Imported Shore hardness tester hardness measurement skills

Hardness is a physical measure of a material's ability to deform under pressure or to resist puncture. Hardness can be divided into relative hardness and hardness. Hardness is generally used in the scientific community but rarely in manufacturing practice. We usually use hardness system for relative hardness, commonly used imported Shore hardness tester as a measuring instrument.

Before measurement, it should be checked that the pointer of imported Shore hardness tester should point to zero in free state. If the pointer value deviates from zero, loosen the screws at the upper right corner and turn the surface to align with zero. Then press the hardness tester on the glass plate. When the end face of the pressure needle and the bottom surface of the pressure foot are in close contact with the glass plate, the pointer should point to 100+/ -0.5ha. If it does not point to 100+/ -0.5ha, press the pressure needle several times slightly. For example, when used on shore hardness tester test rack, the handle can be moved to make the work table rise to the fixed load weight, so that the end face of the pressure needle and the foot plane contact closely with the glass work table, the pointer should point to 100+/ -0.5ha. If the indicator does not point to 100+/-0.5HA, adjust the adjusting screw on the workbench plane. If the indicator still does not point to 100+/-0.5HA after adjustment, send it to the production unit for adjustment.

1. put the sample on the solid, hand hold, so that the pressure needle and the test sample is vertical, and then try to quickly put the pressure needle to the sample, and with sufficient strength to make the end face of the pressure needle and the sample tightly contact 1 to 2 seconds, so that the maximum value of Z will automatically display on the.

2. to stop the next measurement, only tap the ZERO key, and then repeat.

3. On the other hand, each time before stopping the next measurement, it is necessary to press the MAX key to clear (the MAX symbol also disappears), and then press the MAX key again to stop the measurement (repeatedly if it is not to measure the maximum value of Z, there is no need to press the MAX key to make the display show the maximum value of Z notation MAX, in this case, The number on the display is the brake value, when measuring, give up the hardness meter is not moving, in the required time distance reading, you can obtain the required value, usually under the condition of reading distance should be less than 1 second.

4. uniform value performance and measurement times setting Press the N/AVE key, the screen displays the setting times notation and measurement times N. Press N/AVE continuously to set the measurement times. The maximum value of the measurement times is 9. After setting the measurement times, press ZERO or MAX to go to the measurement mode.

5. hardness tester after each test, at the same time display the test hardness value and test times, when the set test times, first display the hardness value, then display the uniform value, at the same time display the uniform value symbol AVE two buzzer sound. The user can also manually calculate the arithmetic uniformity value based on the data that needs to be recorded several times.

6. After setting the measurement times, press MAX and ZERO to measure the form, or the machine will automatically enter the test form after a few seconds. The calculation of uniform value can be divided into Z large value and random value. When performing the calculation of uniform value of Z large value, MAX and N should be displayed on the screen at the same time. To stop the next measurement, simply press ZERO and repeat the previous steps.