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MASHPROJECT TKM-359CE Operation Manual

Portable leeb hardness tester
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NPP Mashproject LLC
Saint-Petersburg, Russia
PORTABLE LEEB
HARDNESS TESTER TKM-359CE
Operation manual
TKM-359CE OM
1

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  • Page 1 NPP Mashproject LLC Saint-Petersburg, Russia PORTABLE LEEB HARDNESS TESTER TKM-359CE Operation manual TKM-359CE OM...

  • Page 2: Table Of Contents

    TKM-359CE OM TABLE OF CONTENTS: 1 DESCRIPTION OF THE HARDNESS TESTER ........4 1.1 INTENDED USE AND FUNCTIONS ......... 4 1.2 OPERATING PRINCIPLE ............6 1.3 TECHNICAL CHARACTERISTICS .......... 6 1.3.1 Basic technical characteristics ........6 1.3.2 Hardness tester probes ..........11 1.3.3 Additional devices and accessories ......
  • Page 3 TKM-359CE OM 2.9 HARDNESS SCALE SELECTION ........34 2.10 SETTING AVERAGING PARAMETERS ......34 2.11 DISPLAYING DATA ON THE SCREEN ....... 35 2.12 SETTING CONTROL THESHOLDS ........36 2.13 SETTING DIAGRAM THRESHOLDS ........37 2.14 SCALES CALIBRATION ............37 2.14.1 General information ........... 37 2.14.2 Scale calibration ............

  • Page 4: Description Of The Hardness Tester

    TKM-359CE hardness testers (hereinafter referred to as “hardness tester”) as well as respective operation, transportation, and storage rules. Based on ASTM and DIN norms.
  • Page 5 TKM-359CE OM (electrolytic precipitation, nitrogen hardening, HFC hardening, etc.) • Overlay welding and plated coating (chromium, etc.) • Articles made of fine-grained materials (for local investigation of material properties) When the physical and mechanical properties of the material being inspected differ from those of carbon structural steels, measurements should be carried out after setting up an additional calibration (or additional scale).

  • Page 6: Operating Principle

    TKM-359CE OM • To select an interface language from those preset by the manufacturer at the user’s request. 1.2 HARDNESS TESTER OPERATING PRINCIPLE The hardness tester implements a dynamic Leeb hardness control method. This method determines the ratio of the rebound rate to the rate of incidence of a carbide indenter from the surface of the article under inspection.
  • Page 7 TKM-359CE OM Within (300...450) НВ ±20 НВ Vickers Within (240...500)HV ±15 HV Within (500...800)HV ±20 HV Within (800...940)HV ±25 HV Hardness measurement range, reference scales: Ultimate tensile strength σb 350…1500 MPa Rockwell А 70,5 – 85,5 HRА Rockwell В 51 – 100 HRВ...
  • Page 8 TKM-359CE OM 20 – 70 HRC Stainless steel 45 – 100 HRB Gray cast iron (with lamellar graphite) 90 – 335 HB Ductile cast iron (with compact graphite), 130 – 390 HB high-strength cast iron (with nodular graphite) Aluminium alloys 30 –...
  • Page 9 TKM-359CE OM Atmospheric pressure 84 – 106,7 kPa Calibration period 1 year Hardness tester service life 5 years Number of potential additional 5 for each scale calibrations for the hardness tester Number of additional scales for the hardness tester Duration of one hardness...
  • Page 10 TKM-359CE OM 2 to 10 Number of samples required for (to be defined by the additional scales setup user) Piecewise linear or Intermediate interpolation of piecewise parabolic additional scales (to be defined by the user) Colour. Check limits to be set up by the user...

