... roughness measurement, the instrument can part plane, axial surface roughness test bus. This instrument uses contactless manner, quickly and intuitively accurate ... , to avoid human errors. Standard:According to GB1031-83 and ISO, DIN and other standards designed to achieve the same level ... HZ-3503DAssessment parameters: Ra.Rt.Ry.Rmax, Rz (DIN), Rzu (ISO), R3z, Rp, S, Sm, tpMeasuring range: Ra :0.01-10 ...