If you have an infrared thermometer, you have the potential to be able to measure temperature with far greater accuracy than many other types of thermometers. However, this potential will be squandered if you don't actually calibrate the thermometer. You might be at a loss as to how to perform this task. If you follow these steps, you will be able to calibrate your infrared thermometer as easily as possible.

1. Fill a Glass With Ice

First, take a glass that is large enough to hold your infrared thermometer and fill it to slightly below its brink with ice. For added efficiency with regards to cooling, you will want to use crushed ice in order to make sure that the cold source is applied more evenly to the thermometer itself. You don't want to fill the glass all the way to the brim with ice because you are going to be adding other items and you don't want it to overflow. If you don't have crushed ice, normal ice will work fine. 

2. Add Ice Water

Next, take ice water or very cold water and start filling the glass with it. You want to stop adding water when the level of the water is slightly below the top of the ice. If you notice that any ice cubes are floating off the bottom of the glass, then there is a good chance that the water is too high above freezing for the calibration to work. You will need to wait until the water is chilled and the ice cubes float back down or start over and use colder water.

3. Set Your Thermometer's Emissivity to Close to One

Take your infrared thermometer and set its emissivity to slightly below 1.0.

4. Situate Your Thermometer

Situate your thermometer so that the opening or the lens is directly perpendicular to the glass of ice water.

5. Take the Measurement

At this point, the water in your glass should be approximately freezing or slightly below freezing. This is what you want to use to set the baseline for your thermometer. Make sure that the entire glass is within the field of vision of your infrared thermometer's lens. Take the reading. If you have done this correctly, the reading that you should have taken should either be 0 degrees Celsius or 32 degrees Fahrenheit. 

For more information or for assistance, talk to a company that specializes in infrared testing. They will be able to help you calibrate your thermometer. Contact a company like Centerline Electric for more information.