NDT HT225A CONCRETE TEST HAMMER

HT-225A is a compact Concrete Testing Hammer ( Schmidt Type) , commonly used for testing of strength and hardness of various types of concrete materials. When testing the strength of concrete, the concrete test hammer uses a certain elastic force to transit the impact force of an impact hammer to the surface of concrete, its initial kinetic energy redistributes, a part of energy in the form of plastic deformation or residual deformation is adsorbed by the concrete, and another part of energy which is proportional to the surface hardness is transmitted to the impact hammer, making the hammer resilie to a certain height, then the strength of the concrete is derived from the proportional relation between the height of resilience and the concrete strength. SPECIFICATION: Model: HT-225A Nominal kinetic impact energy: 2.207J ( 0.225 kgf.m) Flip tension spring rigidity: 7.84N ( 0.80 kgf) / cm Punch advance for impact hammer: 75 mm Impact surface hardness value between impact hammer and rod: HRC59-63 Maximum breakout friction of pointer system: 0.49-0.78N( 50-80g) Mean-value of steel-anvil rating of concrete test hammer: 80+ / -2 Standards: ISO/ DIS 8045, EN 12504-2, ENV 206, DIN 1048 part 2, ASTM C 805, ASTM D 5873, NFP 18-417, B 15-225, JGJ/ T 23-2001, JJG 817-1993 Dimension: 60 mm x 280 mm Net weight ( Hammer Only) : 1.5 kg SUPPLIED WITH: Main unit HT225A User manual Test Calibraton certificate Grinding wheel block Protective carrying case