IEC 61010-2-081:2019-Safety requirements for electrical equipment for measurement, IEC 60335-2-66:2002+AMD1:2008 CSV-Household and similar electrical appliances-Safety-Part 2-66: Particular requirements for water-bed heaters, IEC 60359:2001-Electrical and electronic measurement equipment-Expression of performance, IEC 61800-7-301:2015-Adjustable sp