uTccon: uncertainty contribution due to a possible heat conduction by the instrument under calibration. Tests should be made at different immersion depths.
Example: pulling the instrument 20 mm out of the bath led to a temperature change of 2 mK (which due to the temperature variations of the bath could be estimated only inaccurately).
Two multimeters sre used for data acquisition for reference thermometer and instrument under calibration, so the uncertainty contribution must be accounted for reference thermometer and device under calibration (DUC):
