I have nothing to add to the method described, but I own the same meter, and there are a couple other things to know.
If you look at the trigger, you'll see a small screw that you can use to adjust the meter's overall sensitivity. If you have a 35mm camera with a spot meter you trust, you can use it as your baseline. Otherwise you can set up a grey card in daylight, and adjust it to zone V.
Also, and this is just for information only, under the metal Soligor label on the side of the meter, there are three (I believe) pot screws that are used to adjust the sensitivity of the meter at different frequencies. This is especially helpful if you are at extreme altitudes with an abundance of blue light. I wouldn't recommend screwing with them, but it's something to know.