KERN & SOHN HMP User Manual

Sauter GmbH

Ziegelei 1
D-72336 Balingen
E-Mail: [e-mail]

Tel: +49-[0]7433- 9933-199
Fax: +49-[0]7433-9933-149
Internet: www.sauter.eu

Instruction Manual

HMP

MOBILE LEEB HARDNESS TESTER

Model: HMP

Table of contents

1. Overview

1.1 Advantages

1.2 Main Application and Testing Range

1.2.1 Main Application

1.2.2 Testing Range

1.3 Specifications

1.4 Configuration

1.5 Operation Conditions

2. Structure Feature& Testing Principle

2.1 Structure Feature

2.1.1 D Type Impact Device

2.1.2 Different Types of Impact Devices

2.2 Main Screen

2.3 Keypad Description

2.4 Leeb Hardness Testing Principle

3. Preparation

3.1 HMP Preparation and Inspection

3.2 Impact Device Selection

3.3 Preparation of the Sample Surface

4. Testing Program

4.1 Start-up

4.2 Testing

4.3 Reading the measured value

4.4 Annotations

5. Operation Details

5.1 Power on/ off

5.2 Material Setting

5.3 Hardness/ Strength Setting

5.4 Impact Direction Setting

5.5 Average Times Setting

5.6 Data Logging

5.6.1 Viewing stored File/ Group

5.6.2 Clearing selected File/ Group

5.7 Print Report

5.8 System Reset

5.9 EL Backlight

5.10 Auto Power Off

5.11 Battery Replacement

5.12 Connection to PC

5.13 Error Code Reference

6. Maintenance & Service

6.1 Impact Device Maintenance

6.2 Instrument Maintenance Program

6.3 Fault Analysis & Clearance

6.4 Note of Transport and Storage Conditions
APPENDIX
Table 1
Table 2
Table 3
Table 4

1. Overview

1.1 Advantages

 Wide measuring range. Based on the principle of

LEEB hardness testing theory. LEEB hardness
of all metallic materials can be measured.

 Large LCD screen, showing all functions and

parameters, with EL backlight.

 Seven impact devices are available for special

applications. The type of impact device can be
automatically identified.

 Testing possible at any angle, even upside

down.

 Direct display of hardness scales HRB, HRC,

HV, HB, HS, HL.

 Large memory can store 100 information groups

including single measured value, mean value,
impact direction, impact times, material,
hardness scale etc.

 Battery information shows the rest capacity of

battery

 User calibration function
 Software for connection to PC via RS-232 port;

Micro printer support

 Compact plastic case, suitable as well for use

under poor working conditions.

 Continuous working period of about 100 hours

with two Alkaline batteries (AA size)

 Auto Power Off to save energy
 Dimensions: 150 x 74 x 32 mm
 Weight: 245 g

1.2 Main Application and Testing Range

1.2.1 Main Applications

 Die cavity of moulds
 Bearings and other parts
 Failure analysis of pressure vessels , steam

generators and other equipment

 Difficult work pieces
 Installed machinery and permanently assembled

parts

 Testing surface of a small hollow space
 Material identification in the range of metallic

materials

HMP-BA-e-1211 1

Sauter GmbH

Ziegelei 1
D-72336 Balingen
E-Mail: [e-mail]

Tel: +49-[0]7433- 9933-199
Fax: +49-[0]7433-9933-149
Internet: www.sauter.eu

Instruction Manual

HMP

N
o
.

Typ
e of
im
pact
devi
ce

Hardness value
of Leeb
standard
hardness block

Error of
displayed
value

Repeata
bility

1

D

760±30HLD
530±40HLD

±6 HLD
±10 HLD

6 HLD
10 HLD

2

DC

760±30HLDC
530±40HLDC

±6 HLDC
±10 HLDC

6 HLD
10 HLD

3

DL

878±30HLDL
736±40HLDL

±12 HLDL

12 HLDL

4

D+
15

766±30HLD+15
544±40HLD+15

±12
HLD+15

12
HLD+15

5

G

590±40HLG
500±40HLG

±12 HLG

12 HLG

6

E

725±30HLE
508±40HLE

±12 HLE

12 HLE

7

C

822±30HLC
590±40HLC

±12 HLC

12 HLC

No.

