Well, this issue solved inexpectedly: actually, with installed usb driver there are comes a dll, using which one can access adcmt equipment. But there are no almost any function documentation, except C header and simple C program. I also tried to write my own to test this dll, and it seems that using it easier than I expected. To user, dll provide a simple text in - text out interface, carring out a lot of usb api related things, one do not need even to know vid/pid, only ID, that can be set in dmm menu. Also, it seems, dll (and driver) is common to a set of ADCMT instruments.
So, now one already in great anticipation to use all of those SCPI program to setup and read data?
Hahahaha, no.
Yes, it's no.
Here was the trap: when configured as usb interface, dmm will use ADC programming language, not SCPI. Only with GPIB one can select between SCPI and ADC.
Seriously, ADCMT, why spend a lot of effort to another laguage? Even in ADC mode, there some SCPI commands, like *idn?
Anyway, somewhere in the internet I found quote from manual with all commands, so if one interested in automated measurements, its not that hard.
Also, in attachment, a reply to *idn? and unit for lazarus gui program. If anyone interest, I'll beautify and trow entire project to some github.