Phase II+ 900-398 Manuale utente

Tech Support

MacroVickersModelNo.900‐398

HardnessTester

99 Washington Street

Melrose, MA 02176

Phone 781-665-1400

Toll Free 1-800-517-8431

Visit us at www.TestEquipmentDepot.com

Tech Support

MacroVickersModelNo.900‐398

HardnessTester

Contents

1. Introduction

2. Main Technical Specifications

3. Installation and Regulation of the Instrument

3.1 Operational conditions

3.2 Unpacking and installation

3.3 Introduction to the operating board and its function keys

4. Usage of the Instrument

5. Precautions of the Instrument

6. The Packing List

Tech Support

MacroVickersModelNo.900‐398

HardnessTester

1 Introduction

OuradvancedMacroVickershardnesstester900‐398isastate‐of‐the‐art,precisetestingsystemsuitablefor

hardnessanalysisofmetallicspecimensinmetallographylaboratoriesorproductionenvironments.

Designedfortheaccuratehardnesstestingofsmallprecisionparts,thinmaterials,casehardenedlayersandall

sortsofsteelcomponents.ThePhaseII900‐398isourmacro‐vickershardnesstester,coveringtheloadrange

from1kgto50kg,withdigitaltechnology.ConformingtoASTME‐384/92vickershardnesstestersstandards,the

900‐398digitalvickershardnesstesterwillofferunmatchedrepeatability.Aperfectruggedperformersuitedfor

anyenvironment,thePhaseIIvickershardnesstestersareofferedwitha5yearwarrantyandfreelifetime

technicalsupport.

The900‐398VickersHardnessTesterisengineeredtoproduceaclearindentationandamoreprecise

measurement.Bymeansofaloadcell,closedcircuitsystemforcontrol,theCPUcontrolstestingforceto

load/dwell/unload,allowingforthehighestdegreeofaccuracy.ThelargeLCDshowsthemeasuringmethods,the

testingforce,theindentationlength,hardnessvalue,thedwelltimeofthetestingforceaswellasthenumberof

themeasurementonitsscreen.Allinformationsuchasdiagonallineslengthofindentation,hardnessvalues,data

statisticsandhardnessconversionscanbedisplayedontheLCD. 

Thetestercanbeadaptedwithaccdcameraforoperationanddatacontrolviapc.

2 MainTechnicalSpecifications

Testforces 9.807N(1kg),19.61N(2kg),24.52N(2.5kg)29.42N(3kg),   49.03N(5kg),

98.07N(10kg) 196.1N(20kg),  294.2N(30kg),  490.3N(50kg)

TestForceApplicationMethod: Automaticloadingandunloading

TestingResults:Automatic

AmplificationoftheMicroscope: *Both10xand20xcanbeusedformeasurement

Objective10x 20x

Measuringeyepiece10x 10x

TotalAmplification100x 200x

ResolutionRate0.25µm 0.125µm

Dwelltimeofthetestforce: 0~60s(5secondasaunit)

Max.heightofthespecimen: 170mm

MaxDepthofspecimen:130mm

Weight:110lbs(50kg)  

LightSource: 12V–Adjustable15‐20watt

Powersource: AC110V/50~60Hz

Auto‐PowerSaver Shutsofflightsourceafter10minutes

Overalldimension(L×W×H):  (530×225×630)mm

Tech Support

MacroVickersModelNo.900‐398

HardnessTester

3Unpacking,OperationalConditionsandInstallation

UnpackingandInstallation

Cutthebeltonpackingcrate;removetheanti‐shockcushionandremovethe

instrumentandtheaccessorieskitfromthecrate.

Place the instrument on a solid working table. (for the dimensions of the

workingspace,seeFig1)(580mm)

DoNotDiscardShippingCrateasThisMay

beNeededforFutureTransportation.

GeneralSafetyInstructions

1. Neveruseclamps,straps,anyothertoolingorequipmenttomountspecimento

thetesteranvil.

2. Alwaysusetheproperanvilsupplied.

3. Besuretouseproperindentorandweightformaterialandhardnesstobetested.

HardnessTesterMaintenance

1. Consultoperationinstructionsforspecificmaintainingandadjustingprocedures.

2. Keepthetoolcleanforbestresults.

3. Removeadjustingtoolsandwrenches.Formhabitofcheckingthatadjustingtools

areremovedbeforeusingmachine.

4. Keepallpartsinworkingorder.Checktodeterminethatthepartswilloperate

properlyandperformtheirintendedfunction.

