Before you do anything, always make sure you connect your cable to the expression pedal first and then you connect the pedal to the EXP input of the H90 last. Doing things in the wrong order won’t allow any pedal to sense the proper load. To calibrate, go in the Systems settings > I/O > third page, you can use the third quick knob to enter the calibration sequence. Make sure as you sweep the pedal from heal to toe that it goes from zero to 100 and back.
