Hardness Testers Calibration

Hardness Testers Calibration

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What is Hardness Tester Calibration

The hardness tester calibration process involves verifying the condition of the anvil and indenter, then running five hardness tests on three certified hardness test blocks, representing the high, middle, and low ranges on all scales being verified.

Two types of calibration criteria are present for Hardness Testers, direct and indirect.

Direct calibration requires verification of the hardness tester’s separate components, such as indenter dimensions, force, measuring device accuracy, and the speed and timing of the indention cycle.

Indirect calibration demands checking the hardness tester against certified hardness test blocks representing various points on the ranges of the scales being verified.

Hardness tester indirect calibration is a more reliable process than direct calibration as this method will consider all of the individual variables in the machine’s function.

Regular inspection and calibration of the hardness tester are necessary to maintain its reliability as it becomes misaligned through the repeated physical use of the tester components. Standard Calibration Services provides these essential calibration services in Bangladesh.


Hardness Tester Parameters

Certified test blocks are necessary to guarantee the precision and traceability of the indirect hardness testing calibration. The hardness tester will require calibration using several test blocks. Three test blocks are typically necessary for each scale, one for each reading of the low, mid, and high hardness levels. The tests may be accurate on the hardness scale at one point but incorrect at other points. Before calibration, the indenter needs checking to ensure no surface flaws. Moreover, the indenter’s area needs Polishness that will come into touch with the substance. In fact, the forces, length scale, and indenter geometry are the primary parameters of the hardness measurement cycle that must need a measurement directly to ensure that the measurement is carried out in accordance with the method described in standard documents.

Calibration organizations then average the values over five readings on each test block for the range you are testing. Depending on the technique, the distance between the centers of two adjacent indentations must be at least 2.5 to 3 times the diameter or diagonal. Inaccurate hardness measurements can result from material deformation brought on by indentations made too closely together or too close to the margins of the test block.

Hardness tester’s findings need to indicate each tested range and the hardness value from the approved test blocks. Depending on the hardness value, a misaligned hardness tester may read correctly at one value and inaccurately at another. The calibration organization do a direct calibration If the Hardness tester doesn’t pass the test block calibration to find the problematic component and make the necessary adjustments.


Strategies of Hardness Tester Calibration

A few concerns need a solution firsthand to choose a practical metrological confirmation approach within the context of standardization and laboratory operations pertaining to the calibration of hardness testers, particularly for indirect verification.

  •   How many points on each scale require an examination?
  •   How many indentation levels need verification again?
  •   How many force levels need an examination?
  •   Is the relationship between indirect and direct results strong enough to partially verify the tester’s hardness scales?

Different organizations conducted and statistically analyzed some tests to provide an answer to these questions and got fruitful output. SCS provides calibration services in Bangladesh regarding these needs.


Reasons for Hardness Tester Calibration

Direct and indirect calibration procedures require hardness measurement. Initial qualification necessitates both procedures to inspect the tester thoroughly. Indirect calibration addresses deviations due to challenging-to-measure factors, while direct calibration alone cannot guarantee minimal effects. Periodic checks ensure stability. Methodologies determine if all parameters are in alignment with tolerances.


When do Hardness Tester Calibration is Required

You need to perform Hardness Tester Calibration periodically to verify that the instrument’s accuracy is within the manufacturer’s stated tolerances for the grade or model. A hardness tester can fall out of alignment when it continuously assesses the relative resistance of materials to denting, bending, or scratching. To regain its dependability, It will need calibration and adjustment.

Standard Calibration Services Pvt. Ltd. gives you a comprehensive package of hardness tester calibration services in Bangladesh. We have four sophistically equipped labs to perform laboratory testing. We do on-site hardness testers calibration for commercial clients.



The Calibration Process

Before calibrating the hardness tester, the device needs some checking like balance, and checking for chips, breaks, or fractures. The anvil and indenter’s condition need a thorough check also. After that, three certified hardness test blocks that represent the high, middle, and low ranges on all scales need verification. After all these tasks, the testers will go for five hardness tests.

We regard the devices as certifiable if the instrument reads within the test blocks’ tolerances. If not, modifications come to fix the device. This verification form accounts for and combines all factors that result in the actual hardness value.


Services SCS Provide

The following hardness tester models and scales are eligible for calibration, as well as regular maintenance and repairs:

·       Micro-hardness testers;

·       Leeb testers;

·       Durometer testers;

·       Analog manual and digital load cell types;

·       Rockwell scales C, B, A, and E;

·       Superficial Rockwell to 15, 30, and 45 N&T Scales;

·       Vickers & Knoop;

·       Brinell;

For your convenience, you can reach our engineers directly by calling +8801727318991 or, emailing info@scsbd-ltd.com.


Calibration Scheme of Hardness Tester

According to the relevant ASTM Standard, our renowned laboratory can calibrate most hardness tester models, including micro-hardness, Vickers, Knoop, and Rockwell. Our professionals can calibrate Rockwell hardness testers to C, B, A, and E scales. A superficial Rockwell hardness tester calibration is available with the 15, 30, and 45 N&T Scales.

Our professionals also assess the accuracy of the testers during calibration, and SCS Pvt. Ltd.’s skilled specialists will make the required modifications to put the tester within the manufacturer’s tolerances. During calibration, maintenance, and repair, our clients can choose other services. SCS Pvt. Ltd. can buy you new indenters, blocks, and hardness tests.

You will obtain a Certificate of Calibration of the following calibration, which will attest that results are traceable to NIST and give you all the details you require regarding the instrument and services rendered. We have been certified by BAB & NABL as an ISO/IEC 17025-approved calibration laboratory. Additionally, we produce and sell Instrument Test & Calibration Benches and Service Field Calibration Equipment. Besides electrical calibration, we also provide Electronic Calibration, Mechanical Calibration, Dimensional Calibration, Temperature Calibration, Moistness Calibration in Humidity Chamber, Weight/Vacuum Calibration, Power/Torque Calibration, Surface Thickness Calibration, Equalizations/Scales Calibration, Hardness Testers Calibration, Autoclaves Calibration.

Please leave a comment below or give us a call if you have any questions about electrical calibration. One of our engineers will be happy to assist you.