ANALOGUE SIGNALS FOR PROCESS CONTROL SYSTEMS. PART 1: DIRECT CURRENT SIGNALS
Edition 1986-12-15

ANALOGUE SIGNALS FOR PROCESS CONTROL SYSTEMS. PART 2: DIRECT VOLTAGE SIGNALS
Edition 1986-12-15

ATTACHMENTS TO PUBLIC SWITCHED TELEPHONE NETWORK (PSTN). GENERAL TECHNICAL REQUIREMENTS FOR EQUIPMENT CONNECTED TO AN ANALOGUE SUBSCRIBER INTERFACE IN THE PSTN. PART 1: GENERAL.
Edition 1995-10-16

ATTACHMENTS TO PUBLIC SWITCHED TELEPHONE NETWORK (PSTN). GENERAL TECHNICAL REQUIREMENTS FOR EQUIPMENT CONNECTED TO AN ANALOGUE SUBSCRIBER INTERFACE IN THE PSTN. PART 2: ATTACHEMENT REQUIREMENTS TO THE SPANISH PSTN.
Edition 1995-10-16

ATTACHMENTS TO PUBLIC SWITCHED TELEPHONE NETWORK (PSTN). GENERAL TECHNICAL REQUIREMENTS FOR EQUIPMENT CONNECTED TO AND ANALOGUE SUBSCRIBER INTERFACE IN THE PSTN. PART 2: ATTACHMENT REQUIREMENTS TO THE SPANISH PSTN.
Edition 1998-04-17

Direct acting indicating analogue electrical measuring instruments and their accessories - Part 2: Special requirements for ammeters and voltmeters (Endorsed by Asociación Española de Normalización in June of 2021.)
Edition 2021-06-01

Direct acting indicating analogue electrical measuring instruments and their accessories - Part 3: Special requirements for wattmeters and varmeters (Endorsed by Asociación Española de Normalización in June of 2021.)
Edition 2021-06-01

Direct acting indicating analogue electrical measuring instruments and their accessories title - Part 4: Special requirements for frequency meters (Endorsed by Asociación Española de Normalización in June of 2021.)
Edition 2021-06-01

Direct acting indicating analogue electrical measuring instruments and their accessories - Part 5: Special requirements for phase meters, power factor meters and synchroscopes (Endorsed by Asociación Española de Normalización in May of 2018.)
Edition 2018-05-01

Direct acting indicating analogue electrical measuring instruments and their accessories - Part 6: Special requirements for ohmmeters (impedance meters) and conductance meters (Endorsed by Asociación Española de Normalización in May of 2018.)
Edition 2018-05-01