ISO 1938-1:2015
Geometrical product specifications (GPS) — Dimensional measuring equipment — Part 1: Plain limit gauges of linear size
ISO 1938-1:2015 specifies the most important metrological and design characteristics of plain limit gauges of linear size.
ISO 1938-1:2015 defines the different types of plain limit gauges used to verify linear dimensional specifications associated with linear size.
ISO 1938-1:2015 also defines the design characteristics and the metrological characteristics for these limit gauges as well as the new or wear limits state Maximum Permissible Limits (MPLs) for the new state or wear limits state for these metrological characteristics.
In addition, ISO 1938-1:2015 describes the use of limit gauges. It covers linear sizes up to 500 mm.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
3.1 Limits
3.2 Gauge types
3.3 Characteristics and function of gauges
4 Abbreviated terms and symbols
5 Design characteristics for gauges
6 Metrological characteristics
6.1 General
6.2 Metrological characteristic relative to the type of limit gauge (GO gauge or NO GO gauge)
7 Maximum permissible limits on metrological characteristics
7.1 General
7.2 Limit gauges for internal features of size
7.3 Limit gauges for external features of size
7.4 Values for calculation of MPL of limit gauges
8 Proving conformance with specification for limit gauges
9 Verification of dimensional specification of a workpiece with limit gauges
10 Marking
Annex A (informative) General principles and application of limit gauging
Annex B (informative) Description of the specific use of the various gauge types and the associated uncertainty
Annex C (informative) Relation to the GPS matrix model
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
3.1 Limits
3.2 Gauge types
3.3 Characteristics and function of gauges
4 Abbreviated terms and symbols
5 Design characteristics for gauges
6 Metrological characteristics
6.1 General
6.2 Metrological characteristic relative to the type of limit gauge (GO gauge or NO GO gauge)
7 Maximum permissible limits on metrological characteristics
7.1 General
7.2 Limit gauges for internal features of size
7.3 Limit gauges for external features of size
7.4 Values for calculation of MPL of limit gauges
8 Proving conformance with specification for limit gauges
9 Verification of dimensional specification of a workpiece with limit gauges
10 Marking
Annex A (informative) General principles and application of limit gauging
Annex B (informative) Description of the specific use of the various gauge types and the associated uncertainty
Annex C (informative) Relation to the GPS matrix model
Bibliography