Objective
The objective of this guideline is to set the operational principles of the device that measures the hardness of steel products at the “Central Testing Laboratory for Construction Materials" of "Akkord Industry Construction Investment Corporation" OJSC.

Device data sheet
Name of device: The hardness-measuring device;
Model: DynaROCK II;
Serial Number: DR2-1621;
Manufacturing country: Germany;    
Dimensions: 135 x 79 x 22 mm;
Weight: 425 gr;
Operational time: 16 hours;
Hardness measurement scale:  HRC, HB, HV, HRB, HL, HS;
Display readings: color LCD 320 x 240 pixel.

Operating principle
The DynaROCK II is designed to measure the hardness of steel products according to the Leeb rebound hardness test method for metallic materials.  The dynaROCK II combines an impact-resistant and dust-proof design as well as easy operation with a high precision and reliability.
Hardness scale: HRC, HB, HV, HRB, HL, HS and tensile strength