Question: How can I measure power with a 190 Scopemeter ?

Answer:

A scopemeter has the ability to measure some basic power parameters like Power Factor,  Power in Watts, VA or VAr. 

In order to measure power you also need a current-probe, for instance a Fluke-i310s

How do you setup the connections :  
Connect the scope input A to the line-voltage with one of the 10:1 probes. 
Configure input A to match the correct probe settings. 
Adjust the range so you see the full waveform in screen : 

Then on the B-input connect the i310s and configure input B (see F3 key labelled Probe B) , select current and the appropriate mV/A setting that matches the selection on the i310s (10 mv/A or 1 mV/A). 
And also like with channel A adjust the range to see the full waveform in screen. 
You now have two waveforms in screen. 

Then go to Scope menu to select the readings you would like to see. 

Select the number of readings you whish to see, you can have a maximum of 4 readings in screen. 

Select with the key buttons a parameter you whish to be displayed on screen.
Selecting power from this list guides you to a submenu to choose from Power Factor, Watts, VA and VA Reactive.
Check if you see the parameter being displayed in the top of the screen. 
 

In this way you can configure up to 4 different parameters to be shown in screen.