An apparatus including a first storage tank, a frame positioned at least partially beneath the first storage tank, a first lever having a first end and a second end, and the first lever is pivotally mounted to the frame; and a first scale system positioned beneath the first storage tank, wherein in a first position, the first storage tank exerts a force against the first scale system, and wherein in a second position, the second end of the lever exerts a force on a bottom surface of the first storage tank such that the first storage tank is positioned above, and out of contact with, the first scale system, when the first storage tank is in the second position.

An air condition service machine for charging an air conditioner with refrigerant in a fast-charge mode, the fast-charge mode controlled based upon the changing weight rate of a refrigerant tank providing the supply of refrigerant to the air conditioner. The embodiment may also include a compensation mode to provide greater accuracy of the charge after completion of the fast-charge mode. The rate of refrigerant flow is monitored and an end time as opposed to weight target ends the charge.

An apparatus including a storage tank, a frame positioned at least partially beneath the storage tank, a lever having a first end and a second end pivotally mounted to the frame, a scale system positioned beneath the storage tank, wherein in a first position, the storage tank exerts a force against the scale system, and in a second position, the second end of the lever exerts a force on a bottom of the storage tank such that the storage tank is positioned above, and out of contact with, the scale system.

Apparatuses, methods, and systems for adjusting scale(s) of a refrigerant recovery system (RRS) are described. The RRS can determine pressure and weight measurements of content within a refrigerant storage tank. The RRS can determine weight measurements of content within oil storage containers. The RRS can compare the pressure and weight measurements to thresholds to determine whether the scale(s) require adjusting, whether the RRS should be locked to prevent further use of the RRS until after servicing of the RRS, or whether additional functions of an operating state of the RRS should be performed. The RRS can comprise a processor to automatically adjust the scales, determine the pressure and weight measurements, and compare pressure and weight measurements to the thresholds. Locking the RRS can prevent the RRS from recovering refrigerant from a cooling system, such as an air conditioning system in a vehicle.

A system and method for retrofitting a refrigeration system containing an HCFC refrigerant and a compatible lubricant, with an HFC refrigerant, comprising providing a transport container containing a mixture of about 5-15% by weight of a miscible lubricant and the HFC refrigerant, removing the HCFC refrigerant from the refrigeration system while maintaining at least a portion of a lubricant immiscible with the HFC refrigerant, and charging the refrigeration system with the mixture.

A measuring apparatus having a housing, at least one internal sensor, an electronic control unit, at least one radio module, an operating device and an information carrier. The measuring apparatus is configured to be connected to external sensors by cable and/or wirelessly, the electronic control unit is configured to convert measurement signals from internal and external sensors into digital measurement data and to provide the digital measurement data to the information carrier. The information carrier is configured to provide and display as priority, in the case of simultaneous availability of wired or wireless sensors, either the data of the wired sensors or the data of the wireless sensors. A system for performing measurement tasks and managing measurement data, and methods for starting up and/or maintaining an air conditioning system are also provided, as well as methods for starting up and/or maintaining a system.

Method for transferring coolant fluid from a loading unit/station to an air conditioning system, via at least one high pressure HP valve and duct, for the introduction of liquid coolant, and at least one low pressure LP valve and duct, for the suction and the recovery of the coolant-vapor in the system. It is provided for executing the step of transferring the fluid also maintaining the low pressure circuit branch open/active, through relative LP valve. Part of the coolant loaded during the transfer step passes through a valve for the expansion of the system and it is suctioned, as vapor, by the station through LP: the net amount that enters into the system is always positive given that there is more loaded coolant with respect to the suctioned coolant.

An air conditioning service system includes a discharge unit including a discharge vessel, a vacuum pump fluidly connected to the discharge vessel, a scale configured to sense a weight of the discharge unit, a first valve arranged in an input line configured to fluidly connect the discharge vessel to an air conditioning system, and a vent valve arranged in a vent line and configured to fluidly connect the discharge vessel to the atmosphere. A controller operates the vacuum pump to evacuate the discharge vessel, obtains an evacuated weight of the discharge unit, operates the first valve to open to fill the discharge vessel with refrigerant, obtains a filled weight of the discharge unit, operates the vent valve to vent refrigerant from the discharge vessel, obtains a vented weight of the discharge unit, and determines a mass of refrigerant vented based upon the stored evacuated, filled, and vented weights.

A method for loading refrigerant fluid in a A/C system from an apparatus for recovering and regenerating refrigerant fluid comprises a step of hydraulically connecting the apparatus with the A/C system by a high pressure duct and a low pressure duct and a step of loading refrigerant fluid present into a storage container of the apparatus into the A/C system. The loading step comprises the steps of setting a value Q of total amount of refrigerant to load, loading in the A/C system an amount of refrigerant in liquid phase equal to Qx, changing value Q with a value Q depending to the loading speed of the refrigerant in the A/C system. Furthermore, there is a step of iterating for a number i of cycles the steps of measuring the amount of refrigerant fluid contained in the storage container obtaining a value T.sub.i of the amount of fluid discharged to the i-th cycle, computing an amount .sub.i=QT.sub.i of refrigerant still to load to the i-th cycle and loading in the A/C system an amount of refrigerant in liquid phase equal to .sub.i/2. The step of iterating ends when .sub.i becomes less than a predetermined value .

An air conditioning service unit and method of using same provide increased accuracy in determining respective amounts of refrigerant and oil recovered during service of an air conditioning system by taking into account the quantity of dissolved refrigerant in oil recovered from the system.