Checking the Refrigerant Charge: How to Test a TXV if you suspect it's the Problem!

Checking the Refrigerant Charge: How to Test a TXV if you suspect it's the Problem!
This is Exactly How to Test the Thermostatic Expansion Valve, what to look for before thinking the TXV may be the Culprit. What the Pressures and Temperatures should look like when you are testing the TXV. Does Testing of the TXV hurt the Compressor? What factors to take into consideration when you are not getting the Cooling effect desired in the Building in order to Fix it!