A method of operating a refrigerant service system to charge an air conditioning circuit includes pre-charging a predetermined pre-charge quantity of refrigerant into the air conditioning circuit, determining an average temperature in the air conditioning circuit based upon a pressure in the air conditioning circuit after pre-charging the air conditioning circuit, determining a charge compensation value based upon the determined average temperature in the air conditioning circuit, and charging the air conditioning circuit with a quantity of refrigerant based upon the charge compensation value.

Method of determining the presence of incondensable gases in a climate station cylinder for recharging motor vehicle air conditioning systems. One of the pressure sensors will be used that is present in the charging station and designed for monitoring the operations in the A/C system of the vehicle, placed on the low pressure LP and/or high pressure HP lines of the climate station, so that in case of verification of the incondensable gases, the control electronics opens a coolant charging valve and an HP/LP separating valve, thereby flooding the service pipes so as to receive the pressure signal from one of the service pressure sensors, LP or HP, of the station, and compare the value with the temperature T of the cylinder and check whether such pair of values is a corresponding parameter, without tolerances, of a pressure-temperature curve of the pure coolant.

An air conditioning service system includes an oil receptacle, a coupling port in fluid communication with the oil receptacle through an oil injection line, a solenoid valve configured to selectively allow the oil to flow from the oil receptacle into the oil injection line, a memory including program instructions stored therein, and a controller operably connected to the solenoid valve and the memory. The controller is configured to execute the program instructions to obtain at least one viscosity signal associated with a viscosity of the oil, obtain a volume signal indicative of an amount of oil to be charged, determine a time period based upon the obtained at least one viscosity signal and the obtained volume signal, control the solenoid valve to an open condition, and control the solenoid valve to a closed condition after the determined time period has passed since opening of the solenoid valve.

A refrigerant-cylinder leveling platform device is provided, configured to stabilize air conditioning refrigerant cylinders during HVAC servicing operations conducted on non-level surfaces. The device comprises a body with a flat upper surface for supporting the cylinder. A plurality of telescopic legs may be connected to the underside of a frame of the body, each comprising an independently operable locking mechanism to allow height adjustment. Each leg terminates in a foot designed to maintain contact with various ground types, with optional pivot joints to self-adjust based on terrain angle. The legs are attached to the frame via hinges that allow inward or outward rotation, with locking mechanisms to secure their angular positions. One or more integrated leveling instruments are provided on the platform to indicate when the surface is horizontally aligned.