How often should the built-in thermometer accuracy be checked with a calibrated thermometer?

• A. Weekly
• B. Monthly
• C. Quarterly
• D. Annually

Answer: (B)

Regular accuracy verification relies on comparing the device’s built-in thermometer to a calibrated standard to catch any drift over time. Doing this on a monthly basis is common because sensor drift in electronic temperature readers tends to happen slowly, so monthly checks balance catching changes early with not overburdening staff. If the readings differ beyond your facility’s tolerance, calibration or service is needed to restore accuracy and maintain reliable temperature monitoring.

To perform the check, place the calibrated thermometer and the built-in thermometer in the same stable environment, compare their readings at a representative temperature, and record the difference. If the discrepancy exceeds the allowed tolerance, arrange calibration or repair. In some high-precision or critical settings, more frequent checks might be used, but monthly is the typical standard.