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BAQ alphaDUR mini Скачать руководство пользователя страница 23

CONVERSION OF HARDNESS VALUES

7 Conversion of hardness values

The

alphaDUR mini

can convert hardness values to another hardness scale.

The tables DIN EN ISO 18265 - Feb.2014 and ASTM E140 - 12b (2019) are

used for the conversion. These tables partly contain values, which are outside

of the definition area of the standardized hardness testing method, but may be

used as approximate values. In the

alphaDUR mini

, these approximate values

are considered in the conversion and shown in red on the display.

When applying revaluations, it should be noted that there is no universal

conversion relation. That is why the conversions should only be used within a

material group. The impact of different indenters and test loads should always

be considered. The information given in the standards on the applicability,

inaccuracy and the difficulties when converting hardness values should be

taken into account. Before using the conversion it should be checked if all

requirements for the conversion are met.

The

alphaDUR mini

determines the Vickers hardness. In contrast to the

classical method according to DIN EN ISO 6507-1, the measurement is done

while the test load is applied. Still the results of the UCI-Vickers and the

Standard-Vickers are comparable to the classical method, as long as the elastic

part of the deformation is negligible compared to the plastic part. This applies to

metals and e.g. ceramics.

To change the hardness scale, select the menu item

Measuring parameter /

Edit / Hardness scale

(see chapter 6.2.1) or press the SCALE key in the

measuring window. The SCALE KEY is deactivated if the measured data

storage is activated.

The ranges of validity for hardness conversion are shown in chapter 15

Appendix 1: Hardness conversion validity ranges

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Содержание alphaDUR mini

Страница 1: ...alphaDUR mini Manual Version 1 5...

Страница 2: ......

Страница 3: ...Measuring procedure 15 5 4 Measuring window 15 5 4 1 Key assignment of the measuring window 17 5 5 Statistics 17 5 5 1 Display of statistics 17 5 6 Instant printout 19 6 Measuring parameter 20 6 1 Des...

Страница 4: ...34 10 3 Date 34 10 4 Configuration 34 10 4 1 Date format 34 10 4 2 Key SCALE 34 10 4 3 Key MAT 35 10 4 4 Query whether the values should be saved in a series 35 10 4 5 Query whether the values should...

Страница 5: ...Up to 100 000 readings including hardness date time and measuring parameter can be stored to the internal memory of the alphaDUR mini The readings are arranged in series of measurements A series of me...

Страница 6: ...notes Important notes and remarks 2 2 Text boxes Operating elements Explanations of functions and operating elements are framed in blue Entry fields Green fields describe user inputs and parameters In...

Страница 7: ...vertically 3 2 Probe handling The protective sleeve serves two purposes It protects the UCI rod against damages as distortion Furthermore during the measurements it functions as a mechanical stop for...

Страница 8: ...facilitate the pressing probe supports separately available can be screwed instead of the protective sleeve onto the probe These probe supports are available for flat and convex surfaces Especially f...

Страница 9: ...ens the main menu Cursor keys With these keys menu items are selected and the re quired values in input fields are set In drop down lists subordinate entries marked with a previous can be opened by pr...

Страница 10: ...arked menu item is selected Either a window or a sub menu are now opened Press ESC to return to the previous menu 4 4 Text entry When saving measurement data and measurement parameters entries must be...

Страница 11: ...ont of the input mark DEL Accepting text and closing text entry window ENTER Closing text entry windows and asking whether the text should be accepted ESC Focus on character area Selection of the char...

Страница 12: ...e cursor is positioned can be modified through pressing the cursor keys and A further digit for the input of larger values can be created by cursor The input is saved and completed with ENTER With ESC...

Страница 13: ...ccording to DIN standard As test loads become smaller these re quirements increase The surface must be free from oxides impurities and lubricants The surface roughness should not exceed 1 5 of the pen...

Страница 14: ...lastic Homogeneity As in optical Vickers hardness tests the indentations are quite small Therefore the homogeneity of the specimen can possibly influence the measurement results To achieve reproducibl...

Страница 15: ...before the protective sleeve touches the surface of the specimen Therefore vibrations caused by the protective sleeve hitting the surface will not influence the measurement result The measurement is...

Страница 16: ...f the definition range of the standardized hardness testing method but may be used as approximate values are displayed in red 16 Charge status display Displays the residual charge of the batteries Tim...

Страница 17: ...s the hardness scale If limits for the evaluation GOOD are specified they are automatically set to 0 In the system settings it can be determined whether the scale should be changed automatically to th...

Страница 18: ...red In this view it is possible to delete obviously incorrect values To delete a value the marker is set onto the corresponding value and then DEL must be pressed If the edit window is closed with ES...

Страница 19: ...bile printer is connected a consecutive printout can be made The measured data is then instantly printed The instant printout mode stays active when the measuring window is closed It must be explicitl...

Страница 20: ...re converted see chapter 7 In the measurement window the hardness scale can be switched with by pressing the key SCALE Rating These are the upper and lower limits for rating A signal of two short beep...

Страница 21: ...er to change a stored configuration it must first be loaded and stored again after the changes has been implemented 6 2 2 Saving measuring parameter The current measuring parameters can be stored in t...

Страница 22: ...a set is loaded in which a material is selected that is not valid in the current revaluation standard see chapter 7 and 8 the revaluation standard is automatically switched to the value corresponding...

Страница 23: ...dards on the applicability inaccuracy and the difficulties when converting hardness values should be taken into account Before using the conversion it should be checked if all requirements for the con...

Страница 24: ...N OF HARDNESS VALUES 7 1 Selection of the conversion standard to be used In the menu item Material calibration Conversion standard can be selected if the DIN EN ISO 18265 or the ASTM E140 should be ap...

