Final answer:
The stem of a dial thermometer must be inserted at least 2 to 2.5 inches into the center of the food to get an accurate temperature reading, ensuring it does not touch bone, fat, or gristle.
Step-by-step explanation:
To measure food temperature accurately with a dial thermometer, the stem should be inserted at least 2 to 2.5 inches into the center of the food to ensure an accurate reading.
This recommendation is made to ensure the thermometer is measuring the temperature at the thermal center of the food, where it takes the longest to reach the desired temperature.
For larger foods, it's important to make sure that the thermometer is not touching bone, fat, or gristle as this can give a false reading.
When using a dial thermometer, it's also essential to calibrate it regularly to ensure its accuracy, especially after it has been subjected to extreme temperatures or if it has been dropped.
Dial thermometers can be calibrated by using the ice point method, where the stem of the thermometer is submerged in a mixture of water and ice and adjusted to read 32°F (0°C). Moreover, using a thermometer is crucial for food safety, as consuming undercooked food can lead to foodborne illnesses caused by bacteria.