How often should food thermometers be calibrated for accuracy?

Calibrating food thermometers before each use ensures that they provide accurate readings, which is crucial for food safety. Temperature is a critical factor in preventing foodborne illnesses, and inaccurate thermometers can lead to undercooked or improperly stored food. This calibration process helps confirm that the thermometer is functioning correctly and can give precise temperature readings, making it essential every time the thermometer is used.

The other options suggest less frequent calibration, which could compromise food safety standards. For instance, calibrating once a year or only when the thermometer is broken may lead to relying on outdated or faulty measurements for long periods. Similarly, limiting calibration to summer months would ignore the potential for inaccuracies at other times of the year, during which temperature-sensitive food handling occurs. Regular calibration before each use addresses these concerns effectively.