Hello,
I am glad it helped. Actually I needed it also for myself, and I probably know how to calibrate now. Spent one hour in darkroom last weekend.
My sequence is:
1. Choose what do you want to calibrate for (highlights or darks or gray...whatever). I choose white, specifically 'almost white'.
2. Make a good print containing that tone. Note the exposure time
3. Turn on enlarger
4. Put probe on that detail containg the tone
5. Set 'M' on switch near main dial, probe should be measuring now. If you move it, numbers are changing
6. When on proper place, rotate the index dial until measured number is equal to your exposure time for print
7. Press and hold one number under the index dial (i or index i do not have it right now here), you see the index for your paper. Note this number.
It should be like this, sorry i am writing it from memory. Maybe some small mistake.
But for my printing I have index 2.7 for ilford mg IV rc deluxe, for white point.
When i change gradation, it works nicely... i leave the probe on the same place and just watch how time slightly changes.
Good luck!