What is a Calibration Certificate?

A calibration certificate is a formal document that records the results of the calibration process. It includes details about the DUT, calibration results, uncertainties, traceability information, calibration date, next calibration due date, and technician information. The certificate serves as proof that the instrument has been calibrated according to recognized standards and provides a measure of confidence in the accuracy of the instrument's readings.

The calibration certificate includes:

• Identification Details: Model number, serial number, and manufacturer of the DUT.

• Calibration Results: Recorded readings from both the DUT and the reference thermometer at each calibration point.

• Environmental Conditions: Conditions during calibration, such as temperature and humidity.

• Reference Standards Used: Details about the reference instruments and their calibration status.

• Calibration Method: Description of the method used.

• Uncertainty Analysis: Evaluation of measurement uncertainties.

• Traceability Information: Evidence of traceability to national or international standards.

• Technician Information: Name and credentials of the person who performed the calibration.

• Certificate Number: Unique identifier for the calibration certificate.

What is Traceability in Temperature Calibration?

Traceability in temperature calibration refers to the ability to link the calibration results to national or international standards through an unbroken chain of comparisons. This ensures that the measurements are accurate and reliable. Traceability is achieved by calibrating instruments using reference standards that are themselves calibrated against higher standards maintained by national metrology institutes, such as NIST in the United States.

Traceability provides confidence in the accuracy of temperature measurements and is crucial for regulatory compliance and quality assurance. It ensures that calibration results are recognized and accepted internationally, facilitating global trade and cooperation. Documentation of traceability includes:

• Reference Standards Information: Details about the reference standards used.

• Calibration Certificates: Certificates for the reference standards.

• Chain of Comparisons: Linking the reference standards to primary standards.

This documentation is essential for demonstrating compliance with industry standards and regulatory requirements.