I am guessing here, cause I have never attempted this sort of test. It is easier to just search the net and find out the dynamic range of a given camera brand/model sensor.
So what I am guessing is the point of this test is you start with your 18% grey card and take photos based on your settings that you have from the course. You then need to move up and down from that point, 1
stop at a time, till the grey card appears either pure black or pure white, then from those two points you can ascertain the dynamic range of your camera based on how many
stops there are between the white one and the black one. You will also need to perform this under a constant
light source. So for example, doing it outside will not work cause the
light can change as clouds move over the sun etc.