This standard applies to pneumatic and electric industrial-process controllers using analogue continuous signals which are in accordance with current international standards. *
It should be noted that whilst the tests specified herein cover controllers having such signals, they can be applied in principle to controllers having different but continuous signals.
SIS SS IEC 546:1982 history
1982SIS SS IEC 546:1982 Process control - Controllers with analogue signals for industrial use - Tests