- In the context of digitalisation, digital calibration certificates are key to provide a fully machine-readable exchange format for metrological traceability of measurements. The most significant challenge is to establish a unique and harmonized DCC scheme, especially within the communities of specific measurement quantities. Here, we focus on the key aspect of refTypes within DCCs, and present recommendations and good practices developed by the DCC working group from the technical committee for temperature and humidity quantities within the German Calibration Service (DKD). Storage of process and quantity information relies on so called refTypeattributes which associate specific meanings to particular information in the DCC architecture. The meanings of some distinguished quantity-specific refTypes are described in this work. For various information that are specific to calibration certificates for temperature and humidity quantities, dedicated good practice implementations in XML areIn the context of digitalisation, digital calibration certificates are key to provide a fully machine-readable exchange format for metrological traceability of measurements. The most significant challenge is to establish a unique and harmonized DCC scheme, especially within the communities of specific measurement quantities. Here, we focus on the key aspect of refTypes within DCCs, and present recommendations and good practices developed by the DCC working group from the technical committee for temperature and humidity quantities within the German Calibration Service (DKD). Storage of process and quantity information relies on so called refTypeattributes which associate specific meanings to particular information in the DCC architecture. The meanings of some distinguished quantity-specific refTypes are described in this work. For various information that are specific to calibration certificates for temperature and humidity quantities, dedicated good practice implementations in XML are provided, e.g. self-heating, hysteresis as well as the calibration medium and the temperature scale used. Furthermore, the statement of the ambient conditions, that are included in almost any DCC is presented on the example of the ambient temperature.
These digitization efforts will allow to automate quality management and metrological traceability in laboratories and industrial measurement technology.…

