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a starved evaporator.
Overcharged system
superheat is above standard conditions
8.2
add
under charge
10 degrees
About 10 degrees
So you can get a correct reading
10
Suction superheat is the heat added to the refrigerant above that required to change its state from liquid to vapour (as happens in the evaporator). This heat is added both in the evaporator, in the suction line and (where applicable) in the suction accumulator.Discharge superheat is suction superheat plus heat of compression, and must be removed in the condenser before condensation, the change of state from vapour to liquid, can occur.The HVAC Veteran
air flow and liquid change of state