purchasing bluelab truncheon which ppm scale to use with flora nova products

im new to all of this and have been doing a lot of reading but this is very confusing to me. i purchased a truncheon and am using flora nova nutes.can somebody please tell me which part i need to be looking at. thanks in advance.

You can use any one you want.
I prefer EC. Some use ppm. I dont usually see people talking about CF, but you can use it if it floats your boat.
They're all the same reading, just in different scales.

Bluelabs are really nice.GOOD PURCHASE BRO.