Why must the refractometer be calibrated?

Calibrating a refractometer is crucial for ensuring precise readings of deicing fluid concentration. This tool measures the refractive index of a liquid, which can change based on the concentration of the solute—in this case, deicing fluid. Accurate measurement is essential because the effectiveness of deicing agents often depends on their concentration; too much or too little can lead to inefficient deicing or potential damage.

Correct calibration means that the refractometer will provide reliable measurements that adhere to the required specifications for safety and performance on an aircraft. This not only helps maintain safety standards but also supports adherence to regulatory requirements for aircraft deicing processes. Therefore, maintaining a well-calibrated refractometer directly impacts both operational efficiency and safety in winter weather operations.