Expression of performance of gas analyzers - Part 7: Tuneable semiconductor laser gas analyzers (IEC 61207-7:2013); German version EN 61207-7:2013— 26 стр.
Operating conditions for industrial-process measurement and control equipment - Part 2: Power (IEC 60654-2:1979 + A1:1992); German version HD 413.2 S2:1994