Страница 25: ...tion When delivered there are already two material calibrations for steel in the alphaDUR mini stored These cannot be overwritten or deleted They only differ in the table that has been chosen Steel DI...

Страница 26: ...be not converted to a hardness scale other than HV 2 Afterwards the hardness scale in which the calibration should be made must be selected This corresponds to the hardness scale of the reference samp...

Страница 27: ...ation is satisfying it can be saved Now you have to decide if the new calibration shall replace an older one or if the calibration should be saved as a new one In the first case you have to select the...

Страница 28: ...uld be recorded e g during the quality inspection of many identical parts As soon as the set number of values for the subordinated measurement series is recorded the statistic is displayed After press...

Страница 29: ...cannot be changed while a series of measurements is taken The recording of the series is finished if the measuring window is closed You will then be asked if the hardness values should finally be save...

Страница 30: ...d to which the now taken values should be added The new readings are saved incl the current date and time The measuring parameter are automatically set to the settings of the selected serial measureme...

Страница 31: ...Only semicolons should be selected as the separator option when opening with a spreadsheet The USB flash drive should be formatted as MBR with FAT or FAT32 The included manual USB flash drive can be u...

Страница 32: ...ame Test load e g 30 Lower rating limit e g 0 Upper rating limit e g 0 Material section e g Standard Material name e g Steel DIN Conversion table e g DIN_ISO_18265_A1 Hardness scale e g HV Number of s...

Страница 33: ...Month Year Hour Minute 312 23 4 2020 10 51 reading 1 more readings 320 23 4 2020 10 51 reading n more subordinate single series more subordinate single series Single series name of subordinate single...

Страница 34: ...minute Press ENTER to save the time To cancel the input press ESC 10 3 Date Choose the menu item System Date to set the current date Press ENTER to save the current press ESC to cancel the input 10 4...

Страница 35: ...int values query you can determine if you want to be queried whether the data should be printed when you close the statistics window see 6 1 Statistics This happens if the statistics configuration is...

Страница 36: ...the default values 10 6 System information Select System Info from the menu to display the system information The version numbers of the software kernel and system will be shown If a probe is connecte...

Страница 37: ...due to the measuring method It should be no less than 15 mm Test blocks of lesser thickness e g 6 mm aren t suitable The edge length of the hardness test block must be at least 50 mm These special UC...

Страница 38: ...Vickers diamond penetrates the specimen the oscillation of the rod is damped This causes a shift f of the resonance frequency which can easily be measured The damping of the rod and the resulting shif...

Страница 39: ...he total area of contact proportional to d2 enters into the measurement and not only the diagonal d or a diameter Moreover the measurement results are independent from the subjective view of a single...

Страница 40: ...Hausm ll Pb Cd und Hg bezeichnet Inhaltsstoffe die oberhalb der gesetzlichen Werte liegen La l gislation exige des consommateurs le d p t des piles usag es dans un lieu de collecte appropri un point d...

Страница 41: ...itar las pilas viejas en un punto de recogida adecuado punto de venta centro de env o El contenedor de basura tachado significa la pilas no deben desecharse en la basura dom stica Pb Cd y Hg designan...

Страница 42: ...10 20 30 49 or 98 N depending on the UCI probe Measurement range Vickers HV 10 approx 3000 Conversion range see chapter 15 Uncertainty of measurement 2 to the value of the hardness test block Memory 1...

Страница 43: ...TECHNICAL DATA Depth 23 mm Probe Diameter 19 5 mm Length 175 mm Weights Device 320 g Probe 190 g 43...

Страница 44: ...40 3 HRD 940 HV 76 9 HRD 240 HV 19 9 HR45N 940 HV 75 4 HR45N Tempering steel tempered B2 210 HV 205 HB 650 HV 632 HB 210 HV 15 3 HRC 650 HV 57 5 HRC 210 HV 94 8 HRB 410 HV 113 6 HRB 210 HV 651 MPa 470...

Страница 45: ...4 HV 2 0 HRC 513 HV 50 0 HRC 77 HV 30 0 HRB 309 HV 106 HRB 119 HV 136 HK 382 HV 436 HK 77 HV 73 0 HRF 309 HV 116 5 HRF 112 HV 39 0 HRA 513 HV 75 5 HRA 112 HV 8 0 HRD 513 HV 63 0 HRD 171 HV 2 0 HR45N 5...

Страница 46: ...HV 100 HB 832 HV 739 HB 238 HV 20 0 HRC 940 HV 68 0 HRC 100 HV 55 0 HRB 234 HV 99 0 HRB 100 HV 112 HK 940 HV 920 HK 100 HV 88 2 HRF 137 HV 99 6 HRF 100 HV 37 2 HRA 940 HV 85 6 HRA 238 HV 40 1 HRD 940...

Страница 47: ...cluded 40 HV 42 8 HK 0 5 130 HV 133 8 HK 0 5 40 HV 40 2 HK 1 130 HV 138 7 HK 1 Alloyed White Irons 8 380 HV 357 HB 1000 HV 903 HB 380 HV 35 0 HRC 1000 HV 70 0 HRC Wrought Aluminum Products 9 44 HV 40...

Страница 48: ...orms with or without modification are permitted provided that the following conditions are met Redistributions of source code must retain the above copyright notice this list of conditions and the fol...

Страница 49: ...TO PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES LOSS OF USE DATA OR PROFITS OR BUSINESS INTERRUPTION HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY WHETHER IN CONTRACT STRICT LIABILITY OR TORT INCLUDIN...

Страница 50: ...BAQ GmbH Hermann Schlichting Stra e 14 38110 Braunschweig Germany Tel 49 5307 95102 0 Fax 49 5307 95102 20...

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