How to Calibrate a Thermometer?

April 2, 2022
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    To ensure your recalibration leads to accurate temperatures, you must first create a proper ice bath. If done carefully, the ice bath should be 30°F (0°C). If you are not careful, the bath can be off by several degrees.


  • Step One: Making a proper ice bath is all about proper ice to water ratio. First fill a clear glass full of ice all the way to the top. Crushed ice is preferred, but cubed will work also.


  • Step Two: Slowly fill the glass with cold water, but stop about inch below the top of the ice. Stir the water and let it sit for 3 minutes to reach its lowest temperature. Watch your glass bottom. If there is no ice on the bottom, but just water, pour out some water and add more ice. Water below ice level will not be 32°F.


  • Step Three: After 3 minutes is up, stir it one more time and insert the thermometer being careful not to let the probe touch the sides or bottom of the glass.

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