What is a simple method to verify the ambient reference temperature for an infrared camera?

• A. Crushed ice and water
• B. Boiling water
• C. Ice alone
• D. Room temperature water

Answer: (A)

Using a stable, known reference temperature is the key idea. A mixture of crushed ice and water sits at about 0°C and stays there as long as ice remains, providing a reliable, fixed ambient temperature for checking the camera’s ambient reference reading. This makes it a quick, repeatable way to verify that the camera’s non-contact measurements are properly calibrated to a known temperature point. Boiling water is too hot and fluctuates; ice alone can drift as it melts; room temperature water isn’t a fixed reference. So crushed ice and water is the best simple method.