Item

Qua
ntity

Remarks

Stand
ard
Config
ura
tion

1

Main unit

1

2

D type impact
device

1

With cable

3

Standard test
block

1

4

Cleaning brush
(I)

1

5

Small support
ring

1
6

Alkaline battery

2

AA size

7

Manual

1

8

Instrument
package case

1

Option
al
Confi­gura­tion

9

Cleaning brush
(II)

1

For use
with G type
impact
device

10

Other type of
impact devices
and support
rings

Refer to
Table 3 and
Table 4 in
the
appendix.

11

DataPro
software

1

12

Communication
cable

1
13

Micro Printer

1 14

Print cable

1

6

POW ER: 2 X 1.5V

HAR DNESS GAUG E

0-Steel and Cast Steel
1-Cold Work Too l Steel
2-Stain less Steel
3-Gray Cast Iron

4-Nodu lar Cast Ir on
5-Cast Aluminum Alloys
6-Copp er-Zinc Al loys
7-Copp er-Alumin um
8-Wrou ght Coppe r
9-Wrou ght Steel

Mate rial Option :

1.2.2 Testing Range

For the Testing Range please refer to Table 1 and Table 2
in the APPENDIX.

1.3 Specifications

Error and repeatability of displayed value, see
Table 1-1

 Measuring range: HLD: (170 ~ 960) HLD
 Measuring direction: 0 ~ 360°
 Hardness Scale: HL, HB, HRB, HRC, HRA,

HV, HS

 Display: segment LCD
 Data memory: max. 100 groups
 Power supply: 3V, (2AA size Alkaline batteries)
 Continuous working period: about 100 hours

(with backlight off)

 Communication interface: RS 232

1.4 Configuration

Table 1-2

1.5 Operation Conditions

Working temperature: 0°C up to + 40°C
Storage temperature: -30°C up to +60°C
Relative humidity: ≤ 90%
Vibrations should be avoided in the surroundings, as well
as strong magnetic field, corrosive medium and dust.

2. Structure Feature& Testing Principle

2.1 Structure Feature

1. Main unit (housing)

2. Keypad

3. LCD Display

4. Socket of RS 232

5. Socket of impact device

6. Impact device

7. Label

8. Battery cover

2.1.1 D Type Impact Device

1 2 3 4 5 6 7

HMP-BA-e-1211 2

Sauter GmbH

Ziegelei 1
D-72336 Balingen
E-Mail: [e-mail]

Tel: +49-[0]7433- 9933-199
Fax: +49-[0]7433-9933-149
Internet: www.sauter.eu

Instruction Manual

HMP

1. Release button

2. Loading tube

3. Guide tube

4. Connection cable

5. Coil unit

6. Impact body

7. Support ring

2.1.2 Different Types of Impact Devices

DC DL C D+15 E G

2.2 Main Screen

The main display screen is shown:

Hardness Scale Average Icon Memory Icon
Battery info

Measured value
Direction Material No. Impact times

Instruction for the main display screen:

Material: The present presetted material
Impact direction: The present impact direction
Hardness scale: Hardness scale of the present measured

value

Battery information: Showing the rest capacity of battery
Measured value: Display shows the single time measured

value (without showing the average icon) or the display
shows the mean value (with average icon prompting).

“HI” means: over conversion value or measurement range

“LO” means: lower than conversion value or measurement

range.

Impact times: Times that have been impacted
Average icon: It appears when the mean value of the

measured values is shown after the preset impact times
are achieved.
Memory icon: It appears when operating with the
instrument’s memory.

2.3 Keypad Description

* The key has to be pressed to store the present group

of measured value into the instrument’s memory. This

operation is only valid after the mean value has been
displayed.

* To display the single measured value, the keys and

have to be pressed.

* To switch on and off the backlight of the LCD, the key
has to be pressed.

* To set the impact direction, the key has to be
pressed.

* To change the impact times in one group, the key
has to be pressed. The impact times item will start flashing

when the key is pressed. Then the impact times value
can be adjusted as desired by the keys and .

Finally, the key has to be pressed to exit from
changing the impact times procedure.
* The hardness scale can be changed by pressing the

key.

