Block diameter: 65mm
Block thickness: 12mm
Available hardness values: 60 / 80 / 100 / 150 / 200
Calibration details: The hardness reference block has been examined in the UPI calibration laboratory and was found to comply with the requirements of ISO 6506-3 and ASTM E10. The hardness reference block value was calibrated on a standardizing machine complying with the requirements of ISO 6506-3 and ASTM E10 having hardness scales traceable to the National Scales as defined by Physikalisch-Technische Bundesanstalt National Metrology Institute, Braunschweig, Germany.
Calibration temp.: (23 ± 2) °C
Relative humidity: < 70 %rh
Validity: This hardness reference block is only valid for the scale for wich it was calibrated. It is recommended that the duration of the calibration validity should be limited to 5 years. Attention is drawn to the fact that, for Al-alloys and Cu-alloy, the calibration validity could be reduced to 2 to 3 years.
Uncertainty: The reported expanded uncertainty is based on the standard uncertainty of the measurement multiplied by a coverage factor k, such that the coverage propability corresponds to approximately 95%. The standard uncertainty has been determined in accordance with EA 04/2.
Traceability: All measurements involved are traceable to international applicable standards.