Subject of the paper is to present a purpose-built steam turbine test rig and its prospects for complex analysis of thermodynamic, aerodynamic and mechanical problems. The turbine at a scale of 1:1 was equipped with extensive instrumentation. Pressure and temperature rakes behind the control stage at several circumferential positions, rakes before and behind the HP, IP and LP stages and additional 5-hole probes to measure the complete flow field. Also tip timing measurement of the last LP stages were carried out to analyze their mechanic behavior in critical operating points, for example extreme part load or high condenser pressure. The turbine and its equipment are discussed, different operating points are analyzed and some comparisons of measurement results and numeric calculations are presented. The measurements create an additional database for future design optimizations. NOMENCLATURESUBSCRIPTS h height dimensionless ave averaged p pressure m mean r radius stat static t time tot total T Temperature