Test angles to length 1500 mm and more we calibrate either with the SQUARE-master method (up to 1000 mm) or on our special squareness measuring station with the specially developed measurement method STRAIGHT-line. In both cases we have absolute accuracy.
Important: Especially with test angles it is crucial that they get checked with a method that is applying the best. We therefore make the measurements for our calibrations with measuring probes.
Our best measurement uncertainty for squareness (SQUARE-master method):
± 0.20 µm + (0.20 × 10-6 L) + (0.02 x A)