The time interval between two successive calibration steps should, if possible, be similar.
Recording the measured value may take place only after the indication has stabilised.
Indication drift due to creep requires that the time sequence be maintained.Calibration should be carried out at a temperature stable to ±1°C. This temperature should
be in the range between 18°C and 28°C (preferably between 20°C and 22°C) and
recorded.