MH200 portable Leeb hardness tester, hardness measurement, can be easily field testing a variety of hardness of metallic materials, supports a magnitude, Brinell, Rockwell and many other free conversion between hardness. It adopts international popular all enclosed aluminum alloy shell, durable, has a strong resistance to electromagnetic, anti-vibration, anti-jamming ability; IC integrated circuit of low power design relies on a stable, reliable performance; Full Chinese dot-matrix LCD display, menu-simple and quick operation; Supports the communication of PC machine and print functions. Is widely used in annealing, tempering, quenching heat treatment quality control of the workpiece; Machine tool, hardness testing of automotive chassis; Large field hardness testing in service no removable parts; Metal, forging, machine tools, quality inspection of special steel; Product quality control in mass production, high quality and low price, utility, is the sensible choice of hardness testing General requirements.

Calculation method: HL=1000xVB/VA

In the formula: HL--hardness value

VB--impact of rebound speed

VA--impact body impact speed

Press "on/off" button, at this time the power is switched on, the instrument enters the measuring State

Loading
Push the load lock down the impact body; DC impact device, can be loaded on the test surface, insert the DC impact device loaded, until the stop position when finished loading
Positioning
Impact device supporting ring according to the selected measuring fast on the surface, the impact should be perpendicular to the test surface
Measurement
Press the release button at the top of percussive machine, were measured. Request samples, impact device, the operator is stable, and force should be directed through the impact device axis
General conduct five tests for each portion of the sample. Data should not exceed the average of 15HL
Between two arbitrary indentation distance or a centre of indentation from the specimen edge distance should conform to the specifications in table 3. For certain materials, Leeb hardness value to be accurately converted into other hardness value comparison test must be done to get the corresponding score. By: standards by Leeb hardness tester and respectively in the hardness test on the same sample, for each a hardness value in more evenly distributed around the conversion of hardness indentation is needed in the determination of hardness values, average hardness and hardness on the Richter scale respectively as the corresponding value, hardness comparison curves. Compare the curves should include at least three groups correspond to the data
Read the measuring value
More effective tests for average hardness testing data
Leeb hardness hardness values are shown before the symbol HL, HL behind impact device types are shown. Such as 780HLD d impact device for the determination of hardness value of 780. For Leeb hardness conversion of hardness, hardness of Leeb hardness before the symbol, together with the corresponding symbol. For example 420HVHLD indicates that d-type Leeb hardness conversion impact device for the determination of hardness value of 420

Matters needing attention

Replace the impact device must be in the off State, you cannot automatically identifies impact devices types, and may also cause damage to the circuit board
Under normal circumstances, has failed to meet the set number of shocks cannot store the current measured value. If you want to store, press the "average"-end measure in advance and then store
Press the "average" premature closing of the key measurements, "system settings" menu in the "auto save" and automatically transmit data "function does not work
Only the d and DC strength measurement function impact device, so when using other types of impact devices, will not be able to modify the "stiffness/strength" settings, if you use the D/DC impact device for "strength", and replaced by other impact devices, "stiffness/strength" setting is automatically changed to "hardness"
When set to "intensity" measurement, will not be able to set degree of hardness (the cursor from the "hardness" skip on)
Not all material can be converted to all hardness and change the material hardness will automatically revert to Leeb HL. So when setting the measurement conditions to set up "material", and then set the "hardness"