The document specifies standard properties for the scales for plotting frequency characteristics and polar diagrams.
DIN IEC 60263:1999 history
2021DIN EN IEC 60263:2021 Scales and sizes for plotting frequency characteristics and polar diagrams (IEC 60263:2020); German version EN IEC 60263:2020
2020DIN EN IEC 60263:2020 Scales and sizes for plotting frequency characteristics and polar diagrams (IEC 29/1038/CDV:2019); German and English version prEN IEC 60263:2019