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Accurate measurement is crucial in many fields, especially in quality control (QC) and quality assurance (QA). However, understanding the true accuracy of measuring instruments can be challenging. The distinction between stated accuracy and accredited accuracy is essential for making informed purchasing decisions.

Let’s explore this in detail and understand how Creaform products exemplify high standards in measurement accuracy.

Stated Accuracy vs. Accredited Accuracy

Stated Accuracy: This is the accuracy claimed by the manufacturer. It is often highlighted in marketing materials and product specifications but lacks independent verification.

Accredited Accuracy: This is an objective measurement of a product’s true accuracy, verified by independent testing and certification. It assures that the product meets specific quality standards and delivers reliable results.

Accuracy: Beyond Just Numbers

Accuracy specifications do more than just quantify performance; they reflect the manufacturer’s commitment to quality, technical expertise, and adherence to rigorous testing standards. When evaluating measuring instruments, it is crucial to look beyond the numbers and understand the standards and certifications backing these claims.

Key Standards for Accredited Accuracy

ISO 17025: A Mark of Excellence

ISO 17025 is an international standard outlining the technical and management requirements for calibration laboratories. When a manufacturer achieves ISO 17025 certification, it signifies that their calibration processes meet high standards for accuracy, reliability, and quality management.

Manufacturers with ISO 17025 certification can display this on their calibration certificates, providing evidence of rigorous testing and reliable calibration results.

VDI/VDE 2634 Part 3: Assurance for Optical 3D Scanners

This German standard specifies the requirements for the accuracy, repeatability, and reliability of optical 3D measuring systems. Certification according to VDI/VDE 2634 Part 3 ensures that a 3D scanner can accurately measure dimensions and shapes, providing consistent results over time and under various conditions.

ISO 10360: Comprehensive Testing for Coordinate Measuring Systems

ISO 10360 encompasses performance requirements for different types of coordinate measuring systems. Certification ensures that the device meets stringent criteria for errors in probing form and size, uni- and bidirectional length measurement, and flat form measurement, among others.

Ensuring Consistency with Regular Tests and Verifications

Maintaining the accuracy of measuring instruments requires regular testing and periodic verification. Both manufacturers and users must follow prescribed procedures to ensure ongoing reliability. These tests should be straightforward and cost-effective, using standardised artifacts for measurement.

Interpreting Specifications: MPE vs. “Up To”

Understanding accuracy specifications is crucial. Certified manufacturers use the term Maximum Permissible Error (MPE), indicating a strict upper limit on allowable measurement error. This provides greater confidence in the equipment’s performance.

Conversely, specifications using “up to” can be ambiguous, suggesting a range of potential errors without a guaranteed upper limit. MPE is a more reliable indicator of a product’s accuracy.

Creaform: Exemplifying High Standards in Measurement Accuracy

Creaform is a leading manufacturer in the field of portable and automated 3D measurement solutions. Their commitment to accredited accuracy is evident in their adherence to international standards such as ISO 17025, VDI/VDE 2634, and ISO 10360.

HandySCAN 3D | BLACK Series

The HandySCAN 3D | BLACK Series is a state-of-the-art portable 3D scanner renowned for its high accuracy and reliability. It meets stringent standards, providing users with precise measurements for a variety of applications.

MetraSCAN 3D-R

The MetraSCAN 3D-R is a robot-mounted optical CMM scanner designed for automated quality control. It ensures optimal performance consistency through regular tests and periodic verifications, making it a trusted tool for high-end manufacturers.

Commitment to Quality and Transparency

Creaform’s dedication to quality is reflected in their comprehensive testing procedures and detailed calibration certificates. By certifying their products to rigorous standards, they demonstrate transparency and a commitment to delivering reliable, accurate, and consistent measurement solutions.

Conclusion

Understanding the difference between stated and accredited accuracy is vital for making informed decisions when selecting measuring instruments. Manufacturers like Creaform, who adhere to stringent international standards and provide detailed calibration certificates, offer assurance of the highest quality and reliability in their products.

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