Example of DKD certificate for Particle Standard Target

043-102302-73

Content

04/2017 - Specifications are subject to change without prior notice.

DKD certificate for Particle Standard Target

• Calibration objects

• Calibration method

• Measuring conditions

• Environmental conditions

• Measurement uncertainty

• Measurement results

Remark: Additional calibration (of one particle in the inner circle) measurement is not included in the accreditation scope.

Excerpt

... Measuring Conditions:

... All measurements refer to the scale line “1“. The 0.01 mm intervals were measured from scale line “1“ to the left, the 0.1 mm intervals from scale line “1“ to “2“ and the 1 mm intervals from scale line “1 “to “10“. The captured line length was 0.2 mm. The measuring line runs through the middle of the shortest lines for the 0.01 mm graduation and 0.4 mm above the lower ends of scale lines for the 0.1 mm graduation. ...

... Calibration Method: The distances of the line centers were measured by the automatic fringe-counting interferometer Lambda-Mess 600, Ident. -No. 2309170008000. The traceability of the used interferometer to the unit of length was ensured

by using a frequency-stabilized He-Ne-laser as a reference standard, whose wavelength was compared with those of a He-Ne-laser stabilized for iodine absorption lines, Type Lasertex LJSC-3,3, Ident. -No. 2309120005007. calibrated by the PTB (German Federal Institute of Physics and Technology) with official registration number 5206 PTB 08. PTB 08. ....

... Measurement Uncertainty: The measurement uncertainty is:

U = 0.2 µm.

The measurement uncertainty was determined according to DAkkS-DKD-3. ...