5. Checkfordamagedparts.Checkforalignment,binding,breakage,mountingand

anyotherconditionthatmayaffecttool'soperation.

6. Partthatisdamagedshouldbeproperlyrepairedorreplaced.Donotperform

makeshiftrepairs.(Usethepartslistprovidedtoorderreplacementparts.)

250



(450)

Fig 1

Tech Support

MacroVickersModelNo.900‐398

HardnessTester

Tech Support

MacroVickersModelNo.900‐398

HardnessTester

Vickers Hardness Test

The Vickers hardness test method consists of indenting the test material with a diamond indenter, in the form of a

right pyramid with a square base and an angle of 136 degrees between opposite faces subjected to a load of 1 to 100

kgf. The full load is normally applied for 10 to 15 seconds. The two diagonals of the indentation left in the surface

of the material after removal of the load are measured using a microscope and their average calculated. The area of

the sloping surface of the indentation is calculated. The Vickers hardness is the quotient obtained by dividing the

kgf load by the square mm area of indentation.

F= Load in kgf

d = Arithmetic mean of the two diagonals, d1 and d2 in mm

HV = Vickers hardness

When the mean diagonal of the indentation has been determined the Vickers hardness may be calculated from the

formula, but is more convenient to use conversion tables. The Vickers hardness should be reported like 800 HV/10,

which means a Vickers hardness of 800, was obtained using a 10 kgf force. Several different loading settings give

practically identical hardness numbers on uniform material, which is much better than the arbitrary changing of

scale with the other hardness testing methods. The advantages of the Vickers hardness test are that extremely

accurate readings can be taken, and just one type of indenter is used for all types of metals and surface treatments.

Although thoroughly adaptable and very precise for testing the softest and hardest of materials, under varying loads,

the Vickers machine is a floor standing unit that is more expensive than the Brinell or Rockwell machines.

Tech Support

MacroVickersModelNo.900‐398

HardnessTester

Operating Conditions:

The 900-398 Macro Vickers Hardness Tester is a precise yet sensitive instrument

that should be handled with care. Please be sure to mount on a sturdy bench in a

clean temperature controlled room for best results. This instrument should be

perfectly level before performing any tests.

SetUp–Installation:

Takeoutthe4LevelingFeet(11)outoftheaccessorieskitandscrewthemin

theholesonthebaseoftheinstrument.Unpackthegauzebandwrapped on

theUpandDownLeadScrew(7)andHandWheel(13)(Fig.2).

Rotate the hand wheel(13) to make the indentor(4) face the front of the

machineandthengentlyremovetheanti‐rust/shockpaperontheindenter

withbothhands.Cleantheindentergentlywithrubbingalcohol.

Removethedustprotectorfromtheeyepiecetubeandthenremove the

eyepiece(2)fromtheaccessorykitandplaceintotheeyepiecetube.Insertthe

5‐holeplugintotheportontherightsideofthemachine.

Set‐upcont’

Take out flat testing anvil(5) and place the shaft of the anvil inside the hole of the elevation

screw(7). Snug with screws(6) and wipe grease/oil from anvil.

Remove the bubble leveling gauge from the accessory kit and place it on top of the anvil.

Adjust the 4-leveling feet until the desired level is reached.

Tech Support

MacroVickersModelNo.900‐398

HardnessTester

KEYPAD FUNCTIONS: (Fig.5).

TIME/+Timeaddingkey.5secondinterval/pressAlsousedfordatesetting.

TIME/‐:Timereductionkey.5secondinterval/press.Alsousedfordatesetting.

SPEC: Multifunctionkey.1)Mustpresstouse“lowershiftkeys”onkeypad.

2)Presstoobtaindateandtime

FORCE/+:IncreaseTestForce

FORCE/‐:DecreaseTestForce

.

LIGHT+/DEL:1)Increaselightsource

2) Deletepresentresultondisplay(mustpressSPECkeyfirsttomakeDELfunction)

LIGHT‐/DPRT:1)Decreaselightsource

2) PrintOutputkey(mustpressSPECkeyfirsttomakePRTfunction)

CLR‐F/CLR‐D:1)CLR‐FistheZerosettingkeyforthetestforcevalueifdisplayed

2) CLR‐DistheZerosettingkeyforthegraduatedlinesintheeyepiece.

