Advantages of Mh100 Small Pencil Type Subminiature Hardness Tester
Compact and integrated. The impact device and the main body integrated together.
Wide measuring range. Based on the principle of Leeb hardness testing theory. It can measure the Leeb hardness of all metallic materials.
Large screen LCD, showing all functions and parameters. With EL background light.
Test at any angle, even upside down.
Direct display of hardness scales HRB, HRC, HRA, HV, HB, HS, HL.
Large memory could store 100 groups (Relative to average times 32~1 ) information including single measured value, mean value, impact direction, impact times, material and hardness scale etc.
Battery information showing the rest capacity of the battery and the charge status.
User calibration function.
Software to connect to PC via USB port.
Li-Ion rechargeable battery as the power source. Charge circuit integrated inside the instrument. Continuous working period of no less than 200 hours (EL off and no printing).
Auto power off to save energy.
Main Application of Mh100 Small Pencil Type Subminiature Hardness Tester
Die cavity of molds
Bearings and other parts
Failure analysis of pressure vessel, steam generator and other equipment
Heavy work piece
The installed machinery and permanently assembled parts
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
Testing Range of Mh100 Small Pencil Type Subminiature Hardness Tester
The model includes D type, C type and DL type according to the impact device.
Testing range refer to Table 1 and Table 2 in the Appendix.
Parameters of Mh100 Small Pencil Type Subminiature Hardness Tester
Error and repeatability of displayed value see Table1-1 below.
||Type of impact device
||Hardness value of Leeb standard hardness block
||Error of displayed value
Data memory:100 groups max.(relative to impact times 32~1)
Battery: 3.7V Li-Ion, Rechargeable
Battery charger: 5V/500mA
Continuous working period:about 200 hours(With backlight off, no printing)
||D type, C type and DL type optional
||Standard test block
||For comm. And charging
||Cleaning brush I
||Small support ring
||Instrument package case
||Other type of impact devices and support rings
||Refer to Table 3 and Table 4 in the appendix.
Working temperature: -10ºC~+50ºC;
Relative humidity: ≤90%;
The surrounding environment should avoid of vibration, strong magnetic field, corrosive medium and heavy dust.
The instrument can only work with the specially designed battery pack and power adapter (charger) supplied by Mitech Co. LTD. Working with others may result in damage of the instrument, battery leakage, fire or even explosion.
Do not cast the battery pack into fire and do not short circuit, disassemble or heat the battery pack, otherwise battery leakage, fire or even explosion may occur.
Images of MH100 Hardness Tester
2 Structure Feature &Testing Principle
2.1 Structure Feature
2.1.1 The Hardness Tester Appearance
1 LCD display 2 Main unit 3 Socket of USB 4 Impact device
5 Battery compartment cover 6 Product label 7 Keypad
2.1.2 D Type Impact Device
1 Support ring 2 Impact body 3 Coil unit
4 Guide tube 5 Loading tube 6 Release button
2.1.3 Different Types of Impact Device
The instrument has three types: type D, type C and type DL depending on different impact device. Please refer to Table 1 and Table 3 for details.
2.2 Main Screen
Below is the main display screen:
Instruction of the Main Display Screen:
Material:The present presetting material.
Impact direction:The present impact direction.
Hardness scale:Hardness scale of the present measured value.
Battery information:Showing the rest capacity of the battery and the charging status.
Measured value:Display present single time measured value(without showing average icon), or display the present mean value (with average icon prompting). "-HI-" means over conversion value or measure range. "-LO-" means lower than conversion value or measure range.
Impact times: Times that have been impacted.
Average Icon:It will appear when showing the mean value of the measured values after reaching the presetting impact times.
Memory Icon: It appears when operating the instrument memory.
2.3 Keypad Definitions
The instrument has three keys: ,F1 and F2.
Key - Turning on/off the instrument.
Key F1 and F2 - Selecting or modifying the instrument parameters.
Short-press: Press on a key lasting for not more than one second.
Long-press: Press on a key lasting for more than one second
2.4 Leeb Hardness Testing Principle
The basic principle is to use an impact body of certain weight impacts against the testing surface under certain test force, then measure the impacting velocity and the rebounding velocity of the impact body respectively when the spherically test tip is located 1mm above the testing surface.
The calculation formula is as follows:
Where, HL-- Leeb hardness value
VB-- Rebounding velocity of the impact body
VA-- Impacting velocity of the impact body