Sauter HMM User guide

Sauter GmbH

Tieringerstr. 11-15 D-72336 Balingen E-Mail: info@sauter.eu

Instruction Manual

MOBILE LEEB HARDNESS TESTER

Model: HMM

Table of contents

Caution

1. Summarize

1.1 Measuring Principle Scope

1.2 Hardness Value „L“

1.3 Main Features

1.4 Application Range

1.5 Technical Information

1.5.1 Display Unit

1.5.2 Impact Unit D

1.6 Overview Display Unit

1.7 Impact Device Assembling

2. Checking Supplied Accessories

3. Quick Start Guide

3.1 Cable Connection

3.2 Calibration

4. Operation Instructions

4.1 Display Unit

4.1.1 Keys

4.1.2 Measurement Mode

4.1.3 Setup

4.1.3.1 Material Group

4.1.3.2 Impact Direction

4.1.3.3 Scale

4.1.3.4 Browse

4.1.3.5 Adjusting Clock and Calendar

4.1.3.6 Calibration

4.2 The Format of Memory Data

4.3 Backlight

4.4 System Reset

4.5 Automatic Shutdown

5. Printing Data

5.1 Printer Link

5.2 Test Report Format

6. Hardness Test

6.1 Test Preparation

6.2 Sample Preparation

6.3 Test Steps

7. Troubles and Solutions

8. Maintenance and Service

8.1 Impact device Maintenance

8.2 Storage of Report

8.3 Normal Maintenance Procedures APPENDIX 1 Daily Checking

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HMM

APPENDIX 2 Factors affecting the Accuracy APPENDIX 3 Measuring and Conversion Range APPENDIX 4 Material Code

9. Declaration of Conformity

Caution Please read this carefully first:

1. Only the special battery offered by our Company may be used in the main body of the hardness tester. Improper batteries might cause damages to the instrument, battery leakage, even fire or explosion.

2. Any components of the instrument may not get submerged in water or get exposed to rain, which could cause a battery explosion and damage the main body.

3. Electrical shocks have to be avoided; the cabinet may not be opened.

4. If the instrument hasn’t been used for a longer period, it has to be stored in a cool and dry place.

1. Summarize

1.1 Measuring Principle Scope

The measuring principle of HMO Hardness Tester is physically a rather simple dynamic hardness test: An impact body with a hard metal test tip is propelled by spring force against the surface of the test piece. Surface deformation takes place when the impact body hits the test surface, which results in a loss of kinetic energy. This energy loss is calculated by velocity measurements when the impact body is at a precise distance from the surface for both, the impact phase and the rebound phase, of the test. The permanent magnet in the impact body generates an induction voltage in the single coil of the impact device. The voltage of the signal is proportional to the velocity of the impact body. A signal processing by the electronics provides the hardness reading for display and storage. Simply said, harder materials produce higher rebound velocities than less harder ones (higher L- value). HMM Hardness Tester provides a direct hardness measurement within any particular material group (i.e. steel, aluminium etc.). It can be used as a final test result without conversion. However, there are established conversions to other hardness scales in this Hardness Tester as a comfort for our customers. These conversions to other scales (HRC, HRB, HB, HV, HSD etc.) are programmed into the electronics and they can be shown directly on the display as a test result. All data is stored in the native L scale to prevent any possible errors with multiple conversions.

HMM-BA-e-1111 1

Sauter GmbH

Tieringerstr. 11-15 D-72336 Balingen E-Mail: info@sauter.eu

Instruction Manual

1.2. The Hardness value “L”

This term was introduced 1978 into measuring technology by Dr. Dietmar Leeb. It contains the quotient for the impact body’s rebound and impact velocity, multiplied by 1000. Harder materials produce higher rebound velocity than less harder ones. With reference to a particular material group (i.e. steel, aluminium etc.), the L value represents a direct hardness measurement and is used as such. Comparison curves with other standard statistic hardness values have been established (Brinell, Vickers, Rockwell C, B) for the most prevalent materials, enabling the L values to be converted into the relevant values by these procedures. With this hardness tester, such hardness values can directly be displayed in the hardness scales HRC, HRB, HB, HV, HSD and tensile strength (MPa).

1.3 Main features

- Highly accurate, ± 6 HL

- Automatic correction for impact direction

- Large, easy to read display with backlight

- User profiles for fast change of all settings

- Conversion to all common hardness scales

HRC, HRB, HB, HV, HSD and tensile strength

(MPa).

