Some MFTs have PSC/PFC test combined, I wonder why others have it as a separate test

[mak]

For example kt63 calculates pfc/psc with Zs but it has no option to go for an L-N test. The calculation is also the same V/Zs or V/Ze. The kt63 plus on the other hand has this option.

 

[davesparks]

That's nice I was just wondering why is there an option L-PE or L-N if you can stay in L-PE mode to test L-N

Because adding lots of features and options allows manufacturers to charge more money.