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Summary of Contents for MITECH MH660
- Page 1 MITECH CO., LTD. www.mitech-ndt.com www.ponpe.com...
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Page 2: Table Of Contents
CONTENTS 1 Introduction................................2 1.1 Features of the instrument.........................2 1.2 Technical specifications..........................3 1.3 Standards and regulations applied......................3 1.4 Operating conditions...........................3 1.5 Application examples..........................3 1.6 Scope of delivery............................4 2 Product Feature..............................4 2.1 Structure feature............................4 2.2 Impact device D............................5 2.3 Other impact devices..........................5... -
Page 3: Introduction
1 Introduction This hardness tester is designed for testing metallic materials, the hardness of which ranges from very low to very high values. Hardness testing can be performed directly on-site and in any position. Typical applications are large, heavy workpieces which could only be transported to a hardness testing machine in a laboratory with great difficulty. -
Page 4: Technical Specifications
1.2 Technical specifications The error and repeatability of the test value see the following table. Table 1-1 Impact Hardness value of the Measuring Measuring accuracy Device test block Repeatability 760±30HLD ±6 HLD 6 HLD 530±40HLD ±10 HLD 10 HLD 760±30HLDC... -
Page 5: Scope Of Delivery
˗ Testing of workpieces for which the test indentation should be as small as possible on sharp edges; e.g. on rolls or grinded surfaces of machine parts. ˗ Automatic hardness tests of mass-produced parts during manufacturing operation; e.g. automotive industry. -
Page 6: Impact Device D
2.2 Impact device D 1,Release button 2,Loading tube 3,Guide tube 4,Coil unit 5,Connection cable 6,Support ring 7,Impact body During measurement with this hardness tester, an impact body with a hard tip is impacted by spring energy against the sample to be measured and then rebounds. During the impact, a permanent magnet integrated in the impact body passed through a coil in which voltage is induced by the forwards and backwards movement. -
Page 7: Screen Display
2.5 Screen display Below is the main screen of the main unit： Material – Selected material. Impact device – Type of impact device connected to the main unit Impact direction – Impact direction setting (“AUTO” when automatically detecting the direction and auto correction);... -
Page 8: Measuring Conditions
2.7 Measuring conditions In order to avoid erroneous measurements: ˗ Make sure that no heat or surface deformations occur at the testing point during the testing process. ˗ Ensure the surface of the workpiece is clean, smooth and dry. -
Page 9: Configuration Of The Standby Settings
The instrument carries out a self-check and then switches over to the measure mode automatically if there is no key operation. The instrument is now ready for the first measurement. The instrument will automatically reload last settings. It has a special memory that retains all of its settings even when the power is off. -
Page 10: Test Settings
Note: If a specific menu item is disabled (appears in a different color), the high light cursor will skip that item while navigating. 4.1 Test settings Press arrow keys or F2 key to navigate up and down to highlight the desired item. - Page 11 Incorrect type of the impact device will lead to erroneous result. 4.1.2 Impact direction setting The instrument offers two methods for correction for non-vertical impact direction: automatic and manual. With manual correction the user has to specify the actual impact direction. In automatic mode the instrument will find out the impact direction itself and apply the appropriate correction.
- Page 12 The hardness scale can be selected with the arrow keys, or by pressing F2 key. Press or F3 key to confirm the selection. Press key to cancel the change and close current dialog box. Dynamic HL values are converted to equivalent static hardness values, e.g. HV, HB and HRC, with a certain conversion scattering.
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Page 13: Memory Manager
Press F1 or F3 key to move the highlight cursor; Press arrow keys to increase/decrease the values. Press or F3 key to confirm the setting. Press key to cancel the change and close current dialog box. Note: The setting limit cannot exceeds the measure range. -
Page 14: Multi-Point Calibration
Note: Base calibration for a impact device must be carried out before enabling auto detecting the impact direction of that impact device. The calibration results are stored in the EEPROM of the main unit and the stored calibration ... -
Page 15: System Configuration
On the Add Calibration Point dialog box, the average test value is displayed. Step 6, Input the nominal value of this reference block by pressing F1, F2 and arrow keys. Step 7, Press or F3 key to complete the ... - Page 16 4.5.4 LCD brightness LCD background illumination can be adjusted. The setting can be changed by scrolling with F1 (increase) and F2 (decrease) keys, or by pressing arrow keys. Press or F3 key to confirm the setting. Press key to cancel the change and close the dialog box.
