Related Manuals for MRC MH320
Summary of Contents for MRC MH320
- Page 1 MH320 Leeb Hardness Tester User’s Manual 3, Hagavish st. Israel 58817 Tel: 972 3 5595252, Fax: 972 3 5594529 mrc@mrclab.com MRC.11.21...
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Page 2: Table Of Contents
1 Overview ........................3 1.1 Advantages ........................3 1.2 Main Application &Testing Range ................... 3 1.2.1 Main Application ......................3 1.2.2 Testing Range......................... 3 1.3 Configuration ........................4 1.4 Working Conditions ......................4 1.5 Safety Instructions ......................4 2 Structure Feature &Testing Principle ................5 2.1 Structure Feature ....................... - Page 3 6.5.6 Hardness/бb Setting ..................... 17 6.6 Print Function ......................... 17 6.6.1 Print Current ........................ 17 6.6.2 Print Memory ....................... 18 6.6.3 Print All Memory ......................18 6.6.4 Paper Feeding ......................18 6.7. Memory Manager ......................18 6.7.1 View from No.1 Group/View from Ending Group ............18 6.7.2 View from Selected No.
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Page 4: Overview
1 Overview 1.1 Advantages Wide measuring range. Based on the principle of Leeb hardness testing theory. It can measure the Leeb hardness of all metallic materials. Large screen (128×64 dot matrix LCD), showing all functions and parameters. Test at any angle, even upside down. ... -
Page 5: Configuration
1.5 Safety Instructions The instrument can only work with the specially designed battery pack and power adapter (charger) supplied by MRC LTD. Working with others may result in damage of the instrument, battery leakage, fire or even explosion. Do not cast the battery pack into fire and do not short circuit, disassemble or heat the battery pack, otherwise battery leakage, fire or even explosion may occur. -
Page 6: Structure Feature &Testing Principle
SAVE FEED MENU ENTER 2.1.2 Parts of the Main body HL0108070811 HARDNESS TESTER MODEL: MH320 BATTERY: 6V NI-MH CHARGER: 9V DC CAUTION: 1 Do not disassemble 2 Do not dispose of in fire or water 3 Use only supplied AC-DC adapter... -
Page 7: D Type Impact Device
2.1.3 D Type Impact Device 1 Release button 2 Loading tube 3 Guide tube 4 Coil unit 5 Connection cable 6 Impact body 7 Support ring 2.1.4 Different Types of Impact Device D+15 2.2 Leeb Hardness Testing Principle The basic principle is: use an impact body of certain weight impacts against the testing surface under certain test force, then measure the impacting velocity and the rebounding velocity of the impact body respectively when the spherically test tip is located 1mm above the testing surface. -
Page 8: Technical Specifications
3 Technical Specifications Error and repeatability of displayed value see Table 3-1. Table 3-1 Type of impact Hardness value of Leeb Error of displayed Repeatability device standard hardness block value 760±30HLD ±6 HLD 6 HLD 530±40HLD ±10 HLD 10 HLD 760±30HLDC ±6 HLDC 6 HLD... -
Page 9: Preparation & Testing
4 Preparation & Testing 4.1 Preparation & Inspection before Testing 4.1.1Preparation of Sample Surface Preparation for sample surface should conform to the relative requirement in the Appendix Table 3. In the preparation processing for sample surface, the hardness effect of being heated or cold processing on the surface of sample should be avoided. -
Page 10: 3Presetting Testing Condition
4.1.3Presetting Testing condition See 6.5 for details. 4.2 Testing Program Verification of the tester is by using standard test block. The error and repeatability of displayed value should be within the regulation of Appendix table 2. Note： Use a calibrated hardness tester, test the standard test block downward vertically for 5 times, the arithmetical average value compare with the value of standard test block. -
Page 11: Read Measured Value
contrastive test is needed to get conversion relations for the special material. Use inspection qualified Leeb hardness tester and corresponding hardness tester to test at the same sample respectively. For each hardness value, each measure homogeneously 5 points of Leeb hardness value in the surrounding of more than three indentations which need conversion hardness, using Leeb hardness arithmetic average value and corresponding hardness average value as correlative value respectively, make individual hardness contrastive curve. -
Page 12: Advice
5 Advice Replacing the impact device must be done during Power off. Otherwise the main body can not identify the type of the impact device, and it can damage the circuit board of the main body. You could not save the current test value if the test times are less than the presetting times value. -
Page 13: Operation In Details
6 Operation in Details 6.1 Power On Press【 】 to power on the system. The screen shows as below: MH320 HARDNESS TESTER MRC Inc. Probe Type:D The system would automatically detect the type of the impact device during power up, and would display this information on the screen. -
Page 14: Instruction Of The Main Display Interface
