Fixed point calibration involves the following steps:
Selection of Fixed Points: Choose fixed points relevant to the operational range of the measurement instrument, such as the triple point of water (0.01°C) or the boiling point of water (100°C at 1 atm). Stabilization: Ensure the substance is in a stable state at the fixed point. For instance, when calibrating at the melting point of ice, ensure the ice-water mixture is at equilibrium. Comparison: Compare the instrument's readings against the known value of the fixed point. Adjust the instrument as necessary to match the fixed point value. Documentation: Record the calibration data for future reference and traceability.
