Product Specification

Surface LCD Mechatronics Digital Hardness Tester Rockwell Mitech MHRS-45A

Technical Parameters

Indication Error

Working principle
The surface rock hardness test based on the cone diameter of a cone or low-end diamond ball pushes the hardness of the sample surface. In the test, the initial police test is loaded first and the main test is loaded. After pressing the sample test surface, the main test needs to be removed according to the bending depth of the test test while maintaining the initial test test and determining the value of the surface rock hardness of the metal material you can measure.
As shown in the figure below, 0 - 0 is the situation where the diamond indenter has not yet contacted the sample. The first test test in the 1-1 indent situation is to press the depth of h1, the first test is to eliminate the surface of the sample. This is not clean, caused by the accuracy of the results of the tests. In the figure, 2-2 is the indenter situation under the total test (the test test and the main test), the depth of indentation is h2.3-3, and the indenter after removing main test force As the position of metal elastic decay produces a specific recovery, the actual pressure h3 in depth h3. The main test that causes indent plastic disagreement at h depth is h3 - h1. The value of Rockwell's hardness is determined by the size of h, and the hardness is lower because the depth is larger. On the other hand, the hardness is increasing. Press the Rockwell Surface Hardship Unit 0.001 mm. The hardness value obtained in the surface rockwell hardness value identified by the HRN symbol (T) is called.

Features

• Widely used for surface Rockwell hardness test with a variety of metal and non-metallic materials;
• Adopt large-screen LCD and LED digital dual-screen display, easy to operate, and it can visually display the test results and the measurement parameters;
• With fast test speed, small indentation of the workpiece after testing, it is the high-tech products of the mechanical and electrical integration ;
• Support the conversion among various hardness scales such as Brinell, Vickers and etc;
• Option for various specifications of the indenter, support many types of Rockwell hardness scales testing ;
• Equipped with high-speed thermal printer, quickly print out the test data;
• Diamond indenter, durable wear and accurate measurement;
• Using grating displacement sensor, and the measurement error is small;
• Consistent with EN-ISO-6508,GB/T230.1,GB/T230.2,JJG112,ASTM E18 and other relevant standards at home and abroad.

• During testing, to ensure accuracy, please make sure the distance between the adjacent indentation center and the distance from the indentation center to edge of the specimen is greater than 3mm;
• Normally, the first point is only used to offset the gap of each support surface without needing to record the test result. Record the statistical test result from the second point;
• It is strictly prohibited to turn the variable loading handwheel when the instrument load or unload the test force. Rotating the handwheel forcibly will cause the internal gear dislocation, test force in chaos and even damage the internal parts of the instrument;
• If the specimen has visible deformation marks on the back and edges, the test result would be useless. It should choose the intender or test force to test again;
• The test personnel should follow the operating procedures.Before and after the test,it should be repeated with standard block calibration equipment;
• Pay attention to palm the instrument for carrying to forbid falling across. Please fix well the measuring lever, counterweight and boom before carrying;
• When not in use for a long time, please cover the dust cover to prevent dust into the instrument interior. And the hardness block, indenter should be coated with antirust oil to prevent rusting after using;
• Long time after the re-enabled,it should be preheated the electrical components before test
• The hardness tester should be calibrated at least once a year to ensure its accuracy;
• Please regularly put a small amount of oil on the screw and the handwheel interface;
• Don’t disassemble the instrument without authorization, for maintenance related matters, please contact MITECH after-sale service department with 4000600280