- Most thermometers have two temperature scales: Fahrenheit and Celsius.
- When you read the temperature on a thermometer, it should be vertical and your eyes should be level with the top of the liquid in the glass tube.
- Avoid handling the thermometer when you take your readings.
Moreover, how long should you hold a thermometer under your arm?
Keep the thermometer in the rectum for 3 minutes. To take an underarm temperature: Put the end with the colored tip in your armpit. Squeeze your arm against your body to hold the thermometer in place. Keep the thermometer in your armpit for 3 minutes.
How do you use a thermometer?
With your mouth open, put the end with the red, blue, or silver-colored tip under your tongue. Close your lips gently around the thermometer. Do not bite the glass thermometer. Keep the thermometer under your tongue for 3 minutes.
How do you check a thermometer?
To calibrate using ice water, place the thermometer stem in a bowl or glass of ice water, careful that the sensor (the tiny dimple along the side) is completely submerged. Let it sit for a few minutes, then read the dial. It should register about 32 degrees.