How does the type of refrigerant affect the charge verification process?

The type of refrigerant used in an HVAC system affects the charge verification process due to its unique properties, such as boiling point, pressure, and density. For example, R-410A has a higher pressure than R-22, requiring different charging procedures and equipment. Refrigerants with lower boiling points, like R-134a, may require more precise temperature control during charging. Understanding the properties of the refrigerant being used is crucial for selecting the appropriate charge verification method and ensuring accurate results.