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Page 17: Hlx Conversion Function
Use F1 and F2 keys to move the cursor. Use arrow keys to increase/decrease the values; Press or F3 key to confirm the setting. Press key to cancel the setting change and close the dialog box. Once set, the internal clock of the instrument will maintain the current date and time. -
Page 18: Product Information
4.7 Product information Information concerning the instrument model, the software version and the serial number of the main unit is displayed. Press , F1 or F3 key to close the dialog box. 4.8 Replace the batteries When the battery capacity runs out, the batteries should be replaced. The user should replace the batteries following the program below: Turn off the instrument. -
Page 19: Operation
The gauge then try to set up a connection with the mini-printer via Bluetooth. Wait for several seconds. When the Bluetooth status light on the front panel of the main unit is always on, the Bluetooth connection between the instrument and the mini-printer is established successfully. - Page 20 5.1.2 Coupling The following requirements must be met for the coupling: The contact surface of the sample and the surface of the base plate must be level, flat and ground smooth. The impact must be carried out perpendicular to the coupled surface.
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Page 21: Triggering The Impact
When concave or convex surfaces are tested, the impact body either does not entirely leave the test tube or comes out too far. Special support rings are available to accommodate smaller radii on convex or concave surface. -
Page 22: Number Of Impacts Per Measuring Area
This applies not only to conversion of the HL value into static indentation hardness values, but also for converting from one static hardness measuring method to another. The conversion deviations (±HB, ±HV, etc.) represent “standard deviations”, i.e. 68% of all materials tested to date fell within the specified variance range. -
Page 23: Fault And Troubleshooting
6 Fault and Troubleshooting Fault description Possible Causes Troubleshooting Low battery voltage Replace the batteries Reversal of the battery installation Pay attention to the battery The main unit can’t start up polarity The device is too cold... -
Page 24: Maintenance
7.1.1 The main unit Check the operability of the display. Check the capacity of the battery. 7.1.2 Mechanical and electronic checks The performance check of the unit should be carried out as follows: In the case of continuous operation, at least once a day or at least after every 1000 impacts ... -
Page 25: Cleaning (After Each Use)
7.4 Cleaning (after each use) The devices do not require any particular care other than periodic cleaning of the impact body and the guide tube after performing approximately 1000 to 2000 tests. To clean the guide tube of the impact device, Unscrew the support ring. -
Page 26: Appendix
Appendix Table 1 Impact device Material Scale D/DC D+15 19.3 20.0 22.4 20.6 ～ ～ ～ ～ 20～68.5 67.9 69.5 70.7 68.2 38.4 47.7 37.0 ～ ～ ～ 99.8 99.9 99.9 Steel cast steel 81～654 80～638 80～683 90～646 83～663... - Page 27 Table 2 Material Testing Range (HLD) 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...
- Page 28 Table 3 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 Tip hardness: 1600HV 1600HV 1600HV 1600HV 5000HV Dia. tip: Material of tip: Tungsten Tungsten Tungsten Tungsten...
- Page 29 Table 4 Type Sketch Remarks Z10-15 For testing cylindrical outside surface R10～R15 Z14.5-30 For testing cylindrical outside surface R14.5～R30 Z25-50 For testing cylindrical outside surface R25～R50 HZ11-13 For testing cylindrical inside surface R11～R13 HZ12.5-17 For testing cylindrical inside surface R12.5～R17...
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Page 30: User Notes
Warranty ： The product is guaranteed for one year since purchased. Log www.mitech-ndt.com or follow our company official public platform to register for maintenance. Please fill the blanks as required, if the product is not registered for maintenance, it will follow the date of manufacturer.
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