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HK-D_HK-DB-BA-e-2020

The display unit

1.  Housing
2.  Connection for connecting cable
3.  Connection for rebound sensor
4.  Control buttons
5.  LCD screen
6.  Key description on the back of the housing

The D-type rebound sensor

1 2 3 4 5 6 7

Different types of rebound sensors

DC DL C D+15 E G

4

2

1

6

3

5

1.  Release button
2.  Charging Tube
3.  Guide Tube
4.  Coil
5.  Connection cable
6.  Rebounders
7.  Stabilisation ring

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Summary of Contents for HK-D

Page 1: ...alingen e mail info kern sohn com Phone 49 0 7433 9933 0 Fax 49 0 7433 9933 149 Internet www sauter eu Instruction manual mobile Leeb hardness tester SAUTER HK D HK DB Version 2 0 04 2020 GB HK D_HK DB BA e 2020 PROFESSIONAL MEASURING ...

Page 2: ...uctural characteristics and test principle 9 3 1 Tree features device view 9 3 2 The LEEB test principle 11 4 Technical data 11 5 Testing 12 5 1 Preparing and checking the supplied accessories 12 5 2 Test procedure 13 6 Special Operating Instructions 16 7 Detailed test procedure description 16 7 1 Commissioning 16 7 2 Switching on and off 16 7 3 Testing 17 7 4 Menu Structure Diagram 19 7 5 Setting...

Page 3: ...HK D_HK DB BA e 2020 3 10 Notes on transport and storage conditions 32 11 Parts subject to wear and tear which are not covered by the scope of warranty 32 12 https www kern sohn com shop de DOWNLOADS 33 ...

Page 4: ...ecific requirements of different users Seven rebound sensors are available for special applications These do not need to be recalibrated after replacement the system has an automatic type recognition of the rebound sensors Large memory capacity can store more than 600 measurement groups number of rebounds 32 1 in the internal non volatile measurement memory The upper and lower limits can be preset...

Page 5: ... Material identification of the metal type Fast tests on a large scale and various measuring positions for heavy work objects Test area Table 1 Material Hardnes s method D DC D 15 C G DL Steel and Cast steel HRC 17 9 68 5 19 3 67 9 20 0 69 5 20 6 68 2 HRB 59 6 99 6 47 7 99 9 37 0 99 9 HRA 59 1 85 8 HB 127 651 80 638 80 683 90 646 81 646 AGM 83 976 80 937 80 996 80 950 HS 32 2 99 5 33 3 99 3 31 8 1...

Page 6: ...ronze Ku Alu Ku Zinc alloy HB 60 290 Wrought copper alloy HB 45 315 Table 2 No Material HLD Strength σb MPa 1 Structural Steel 350 522 374 780 2 High carbon 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 High strength steel 630 800 11...

Page 7: ...g body 11mJ 5 5g 7 2g 11mJ 7 8g 2 7mJ 3 0g 90mJ 20 0g Tough test tip Diameter hardness test tip Material of the hardness test tip 1600HV 3mm Tungsten carbide 1600HV 3mm Tungsten carbide 1600HV 3mm Tungsten carbide 1600HV 5mm Tungsten carbide Diameter rebound sensor Length rebound sensor Weight rebound sensor 20mm 86 147 75mm 50g 20mm 162mm 80g 20mm 141mm 75g 30mm 254mm 250g Max Hardness of the pat...

Page 8: ...le types of Rebound sensors D General tests DC tests holes or cylindrical cavities DL tests slender or narrow hollows or holes D 15 tests grooves or furrows sinks C tests small light thin parts and surfaces of hardened coatings G Tests large thick heavy or rough steel surfaces Table 4 as an option various support rings No Rupture of non conventional stabilising rings Notes 1 For testing cylindrica...

