午夜av福利_日本精品人妻无码77777_无套精品_国产在线欧美_天天综合永久_不卡一区二区三区四区_人人妻人人爽欧美成人一区_国产中文字幕av_男生操女生动漫_亚洲激情中文_精品视频自拍_黄色短篇小说集_精品人妻一区二区三区含羞草_亚洲 另类 日韩 制服 无码_亚洲激情文学

Mitech MHBRVS-187.5 digital multifunctional hardness tester, based on the mechanical principle of conical diamond 

or spherical cemented carbide indenter pressing into the sample surface to produce indentation, realizing Brinell, Rockwell, Vickers three different materials hardness measurement by measuring the depth or diameter of the indentation.  With novel appearance, full-featured, high sensitivity touch screen design, equipped with embedded operating system, simple

 and intuitive to meet the needs of a variety of hardness testing. It is widely used in metal processing and manufacturing, various metal material’s failure analysis and other fields like colleges and research institutions. It is the new type multifunctional testing instrument for mental and part of the the non-metallic materials research and hardness test. 

l Used for quality control in metal processing manufacturing

l Used for failure analysis testing of metallic materials;

l Demonstration experiment for education and teaching in Colleges and Universities;

l Hardness testing of materials in scientific research institutions

Brinell hardness test: Test force(F) is on the steel ball with certain diameter(D) , pressed on sample surface. After a period of time, cancel the force. The indentation diameter is get by measuring with micrometer ocular,thus to calculate the average pressure(N/mm2).Then we can get the Brinell hardness.

Rockwell hardness test is a vertex angle of 120 ° diamond cone or a certain diameter of the hardened steel ball as a pressure to the specified test force will be pressed into the sample surface, according to the sample surface indentation depth to be measured The Rockwell hardness of metallic materials.

Micro-Vickers (or Knoop) hardness test principle is that put the provisions of the positive pyramid diamond indenter into the sample surface(with fixed experimental force) and maintain a certain length (holding), and then unloading. Finally, there is a positive quadrangular pyramid or kenup indentation with a square surface on the surface of the specimen. Then we can attain the area of indentation via measuring the length of the diagonal by a micrometer eyepiece. Then the corresponding Vickers (or Knoop) hardness values are obtained.

l Operation Temperature：18～28℃;

l Relative Humidity：≤65％;

l Clean environment, no vibration;

l No corrosive media around.

l Equipped with Brinell, Rockwell, Vickers three hardness test indenters, full-featured, widely used, it can meet hardness testing needs for various metallic and non-metallic materials.

l With high sensitivity touch display, easy for operation, it can display the test result intuitively.

l Unique displacement sensing system design greatly reduces the error of the test result obtained by the indentation depth.

l Designed with adjustable cold light source measuring system, it can control the light strength through the software;

l Equipped with high-speed thermal printer to print test results in real time.

l Consistent with GB/T230, GB/T231, GB/T4340, JJG144-1999, ISO 6508, ASTM E 10, ASTM E92, ASTM E18, ASTM E384, ASTM E103 and other relevant domestic and foreign standards.

l Read the manual carefully before using the instrument. Learn the operation steps and       attentions to avoid damage the instrument or personal safety accidents caused by improper operation.

l User should follow the operating procedures and calibrate the instrument repeatedly with the standard block before and after testing. If idled for a long time, the instrument should be calibrated several times after restarting, and then test the parts after the test result is stable;

l 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.

l When the test force is applied to the test specimen, It is strictly forbidden to decline or raise the screw to avoid damaging the indenter.

l The use period of the hardness block is one year. The distance between two adjacent indentions center or the distance from the indentation center to edge of specimen is not less than 3mm. Too closely distance will affect the test result.

l Pay attention to palm the instrument for carrying to forbid falling across. Please pull out the power plug and fix well the measuring lever, counterweight r and boom before carrying.

l When replacing the fuse or removing the counterweight, please turn off the power first. 

l 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.

l The hardness tester should be calibrated at least once a year to ensure its accuracy.

l Don’t disassemble the instrument without authorization, maintenance related matters please contact MITECH after-sale service department with 4000600280.