Beijing TIME 5100 - 2.2 Working principle; 3 Specialties; 3.1 Specifications

7
2.2 Working principle
The basic principle is: The impact object of certain weight pounds at the testing surface under certain test force.
Measure the impacting velocity and the rebounding velocity of the impact object respectively when it is 1mm
above the testing surface. The calculation formula is as followed:
HL=1000×VB/ VA
Where, HL--Leeb hardness value
VB-- Rebounding velocity of the impact object
VA --Impacting velocity of the impact object
3 Specialties
3.1 Specifications
3.1.1Impact Device：D；
3.1.2 Features of Impact Device and testing demand see table 3，indentation dimension of test tip see table 4；