Solution
Calibration limits are based on a product's warranted specifications and the measurement methods used to verify those specifications.
When establishing calibration limits, NI considers the following factors:
- Published warranted specifications that define the expected performance of the product.
- Measurement methodologies used to verify the specification.
- Measurement uncertainty associated with the calibration process.
- Traceability of measurements to recognized standards.
- Validation of the calibration procedure to ensure it is suitable for the intended measurements.
- Tolerance testing used to determine whether the device meets the specified performance requirements.
During a product's development, R&D and Metrology will determine the following:
- Identify critical specifications that should be validated
- Develop and document calibration procedure required to verify and adjust product
- Perform appropriate Uncertainty/TUR analysis on critical specifications
- Develop adjustment API for test solution and customer use
- Validate measurement methodologies required to verify/adjust product
The specifications and limits that get validated during calibration will vary by product.