Hi everyone, I have a question about my reference thermometer calibration frequency. last year I purchased a certified NIST thermometer to be used as a reference to verify the thermometers used in the production floor. The certificate of calibration has an issue date but not an expiration date. How often should I send it out for recalibration or get a new one? I called Thermoworks and they told me they don't give an expiration date, just issue date
Edited by Jacob Timperley, 28 July 2021 - 11:39 PM.