*Material can be changed by pressing the key. After
material setting has been changed, presetting hardness
scale recovers HL automatically.

* The key has to be pressed to switch between
hardness test and strength test.
Remark: Only D and DC type of impact device have got
the function of strength testing. So, if the impact device is
not D or DC type, only hardness testing is possible.

*The key has to be pressed to print out the measured
values after the measurement has been performed.

2.4 Leeb Hardness Testing Principle

The basic principle shortly described:
An impact body with a certain weight impacts against the
testing surface under certain test force. Then the impact
velocity and the rebound velocity of the impact body are
measured respectively while the spherically test tip is
located 1 mm above the testing surface.
The calculation formula is as follows:

HL= 1000 x VB/VA

Where HL= Leeb Hardness Value
VB= Rebounding velocity of the impact body
VA= Impact velocity of the impact body

3. Preparation

3.1 HMP Preparation and Inspection

The instrument is calibrated by using the test block,
included in delivery. The error and repeatability of the
displayed value should be within the regulation of
APPENDIX Table 2.
The instrument and the impact device have to be
calibrated using a standard hardness block before the first
use. If the hardness tester has not been used for a longer
period, it is also recommended to calibrate it and as well, if
the instrument’s system has been reset.

HMP-BA-e-1211 3

Sauter GmbH

Ziegelei 1
D-72336 Balingen
E-Mail: [e-mail]

Tel: +49-[0]7433- 9933-199
Fax: +49-[0]7433-9933-149
Internet: www.sauter.eu

Instruction Manual

HMP

To power on the instrument, the key has to be pressed
and held, meanwhile the key is also pressed. Then the

calibration screen is shown as on page 4.

5 points have to be tested on the standard hardness block.
After that, the average value of those 5 measured values

will be displayed. The keys and have to be
pressed to change its nominal value.
Finally the calibration has to be confirmed by pressing the

key. To cancel the calibration, the key has to be
pressed. Range of adjustment: ±30 HL
The measurement parameters, including the material

setting, the hardness scale and the impact direction, can’t

be changed during calibration.

3.2 Impact Device Selection

For the selection of impact devices, please refer to
APPENDIX Table 1 and Table 3.

3.3 Preparation of the Sample Surface

Preparation of the sample surface should conform to the
relative requirements in APPENDIX Table 3.

 During the preparation of the sample surface,

any heating or cold processing on this surface
should be avoided.

 Too big roughness of the surface being

measured could cause errors. The surface of the
sample should show metallic luster, be smooth
and polished, without any stains of oil etc.

 Support of the sample is not necessary for

heavy objects. Medium-weight samples have to
be placed onto a smooth and stable plane. It
must be placed in absolute equability and
without any wobble.

 Curved surface: The best testing surface, of

course, is flat. When the curvature radius R of
the surface to be tested is smaller than 30 mm
(D, DC, D+15, C, E and DL type of impact
device) and smaller than 50 mm (G type of
impact device), the small support rings should
be chosen.

 The sample should have enough thickness, the

minimum thickness of it should conform to
Table 3.
*For a sample with a hardened layer on its surface,
the depth of the hardened layer should also conform
to Table 3.

 Coupling: Light-weight samples must be firmly

coupled with a heavy base plate. Both coupled
surfaces have to be flat and smooth; there may
not rest any redundant coupling agent. The
impact direction must be vertical to the coupled
surface. If the sample is a big plate, long rod or
bending piece, it can be deformed and become
unstable, even though its weight and thickness
is big enough; accordingly, the test value might
not be accurate. So the sample should be
reinforced or supported at its back.

 Magnetism of the sample itself should be

avoided.

4. Testing Program

4.1 Start-up

 The plug of the impact device has to be inserted

into the socket of the impact device of the
instrument.

 The key has to be pressed to power on. Now

the instrument is in working mode.

4.2 Testing

- The release button on the upside of the impact device
has to be pressed to start testing. The sample and the
impact device as well as the operator are all required to be
stable now. The action direction should pass the axis of
the impact device.

- Each measurement area of the sample usually needs 3
to 5 times of testing operations. The result data dispersion
should not be more than the mean value ± 15 HL.

- The distance between any two impact points or from the
centre of any impact point to the edge of the sample
should conform to the regulation of Table 4-1.

