Shore hardness tester|rubber hardness tester|Plastic hardness teseter | foam hardness tester|Leeb Hardness Tester|Integrative Hardness Tester|hardness analyser| hardness meter|

1.1 Typical Applications..................................................1

1.2 Testing Features.......................................................1

1.3 Technical Specifications............................................1

1.4 Measuring and Converting Ranges.............................2

1.5 Configuration...........................................................2

2.1 Structure Feature......................................................2

2.2 Leeb Hardness Testing Principle................................4

2.3 Symbols and illustrations of hardness scale................4

2.4 Symbols of materials…………………………...........……5

3.1 Weight Requirements ...............................................5

3.2 Roughness Requirements................................. . . . . ...6

3.3 Cleanliness Requirements........................................6

3.4 Stability Requirements..............................................6

3.5 Samples with curved surfaces ...................................7

3.6 Test Samples Properties...........................................7

4.1 Power On/Off...........................................................7

4.2 Setting your Impact Direction................................ . . ..7

4.3 Selecting a material..................................................8

4.4 Choosing a hardness scale........................................8

4.5 Average Times Setting..............................................8

4.6 Measuring Procedure...............................................8

4.7 Data Memorizing......................................................10

4.8 Memory Recall.........................................................10

4.9 Delete Data in Memory..............................................10

4.10 Download to PC.....................................................10

4.11 Auto Power Off............................................... . . ......10

4.12 Battery Replacement..............................................10

Quick Start Guide

To quickly configure the tester and start taking

readings. Please follow the procedures below.

1. Preparation for work pieces to be tested

Thick, heavy, and solid workpieces are preferred for

testing whenever possible. the surface must be polished

tested should be fixed to a bearing or support to avoid

bending, deformation, and displacement during testing.

2. Operation of the tester

2.1 Fit batteries

Install batteries paying careful attention to polarity.

2.2 Power on

2.4 Select a material code See Part 4.3

2.5 Select a hardness scale See part 4.4

2.6 Place the tester onto the surface to be measured

2.7 Load

2.8 Release

1. Never try to let tester strike any tungsten steel or harder

materials. Otherwise the impact body will be damaged

forever.

2. Under no circumstances should you press the release

button if the tester was not against the work piece.

Otherwise the support ring would be loose easily.

1.1 Typical Applications

* Die cavity of molds

* Inspection of bearing and other mass produced parts on a

production line

* Failure analysis of pressure vessel, steam generator and

other equipment

* Inspection of installed machinery, permanent parts of

assembled systems and heavy work pieces.

* Testing surface of a small hollow space

* Material identification in the warehouse of metallic materials

* Rapid testing in large range and multi-measuring areas for

large-scale work piece

1.2 Testing Features

* Palm size for narrow space.

* Test at any angle, even upside down.

* Direct display of hardness scales HRB, HRC, HV, HB, HS,

HL.

* Large memory could store 250 groups including single

measured value, impact direction, material and hardness

scale etc.

* User recalibration function allowed.

* Can communicate with PC computer for statistics and

printing by the optional cable.

* Manual or automatic shut down.

* Low battery indication.

1.3 Technical Specifications

Display: 12.5mm LCD with back light

Accuracy: Display error ±0.8% at LD=900

Measuring range: 200-900L

Conversion: HL-HRC-HRB-HB-HV-HSD

Materials: 9 different common materials

With RS232C interface

Memory: 250 data can be stored and re-readable

Impact device: D Will handle the majority of hardness testing

applications. Weight: 75g

Power supply: 2x1.5V AAA size battery

Dimension: 146×65×36mm

Weight: 130g (not including batteries)

1

1 Calibration mode

2 Measuring value

3 Average times set

5 Impact type

6 Measuring state

7 Browsing state

8 Average Symbol

9 Measuring symbol

10 Battery indicator

11 Hardness scale

12 Material

13 Direction

14 Number of memorized data

2.2 Leeb Hardness Testing Principle

An impact body with a spherical test tip made of tungsten carbide is

propelled against the sample surface by a spring force and then

rebounds back. At a distance of 1mm from the sample surface, the

impact and rebound velocity of the impact body are measured by the

following method: A permanent magnet embedded in the impact body,

when passing through the coil in its coil holder, induces in the coil an

electric voltage proportional to the velocities of the magnet. Leeb

hardness is expressed by the following formula:

Where: HL is Leeb Hardness

The voltage characteristic of output signal, when the impact body

passes through the induction coil is illustrated in the following figure:

A Leeb’s Hardness Tester measures the hardness of sample material in

terms of Hardness Leeb (HL), which can be converted into other

Hardness units (Rockwell B and C, Vicker, Brinell and Shore D).

