How to apply a correction to a Calibrated Thermometer.

Positive correction must be added to the instrument reading to obtain the true test temperature.

Negative correction must be subtracted from the instrument reading to obtain the true test temperature.

Did you know?
The degree centigrade (C) was officially renamed Celsius in 1948 to avoid confusion with the angular measure known as the centigrade (one hundredth of a grade). The Celsius scale is named after the Swedish astronomer Anders Celsius (17011744), who devised it in 1742 but in reverse (freezing point was 100; boiling point 0).
 

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