- If an accurate conversion from the Leeb hardness value
to another hardness value is requested, a contrastive test
is needed to get conversion relations for the special
material. An inspected qualified Leeb hardness tester and
a corresponding hardness tester have to be used to test at
the same sample respectively. For each hardness value,
each homogeneous measurement, 5 points of Leeb
hardness value are needed. They are in the surroundings
of more than three indentations which need conversion of
hardness. The Leeb hardness arithmetic average value
and the corresponding hardness average value as
correlative value respectively are used to establish an
individual hardness contrastive curve. The contrastive
curve at least should include three groups of correlative
data.

HMP-BA-e-1211 4

Sauter GmbH

Ziegelei 1
D-72336 Balingen
E-Mail: [e-mail]

Tel: +49-[0]7433- 9933-199
Fax: +49-[0]7433-9933-149
Internet: www.sauter.eu

Instruction Manual

HMP

Material No..

Material

0
1
2
3
4
5
6
7
8

Steel and cast steel
Cold work tool steel
Steinless steel
Gray cast iron
Nodular cast iron
Cast aluminium alloys
Copper-Zinc alloy
Copper-Aluminium alloy
Wrough copper

Table 4-1

4.3 Read Measured Value

After each impact operation, the current measured value
will be displayed, to the impact times always one is added.
The buzzer alerts with a long howl if the measured value is
not within the valid range. If the presetted impact times are
reached, the buzzer alerts with a long howl. After two
seconds it will alert a short howl and the mean measured
value will be displayed.

4.4 Notes

* Replacement of the impact device must be done during
the instrument is powered off. Otherwise the main body
cannot identify the type of the impact device. This might
damage the circuit board of the main body.
* The current test value cannot be saved if the impact
times are less than the presetted times value.
* Only D and DC type of impact device have got the

function of strength test option. It isn’t possible to change

the setting to strength tests by using other types of impact
device. The setting will be automatically set to hardness
testing after replacing the impact device; no matter the
setting is hardness testing or not before.
* Not all materials can be converted to all hardness scale
values. The hardness scale is reset to HL automatically
after changing material. So, material has to be selected
first before changing the hardness scale.

5. Operation Details

5.1 Power on/ off

The key has to be pressed to power on the instrument.
Be sure whether the impact device is plugged in before
powering on. The type of impact device will be
automatically detected while powering on. This information
will be displayed on the screen. Users should take notice
to this type. After a few seconds, the screen will exit and
the main display screen is entered as follows:

HMP-BA-e-1211 5

The hardness tester can be turned off by pressing the
key while it is working. It has got a special memory which
retains all settings even if the power is off.

5.2 Material Setting

The key has to be pressed to change the material to
the desired setting. Hardness scale is automatically
recovered after material presetting has been changed.
Material has to be selected first, then hardness scale.
In hardness testing, following materials can be selected:
Steel and cast steel, cold work steel, stainless steel, grey
cast iron, nodular cast iron, cast aluminium alloys, copper­zinc alloys, copper-aluminium alloys, wrought copper and
wrought steel. The relationship between the material
number displayed on the screen and the material is as
follows:
Table 5-1

In strength testing following materials are selectable:
Mild steel, high-carbon steel, Cr Steel, Cr-V steel, Cr-Ni
steel, Cr-Mo steel, Cr-Ni-Mo steel, Cr-Mn-Si steel, super
strength steel and stainless steel. The relationship
between the material number displayed on the screen and
the material is as follows:
Table 5-2

5.3 Hardness/ Strength Setting

The key has to be pressed to switch between
hardness testing and strength testing (бb).

Note: Only D and DC type of impact device have got
the function of strength testing. So, for all other types
of impact device, only hardness testing is possible.

Sauter GmbH

Ziegelei 1
D-72336 Balingen
E-Mail: [e-mail]

Tel: +49-[0]7433- 9933-199
Fax: +49-[0]7433-9933-149
Internet: www.sauter.eu

Instruction Manual

HMP

In hardness testing, the key has to be pressed to
change the hardness scale. The supported hardness
scales includes: HL, HV, HB, HRC, HS, HRB und HRA.

