Overview
ISO 13102:2012 is an ISO Geometrical Product Specification (GPS) standard that defines the design and metrological characteristics of electronic digital‑indicator gauges (digital test indicators). It specifies essential requirements to ensure reliable mechanical design, consistent digital display behavior, interchangeability of parts, and documented metrological performance for dimensional measuring equipment.
Key topics and technical requirements
- Scope: Specifies the most important design and metrological characteristics of electronic digital‑indicator gauges.
- Design characteristics
- General design, nomenclature and main dimensions (figures and Table 1 ensure interchangeability).
- Mechanical features: stem, bezel, plunger, contact element, mounting/attachment and protection cap.
- Digital indicating display: clear numeric display in any plunger position; unit and sign (negative) displayed.
- Error messages and user feedback (e.g., power or over‑speed warnings).
- Interface: manufacturers must describe electronic data transmission format and protocol where present.
- Field protection: manufacturers must state water/dust protection (IP code per IEC 60529) and electromagnetic protection if applicable.
- Zero adjustment: facility for setting zero at any measuring position.
- Optional/additional functions (preset, data storage, counting direction change) must be documented.
- Metrological characteristics
- Manufacturers must state Maximum Permissible Error (MPE) and Maximum Permissible Limits (MPL) for: hysteresis (H), repeatability (R), partial and total measuring‑range errors (P and E), resolution (digital step), and measuring forces (max/min).
- Example error diagram provided (Annex A) illustrating a 10 mm range with a 10 µm digital step.
- Marking: at minimum, measuring range, resolution (digital step) and unique serial number must be permanently and legibly marked.
- Conformance: Proving conformance follows ISO 14253‑1; uncertainty evaluated as per ISO 14253‑2 and ISO/IEC Guide 98‑3 (GUM).
Applications and practical value
- Ensures consistent performance, interchangeability and traceability of digital‑indicator gauges used in manufacturing, QC, inspection labs and calibration services.
- Helps purchasers and procurement teams compare products using standardized data sheets (Annex B).
- Guides manufacturers on required documentation, interfaces and protective ratings for field use.
- Useful for calibration labs to define test procedures and limits for acceptance and reporting.
Who should use this standard
- Metrology and calibration laboratories
- Quality control engineers and inspection technicians
- Gauge manufacturers and product designers
- Procurement specialists specifying dimensional measuring equipment
Related standards
Keywords: ISO 13102:2012, electronic digital‑indicator gauge, GPS, dimensional measuring equipment, MPE, MPL, measurement uncertainty, IP code, calibration, repeatability, hysteresis.
Open preview (PDF)Geometrical product specifications (GPS) — Dimensional measuring equipment: Electronic digital-indicator gauge — Design and metrological characteristics