For thin foods, the bimetal thermometer may be inserted sideways so that it will average the temperature in the center of the food. Combination Dishes For casseroles and other combination dishes, place the thermometer into the thickest portion of the food or the center of the dish. Egg dishes, and dishes made using ground meat and poultry, should be checked in several places. Calibrating a Thermometer There are two ways to check the accuracy of a food thermometer. One method uses ice water, the other uses boiling water.
Many thermometers have a calibration nut under the dial that can be adjusted.
Check the package for instructions. Calibrating a Thermometer There are two ways to check the accuracy of a food thermometer. One method uses ice water, the other uses boiling water. Many thermometers have a calibration nut under the dial that can be adjusted. Check the package for instructions.