How to calibrate the universal testing machine?

The calibration of the universal testing machine needs to verify the accuracy of the system instruments responsible for obtaining force and displacement measurements. In principle, the calibration of the instrument is to compare the instrument with an instrument calibrated with a known traceability standard, and finally prove its accuracy and confirm the traceability of the measurement.

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The necessity of calibrating universal testing machine

How to calibrate the universal testing machine?

The necessity of calibrating universal testing machine

The general purpose of universal testing machine calibration is to reduce the uncertainty of the test results by ensuring the accuracy of the measuring equipment. Many companies use universal testing machines to verify the material properties of their products during the quality control stage before distribution. It is very important to maintain an up-to-date calibration plan to minimize the possibility of manufacturing errors within the company. Inaccurate test results may cause users to draw inaccurate conclusions on test samples from the R&D laboratory, thereby distorting the proposed results.

Therefore, testing laboratories should maintain certification through calibration to ensure that they can reliably perform the tests required by customers. In most environments where universal testing machines are used, it is important that the measuring equipment connected to the machine is as accurate as possible. Therefore, it is important and necessary for some companies to maintain a frequent and consistent calibration plan.

How to calibrate the universal testing machine?

Universal testing machine The work that the universal testing machine will do before calibration to ensure the accuracy of the measurement. There are two types of universal testing machine calibration:

1. Calibrated tensile strength of universal testing machine

The universal testing machine enters the computer program to open the calibration interface, press the test button to start, take a standard weight and hang it on the fixture connection, record the computer display power value, and calculate the weight difference with the standard weight, the error should not exceed ± 1 %.

2. Speed calibration of universal testing machine

First record the initial position of the machine crossbar, and select the speed value on the control panel (using a standard straight steel ruler crossbar stroke). When the device is started, the electronic stopwatch starts timing, and press the stop button at the same time, the stopwatch reaches the time. According to the time of the stopwatch, record the stroke value of the crossbar as the difference between the stroke value of the rate per minute (mm/min) and the straight rod, and calculate the stroke of the crossbar. The error value should not exceed ± 1%.

Regarding the calibration of the test machine. Usually the manufacturer will calibrate the universal testing machine before shipment. However, after using for a period of time, the device may have detection errors. It is best to retrieve the calibration equipment of the equipment manufacturer. The position of the reference point that must be calibrated is determined by the standard and checked during initial operation. Repeat this verification a second time. If the error and repeatability calculations for each run show an error of <1%, the measuring device passes and the calibration is verified. If the error is greater than 1%, the maintenance technician will have to manually adjust the calibration value of the measuring device to make the measurement result match the target range of the calibration device.

If you are interested in learning more about calibration, or want to provide a quote for the calibration of your universal test system. Nanjing T-Bota Scietech Instruments & Equipment Co., Ltd is a professional supplier in China. If you have any questions about the universal testing machine, you can contact our professional after-sales team at any time, or you can enter our official website for more information, our website is https://www.tbtscietech.com/.