Starrett SR400 Surface Roughness Tester - Manual (Page 36)

SR300 and SR400 Surface Roughness Tester
Dimensions
Measurement Capability SR300 SR400
Gage Range 200µm, 100µm, 10µm 400µm, 100µm, 10µm
Resolution 100nm, 20nm, 10nm 50nm, 10nm, 5nm
Noise Floor (Ra) 250nm, 150nm, 100nm 150nm, 100nm, 50nm
Repeatability (Ra) 1% of value + noise 0.5% of value + noise
Pickup Type Inductive
Gage Force 150 – 300mg
Stylus Tip Radius 5µm (200µin default/2µm (80µm) or 10µm (400µm) optional
Measurement Type Skidded
Calibration Process Automated software calibration routine
Standards Able to calibrate to ISO 4287 roughness standards
Analysis Filter Cut-Off 0.25mm/0.8mm/2.5mm
Filter Type 2CR/Gaussian
Evaluation Length 0.25mm – 12.5mm (0.01in - 0.49in) 0.25mm – 25.0mm (0.01in – 0.98in)
Max X Axis Range 17.5mm 25.5mm
Speed Measuring Speed 1mm/sec (0.04in/sec)
Returning Speed 1.5mm/sec (0.06in/sec)