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MITECH MH600, User Manual

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MITECH MH600 User Manual Download Page 28

27

mvip@mitech-ndt.com

Table 3

Impact device

DC(D)/DL

D+15

C

G

E

Impacting energy

Mass of impact body

11mJ

5.5g/7.2g

11mJ

7.8g

2.7mJ

3.0g

90mJ

20.0g

11mJ

5.5g

Tip hardness:

Dia. tip:

Material of tip:

1600HV

3mm

Tungsten

carbide

1600HV

3mm

Tungsten

carbide

1600HV

3mm

Tungsten

carbide

1600HV

5mm

Tungsten

carbide

5000HV

3mm

Synthetic

diamond

Impact device diameter:

Impact device length:

Impact device weight:

20mm

86(147)/

75mm 50g

20mm

162mm

80g

20mm

141mm

75g

30mm

254mm

250g

20mm

155mm

80g

Max. hardness of sample

940HV

940HV

1000HV

650HB

1200HV

Mean roughness value of

sample surface Ra:

1.6μm

1.6μm

0.4μm

6.3μm

1.6μm

Min. weight of sample:

Measure directly

Need support firmly

Need coupling tightly

>5kg

2

～

5kg

0.05

～

2kg

>5kg

2

～

5kg

0.05

～

2kg

>1.5kg

0.5

～

1.5kg

0.02

～

0.5kg

>15kg

5

～

15kg

0.5

～

5kg

>5kg

2

～

5kg

0.05

～

2kg

Min. thickness of sample

Coupling tightly

Min. layer thickness for

surface hardening

5mm

≥0.8mm

5mm

≥0.8mm

1mm

≥0.2mm

10mm

≥1.2mm

5mm

≥0.8mm

Size of tip indentation

Hardnes

s

300HV

Indentation

diameter

Depth

of

indentation

0.54mm

24μm

0.54mm

24μm

0.38mm

12μm

1.03mm

53μm

0.54mm

24μm

Hardnes

s

600HV

Indentation

diameter

Depth

of

indentation

0.54mm

17μm

0.54mm

17μm

0.32mm

8μm

0.90mm

41μm

0.54mm

17μm

Hardnes

s

800HV

Indentation

diameter

Depth

of

indentation

0.35mm

10μm

0.35mm

10μm

0.30mm

7μm

--

--

0.35mm

10μm

Suitability

DC: Test hole

or

hollow

cylindrical;

DL:Testslende

r

narrow

groove or hole

Test

groove or

reentrant

surface

Test small,light,

thin parts and

surface

of

hardened layer

Test large,

thick,heav

y

and

rough

surface

steel

Test

super

high

hardness

material

[email protected]

Summary of Contents for MH600

Page 1: ...MITECH CO LTD www mitech ndt com www ponpe com ...

Page 2: ...ss scale setting 12 4 1 5 Hardness Strength setting 12 4 1 6 Average times setting 12 4 1 7 Tolerance limit setting 12 4 2 Memory manager 13 4 3 Base calibration Impact device calibration 13 4 4 Multi point calibration 14 4 5 System configuration 15 4 6 HLX conversion function 17 4 7 Product information 17 4 8 Replace the batteries 18 4 9 Communication 18 5 Operation 18 5 1 Preparation of the samp...

Page 3: ...2 mvip mitech ndt com Table 2 26 Table 3 27 Table 4 28 User Notes 29 sale ponpe com ponpe com ...

Page 4: ...orrection Impact direction automatically detected and corrected after base calibration except type G high measuring accuracy in every impact direction convenient measurement in any position Scale Integrated conversion of the measured values to other popular hardness scales e g HRC Rockwell HRA HRB HV Vickers HB Brinell HS Shore HL Leeb Rm Tensile strength for steel Calibration Base calibration fun...

Page 5: ... about 100 hours with default brightness Communication USB1 1 PC software is provided to transfer data between the instrument and PC Multiple display languages English Chinese etc Weight Approximately 220g Dimensions 150mm 76mm 38mm 1 3 Standards and regulations applied ASTM A956 2006 CNAL T0299 2008 JIS B7731 2000 DIN 50156 2007 DGZfP Guideline MC 1 2008 VDI VDE Guideline 2616 Paper 1 2002 ISO 18...