When measuring the hardness of a sample material using the traditional

static hardness testing method, a change of applied pressure will result

in a change in the hardness reading. This will also happen during a

Leeb’s Hardness test when you change the impact device. In measuring

the hardness of the same test sample with different impact devices, the

Leeb’s hardness values obtained will vary.

2.3 Symbols and illustrations of hardness scale

Selection of the workpiece to be tested and preparation of its surface

prior to testing will help insure accuracy. Magnetism of the sample itself

should be avoided. The surface temperature of sample should be less

than 120 °C.

3.1 Weight Requirement

To achieve correct test results, select thick, heavy, and solid workpieces

for testing whenever possible. The surface area where the impact body

strikes should have an even hardness.

A solid workpiece that weighs more than 11lbs. (5Kg) can be tested on

directly with the this hardness testers. Support is not necessary for

heavy sample.

A workpiece that weighs 6 to 11lbs. (3 to 5Kg) should be fixed to a

bearing or support weighing over 11lbs (5kg) to avoid bending,

deformation, and displacement during testing.

A workpiece that weighs less than 4 lbs. (2Kg) should be secured to a

workbench or a stable support. The surface between the workpiece and

the support must be hard, clean, and smooth. To secure the workpiece,

apply petroleum jelly or yellow grease to the adjoining surfaces of the

workpiece and support, press the workpiece firmly onto the support, and

eliminate any air between the two surfaces by moving the workpiece

back and forth.

Proper coupling requires a little experience. Insufficiently coupled

samples produce large variations of individual measurements, HLvalues

which are too low and the operation is characterized by a rattling

noise upon impact of the test tip.

For the coupling operation, the following prerequisites must be fulfilled:

* The contact surface of the sample and the surface of the base

plate must be flat, plane parallel and ground.

* The direction of the test impact must be perpendicular to the coupled

5

surface.

* Minimum thickness of the sample for coupling (3mm).

3.2 Roughness Requirement

To eliminate measurement errors which could result from the roughness

of the test surface, the surface should be polished so that a metallic

2μm. Note that the rougher the surface of the workpiece, the lower the

hardness test results.

3.3 Cleanliness Requirements

To ensure test accuracy, the test surface of the workpiece must be clean

and free of any oil stains, rust, and remains from electro-plating or paint.

3.4 Stability Requirements

To avoid displacement during testing, the workpiece should be firmly

fixed with its test surface perpendicular to the impact direction. Due to

the impact of the Impact Body, the test area may deform or vibrate, even

for some workpieces with suitable weight and thickness.

The tested hardness may be lower than normal. This is especially true

for workpieces such as a large plate, a long bar or a rod, and workpieces

with a curved surface. Some testing recommendations for these

workpieces are shown in figure 3.1

3.5 Samples with Curved Surfaces

The larger the curvature of the workpiece’s surface, the easier the

testing operation. Under normal conditions, testing can be done directly

with the standard support ring to a curvature with radius of 1 3/16”

(30mm) or longer.

For a workpiece with a radius of less than 1 3/16” (30mm), a special

support ring should be used for testing.

4.1 Power on/off

working mode.

* The LCD will display the same settings that were previously set. If the

display meets your current testing requirements, you can start the test

immediately. If not, you can enter your required settings using the

keypad.

seconds while OFF shows on the display.

4.2 Setting your Impact Direction

direction.

4.3 Selecting a material

key to scroll down the list until the desired material is reached.

4.4 Choosing a hardness scale

to scroll down the list until the desired hardness scale is reached.

4.5 Average Times Setting

press key or key in turn to select the average times from

finally to exit from the operation

This function allows you to view the average of the amount of tests you

entered.

Example: If you chose “3”. The tester will show the average after 3

consecutive tests.

4.6 Measuring Procedure

Use standard test block to check your hardness tester prior to a

hardness test.

4.6.1 Loading

Push the Loading Tube towards the support ring to lock the impact body.

Then, while still holding on to the loading tube, slowly return it to its

original position.

4.6.2 Placement

Holding the tester between your thumb and index finger, hold the tester

against the Work piece. Please note: the impact device must be firmly

against the surface and the impact direction should be vertical to the

testing surface or you may get unsatisfied value.

4.6.3 Releasing

Press the release button lightly on top of the tester and take

measurement. The measuring value will be displayed on LCD. To be sure

that while releasing the triggering button, the work piece, the impact

device and the impact body are all stable and the starting force coincides

with the axis of the impact device.

If the test results are outside the ranges listed in Table 1.1, the screen

will display E.

Each measure area of the sample usually needs 3 to 5 times of testing

operation. The result data dispersion should not more than mean

value±15HL.

The distance between any two impact points or from the center of any

impact point to the edge of testing sample should conform to the

regulation of Table 4.1

If want accurate conversion from the Leeb hardness value to other

hardness value, Just operate as per procedures listed in part 4.4