Page 9: ... For testing spherical inner surfaces SR16 5 SR30 12 For testing cylindrical outer surfaces Radius is adjustable R10 2 4 Working conditions Temperatures 10 C to 40 C Relative air humidity 90 The device should not be exposed to vibrations strong magnetic fields corrosive agents and strong dust in the environment 3 Structural characteristics and test principle 3 1 Structural characteristics and test...

Page 10: ...r rebound sensor 4 Control buttons 5 LCD screen 6 Key description on the back of the housing The D type rebound sensor 1 2 3 4 5 6 7 Different types of rebound sensors DC DL C D 15 E G 4 2 1 6 3 5 1 Release button 2 Charging Tube 3 Guide Tube 4 Coil 5 Connection cable 6 Rebounders 7 Stabilisation ring ...

Page 11: ...HLD Measuring direction all directions possible 360 LCD display 128 x 64 matrix backlit LCD Data memory 48 up to 600 measuring groups number of rebounds 1 to 32 each Measurement results can be automatically converted into HL HB HRB HRC HRA HV HS Weight of the rebound body 5 5 g diameter of the test tip 3mm Material of the test tip tungsten carbide Range for upper and lower limit value the same as ...

Page 12: ...ce of the test piece The preparation of the surface of the test piece should conform to the relative requirements of Annex Table 3 During preparation heating as well as cooling of the surface of the test piece should be avoided as this can significantly affect the hardness test measurement Too much roughness of the surface to be measured can lead to incorrect measurements ERROR Therefore the surfa...

Page 13: ...dness tester Specific procedure for the setting see Chap 6 9 Setting the measurement conditions of the tester Specific procedure for the setting see Chap 6 5 5 3 Test procedure The hardness tester should be checked with a standard hardness test block The ERROR value and the repeatability of the value to be read are given in Table 5 in the Appendix Note The hardness value of the standard hardness t...

Page 14: ...of any one rebound point to the corner of the test piece should be as prescribed in Table 6 A comparative test must be carried out for each specific material to obtain the corresponding conversion ratio if this Leeb hardness value is to be converted into the other hardness values The procedure is as follows Tests are performed using the Leeb hardness tester or other equivalent hardness tester whic...

Page 15: ...ness What the measurement result expresses The hardness value appears on the display above HL the Leeb hardness symbol The type of rebound sensor can be read to the right after the letters HL For example 700HLD means that the hardness is 700 measured with the rebound sensor D For other hardness types into which Leeb hardness has been converted the corresponding hardness symbol should be added befo...

Page 16: ...n of measuring tensile strength so the default setting σb σb cannot be changed if other types of rebound sensors are used If the presetting has been made using the D DC rebound sensor in σb gewechselt the setting Hardσb in Hard will be changed if another rebound sensor is installed instead of the D or DC type If σb tensile strength has been preset the hardness scale cannot be set the cursor skips ...

Page 17: ...le Hardness scale of the current measured value Measured value The current measured value in single measurement mode is displayed without average measured value display or the current average value is displayed means the value is above the conversion value or measuring range bedeutet it is below Material Displays the current preset material Number of rebounds Shows the number of rebounds performed...

Page 18: ...ted Use the keys und wird to display the individual measured value The average value or the last measured value can be displayed again by pressing the ESC aufgezeigt key The viewing sequence varies depending on the oder key Press the key AVG kann to end the test even if the preset rebound number has not yet been reached and the average value calculated from this is displayed Use the key wird to sw...

Page 19: ...uation refers to the corresponding relationship of Leeb hardness and other hardnesses for a particular material which has been established on the basis of extensive testing According to the conversion relationship the value measured in Leeb hardness is automatically converted into other hardness scale values by means of the converter located in the hardness tester 7 4 Menu Structure Diagram Both t...

Page 20: ... the cursor cannot be used to select the function Hard бb for other rebound sensors 3 the arrow symbol on the lower left side of the menu and indicates that the menu does not end yet and further submenus follow downwards These can be changed to aufgezeigt by pressing The symbol on the upper side of the menu and indicates that the menu does not end yet and further submenus follow at the top These c...

