ISO 1938-1:2015标准是一项关于尺寸测量设备的标准，主要涉及到平面限制量规的线性尺寸。平面限制量规是一种用于测量工件尺寸的工具，通常用于检验工件的尺寸是否符合要求。该标准规定了平面限制量规的尺寸、公差、材料、硬度、标记和包装等方面的要求，以确保其能够准确地测量工件的尺寸。

该标准规定了平面限制量规的尺寸范围，包括长度、宽度和厚度等方面的要求。此外，该标准还规定了平面限制量规的公差范围，以确保其能够满足测量要求。平面限制量规的材料应该是高质量的钢材或其他合适的材料，以确保其具有足够的硬度和耐用性。

该标准还规定了平面限制量规的硬度要求，以确保其能够在使用过程中保持稳定的尺寸和形状。平面限制量规应该标记清晰，以便于识别和追踪。此外，该标准还规定了平面限制量规的包装要求，以确保其在运输和存储过程中不受损坏。

总之，ISO 1938-1:2015标准是一项关于尺寸测量设备的标准，主要涉及到平面限制量规的线性尺寸。该标准规定了平面限制量规的尺寸、公差、材料、硬度、标记和包装等方面的要求，以确保其能够准确地测量工件的尺寸。

相关标准
- ISO 1938-2:2015 Geometrical product specifications (GPS) — Dimensional measuring equipment — Part 2: Plain limit gauges of angular size
- 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