Thanks for feedback.
The book of TT correlate to SilverFast Ai 6 that come on market in 2002, clear.
But TT write on page 77.
"If you have a version without IT8 calibration target and no software for automatic evaluation and for adjustment of scanner, no problem. … You can calibrate it manually. The workflow is given in attachment A from book with help of a 10 step grey scale"
I had contact with LaserSoft and they recommend a upgrade to Ai 8. Clear they will earn money.
After scanning my grey scale I see in SF a histogram with 5 different grey marks from black to white.
I can move the triangles below of the histogram but not in densitometer.
It may be that the version you have, (SE) does not support that function. I had to upgrade to Ai studio to get all the features I wanted. Have you tried the lasersoft forum? You may get more help there.