外径测量千分尺是一种常用的测量工具，用于测量直径、长度和厚度等尺寸。ISO 3611:2010规定了外径测量千分尺的设计和计量特性，以确保其测量结果的准确性和可靠性。

该标准规定了外径测量千分尺的设计要求，包括测量范围、分辨率、精度等。测量范围是指外径测量千分尺能够测量的最大和最小尺寸范围。分辨率是指外径测量千分尺能够分辨的最小尺寸差异。精度是指外径测量千分尺的测量结果与实际尺寸之间的偏差。

此外，该标准还规定了外径测量千分尺的计量特性，包括测量误差、重复性、稳定性等。测量误差是指外径测量千分尺的测量结果与实际尺寸之间的偏差。重复性是指在相同的测量条件下，外径测量千分尺多次测量同一尺寸的结果之间的差异。稳定性是指外径测量千分尺在一定时间内测量同一尺寸的结果之间的差异。

ISO 3611:2010还规定了外径测量千分尺的标志和标识要求，以及对外径测量千分尺进行校准和检验的方法和程序。

总之，ISO 3611:2010为外径测量千分尺的设计和计量特性提供了详细的规定，有助于确保外径测量千分尺的测量结果的准确性和可靠性。

相关标准
- ISO 14253-1:1998 Geometrical Product Specifications (GPS) — Inspection by measurement of workpieces and measuring equipment — Part 1: Decision rules for proving conformity or non-conformity with specifications
- ISO 14253-2:2011 Geometrical Product Specifications (GPS) — Inspection by measurement of workpieces and measuring equipment — Part 2: Guidance for the estimation of uncertainty in GPS measurement, in calibration of measuring equipment and in product verification
- ISO 14253-3:2011 Geometrical Product Specifications (GPS) — Inspection by measurement of workpieces and measuring equipment — Part 3: Guidelines for achieving agreements on measurement uncertainty statements
- ISO 14253-4:2010 Geometrical Product Specifications (GPS) — Inspection by measurement of workpieces and measuring equipment — Part 4: Background on functional limits and specification limits in decision rules for verifying conformity or nonconformity with specifications
- ISO 14253-5:2018 Geometrical Product Specifications (GPS) — Inspection by measurement of workpieces and measuring equipment — Part 5: Decision rules for proving conformity or non-conformity with specifications for features of size based on maximum material requirement (MMR), least material requirement (LMR) and reciprocity requirement (RPR) principles