  • Page 11: Hardness Tester Probes

    TKM-359CE OM • Number of results falling outside Statistical the range set up by the user (outside processing bigger/ less limit), maximum deviation from upper/ lower limit • In reference to average value • In reference to value set up by the user Plotting of charts •...
  • Page 12 TKM-359CE OM Table 2 Leeb probes Overall dimensions, maximum Refer- Length, Diameter, ence Description desig- nation With With usu- con- usu- con- nec- nec- The probe, typically supplied with the Leeb hardness tester, is used for primary measurement tasks. The probe has increased...
  • Page 13 TKM-359CE OM Average nominal diameters of dents (mm) left on the surfaces of arti- cles during hardness measurement are listed in Table 3. Table 3 Reference 103 HB 209 HB 406 HB 763 HV designation (103 HV) (212 HV) (420 HV)

  • Page 14: Additional Devices And Accessories

    TKM-359CE OM Average nominal depth of dents (mm) left on the surfaces of articles during hardness measurement are listed in Table 4. Table 4 Reference 103 HB 209 HB 406 HB 763 HV designation (103 HV) (212 HV) (420 HV)
  • Page 15 TKM-359CE OM Table 6 Minimum thickness of Probe reference designation the article under inspection, mm D, E Specified thickness values may vary depending on the geometrical dimensions and hardness of the article. If the thickness of the article under inspection is less than specified, during measurements it will be necessary to additionally adhere to the requirements of section 1.3.6 “Measurements on light and thin-walled...

  • Page 16: Working With Non-Carbon Structural Steel Articles

    TKM-359CE OM 500 (without washer) The minimum diameter of the spot of article’s surface under inspection is according to Table 9. Table 9 Probe reference designation Spot radius, minimum, mm D, E 21 (6 without washer) 29 (7 without washer) 1.3.5 WORKING WITH NON-CARBON STRUCTURAL STEEL...
  • Page 17 TKM-359CE OM During the use of the hardness tester, there may arise a need to measure the hardness (or other properties) of materials with specific mechanical and physical parameters. In such cases, it is possible that additional calibration may not completely eliminate the resulting error.

  • Page 18: Measurements On Light And Thin-Walled Articles

    TKM-359CE OM There will be significant dispersion in device readings. To conduct immediate checks on such materials, it is necessary to use Leeb probes (D, E, G) to inspect these objects. These procedures may also not yield accurate results for articles with ultra-high or ultra-low hard- ness.
  • Page 19 TKM-359CE OM To determine the occurrence of additional errors, measurements performed by the hardness tester should be compared with those conducted using a static device. Elimination of additional errors on Elimination of additional errors on light and light and thin...

  • Page 20: Measuring Of Hardened Surface Layers, Galvanic Coatings, And Surface Deposits Hardness

    TKM-359CE OM The grounding method is suitable for thin articles (sheets), articles with a flat shape, and articles with mass comparable to the minimum specified in section 1.3.4 “Requirements for articles under inspection”. An example is Rockwell scale test blocks as per ASTM E140.

  • Page 21: Influence Of Article Surface Layer Properties

    TKM-359CE OM Dispersion in the readings can be eliminated by two methods: • Grinding the surface area (for example, using a grinding machine as per section 1.3.3 “Additional devices and accessories”) to achieve the required roughness specified in section 1.3.4 “Re- quirements for articles under inspection”;...
  • Page 22 TKM-359CE OM Table 10 Item Quantity Remark (pcs) Basic configuration Electronic unit D-type probe № Rechargeable battery Li-Po 3,7 В 1100 mА/h (included in electronic unit) Charger PC cable Soft case Strap for securing the device on the arm Carrying and storage bag...

  • Page 23: Design Of The Hardness Tester

    TKM-359CE OM 1.5 DESIGN OF THE HARDNESS TESTER 1.5.1 CONSTRUCTION From a functional viewpoint, the hardness tester comprises an electronic unit and a probe (see section 1.3.2 “Hardness tester probes”). The hardness tester electronic unit receives frequency signals transmitted by the probe, converts them into hardness units, displays measurement results, performs statistical processing, and other functions specific to the hardness tester.

