Direct acting indicating analogue electrical-measuring instruments and their accessories - Part 1: Definitions and general requirements common to all parts (IEC 60051-1:1997); German version EN 60051-1:1998— 25 стр.
Direct acting indicating analogue electrical measuring instruments and their accessories; part 9: recommended test methods (IEC 60051-9:1988, edition 4); german version EN 60051-9:1989— 24 стр.
Electrical measuring instruments - X-t recorders - Part 2: Recommended additional test methods (IEC 61143-2:1992); German version EN 61143-2:1994— 6 стр.