 Only the valid hardness scale for the present

selected impact device and material are

displayed. A hardness scale which isn’t valid, will

not be displayed.
 Material has to be selected first, subsequently

hardness scale.
 The pre-setted hardness scale will discover HL

automatically after pre-setted material has been

changed.

5.4 Impact Direction Setting

The desired impact direction can be entered by pressing

key.

5.5 Average Times Setting

Average times can be modified within the range of 1 to 32
as follows:

1. In operation mode, the key has to be pressed.
The impact item will start flashing.

2. To set the average times to the required number, the
and key have to be pressed.

3. The key has to be pressed to exit from this
procedure.

5.6 Data Logging

There can be stored up to 100 files (F00-F99) inside the
instrument. By simply pressing the key after a new

measurement is finished, the icon “AVE“ will be shown on
the screen. The measured hardness/ strength group
values will be saved to memory. The new saved file is
appended as the last file of the memory. This function
provides the user with the ability to view/ delete a file/
group previously saved in memory.

5.6.1 Viewing stored File/ Group

To view the memory data, following steps are necessary:

1. The key has to be pressed to activate the data
logging function. The memory icon will appear. The current
file name, the test parameter of the data group and the
mean value of the group will be displayed. If there is no
data in memory, <E04> will be displayed and it will be
returned back.

2. The and key have to be used to select the
desired file to view.

3. The key has to be pressed to see details of that data
group.

4. The and key have to be used to view each single
measured data in that group while viewing details.

5. The key has to be pressed to return to previous
screen any time during data logging.

5.6.2 Clearing selected File/ Group

It may be required to delete a file from the instrument’s

memory. This procedure is outlined in following steps:

1. The key has to be pressed to activate data logging
function. The memory icon will appear. The current file
name, the test parameter of the data group and the mean
value of the group will be displayed. If there is no data in
memory, <E04> will be displayed and it will be returned
back.

2. The and key have to be used to scroll to the file
that shall be deleted.

3. The key has to be pressed on the desired file. It will
be automatically deleted and “-DEL” will be displayed.

4. The key has to be pressed, at any time, to exit from
data logging function and return to measurement mode.

Note: The hardness tester may not be powered off
while deleting data. This could lead to unpredicted
consequences!

5.7 Print report

At the end of the inspection process or at the end of the
day, the readings may be required to being printed. This
function is only possible with the mini-printer.
Before printing, the connection plug of the print cable
(optional parts) has to be inserted into the socket on the
up-left of the main body. The other plug has to be inserted
into the communication socket of the mini-printer. The
measurement result can be printed out immedialtely after

each testing process by pressing the key.
To print the data stored in the instrument’s memory,
following steps have to be performed:

1. The key has to be pressed to activate data logging
function. The memory icon will appear.

2.The and key have to be used to select the
desired file.

3. The key has to be pressed to print the selected file.
All data in current file will be sent to the mini-printer via
RS-232 port and will be printed out.

4. The key has to be pressed, at any time, to exit from
data logging function and return to measurement mode.

5.8 System Reset

Factory defaults will be restored by pressing down the
key while powering on the instrument. This might possibly
be helpful if the parameter in the gauge was somehow
corrupted.

5.9 EL Backlight

With the EL background light, it is convenient to work in
dark environment. The has to be pressed to switch on

or off the backlight any time after powering on the
instrument. Since the EL backlight consumes much power,
it only has to be turned on if really necessary.

HMP-BA-e-1211 6

Sauter GmbH

Ziegelei 1
D-72336 Balingen
E-Mail: [e-mail]

Tel: +49-[0]7433- 9933-199
Fax: +49-[0]7433-9933-149
Internet: www.sauter.eu

Instruction Manual

HMP

5.10 Auto Power Off

The gauge features an Auto Power Off function designed

to conserve battery’s life. If the hardness tester is idle

(neither measuring nor any key operation) for 5 minutes, it
will turn itself off. Before, the LCD display will continue

flashing for 20 seconds. Exept the key, any key can be
pressed to stop the twinkle of the LCD display.
Like this, the operation of powering off at the moment can
be interrupted.
While the voltage of the battery is too low, <E00> will be
displayed. Then the gauge is automatically powered off.