Page 6: ...ppendix Note Test block It is necessary to regularly conduct 3 to 10 test impacts on a reference hardness object to verify the correct operation of the instrument Various test blocks are available depending on the users hardness requirements For added convenience the test blocks also indicate the reference hardness value in different hardness scales Support rings Leeb Rebound testers only work cor...

Page 7: ...d stored in the unit memory if set to strore 2 3 Other impact devices DC DL C D 15 E G The main unit can be combined with any impact device to accommodate specific needs Special impact devices are available for use in confined spaces with special component geometry or surface finish 2 4 Leeb rebound principle for hardness testing This hardness tester operates according to the Leeb principle in whi...

Page 8: ...executed Functions are programmed and assigned to the function keys F1 to F3 Note that the assignment of the function keys changes depending on the current dialog menu Testing operation could be carried out under this main screen After each impact it will display a singled measured value impact count plus one the buzzer would alert a long howl if the measured value is not within the tolerance limi...

Page 9: ... surfaces produce excessively large HL values the actual hardness is less than measured 3 Startup 3 1 Power supply Two AA size alkaline batteries are needed as the power supply The battery compartment is situated at the instrument back The cover is fastened with two screws To insert the batteries Loosen the two screws of the battery cover Lift the cover off upward Insert the batteries into the bat...

Page 10: ...ssing down key until shutting down message appears Note The instrument will shut off automatically if the battery capacity level is too low 3 4 Configuration of the standby settings To save battery power the device supports the following power states Run state The main unit is running at full frequency Standby state After 5 seconds default setting the brightness of the LCD display is tuned to a lo...

Page 11: ...ge the setting or open the setting dialog Press or F1 key to return to the main menu Preselected parameters of test setting Impact device Automatically identified Impact direction Automatically detected and corrected Material Steel and cast steel Hardness scale HLD if available for connected impact device type Average times three 4 1 1 Impact device setting The impact device setting can be fixed t...

Page 12: ...alue will be corrected automatically by the main unit Note AUTO item is disabled for G type of the impact device The main unit detects the impact direction correctly only after base calibration If only vertical down measurements are performed disabling AUTO mode is preferable 4 1 3 Material setting Press arrow keys or F2 key to navigate to the desired material Press or F3 key to confirm the select...

Page 13: ...al before changing the hardness scale 4 1 5 Hardness Strength setting The instrument has an feature that allows the user to convert hardness readings into tensile strength Note Only impact device D and DC have the function of strength test option You can not change the Hardness Strength setting fixed to hardness when using other types of impact device Press or F3 key to select between hardness and...

Page 14: ...arrow keys to navigate up and down Press F3 or key to close the dialog box 4 3 Base calibration Impact device calibration Base calibration is based on a standard conversion function std H L and shifts this vertically so that the conversion of the specified HL value L1 coincides with the known converted value H1 Base calibration is typically used if only one workpiece with known hardness in the req...

Page 15: ...lti point calibration process prepare 2 to 5 reference blocks with known hardness value calibrated using other test method The reference blocks should conform to the measuring conditions of this instrument Procedure of the multi point calibration Step 1 open multi point calibration dialog box Step 2 Press or F3 key to start the calibration process The display will be switched back to the main scre...

Page 16: ...eselected parameters of system configuration Auto save Disabled Key sound Enabled Warn sound Enabled LCD brightness 20 of the full brightness Display standby After 5 seconds of idleness no operating Auto power off After 2 minutes of idleness no operating 4 5 1 Auto save When Auto Save is set to On the measurement series will be automatically stored when the set number of values average times for a...

Page 17: ... of time as selected Trigger the impact or press any key to reactivate the main unit from standby state 4 5 6 Configuration of the auto power off settings The change from standby state to power off state is controlled by the setting of auto poweroff delay The time delay can be configured by the user in the auto poweroff delay dialog box Press arrow keys or F2 key to select the desired item Selecti...

Page 18: ...nstrument Activate the System Reset function Then you will see right dialog Press F3 key to confirm the reset operation Or press F1 key to cancel the reset operation NOTE The effects of resetting the instrument may not be reversed No key action should be performed during resetting process 4 6 HLX conversion function HLX conversion function helps to convert HLD values to HLC HLG HLDL and HLD 15 and...

Page 19: ...rmation of the communication software and its usage refer to the software manual 5 Operation Caution Insufficient preparation of the test procedure may damage to the unit and or the sample to be measured Before each test procedure Clean if necessary Carry out performance check Check or change settings impact device impact direction materials scales etc 5 1 Preparation of the sample Preparation for...

