Roughness standards

Calibration of roughness standard

Measurement range

Accredited measurement range:

Type A (Rd): 0.25 µm – 10 µm

Type C (Ra, Rq): 0.2 µm – 10 µm

Type C (Rz, Rt): 1.5 µm – 100 µm

Type C (Rsm): 10 µm – 250 µm

Type D (Ra, Rq): 0.2 µm – 2 µm

Type D (Rz, Rt): 1.5 µm – 10 µm

If you want calibration outside these areas, contact us for more information.



Accredited calibrations and tests are performed under DANAK accreditation reg. No. 255 and our ISO 9001 certified quality system.

Calibration of roughness standards

DFM offers accredited calibration of roughness standards with traceability to international standards. DFM can calibrate all 4 types of roughness standards used in calibrating roughness meters. The different types of roughness standards are described in DS/ISO 5436-1:

  • Type A is used to control the vertical magnification of profile recording instruments with vertical measuring probes
  • Type B is primarily used for checking the condition of the key tip
  • Type C is primarily used for the control of parameter recording touch-sensitive instruments
  • Type D is used for the overall control of the instrument calibration

Accredited calibration of the following roughness standards:

  • ISO type A1: Wide grooves with flat bottom (2 grooves)
  • ISO type A2: Wide grooves with rounded bottom (6 grooves)
  • ISO type B2: Grooves with simple shape
  • ISO type C1: Grooves with sine wave shape
  • ISO type C2: Grooves with equilateral triangular profile
  • ISO type C3: Simulated sine wave grooves
  • ISO type C4: Grooves with circular curved bottom
  • ISO type D: Profiles with irregular shape in one direction


Contact person

Cristian A. Davidsen

Calibration Technician, Nano
+45 2545 9053


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