The calibration cycle of the precision level of the material tensile machine follows the principle of "regular calibration once a year+shortened as needed", and is determined by combining legal requirements with actual usage scenarios to ensure that the accuracy continues to meet the level standards.

1、 Core calibration cycle requirements

Regular cycle: According to the requirements of the national standard GB/T 16491 and measurement regulations, calibration should be conducted at least once a year to cover core accuracy indicators such as force values, displacement, and deformation (extensometers).

Shorten cycle scenario:

High frequency use (testing ≥ 100 times a day) and heavy load testing (often close to full range) need to be shortened to once every 6 months.

For high-precision demand scenarios such as scientific research, third-party testing, and product certification, it is recommended to calibrate once every 6-12 months to ensure data traceability.

If the equipment encounters abnormalities (such as large data fluctuations or collision repairs), it needs to be calibrated immediately, not limited to fixed cycles.

2、 Key influencing factors of calibration cycle

Equipment usage intensity: The higher the frequency of use and the closer the load is to the upper limit, the faster the wear of sensors and mechanical structures, and the need to shorten the cycle.

Environmental conditions: High temperature, high humidity, and high vibration environments can accelerate accuracy deviation, and the calibration cycle needs to be shortened by 30% -50% compared to normal temperature and dry environments.

Accuracy level: 0.5 level high-precision models require higher stability, and it is recommended to calibrate according to the shortest cycle; Level 2 low precision models can operate on a regular 1-year cycle.

Quality system requirements: Under ISO 9001, laboratory accreditation and other systems, strict implementation of once a year or shorter cycles is required, and calibration records must be retained.

3、 Calibration precautions

Calibration institution: A third-party institution with legal metrological qualifications should be selected, and a certificate of conformity should be issued after calibration. The validity period of the certificate should be consistent with the calibration cycle.

Calibration content: It must cover force value error, repeatability, linearity, displacement accuracy, and extensometer deformation accuracy to ensure that all dimensions meet the grade requirements.

Post calibration processing: If the calibration result exceeds the tolerance, the equipment parameters need to be adjusted or the components (such as sensors) need to be repaired and replaced. Only after recalibration and passing the qualification can they be used.