To ensure the turkey has cooked to proper temperature, place the pop-up timer for a turkey in the inner-most part of the thigh. The United States Department of Agriculture also recommends checking the thickest part of the breast.
Only use the pop-up timer as a guide; do not rely on it as the sole method for determining if the turkey is done. To ensure that the turkey is safe to eat, use a probe thermometer to verify the exact temperature. The minimum internal temperature for safe consumption of poultry is 165 degrees Fahrenheit. If the turkey is stuffed, the stuffing must also reach 165 degrees Fahrenheit before eating.