(SetzerotoD1andD2)(mustpressSPECkeyfirsttomakeCLR‐Dfunction)

START:1)Testforceapplicationkey,automaticloading,dwell,unloading.

2) EmergencyStopkey.Pressthiskeytoimmediatelystoptestandreverseitselfbacktothe

originalstartposition.

Tech Support

MacroVickersModelNo.900‐398

HardnessTester

3.1 Usage of the Instrument

3.1.1 Switch the power source on. The light source and the LCD screen are both lit up at

the same time. At this point, the LCD screen displays as follows:

D1/D2：Diagonal length of indention；HV：Vickers hardness value；T：Dwell time；

N：Numbers of measurements；F：Testing force value；

3.1.2 Once the working screen appears, you can revise the dwell time, testing force value and luminosity of light source,

etc according to operator’s requirement.

3.1.3 Rotate the protecting cover of the indenter to make the 20╳ objective face the front of the instrument. (This

instrument is equipped with a positioning device, you will feel it click into a position socket when you rotate

the protecting cover. The general amplification is 200╳

3.1.4 Place the standard block or the specimen on the testing table and then rotate the hand wheel to raise the table. When

the block or the specimen comes into the distance of 3~4 mm ( 20╳ objective) under the objective, begin

observing the view through the eyepiece. At this point , in the center of the vision field of the eyepiece appears

a bright spot , which is alerting you that you are very close to the focusing plane. At this time raise the testing

table up slowly until the block or specimen surface forms a clear image in the micro eyepiece, which indicates

the focusing operation is completed. (The micro eyepiece, the objective and the working piece are in the

focusing state.)

3.1.5 The luminosity of the light source in the vision field can be regulated through the keys “LIGHT+” or “LIGHT-” on

the operational board.

3.1.6 If there is a need to have a large vision field on the block or on the specimen , just shift the 10╳ objective in the

frontal direction of the instrument . At this time, the general amplification is 100╳ . Both the 10╳ objective and

the 20╳objective can be used for the measurement.

D1: HV:

D2: T:15 N:00

0.00Kgf F:294.2N

WELCOME USE

×××-××

After 5 seconds,

the screen display

Dynamic valve of

testing force

Tech Support

MacroVickersModelNo.900‐398

HardnessTester

NOTE: 1. When toggling between the objectives 10╳and 20╳ , there might be a

slight change in the vision field. Just adjust slightly the up-and-down lead-screw until the focusing plane is clear.

2. When testing indentation size covers over 60% of the vision field, the hardness value for this

measurement is erroneous

You can have 2 choices:

a) Reduce the testing force;

b) When it is stipulated that the testing force can’t be changed in the

technical file, you must choose the objective with small rate amplification. This is the function

that both objectives can measure.

3.1.7 After the focusing operation is finished, turn the indenter to the front of the

instrument .At this point,the distance between the tip of the indenter and the plane

of the specimen is about 0.4～0.5 mm. When an irregular-shaped specimen is to be

tested, take care not to damage the indenter. The indentor must be perpendicular to

the surface at all times.

3.1.8 According to the requirements of the test, set the dwell time of the test force with

the keys on the operating board. Each push of the button accounts for 5 seconds,

with the key “TIME+” adding time and the key “TIME-” reducing time.

3.1.9 Press the key “START” on the operating board and apply the test force; at this point

(LOADING) LED is lit.

3.1.10 After the test force is applied, DWELL LED lights up. At this time the LCD screen

shows the dwell countdown of the time selected. When the dwell time is up, the test

force UNLOADING LED lights up. After test force UNLOAD LED lights out,

shift the objective selected to front of instrument.

NOTE: When the UNLOAD LED is still on, do not turn the protecting cover of the

indenter; otherwise it would cause damage to the instrument. After pressing

the “START” Key, if you find the objective is in front of instrument instead

of the penetrator, Please be patient to wait until the machine performs the

test cycle. DO NOT ROTATE DURING TEST. Serious damage can occur

3.4.11 Rotate the turntable counter-clockwise to place the 20╳ objective in front of the main body. Turn the drum

wheel on both left and right side of micro eyepiece, so that the operator could see the two graduated lines move

closely as shown in Fig 6. Continue turning eyepiece until the inner sides of graduated lines reach critical state

with no space between them to allow the light to penetrate as shown in Fig 7. Now press the SPEC key and

then press “CLR-D” key to clear the zero, at this point, it has finished to set zero for the eyepiece, the values of

D1 and D2 will show 0.00 on the LCD screen.

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