I use the Minolta dual scan IV for my film scanning. I always use it in manual exposure mode especially if I want to check the exposure on film. In auto mode the scanner software automatically correct for exposure error as well as doing the color balance for the shot. Which is great for quick scan but you would not know if your exposure is right on or not. Using manual exposure setting on my scanner I can easily tell if my film exposure is off and by how much.
Your XE-7 is an automatic camera and it does call for using it in automode and thus the meter must work correctly. I used an SRT-101 for many years (The cameraless years) and didn't use its meter at all and had good exposures most of the time. I started having many bad exposures when I bought a spanking new Nikon F5 in 2002 and tried out it matrix metering system.