Many factors determine recertification of thermometers, such as usage, temperatures measured, in-house procedures, and regulatory agencies' guidelines and policies. As a general guideline for good laboratory and manufacturing practices, thermometers should be recertified / verified on an annual basis.
Calibration Point
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5 to 9
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- Complete visual inspection for any physical damage
- If possible the damage will be repaired
- Thermometer readings are compared against NIST standards in high precision calibration baths using the comparison method at determined test temperatures
- Each temperature is recorded to 1/10th of a scale division
- A calibration report is generated detailing the pertinent information including the correction factors for each test point
- All calibration information is entered into the THERMCO data storage system
- All certification procedures are performed in accordance with NIST and ASTM guidelines, which meet with requirements set by regulatory agencies