenheit
How to convert Fahrenheit to Celsius 0 degrees Fahrenheit is equal to -17.77778 degrees Celsius: 0 °F = -17.77778 °C The temperature T in degrees Celsius (°C) is equal to the temperature T in degrees Fahrenheit (°F) minus 32, times 5/9: T(°C) = (T(°F) - 32) × 5/9 or T(°C) = (T(°F) - 32) / (9/5) or T(°C) = (T(°F) - 32) / 1.8 Example Convert 68 degrees Fahrenheit to degrees Celsius: T(°C) = (68°F - 32) × 5/9 = 20 °C
Changing the temperature scale
Your Braun ThermoScan is shipped with the
Fahrenheit (°F) temperature scale activated. If you
whish to switch to Celsius (°C) and/or back from
Celsius to Fahrenheit, proceed as follows:
(1) Make sure the thermometer is turned off.
(2) Press and hold down the Start button (IRT 4020)
or the «I/O» button (IRT 4520). After about
3 seconds the display will show this sequence:
«°F» / «SET» / «°C» / «SET» ...
(3) Release the Start button / «I/O» button when the
desired temperature scale is shown. There will be
a short beep to confirm the new setting, then the
thermometer is turned off automatically.
Make sure that the odometer is set to miles and not kilometers. Hold the button down (while in the regular odometer setting, not the "trip odometer" setting) until it changes to miles. The temperature display will automatically change to fahrenheit. We just figured this out today.