There is a control valve in the hydraulic system which is used for controlling the test force. When the test force comes to 750kg, the control valve will immediately turn on and off, with the force falling down. According to the ASTM E110 and GB/T 4285, keep loading test force to make indicator hand points at 750kg for 3 to 4 times. It is an accurate and high qualified portable hardness tester for metal, and is equivalent to the regulation of Brinell hardness testing approach to hold test force for 10 to 15 seconds.
Test force: 750kg
Test ball: 5mm hard alloy ball
Test range: 100~650HBW
Indication error: comply with ISO 6506, and ASTM E10.
Repeatability error: comply with ISO 6506, and ASTM E10.
Test force error: comply with ISO 6506, and ASTM E10.
Weight: 15.8kg
Surface:
Flat: area≥290mm×90mm