Block diameter: 25mm
Block thickness: 6mm
Available hardness values: 150 / 200 / 250 / 300 / 350 / 400 / 450 / 500 / 550 / 600 / 650 / 700 / 750 / 800
Calibration details: The hardness reference block will be examined in the UPI Laboratories calibration laboratory and will be found to comply with the requirements of ISO 6507-3 and ASTM E92. The hardness reference block value will be calibrated on a standardizing machine complying with the requirements of ISO 6507-3 and ASTM E92 having hardness scales traceable to the 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 will only be valid for the scale for which 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 should be reduced to 2 to 3 years.
Uncertainty: The reported expanded uncertainty will be based on a standard uncertainty multiplied by a coverage factor k=2, providing a level of confidence of approximately 95%. The uncertainty evaluation will be carried out in accordance with International requirements.
Traceability: All measurements involved will be traceable to international applicable standards.