5.11 Battery Replacement

Two AA size Alkaline batteries are necessary as power

resource. After several hours’ usage, the battery symbol

on the screen will be shown as . The less dark parts
are indicated, the more close to be filled. When the
capacity runs out, the battery symbol will be shown as

and the symbol will begin to flash. Now batteries

have to be replaced.

Pay attention to the polarity of the batteries!
The batteries have to be taken out if the instrument
hasn’t been used for a longer period of time.

5.12 Connection to PC

The hardness tester HMO is equipped with a RS-232 serial
port. Using the accessory cable (the cable and following
referred software are optional parts) the gauge has the
ability to get connected to a computer or external storage
device. Measurement data stored in memory of the gauge
can be transferred to PC with the RS-232 port.
Detailed information of the communication software and its
usage, please refer to the software manual.

5.13 Error Code Reference

 Any lubricant is absolutely prohibited inside the

impact device.

6.2 Instrument Maintenance Program

* If the standard Rockwell hardness block is used to test
and if all the error is bigger than 2 HRC, the ball top of the
impact device or the impact object may have to be
changed. The invalidation may be caused by abrasion.
* If any other abnormal phenomena appear to the
hardness tester, nothing may be dismantled or any fixed
parts may not be adjusted by the user himself.
The warranty card has to be filled in and sent to SAUTER
GmbH. The warranty service will be performed within a few
working days.

6.3 Fault Analysis & Clearance

6.4 Note of Transport and Storage Conditions

* The instrument has to be kept away from vibration,
strong magnetic field, corrosive medium, dampness and
dust. Storage in ordinary temperature.

DESIGNED IN REGARD TO THESE STANDARDS:

 ASTM A956
 DIN 50156

10. Declaration of conformity

6. Maintenance & Service

6.1 Impact Device Maintenance

 After 1000 to 2000 times of usage, the impact

body and the guide tube have to be cleaned with

the provided nylon brush. When cleaning the

guide tube, the support ring has to be

unscrewed first. Then the impact body has to be

taken out. The nylon brush has to be spiralled in

counter-clock direction into the bottom of the

guide tube. It has to be taken out and repeated

for 5 times. At last, the impact body and the

support ring have to be installed again.
 The impact body has to be released after use.

HMP-BA-e-1211 7

Sauter GmbH

Ziegelei 1
D-72336 Balingen
E-Mail: [e-mail]

Tel: +49-[0]7433- 9933-199
Fax: +49-[0]7433-9933-149
Internet: www.sauter.eu

Instruction Manual

HMP

Material

Method
Impact device

D/DC

D+15

C G E

DL

Steel and cast steel

HRC

20～68.5

19.3～67.9

20.0～69.5

22.4～70.7

20.6～68.2

HRB

38.4～99.6

47.7～99.9

37.0～99.9

HRA

59.1～85.8

61.7～88.0

HB

127～651

80～638

80～683

90～646

83～663

81～646

HV

83～976

80～937

80～996

84～1042

80～950

HS

32.2～99.5

33.3～99.3

31.8～102.1

35.8～102.6

30.6～96.8

Cold work tool steel
HRC

20.4～67.1

19.8～68.2

20.7～68.2

22.6～70.2

HV

80～898

80～935

100～941

82～1009

Stainless steel
HRB

46.5～101.
7

HB

85～655

HV

85～802

Grey cast iron
HRC

HB

93～334

92～326

HV

Nodular cast iron
HRC

HB

131～387

127～364

HV

Cast aluminium
alloys

HB

19～164

23～210

32～168

HRB

23.8～84.6

22.7～85.0

23.8～85.5

BRASS (copper-zinc
alloys)

HB

40～173

HRB

13.5～95.3

BRONZE (copper­alum./tin alloys)

HB

60～290

Wrought copper
alloys

HB

45～315

No.

