... closed-loop force sensor control system 10 class Test force selection, 14 class test scale robust construction, good rigidity, accurate, ... suitable for parallel flat precision measurement3. Main accessories Big flat test bench: 1 setSmall flat test bench: 1 setV-shaped test bench: 1 setSteel ... microscope: 1 set4. technical data Measuring range: 4-650HBW Test force: 612.9, 980.7, 1225.9, 1838.8 ...