[Portable Leeb hardness tester MH310 Product details]:

Measuring range：（170～960）HLD
Resolution Accuracy：±6HLD，±1HRC，±5HB
Communication storage：100 measurement series.(Relative to average times 32～1) USB1
Working time：about 150 hours（with default brightness）
Main unit weight：370g
Total weight：5.5KG
Dimensions：212mm×80mm×32mm
Related standards：
 
MH310 portable Leeb hardness tester, based on Leeb hardness measuring principle, quick and easy on-site test the hardness of series metal materials, support free conversion between Leeb, Brinell, Rockwell hardness scale and others,It uses high-contrast  segment LCD to display clear ,stable performance. integrated high-speed thermal printer ,which can print on-site measurements. It is widely used in annealing, tempering, quenching , quality control for the work piece; hardness testing for machine tool and automobile chassis ; on-site hardness testing of in-service non-removable parts ; quality testing for hardware, forging, machine tools and special steels; quality control for batch production process and so on.Good quality and effective cost ,which is a wise choice for regular need of hardness testing . 
 
Function & application
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
Requirements of formal original record for test results
Material identification in the warehouse of metallic materials
Rapid testing in large range and multi-measuring areas for large-scale work piece
 
Working Principle
 The energy quotient is quoted in the hardness unit HL and is calculated from comparing the impact and rebound velocities of the impact body. It rebounds faster from harder samples than from softer ones, resulting in a greater energy quotient which is defined as 1000×Vr/ Vi.
HL=1000×Vr/ Vi
Where:
HL— Leeb hardness value
Vr — Rebound velocity of the impact body
Vi — Impact velocity of the impact body
 

Working Conditions

Working temperature：- 10℃～＋50℃；
Storage temperature：-30℃～＋60℃
Relative humidity: ≤90％；
The surrounding environment should avoid of vibration, strong magnetic field, corrosive medium and heavy dust.
Instrument Features
Measuring range：（170～960）HLD
Error and repeatability ：Impact device D  760±30HLD,±6 HLD；
                                                                        530±40HLD,±10 HLD
                                     
                                                                 
                                        Impact device DL  878±30HLDL,±12HLDL；
                                                                       736±40HLDL,±12 HLDL
                                        Impact device D+15   766±30HLD+15,±12HLD+15；
                                                                            544±40HLD+15,±12HLD+15
                                        Impact device G    590±40HLG,±12HLG；
                                                                       500±40HLG,±12HLG
                                        Impact device C    822±30HLC,±12 HLC；
                                                                      590±40HLC,±12 HLC
Impact direction：vertically downward, oblique, horizontal, oblique, vertical upward, automatically identify
 

Material：Steel and cast steel,Cold work tool steel,Stainless steel,Grey cast iron,Nodular cast iron,Cast aluminum  alloys,BRASS(copper-zinc alloys),BRONZE(copper-aluminum/tin alloys),Wrought copper alloys
Hardness Scale：HL、HB、HRB、HRC、HRA、HV、HS
Paper roll: width (57.5 ± 0.5) mm, diameter: 30mm, long-term imports of paper to ensure long-term data storage
Display：High-contrast Segment LCD
Integrated data memory： 100 measurement series.(Relative to average times 32～1)
Battery:  6V( Ni-MH battery pack)
Power supply:9V/500mA
Recharge time:2.5-3.5hours
Continuous operating period：about 150 hours（with default brightness）
Communication：USB1.1
 

• Based on the principle of Leeb hardness testing theory. It can measure many metallic material

One main unit can match to 6 impact devices
Support Steel ,when using D/DC sensor to test steel,it can show HB directly,no need to check manually.
High-contrast Segment LCD ，easy to use
Software calibration automatically.
100 groups (impact times 32 ~ 1) hardness measurements, each set of data includes single testing value, average value, measurement date / time, impact direction, frequency, material, hardness, and other information.
Real-time display the remaining battery power, charging progress is displayed while charging.
High brightness EL back-light display for easy use in dimly environment.
Automatic sleep and shutdown and other power-saving features
Integrated thermal printer with the instrument as a whole, and quiet operation, fast print speeds, you can print the test report on-site.
 
Equipped with PC software (optional), with functions of measurements transmission , value storage management, statistical analysis of the measured value, the print report of measured value, batch setting instrument parameters , to meet the higher  requirements of quality for activities and management.
 
Small size, portable, , stable and reliable performance, suitable for harsh environment field operations, prevent from vibration,  shock and electromagnetic interference.
 
Dimension:212mm×80mm×32mm