DACE OMEGA-HB Instruction Manual

Brinell hardness tester

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3601 E. 34th St. Tucson, AZ 85713 USA Tel. +1-520-882-6598 Fax +1-520-882-6599 email: pace@metallographic.com

Equipment type

Model

Electrical Requirements

Frequency

Manual Revision Date

WARNINGS

Please read the instructions carefully before turning on the machine.

Supplying the wrong voltage will cause severe damage to the electrical system.

Do not disassemble.

VERSION 1.0

Brinell Hardness Tester

OMEGA-HB

110 Volts (Single-phase)

50/60 Hz

April 24, 2022

OMEGA-HB Brinell

Hardness Tester

NSTRUCTION

Web: https//www.metallographic.com

ANUAL

Table of Contents

Summary of Contents for DACE OMEGA-HB

Page 1 OMEGA-HB Brinell Hardness Tester - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ▲...
Page 3: Table Of Contents
CONTENTS Section 1: Warranty ....................... 5 Section 2: Technical Specifications ..................7 Section 3: Unpacking, Shipping, and Installation ..............10 3.1 Operational Conditions ....................... 10 3.1 Unpacking When moving the box, lift from the bottom using appropriate lifting techniques..........................10 3.3 Installation ...........................
Page 4 Section 9: Maintenance ...................... 28 9.1 General ..........................28 9.2 Adjustment of the Tester ....................28 9.3 Special Attentions ....................... 29 9.4. Working Principle of the Electric Parts ................30 10. Troubleshooting ......................32...
Page 5: Section 1: Warranty
SECTION 1: WARRANTY Terms and Conditions applying to all PACE Technologies Products 1. LIMITED WARRANTY AND DISCLAIMER: PACE Technologies Products are warranted for two years from the purchase date to be free from defects in material and workmanship under correct use, normal operating conditions, and proper application.
Page 6 4. ACCEPTANCE: Customer shall inspect the Products promptly upon receipt of delivery. Unless customer objects in writing within thirty (30) business days thereafter, customer shall be deemed to have accepted the Products. All claims for damages, errors, or shortage in Products delivered shall be made by Customer in writing within such five (5) business day period.
Page 7: Section 2: Technical Specifications
SECTION 2: TECHNICAL SPECIFICATIONS The OMEGA-HB Brinell hardness tester is a ball indenter designed to evaluate metallographic specimen hardness. The OMEGA-HB Brinell hardness tester uses a load-cell to apply loads ranging from 62.5 kg to 3000 kg. Electrical Specifications: 110V/220V Single Phase 62.5 kg (612.9 N)
Page 8 Determining the Correct Force: To determine the correct for Brinell testing the indentation diamond should be in the range of 0.25 to 0.6 times the ball diameter (see chart below). The maximum accuracy of the measurement is achieved when the diameter of the indent is 0.37 times the diameter of the ball indenter.
Page 9 Correspondent relations among scale, indenter and test force: Diameter of Indenter Test Force Hardness symbol N(kg) HBW 10/3000 29420(3000) HBW 10/1500 14710(1500) HBW 10/1000 9807(1000) HBW 10/500 4903(500) HBW 10/250 2452(250) HBW 10/100 980.7(100) HBW 5/750 7355(750) HBW 5/125 1226(125) HBW 2.5/187.5 1839(187.5) HBW 2.5/62.5...
Page 10: Section 3: Unpacking, Shipping, And Installation
Install unit carefully! Improper installation voids warranty. 3.3.1 TABLE LOCATION Installation of the OMEGA-HB should be on a flat sturdy surface, with easy access to electrical connections. For maximum height adjustment it is recommended that a 90 mm hole be drilled in the supporting table as per the above diagram.
Page 11: Install Leveling Feet
Upper Panel Indenter Lifting screw Tightening screw Switch Testing Power cord Rotating wheel The OMEGA-HB Brinell hardness testee surface. 3.3.2 INSTALL LEVELING FEET Attach four leveling feet and use bubble level on anvil to level unit 3.3.3 LEVELING UNIT Place bubble level on stage and adjust feet height to level the unit.
Page 12: Lever Positioning
3.3.5 LEVER POSITIONING Check the knife support to ensure that knife blade or “V” is positioned so it is resting in the groove of the support bar. If the blade is not being supported on the cushion (caused by severe shaking and vibration during transport), push down the main lever by hand and slide the blade into the groove (see image below).
Page 13: Section 4: Control Board And Its Functions
Section 4: Control Board and Its Functions Red and green double color LED Display window: Display window: 4.1 The panel board function includes six input keys and displays loading, dwell and unloading three statuses (see Fig.5). 4.2 An LED shows the present state of operation, such as “LOADING”, “DWELL” and “UNLOADING”...
Page 14: Section 5. Safety Guidelines
This symbol represents special safety precautions and warnings for the machine. Pay careful attention to this instruction manual and the recommended safety guidelines. This is essential for the safe operation of the OMEGA-HB Brinell hardness tester Turning on the machine when the voltage switch direction does not match the voltage...
Page 15: Start-Up And Operation
6. START-UP AND OPERATION 6.1 Preparatory work 6.1.1 The surface of the specimen must be clean. Remove dirt, corrosion or oxide coatings and avoid making the indent into any imperfections such as pits or porosity in the surface. 6.1.2 The minimum thickness of the specimen should be >10 times the depth of the indentation.
