KERN & SOHN HMP User Manual
Sauter GmbH
Ziegelei 1
D-72336 Balingen
E-Mail: info@sauter.eu
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: info@sauter.eu
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: info@sauter.eu
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
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