Tracked Changes. Direct acting indicating analogue electrical measuring instruments and their accessories. Definitions and general requirements common to all parts|Signal devices, Working range, Ohmmeters, Voltmeters, Power measurement (electric), Heating tests, Varmeters, Classification systems, Response time, Temperature, Magnetic fields, Instrument scales, Errors, Symbols, Electrical measurement, Wattmeters, Frequency measurement, Instrument shunts, Analogue signals, Vibration testing, Testing conditions, Accessories, Damping, Tolerances (measurement), Impact testing, Ammeters, Resistors, Phase measurement (electric), Impedance measurement, Accuracy, Electrical measuring instruments, Conformity, Indicating device components, Electrical testing, Marking