G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
G01R17/00—Measuring arrangements involving comparison with a reference value, e.g. bridge
G01R17/02—Arrangements in which the value to be measured is automatically compared with a reference value
G01R17/06—Automatic balancing arrangements
G01R17/08—Automatic balancing arrangements in which a force or torque representing the measured value is balanced by a force or torque representing the reference value
G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
G01L19/08—Means for indicating or recording, e.g. for remote indication
Procede et dispositifs pour generer un courant alternatif secondaire dont l'intensite est proportionnelle a celle d'un courant primaire et compteurs equipes de ces dispositifs