Page 21: ...n to cancel kann Note 1 After changing the material preset the hardness scale setting automatically returns to the LEEB hardness HL 2 it is therefore recommended to select the material first then the hardness scale 3 the arrow symbol on the lower left side of the menu and indicates that the menu does not end yet It can be scrolled down using the key The symbol on the upper side of the menu indicat...

Page 22: ...elect the material first then the hardness scale 3 the hardness scale setting automatically returns to HL once the material has been changed and confirmed Setting tolerance limit Enter the number with the keys 0 9 wird The cursor automatically slides to the next number Confirm with the key ENTER wird Press the ESC button to cancel kann Note 1 If the specified value exceeds the measuring range the ...

Page 23: ...ress ENTER bestätigt Print the current measured value Info The serial number of the device is located on the outside of the box and on the back of the tester Printing a stored measured value As far as Print Memory is concerned the measuring group must first be selected and all the measuring groups stored there will then appear on the display Use the numeric key to enter the value and the cursor au...

Page 24: ...24 HK D_HK DB BA e 2020 ...

Page 25: ...g again Note 1 the current number of measurement groups is printed in case the preset number exceeds the current range 2 it makes no difference to the printing sequence whether the measuring group from the beginning or the one from the end is printed first i e if measuring group 1 to 5 is to be printed it makes no difference whether the sequence from 1 to 5 or from 5 to 1 is entered 3 the larger t...

Page 26: ...easuring group on are shown in the memory At View From End werden the values from the last measuring group on are shown in the memory View from the selected measuring group no Go to View From No und and the item to be selected is shown Use the number key to enter the desired value Press ENTER werden to call up the memory data from the selected initial group Press the key ESC wird to cancel the pro...

Page 27: ... All The function Delete All werden deletes all existing data in memory Deletion confirmation Use the keys und wird to move the cursor to YES bewegt and confirm the deletion process with the key ENTER wird Use the keys und wird to move the cursor to NO bewegt and with the key ENTER wird the deletion process is aborted 7 8 Browse stored data groups Up to eight measurement groups can be displayed si...

Page 28: ...ENTER wird key to change the setting directly or to change it yourself on the corresponding screen page With the key ESC gelangt you go back The functions Auto Save Auto Delete Auto Trans Key Sound Warn Sound können on ON oder OFF gesetzt are used If the function Auto Save auf became ON gestellt the current measurement group can be saved automatically after the measurement after the average value ...

Page 29: ...age times or number of erased data If the function is Auto Down auf ON gestellt the instrument switches off if no key is pressed or a measurement is taken within 5 minutes LCD brightness control To increase the brightness press the button to decrease it press the betätigt button Confirm with the key ENTER wird Press the ESC button to cancel kann Time and date setting This page shows the current ti...

Page 30: ...DB but not with the HK D It can also be purchased as an option The hardness tester must also be calibrated if the device has not been used for a long period of time It is sufficient to calibrate each individual rebound sensor once in conjunction with the display unit recalibration is no longer necessary after a rebound sensor has been replaced The key und is pressed simultaneously with the key ENT...

Page 31: ...shutdown If the power supply is no longer guaranteed the display shows Battery Empty und the instrument switches off automatically 7 14 Battery replacement When the battery capacity is exhausted this symbol appears which flashes constantly The batteries should then be changed according to the following procedure The hardness tester must be switched off Open the screw of the battery compartment usi...

Page 32: ...rewed back on The rebound device should be released unlocked after use Any kind of liquid inside the rebound body is strictly prohibited 2 Simple maintenance measures If the Rockwell hardness test block is used for testing and the error factor is greater than 2 HRC this may be due to the worn tip of the rebound sensor Consideration should be given to replacing this spherical tip If any other abnor...

Page 33: ...HK D_HK DB BA e 2020 33 Mini USB data transfer cable Batteries Note To view the CE declaration please click on the following link 12 https www kern sohn com shop de DOWNLOADS ...

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