Correct Way Refill Refrigerator Freon by Our Version

just for reference
important point
fill with correct type refrigerant and amount, use high precision scales
compressor current not exceed it maximum rating
evaporator temperature minimal is -15 degree C (if using R134A) at thermostat sensor
what about low pressure? that not really important, but make sure not exceed 25psi after 1 hour running
make sure no condensing at suction pipe, just cool not until condensing