Quote:  “Scanning accuracy of arm with provided probe shall be 0,030 mm or more  accurate.”  The definition of the accuracy of arm is not correctly described.  Standard ISO 10360-12:2016 uses for probing accuracy certification of portable  measuring arms. This standard ISO 10360-12:2016 requires certified length and  sphere artefacts be measured multiple times in different positions within the arm  measurement volume with a touch probe. The results of these measurements provide  four accuracy results that together represent the arm’s overall accuracy for contact  measurements. These accuracy results are:  1. The E$_{UNI}$ value is the maximum permissible error for indirectional length  measurements. It therefore most closely reflects most measurements needs.  2. The P$_{SIZE}$ value is the maximum permissible error for measuring the  diameter of a sphere. It therefore signifies the accuracy of feature  measurements.  3. The P$_{FORM}$ value is the maximum permissible error for the form of a sphere.  This value defines the dispersion accuracy of the arm.  4. The L$_{DIA}$ value is the maximum permissible error for the articulation  location. It therefore represents the repeatability of the arm.  Taking into account the above, kindly ask you to revise specification as follows:  “The maximum permissible error of the arm location shall be 0,030 mm or more  accurate”  Publication Ref: EuropeAid/140639/IH/SUP/TR  Subject: Supply of Equipment for Advanced Prototype Station (APS) Sayfa  13  /  23 CLARIFICATION No: 1