Page 16 6.2.5 When the instrument makes an audible beep, stop rotating the wheel and the instrument will automatically apply the test force. If the initial manual force applied is too high, the instrument will continuously beep and will not proceed. In this case, lower the anvil table and select a new location for the hardness test point and repeat the preloading procedure.
Page 17 1.67 2.04 2.46 1.17 2.92 1.38 3.43 1.84 2.38 2.68 3.34 4.08 4.48 4.91 5.36 5.83 6.33 6.86 7.42 6.2.8 The hardness test should be uniformly distributed on the specimen. The distance between two adjacent indentation’s centers should be not less than 3 times the diameter of the indentation;...
Page 18 6.2.10 The instrument uses and electronic loop control system; it can dynamically reflect the real changes of the test force. During the dwell time cycle, the display window “test force” constantly shows the instantaneous force value. When the indenter gradually presses into the specimen the force value decreases.
Page 19: Section 7: Optical Manual Microscope
SECTION 7: OPTICAL MANUAL MICROSCOPE 7.1 Eyepiece Components For manual Brinell testers a small 20X reading microscope is used to measure the size of the indent. Eyepiece Eye guard Lens barrel screw Reading drum wheel Objective Long lens barrel Lens barrel base 7.2 TECHNICAL SPECIFICATIONS MICROSCOPE 7.2.1 Magnification of the reading microscope: 7.2.2 Minimum division value of the drum wheel:...
Page 20: Usage Of The Reading Microscope
7.3 Usage of the reading microscope 7.3.1 There are 100 grid lines and numbers around the reading drum wheel, each grid for 0.005 7.3.2 The eyepiece has two blocks of glass, one with 0~8 digits, digital interval for 1 mm and the other with a movable line.
Page 21: Maintenance Of The Reading Microscope
7.4 Maintenance of the reading microscope 7.4.1 The precision of the reading microscope has been adjusted at the factory. Do not disassemble and reassemble. 7.4.2 The reading microscope should be stored in a dust free, dry and noncorrosive environment. 7.4.3 If the surface of the reading microscope lens is dirty, it can be wiped by soft cotton and lens paper;...
Page 22: Section 8. Brinell Testing Basics
SECTION 8. BRINELL TESTING BASICS Hardness Testing provides useful information, which can be correlated to tensile strength, wear resistance, ductility, and other physical characteristics of the material. Hardness testing is therefore useful for monitoring quality control and for aiding in the materials selection process. BRINELL HARDNESS (ASTM E10, ISO 6506) To determine a Brinell hardness number (BHN), a 10 mm diameter steel ball is typically used as an indenter with a 3,000 kgf (29 kN) force.
Page 23: Technical Data For Hardness Evaluation
The BHN can be converted into the ultimate tensile strength (UTS), although the relationship is dependent on the material, and therefore determined empirically. The relationship is based on Meyer's index (n) from Meyer's law. If Meyer's index is less than 2.2 then the ratio of UTS to BHN is 0.36.
Page 24 Table for Selection Value 0.102F/D Material Ball Hardness 0.102F/D <140 Steel and Cast Iron ≥ 140 <35 Copper and Cupric Alloys 35~130 >130 Light Metals and Their Alloys 35~80 5, 10 >80 8.1.2 For the following materials there are standard Brinell tests: Steel: Typically HBW x | 3000 (x=ball diameter).
Page 25 8.1.3 Nomenclature When quoting a Brinell hardness number (BHN or more commonly HB), the conditions of the test used to obtain the number must be specified. The standard format for specifying tests can be seen in the example "HBW 10/3000". HBW - tungsten carbide ball indenter HB or HBS - hardened steel ball.
Page 26 8.1.7 Surface preparation More consistent results are obtained with better surface finishes, however, as a minimum, 600 grit finish is recommended. Also, it is suggested that any surface scale, rust, contamination of other debris should be removed from the surface before testing. 8.1.8 Minimum specimen thickness In general, the specimen thickness should be >8-10 X the depth of the indent.
Page 27 5.60 6.14 6.70 7.29 7.91 8.58 9.28 10.00...
Page 28: Section 9: Maintenance
SECTION 9: MAINTENANCE 9.1 General 9.1.1 Apply alight costing of oil to the lifting screw, anvil and other moving surfaces of the tester. 9.1.2 Turn off power after finishing. 9.1.3 Turn the hand-wheel in counter-clockwise direction to lower it away from indenter. 9.1.4 When the tester is not in use cover with a dust cover.
Page 29: Special Attentions
9.3 Special Attentions 9.3.1 Do not tamper with the installation position of electronic components, switches and sockets etc. This may void the warranty. 9.3.2 The turntable (anvil) should never be rotated during the test cycle, otherwise the apparatus may be damaged. Only rotate the turntable after the beep sounds indicating the end of test cycle.
Page 30: Working Principle Of The Electric Parts
There are 10 test loads (62.5, 100, 125, 87.5, 250, 500, 750, 1000, 1500, and 3000 kgf) available for use on OMEGA-HB Digital Ball Hardness Tester, the lower 5 load (62.5～250 kgf) have a resolution of 0.1kgf, and the upper 5 loads (500～3000 kgf) have a resolution of 1 kgf, to ensure the test loading force is more stable and reliable, The tester uses a Japan made DMF-50081 320×240 LCD as display, user may choose desirable...
Page 31 to B switch during the loading period, .the switch will stop the motor and cause it to rotate in the counter direction, thus providing the automatic unloading and return of the lever to its original position...
Page 32: Troubleshooting
10. TROUBLESHOOTING Phenomenon Possible Causes Method Used Screen does not 1. No power 1. Check the power cable. turn on 2. The fuse is blown. 2. Change the fuse. When the tester is When the tester is turned on, wait until The instrument is not in on, the keys do not the instrument returns to the working...