Digital Portable Hardness Tester

Test any materials in almost any situation with the Mikrometry best portable hardness checking instruments. Digital portable metal hardness tester is used for checking the surface hardness of very large and hard materials. The digital portable metal hardness tester is small and light, easy to carry. To take a hardness measurement test on the digital leeb hardness test machine, you can simply load the impact body, place hardness checking instruments on the test piece (a flat or round surface), and then press the button to take the reading.

Different Types Of Hardness-Checking Instruments

The different types of digital hardness tester machines can be divided into Leeb digital portable hardness tester, Rockwell hardness test gauge instrument, Vickers hardness checking instruments, Brinell digital hardness meter and so on.  As handheld electronic portable hardness tester manufacturers, we mainly develop and produce digital leeb hardness tester tester and shore hardness durometer. The entire hardness-checking machine range is characterized by technological innovation, precise hardness-checking instruments and maximum comfort due to automation and advanced interfaces. Meanwhile, we provide various hardness measuring devices made of different materials for sale, for example, portable hardness testing machine range EHP110 Rebound Leeb Hardness Tester for aluminium and steel. And our portable mental hardness tester machine price is affordable.

Hardness Test Procedure

The following leed test procedure is merely an example for our Leeb Portable Hardness Tester DoHP110.

1. Connect

Connect the signal cable of our hardness checking instruments to the impact device.

2. Keys

1 - Power: pressing and holding to turn on/off the power.

2 - Backlight: Press it to turn on/off the LCD backlight.

3 - Time: Adjust the clock and calendar.

4 - Browse: Browse the memory data of the digital hardness tester machine.

5 - Back/Print:

• In measurement mode, press and hold it to erase the measured data, at the same time, if the mini-printer is linked with the display unit, it will print out those data.

• In another mode, press it to complete setup and save the parameters that you set and return to the measurement mode of the hardness measurement tool.

6 - Up/Dir: press it to set up the impact direction in measurement mode. In Date/Time setup mode and calibration mode, press it to increase the flickering bit. In browse mode, press it to display the previous data. 

7 -  Down/Convert: Press it to set up the conversion scale in measurement mode. In Date/Time setup mode and calibration mode, press it to decrease the flickering bit. In browse mode, press it to display the next data.

8 - Left/Dele: Press and hold to delete current data in measurement mode or browse mode. 

9 - Right/Material: in measurement mode, press it to select the material code. In Date/Time setup mode and calibration mode, press it to move the next digit.

3. Display

4. Test Preparation

(1) Make sure the system connection is safe and reliable.

(2) Press the power button to switch on the power, and inspect if every setting of the display unit is correct, particularly the materials type and impact direction. The setting inconsistent with the actual condition may set up a great error.

5. Sample Preparation

The inappropriate sample will cause a great measurement error. Therefore, users should make the necessary handling and preparation under the original conditions of the sample.

Preparation of the sample and the surface of the test should be coincident with the following basic requirements:

(1) During the process of sample surface preparation, users should avoid the impacts of cold processing and thermal processing.\

(2) The sample surface is plane for better, the test surface should be with a metallic sheen, and not involve an oxide layer or other stains.

(3) Roughness of the test surface Ra≤1.6

(4) Sample must be of sufficient quality and rigidity. If it lacks quality and rigidity, it may cause displacement or shake in the process of testing impact, which can lead to large errors.

Generally speaking, if the sample quality is more than 5kg can be directly tested; if the sample quality is 2~5kgs, the sample should be taken in fixation test by means of appropriate clamping; if the sample quality is 0.05~2kgs, the sample should be conducted coupling before the test; if the sample quality is less than 0.05kg, this hardness tester is inappropriate to use.

Coupling method: The testing sample's back should be prepared to make a plane as a supporting surface with a smooth formation. Filling with a little coupling substance (Industry Vaseline can be used), users can now press to the surface of the supporting object (The weight of the supporting object should be more than 5 kg, and it can be replaced by a test block) to stick into integration.

(5) Samples should be thick enough and with sufficient surface absorption layered. If users use a D-type impact device, the thickness of the sample should not be less than 5mm, and the surface absorption layer (or surface-hardening layer) should not be less than 0.8mm. To accurately measure the hardness of the material, the best way is to remove the surface-hardening layer by processing.

(6) When testing sample surface is not horizontal, the curvature radius of testing and nearby surface should be larger than 30mm. An appropriate supporting ring should be elected and installed.

(7) A sample should not be magnetic. The signal of the impact device would be seriously interfered with in the work by the magnetic, which may cause inaccurate test results.

6. Test Procedure

(1) Loading

Simply load the impact device by sliding the loading tube forward.

(2) Locating

Then place and hold the impact device on the surface of the test piece at the desired test point. Impact indirection should be vertical with the test of the surface.

(3) Impacting (Measure)

Trigger the impact by pressing the release button. The hardness value will be instantaneously displayed.

(4) Read test result

Read out the test result from the LCD display of our digital hardness tester. 

Note: 

Generally, each measurement location of the sample is conducted for the five tests. The range (difference of maximum value and minimum value) values should be less than 15HL. The distance between any two impact points should be ≥3 mm; the distance between the impact position and the edge of the sample should be≥3 mm.

7. Browse

This hardness tester for sale can save 9 hardness values, you can browse them after testing.

8. Print Test Report

The digital hardness tester can be linked to a wireless printer to print a report.

- Place the printer near the digital hardness tester machine (within 2 m), and turn its power on.

- Press the "print" button as shown before for about 2 seconds, a report will then be printed automatically.

NOTE:

The original data in memory will be erased automatically when the print is completed.