1998DS/EN 60654-4:1998 Operating conditions for industrial-process measurement and control equipment - Part 4: Corrosive and erosive influences
1989DS/IEC 654-4:1989 Operating conditions for industrial process measurement and control equipment. Part 4: Corrosive and erosive influence
DS/IEC 654-4:1989 Operating conditions for industrial process measurement and control equipment. Part 4: Corrosive and erosive influence was changed to DS/EN 60654-4:1998 Operating conditions for industrial-process measurement and control equipment - Part 4: Corrosive and erosive influences.