ISO 3611-2010 pdf free download.Geometrical product specifications (GPS) – Dimensional measuring equipment: Micrometers for external measurements – Design and metrological characteristics.
ISO 3611 specifies the most important design and metrological characteristics of micrometers for external measurements:
with analogue indication;
with digital indication: mechanical or electronic digital display.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 14253-1, Geometrical Product Specifications (GPS) — Inspection by measurement of workpieces and measuring equipment — Part 1: Decision rules for proving conformance or non-conformance with specifications
ISO 14253-2, 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 14978:2006, Geometrical product specifications (GPS) — General concepts and requirements for GPS measuring equipment
IEC 60529, Degrees of protection provided by enclosures (IP Code)
ISO/IEC Guide 98-3, Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM: 1995)
ISO/IEC Guide 99, International vocabulary of metrology — Basic and general concepts and associated terms
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 14978, ISO/IEC Guide 99 and the following apply.
3.1micrometer for external measurements
measuring instrument which gives the evaluation of a dimensional quantity of an external feature of a workpiece on the basis of movement of a spindle with a measuring face, moving relatively to a material measure and an anvil, with the movement generated by a screw thread
NOTE I The guiding elements of the spindle and of the anvil are connected by a frame.
NOTE 2 Usually, micrometers for external measurements have a thread as a material measure with the anvil, spindle and material measure arranged in a line.
3.2 measuring face contact contact between the measuring face and a feature of a workpiece
3.2.1 full measuring face contact contact between the full area of the measuring face and a feature of a workpiece
3.2.2 partial measuring face contact contact between a partial area of the measuring face and a feature of a workpiece
4 Design characteristics
4.1 General design and nomenclature
The general design and workmanship of the micrometer for external measurements shall be such that its metrological characteristics comply with the requirements of this International Standard under all operational orientations, unless otherwise specified by the manufacturer. See Figure 1 for the general design.ISO 3611 pdf download.