To calibrate an infrared thermometer, you typically compare its readings against a trusted reference thermometer at specific, known temperatures and then adjust the infrared device's settings to match.
The Basic Calibration Method
Based on standard practices, including information from reliable sources, the fundamental process involves testing your infrared thermometer's accuracy at key temperature benchmarks. The core idea is to identify any discrepancy between your infrared thermometer's reading and the true, known temperature value, as measured by a calibrated reference thermometer.
According to guidance on this topic, to calibrate an infrared thermometer, you need to compare its readings to a reference thermometer at two known temperature points: 0°C/32°F for ice water and 100°C/212°F for boiling water.
This two-point comparison allows you to check the thermometer's accuracy across a range rather than just a single point.
Required Temperature Points
For a foundational calibration check, two critical temperature points are used:
- 0°C (32°F): The freezing point of water. This is typically achieved using an accurately prepared ice water bath.
- 100°C (212°F): The boiling point of water at standard atmospheric pressure. This is achieved using boiling water.
Using a reliable reference thermometer (like a calibrated digital probe thermometer) to measure the temperature of these baths ensures you have accurate comparison points.
Adjusting Your Thermometer
After comparing the infrared thermometer's readings at these two points to your reference thermometer's readings, the next step is to address any differences. The process then involves adjusting the calibration settings of the infrared thermometer to align with the reference temperatures. The specific steps for adjustment vary significantly depending on the make and model of the infrared thermometer; consult your device's manual for detailed instructions on how to access and modify its calibration parameters.
