We present the first results of the site testing performed at Mt .
Shatdzhatmaz at Northern Caucasus , where the new Sternberg astronomical institute 2.5-m telescope will be installed .
An automatic site monitor instrumentation and functionality are described together with the methods of measurement of the basic astroclimate and weather parameters .
The clear night sky time derived on the basis of 2006 – 2009 data amounts to 1340 hours per year .

Principle attention is given to the measurement of the optical turbulence altitude distribution which is the most important characteristic affecting optical telescopes performance .
For the period from November 2007 to October 2009 more than 85 000 turbulence profiles were collected using the combined MASS/DIMM instrument .
The statistical properties of turbulent atmosphere above the summit are derived and the median values for seeing \beta _ { 0 } = 0.93 arcsec and free-atmosphere seeing \beta _ { free } = 0.51 arcsec are determined .
Together with the estimations of isoplanatic angle \theta _ { 0 } = 2.07 arcsec and time constant \tau _ { 0 } = 2.58 \mbox { ms } , these are the first representative results obtained for Russian sites which are necessary for development of modern astronomical observation techniques like adaptive optics .