6.3.1 Instruction of the Main Display Interface Battery information Display the information of the rest capacity of the battery, and ： the charging status. Impact direction The present impact direction. ： Average value indicator It appears to show the mean value of the samples when ：... -
Page 15: Menu Structure
Press key 【MAT】 to change the material set. Presetting hardness scale recovers to HL automatically after material presetting changed. 6.4 Menu Structure Both presetting system parameters and the additional function could come true by menu operation. At the main display interface, press key【MENU】 into the main menu. -
Page 16: Test Set
6.5 Test Set At the main display interface, press key【MENU】 to enter the main menu. Press key 【ENTER】 to enter Test Set Test Set Menu. The symbol ↓ at the left side of Print Set underside menu indicates that the menu Memory Manager has not ended. -
Page 17: Material Setting
6.5.3 Material Setting When 【Hard/бb】is preset to hardness, it will display the following material: Steel and Cast Steel、 Cold Work Tool Steel、 Stainless Steel、 Gray Cast Iron、Nodular Cast Iron、Cast Aluminum Alloys、Copper-Zinc Alloys、Copper-Aluminum Alloys、 Wrought Copper and Wrought Steel. Press key【 】or【... -
Page 18: Tolerance Limit Setting
6.5.5 Tolerance Limit Setting Press 【 】 【 】 to move the cursor. Tolerance Limit --------------- Press 【 】 to change the 】 【 number. Press 【ENTER】 to confirm setting. Press 【ESC】 to cancel setting. 0890 Note:1. If the setting value exceeds the measure range, the instrument will remind you to reset. -
Page 19: Print Memory
6.6.2 Print Memory Print out the selected group of measured value stored inside the instrument. 6.6.3 Print All Memory Print out all the measured value stored inside the instrument. 6.6.4 Paper Feeding When the printer is powered on and ready for printing, press 【FEED】 key then the instrument will start manual paper feeding. -
Page 20: View From Selected No. Group
6.7.2 View from Selected No. Group Select Group Press 【 】 【 】 to move the cursor. From 001 to 010 Press 【 】 to change the 】 【 -------------- number. Press key【ENTER】 to start displaying memory data from the selected beginning group. -
Page 21: Browsing Memory Data Groups
Press key【ESC】could cancel deleting operation, no matter where the cursor 6.8 Browsing Memory Data Groups Press key 【 】 or 【 】 to see previous No.001 12/03 652HL or next page. No.002 12/03 587HL No.003 12/03 820HL Press key【ESC】to exit browsing. No.004 12/03 693HL Press key 【ENTER】... -
Page 22: System Set
6.9 System Set At the main display interface, press key【MENU】 enter the main menu. Press key 【 】 or key 【 】 to move the Test Set cursor to【System Set】Menu. Print Set Press key 【ENTER 】 to enter 【System Memory Manager Set】menu. -
Page 23: Lcd Brightness Set
Info】. Memory Manager Press key【ENTER】into 【Software System Set Info】screen. Software Info This screen displays the information MRC MH320 about the main body and the firmware. The version, the Code and the SN Version:1.00 would change with the firmware. Code:HL20000000 SN:HL2000000000... -
Page 24: System Calibration
6.11 System Calibration The tester and impact device must be calibrated using hardness block before use as the first time, or having not been used for a long time, or having reset the system. Press key【 】, meanwhile pressing【ENTER】to power on the system. Then the software calibration screen shows as below. -
Page 25: Paper Loading
6.14 Paper Loading Hold Both ends of the paper compartment with fingers and open compartment cover with moderate strength. According to the illustration, put the paper into the paper compartment with attention to the paper direction. If the paper is misplaced, the instrument will fail to print. -
Page 26: Connection Of Data Transmission Cable
Warning: Please pay much attention to the polarity of the battery during battery replacement. 6.17 Connection of Data Transmission Cable Insert one connection plug of the transmission cable into the USB socket on the right side of main body, and insert the another plug into the USB port on the back of computer box. -
Page 27: Appendix
APPENDIX Table 1 Impact device Material Method D/DC D+15 20～ 19.3～ 20.0～ 20.6～ 22.4～70.7 68.5 67.9 69.5 68.2 38.4～ 47.7～ 37.0～ 99.6 99.9 99.9 Steel and cast 59.1～ 61.7～88.0 steel 85.8 127～ 80～638 80～683 90～646 83～663 81～646 83～976 80～937 80～996 84～1042 80～950 32.2～... - Page 28 Table 2 Material Strength σ (MPa) Mild steel 350～522 374～780 High-Carbon steel 500～710 737～1670 Cr steel 500～730 707～1829 Cr-V steel 500～750 704～1980 Cr-Ni steel 500～750 763～2007 Cr-Mo steel 500～738 721～1875 Cr-Ni-Mo steel 540～738 844～1933 Cr-Mn-Si steel 500～750 755～1993 Super strength steel 630～800 1180～2652 Stainless steel...
- Page 29 Table 3 Type of impact device DC(D)/DL D+15 Impacting energy 11mJ 11mJ 2.7mJ 90mJ 11mJ Mass of impact body 5.5g/7.2g 7.8g 3.0g 20.0g 5.5g Test tip hardness: 1600HV 1600HV 1600HV 1600HV 5000HV Dia. Test tip: Material of test tip: Tungsten Tungsten Tungsten Tungsten...
- Page 30 Table 4 Type Sketch of Remarks non-conventional Supporting ring For testing cylindrical outside Z10-15 surface R10～R15 For testing cylindrical outside Z14.5-30 surface R14.5～R30 For testing cylindrical outside Z25-50 surface R25～R50 For testing cylindrical inside HZ11-13 surface R11～R13 For testing cylindrical inside HZ12.5-17 surface R12.5～R17 For testing cylindrical inside...
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