- Supplied by dry-cell, Ultra-low-power

- Easy calibration

- Conforms to the Standard ASTM A956-02

1.4 Application range

- Appropriate for all metals

- Ideal for production level testing

- Best suited for on- site testing of heavy, big or already installed parts

- Handy for difficult to access or confined test locations

- Automatic compensation for impact direction

- Excellent for material selection and acceptance tests

- Easy to handle and accurate on curved test surfaces (R> 10mm)

- Metal production & processing

- Automotive & transportation

- Aerospace & shipyard

- Testing services & laboratories

1.5 Technical information

1.5.1 Display unit

* HL Display range: 0 to 999 HLD * Accuracy: ± 6 HL * LCD: large LCD with backlight * Resolution: 1 HL; 1 HV; 1 HB; 0,1 HRC;

0,1HRB; 1 HSD; 1 MPa * Power: dry cell (3 x 1.5V AAA) * Operating temperature: 0°C up to + 50°C (32°F up to 122°F)

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HMM

* Storage Temperature: -10°C up to + 60°C (14°F up to 140°F) * Humidity: 90 % max. * Dimensions: 150mm x 80mm x 24mm (5.9 x 3.1 x 0.9 inches) * Weight: Approx. 200g (main body)

1.5.2 Impact unit D

Impact energy: 11 Nmm Mass of the impact body: 5.5 g Test tip diameter: 3 mm Test tip material: tungsten carbide Test tip hardness: ≥ 1600 HV Impact length: 147 mm Impact maximum diameter: 20 mm Impact weight: 75 g

1.6 Overview Display Unit

Picture 1-1

1.7 Impact Device Assembling

1. Impact body

2. Support ring

3. Coil

4. Cable

5. Catch chuck

6. Loading tube

7. Release button

2. Checking supplied accessories

It should be checked that the following accessories are supplied with your instrument Picture 2-1

HMM-BA-e-1111 2

Sauter GmbH

Tieringerstr. 11-15 D-72336 Balingen E-Mail: info@sauter.eu

Instruction Manual

The items are supplied with the hardness tester. The accessories available may vary from retailer to retailer, depending on the country or service provider. The purchased accessories only have to be used with Polygon-authorised devices. The use with other devices could cause problems and any repair costs wouldn’t be covered by warranty.

3. Quick start guide

3.1 Connection

The signal cable has to be connected to the impact device and the display unit. Picture 3-1

HMM

Tel: +49-[0]7433- 9976-174 Fax: +49-[0]7433-9976-285 Internet: www. sauter.eu

b) In other mode, the “Back/Print” button has to be pressed to complete setup and to save the parameters set. Then it is returned to measurement mode.

4. “Browse” button: browse the memory data.

5. “Date/Time” button: adjustment of clock and calendar

button: This button has to be pressed to delete

current data in measurement mode or browse mode.

7. button: It has to be pressed to setup the conversion scale in measurement mode. In Date/Time setup mode and in calibration mode, this button has to be pressed to

decrease the flickering bit. In browse mode, to be pressed to display the next data.

8. button: It has to be pressed to setup the impact direction in measurement mode. In Date/Time setup mode and in calibration mode, this button has to be pressed to

button has

3.2 Calibration

The test block has been calibrated in accordance with the dynamic hardness value L. The HMM Impact Hardness Tester has to be calibrated by the test block before the first use (APPENDIX 1)

4. Operating instructions

4.1 Display unit

4.1.1 Keys

Picture 4-1

increase the flickering bit. In browse mode, to be pressed to display the previous data.

button: In measurement mode, it has to be pressed

9. to select the material that will be impacted. In Date/Time setup mode and in calibration mode, this button has to be pressed to select the next bit.

4.1.2 Measurement Mode

HMM Hardness Tester has got a large LCD and an abundance of information.

Picture 4-2

4.1.3 Setup

4.1.3.1 Material Group

In measurement mode, select the material that will be impacted. Following material list is shown on the back of the instrument:

button has to be pressed to

button has

“On/Off“ button: The instrument is turned on and

off by pressing and holding the button.

2. Backlight button: The button has to be pressed to turn on and off the LCD backlight.

3. “Back/Print” button: a) In measurement mode, the “Back/Print” button has to be pressed to erase the measured data. At the same time, if the mini-printer is linked with the display unit, those data will be printed out.

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