Mitech Portable Hardness Tester MH100 applied different metal
materials different from Ultrasonic Hardness Tester
MH100 Portable hardness tester Overview
MH100 Portable hardness tester based on the principle of Leeb
hardness testing theory. With the delicate design,unique style,it
can measure the Leeb hardness of all metallic materials.It has high-contrast Segment LCD ,easy to use.Also support Steel ,when using D sensor to test steel,it can show
HB directly. The storage is large : 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.USB interface to PC for data communicationData processing software can do transmission measurements, the
measured value storage management, statistical analysis of the
measured value, the measured value of the print report and batch
set the instrument parameters .Integrated compact design, small size, portable, highly integrated,
stable and reliable performance, suitable for harsh environment
field operations, prevent from vibration, shock and electromagnetic
interference.
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
Operating Method and Attentions
- Start-Up
- Press the power key to start up the instrument. The instrument then
comes into working mode.
- Loading
- Pushing the loading-tube downwards until contact is felt. Then
allow it to slowly return to the starting position or using other
method locking the impact body.
- Localization
- Press the impact device supporting ring firmly on the surface of
the sample, the impact direction should be vertical to the testing
surface.
- Testing
-Press the release button on the upside of the impact device to
test. 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 measure area of the sample usually need 3 to 5 times of
testing operation. The result data dispersion should not
more than mean value±15HL.
-The distance between any two impact points or from the center of
any impact point to the edge of testing sample
should conform to the regulation of Table 4-1.
-If want accurate conversion from the Leeb hardness value to other
hardness value, contrastive test is needed to get
conversion relations for the special material. Use inspection
qualified Leeb hardness tester and corresponding
hardness tester to test at the same sample respectively. For each
hardness value, each measure homogeneously 5
points of Leeb hardness value in the surrounding of more than three
indentations which need conversion hardness,
using Leeb hardness arithmetic average value and corresponding
hardness average value as correlative value
respectively, make individual hardness contrastive curve.
Contrastive curve at least should include three groups of
correlative data.