Material

HLD

Strength σ

b

(MPa)

1

Mild steel

350～522

374～780

2

High-carbon steel

500～710

737～1670

3

Cr- Steel

500～730

707～1829

4

Cr-V Steel

500～750

704～1980

5

Cr-Ni Steel

500～750

763～2007

6

Cr-Mo Steel

500～738

721～1875

7

Cr-Ni-Mo Steel

540～738

844～1933

8

Cr-Mn-Si Steel

500～750

755～1993

APPENDIX
Table 1

Table 2

HMP-BA-e-1211 8

Sauter GmbH

Ziegelei 1
D-72336 Balingen
E-Mail: [e-mail]

Tel: +49-[0]7433- 9933-199
Fax: +49-[0]7433-9933-149
Internet: www.sauter.eu

Instruction Manual

HMP

9

Super strength steel

630～800

1180～2652

10

Stainless steel

500～710

703～1676
Type of impact device

DC(D)/DL

D+15

C G E

Impact energy
Mass of impact body

11mJ

5.5g/7.2g

11mJ

7.8g

2.7mJ

3.0g

90mJ

20.0g

11mJ

5.5g

Test tip hardness:
Diam. Test tip:
Material of test tip:

1600HV
3mm
Tungsten
carbide

1600HV
3mm
Tungsten
carbide

1600HV
3mm
Tungsten carbide

1600HV
5mm
Tungsten carbide

5000HV
3mm
synthetic diamond

Impact device diameter:
Impact device length:
Impact device weight:

20mm
86(147)/ 75mm
50g

20mm
162mm
80g

20mm
141mm
75g

30mm
254mm
250g

20mm
155mm
80g

Max. hardness of sample

940HV

940HV

1000HV

650HB

1200HV

Mean roughness value of
sample surface Ra:

1.6μm

1.6μm

0.4μm

6.3μm

1.6μm

Min.weight of sample:
Measure directly
Need support firmly
Need coupling tightly

>5kg
2～5kg

0.05～2kg

>5kg
2～5kg

0.05～2kg

>1.5kg

0.5～1.5kg

0.02～0.5kg

>15kg
5～15kg

0.5～5kg

>5kg
2～5kg

0.05～2kg

Min. Thickness of sample :
Coupling tightly
Min. layer thickness for
surface hardening

5mm
≥0.8mm

5mm
≥0.8mm

1mm
≥0.2mm

10mm
≥1.2mm

5mm
≥0.8mm

Size of tip indentation

Hardness
300HV

Indentation
diameter
Depth of indentation

0.54mm
24μm

0.54mm
24μm

0.38mm
12μm

1.03mm
53μm

0.54mm
24μm

Hardness
600HV

Indentation
diameter
Depth of indentation

0.54mm
17μm

0.54mm
17μm

0.32mm
8μm

0.90mm
41μm

0.54mm
17μm

Hardness
800HV

Indentation
diameter
Depth of indentation

0.35mm
10μm

0.35mm
10μm

0.35mm
7μm

--

--

0.35mm
10μm

Available types of impact devices

DC: test hole or
hollow cylindrical
DL: test slender
narrow groove or
hole

D+15: test
groove or
reentrant
surface

C: test small, light
thin parts and
surface of
hardened layer

G: test large,
thick, heavy and
rough surface
steel

E: test super high
hardness material

Table 3

HMP-BA-e-1211 9

Sauter GmbH

Ziegelei 1
D-72336 Balingen
E-Mail: [e-mail]

Tel: +49-[0]7433- 9933-199
Fax: +49-[0]7433-9933-149
Internet: www.sauter.eu

Instruction Manual

HMP

Nr.

Type

Sketch of non-conventional
supporting ring

Remarks

1

Z10-15

For testing cylindrical outside
R10～R15

2

Z14.5-30

For testing cylindrical outside
R14.5～R30

3

Z25-50

For testing cylindrical outside
R25～R50

4

HZ11-13

For testing cylindrical inside
R11～R13

5

HZ12.5-17

For testing cylindrical inside
R12.5～R17

6

HZ16.5-30

For testing cylindrical inside
R16.5～R30

7 K10-15

For testing spherical outside surface
SR10～SR15

8

K14.5-30

For testing spherical outside surface
SR14.5～SR30

9

HK11-13

For testing spherical inside surface
SR11～SR13

10

HK12.5-17

For testing spherical inside surface
SR12.5～SR17

11

HK16.5-30

For testing spherical inside surface
SR16.5～SR30

12
UN

For testing cylindrical outside surface,
radius adjustable R10～∞

Table 4

HMP-BA-e-1211 10