This recommendation applies to the following apparatus:
— supply apparatus with stabilization, which is designed to supply calibrated values of voltage and/or current in connection with electrical measurement;
— accessories used with this apparatus.
Note. — A supply apparatus designed to supply calibrated values is characterized by having a specified accuracy under reference conditions, which is of the order of its stabilization. To apparatus falling within this scope, the same performance concept is applied as to electronic measuring equipment in general. The opposite case is a supply apparatus having an accuracy under reference conditions which is appre-ciably lower than its stabilization performance. It is not advisable to specify such apparatus in accordance with this recommendation.
According to the output quantity, this supply apparatus may be of one or more of the following kinds:
— d.c. supply with stabilized voltage;
— a.c. supply with stabilized voltage;
— d.c. supply with stabilized current;
— a.c. supply with stabilized current.
Safety requirements are dealt with in I EC Publication 348, Safety Requirements for Electronic Measuring Apparatus.
Throughout this recommendation, the term "supply apparatus" or "apparatus" only has been used to cover any apparatus and accessory according to the scope.
SIS SS IEC 443:1981 history
1981SIS SS IEC 443:1981 Electronic measuring equipment — Stabilized supply apparatus for measurement