When using Two Phase angle volt meters with the same reference sync frequency but the Reference voltage is different

Example

Phase angle volt meter#1 Reference at 60hz at 120Volts
Phase angle volt meter#2 Reference at 60hz at 26volts

What does having a different voltage on the REFERENCE input do?

The Reference sync/frequency is the same only the voltage is different

 

Does it give a different reading?

 

Not that I know of, it seems to be the same

But maybe it does for some reason, but i'm not sure what the reason is

Why would having a different voltage on the reference inputs make a difference in the measurement?

 

I suspect the reference input is for phase only, the voltage just has to be in an acceptable range for the phase detection circuitry to be accurate.

 

the voltage just has to be in an acceptable range for the phase detection circuitry to be accurate.

Yes but one PAVM says to be at 120VAC at 60hz and the other PAVM says to be at 26 VAC at 60hz

What is the difference between 120VAC VS 26 VAC when using the Reference input on a PAVM?

It will do what different?

 

The difference is - 94VAC