  • Page 24: Menu Navigation

    TKM-359CE OM Display Keyboard Figure 1 1.5.2 HARDNESS TESTER MENU NAVIGATION The complete setting list (operational parameters etc.) of the hardness tester, except for the selection of work scales, (see «General structure of the menu», Table 11), is accessed through the graphical menu.
  • Page 25 TKM-359CE OM Name of menu/ sub menu Selected point of menu/ sub menu Menu points Figure 2 Switching between menu points is performed using of buttons Selection of a menu point (to access parameter settings or sub-men- us) is done with the button .
  • Page 26 TKM-359CE OM Scale Hardness scale selection Setting the averaging parame- Average ters (sample size and rejection 2.10 of extreme values) Setting the modes of displaying Output the results (numeric or dia- Data 2.11 settings gram) process- and output statistics Limits Setting control thresholds 2.12...

  • Page 27: Marking And Sealing

    TKM-359CE OM 1.6 MARKING AND SEALING OF THE HARDNESS TESTER 1.6.1 The rear panel of the electronic unit displays a tag indicating: • Manufacturer’s name • Model type of the hardness tester • Hardness tester serial number • Measurement tools approval sign 1.6.2 The probes may bear the hardness tester serial number and a...

  • Page 28: Hardness Measurement Procedure

    TKM-359CE OM The hardness tester operation cycle should include the following steps: • Preparation for operation and powering on • Serviceability check • Execution of settings (if required) • Measurement of hardness on articles. The contents and procedure of each step are described below.
  • Page 29 TKM-359CE OM 2.3.2 For probes with a built-in connecting cable plug, connect the cable to the plug located on the probe. 2.3.3 Connect the cable to the respective plug on the side wall of the electronic unit. 2.3.4 Switch on the hardness tester instantly by pressing button 2.3.5 The display will generally appear as shown in Figure 3.
  • Page 30 TKM-359CE OM Secure the test blocks to the plate following the procedure set forth in section 1.3.6 “Measurements on light and thin-walled articles”. 2.4.2 To check serviceability of the hardness tester with reference to additional calibrations of hardness tester scales or to additional scales, it is necessary to prepare the respective hardness test samples.

  • Page 31: Procedure For Hardness Measurement On Inspected Articles

    TKM-359CE OM Respective procedures are detailed in section 2.15.2 “Scales calibra- tion”, 2.15.3 “Additional calibration set up”. 2.5 PROCEDURE FOR HARDNESS MEASUREMENT ON INSPECTED ARTICLES 2.5.1 Check conformity of article(s) under inspection with requirements of section 1.3.4 “Requirements for articles under inspection”.

  • Page 32: Measurements Mode

    TKM-359CE OM 2.5.11 If necessary, analyse and/or withdraw the stored data to the computer as per section 2.16 “Memory management”. 2.5.12 Power off the device as per section 2.18 “Hardness tester shutdown”. 2.6 MEASUREMENTS MODE The hardness tester is ready for measurement immediately after switching on.

  • Page 33: Probe Type Selection

    TKM-359CE OM on the display (numeric or chart) and additional statistics displayed during the measurement process are configured through the hardness tester menu. To access the menu, briefly press the button. The thresholds for control are set through the hardness tester menu.

  • Page 34: Selection Of Controlled Material

    TKM-359CE OM 2.8 SELECTION OF CONTROLLED MATERIAL To select the type of material to be inspected (not available for the ultrasonic probe), select the menu items <MEASUREMENT MODE> - <MATERIAL>. In the list that appears (Fig.5), select ma- terial and click the button.

  • Page 35: Displaying Data On The Screen

    TKM-359CE OM NOTE: You can use the virtual keyboard to enter digits (e.g. the sample size). To do this, select a numeric parameter and press the button. Set the value using the keypad (Fig. 8). To remove the keyboard, press the button.

  • Page 36: Setting Control Thesholds

    TKM-359CE OM 2.12 SETTING CONTROL THRESHOLDS Select the menu items <DATA PROCESSING> - <LIMITS> to enter the mode. In the appeared window (Fig. 10), choose the alarm type (no alarm, more/ less than the threshold, out of range) and the threshold values themselves using the buttons .

  • Page 37: Setting Diagram Thresholds

    TKM-359CE OM 2.13 SETTING DIAGRAM THRESHOLDS To enter the mode, select the menu items <DATA PROCESSING> - <FIGURE>. In the appeared window (Fig. 11), use the buttons to set the limits of the figure. Use the virtual keyboard to set numeric values. (see the note in section 2.10 “Setting averaging parameters”).