Page 20: ...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 Impact devices types Minimum sample thickness for coupling D DC DL E 3mm G 10mm C 1mm Coupling procedure Apply a thin layer of coupling paste to the contact surfa...

Page 21: ...rry out an impact in an area that has already been deformed by another impact Measuring procedure Depress loading tube carefully until contact is felt Allow it to slowly return to the starting position The device is now ready for carry out the hardness test Handling of impact device DC Place the loading stick adjacent to the test area Then plunge the face of impact device coil side over the stick ...

Page 22: ...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 Comparing hardness values with each other is thus always subject to inaccuracies This not only holds true for the conversion of the...

Page 23: ... badly worn Replace the tip ball The test sample is not properly supported Support the test sample properly Measured values on test block are continuously too low Impact device is dirty Impact body is damaged Replace impact body Measured values on test block are continuously too high Impact body tip flattened Replace impact body Test block is worn Replace test block Poor repeatability of the test ...

Page 24: ...tep4 install the impact body and support ring when complete Release the impact body after use Any lubricant is prohibited inside the impact device Maintenance of the impact body To ensure that the impact body is good condition it should be tested regularly on a test block performance check The impact body is subject to wear and can be easily and economically replaced by the user calibration of the...

Page 25: ...rranty When used in accordance with the manufacturer s written instructions and under normal operating conditions the instrument is conditionally guaranteed to be free from defects in material and workmanship for a period of two years from date of shipment This warranty shall not apply to equipment subjected to misuse or abuse improper installation alteration neglect or accident Excluded from this...

Page 26: ... 32 2 99 5 33 3 99 3 31 8 102 1 35 8 102 6 30 6 96 8 Cold work tool steel HRC 20 4 67 1 19 8 68 2 20 7 68 2 22 6 70 2 HV 80 898 80 935 100 941 82 1009 Stainless steel HRB 46 5 101 7 HB 85 655 HV 85 802 Grey cast iron HRC HB 93 334 92 326 HV Nodular cast iron HRC HB 131 387 127 364 HV Cast aluminum alloys HB 19 164 23 210 32 168 HRB 23 8 84 6 22 7 85 0 23 8 85 5 BRASS cop per zinc alloys HB 40 173 ...

Page 27: ...rbon steel 500 710 737 1670 3 Cr steel 500 730 707 1829 4 Cr V steel 500 750 704 1980 5 Cr Ni steel 500 750 763 2007 6 Cr Mo steel 500 738 721 1875 7 Cr Ni Mo steel 540 738 844 1933 8 Cr Mn Si steel 500 750 755 1993 9 Super strength steel 630 800 1180 2652 10 Stainless steel 500 710 703 1676 sale ponpe com ponpe com ...

Page 28: ... tightly 5kg 2 5kg 0 05 2kg 5kg 2 5kg 0 05 2kg 1 5kg 0 5 1 5kg 0 02 0 5kg 15kg 5 15kg 0 5 5kg 5kg 2 5kg 0 05 2kg Min thickness of sample Coupling tightly Min layer thickness for surface hardening 5mm 0 8mm 5mm 0 8mm 1mm 0 2mm 10mm 1 2mm 5mm 0 8mm Size of tip indentation Hardnes s 300HV Indentation diameter Depth of indentation 0 54mm 24μm 0 54mm 24μm 0 38mm 12μm 1 03mm 53μm 0 54mm 24μm Hardnes s 6...

Page 29: ...5 17 For testing cylindrical inside surface R12 5 R17 6 HZ16 5 30 For testing cylindrical inside surface R16 5 R30 7 K10 15 For testing spherical outside surface SR10 SR15 8 K14 5 30 For testing spherical outside surface SR14 5 SR30 9 HK11 13 For testing spherical inside surface SR11 SR13 10 HK12 5 17 For testing spherical inside surface SR12 5 SR17 11 HK16 5 30 For testing spherical inside surfac...

Page 30: ...eporting to repair sheet In accordance with the international relevant regulations the following are not within the scope of free warranty Damage caused by man made or improper keeping Self dismantle or non special repair shop dismantle Do not follow the requirement of service registration or warranty expired Consumable parts Service promise MITECH users have lifelong maintenance service Free main...

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