  • Page 38: Scale Calibration

    TKM-359CE OM During the hardness tester supply process, all additional calibrations are equal with calibration of respective hardness tester scale (if not set up in advance upon user’s request). Calibration may be carried out either with two or with one test block (sample).
  • Page 39 TKM-359CE OM NOTE Password is: Then, it is expected that the display of the hardness tester will conform to Figure 12. Unit of measure Name of scale or additional calibration Result field Average readings Figure 12 Carry out several measurements (at least 5) following section 2.2.

  • Page 40: Additional Calibration Setup

    TKM-359CE OM If you are performing calibration with one test block, press button The display will confirm the completion of calibration with one test block, after which the hardness tester will return to the menu. If calibration with two test blocks is being carried out, perform measurements on the second test block as described above.

  • Page 41: Calibration Deletion

    TKM-359CE OM Before calibrating with a hardness sample, it is necessary to follow the procedures outlined in section 1.3.6 “Measurements performed on light and thin-walled articles”. To enter additional calibration mode, select the necessary hardness tester scale and additional calibration to be defined (see section 2.6 “Measurements mode”).

  • Page 42: Power Saving Mode Settings

    TKM-359CE OM 2.15 POWER-SAVING MODE SETTINGS To configure energy-saving modes, select the menu items <SETTINGS> - <ENERGY SAVING>. Then, in the appeared window (Fig. 15), use the buttons to set the automatic shutdown time and the duration for display backlight to turn off.

  • Page 43: Selection Of A Block For Recording

    TKM-359CE OM To return to the «Memory» window, click the or “Ok” button image and click To exit the «Memory» window in the menu, press the button. Figure 16 Figure 17 2.16.3 SELECTION OF A BLOCK FOR RECORDING To choose a data block for recording measurement results, navigate to the “Memory”...

  • Page 44: Viewing Block Data

    TKM-359CE OM NOTE: Alternatively, block selection can also be performed through the block’s menu. In the «Memory» window, use the buttons, select “Menu” button image and press . The block menu will appear on the display. Managing actions within the block menu are identical to those in the main menu of the hardness tester.

  • Page 45: Clearing The Block

    TKM-359CE OM Set the threshold values via the block menu item <DATA PROCESSING> <LIMITS>. Adjust the chart’s threshold values through the block menu item <DATA PROCESSING> <FIGURE>. Below the chart, you will find the statistical results for this block. To return to the menu, press the button Figure 19 2.16.7 CLEARING THE BLOCK...

  • Page 46: Hardness Tester Shutdown

    TKM-359CE OM To recharge the battery, connect the hardness tester to a charger or a USB port on a computer using a USB cable. While charging, the battery icon on the display will periodically fill with colour. ATTENTION! Do not leave the device unattended during the charging.

  • Page 47: Safety Measures

    TKM-359CE OM Avoid sharp fluctuations in air temperature and relative humidity to prevent dew formation in the storage area. 4.3. If the storage period exceeds two months, the batteries should be removed from the electronic unit. 5. SAFETY MEASURES 5.1 The hardness tester is a technically sophisticated device that requires careful handling.
  • Page 48 TKM-359CE OM 7.1 The manufacturer hereby guarantees that the hardness tester complies with the requirements, “The Hardness Testers: Portable, Ultra- sonic, Model ТКМ-359CE,” for the entire warranty period. The warranty period for the hardness tester is 24 months from the date of purchase (up to a maximum of 30 months from the date of...

  • Page 49: Acceptance Certificate

    TKM-359CE OM 8. ACCEPTANCE CERTIFICATE The hardness tester ТКМ-359CE, serial number ________, complies with the requirements and is certified as fit for operation. Date of issue: Person in charge for acceptance: _____ _______________202____ ____________________/____________ Stamp Date of sale *: Supplier:...
  • Page 50 TKM-359CE OM NPP Mashproject LLC Phone: +7 (812) 337-55-47 Address: Vatutina street, 17 letter K, Saint-Petersburg, 195009, Russia https://mashproject-ndt.com mail@mashproject.ru...

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