MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES

Introduced: September 1968

Classification Context

Section:: PHYSICS
Class:: MEASURING; TESTING
Subclass:: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES

Description

G01R covers instruments and methods for measuring electrical quantities (voltage, current, resistance, power, energy, frequency, phase) and magnetic properties (magnetic field strength, flux density, permeability). This subclass encompasses analog and digital measuring devices, meters, oscilloscopes, multimeters, and associated test equipment used in electrical installations, power systems, and electronic circuits. The classification includes both direct measurement techniques and indirect determination of electrical parameters through calculation or conversion. Adjacent classes G01P (velocity/acceleration measurement) and G01N (materials testing) address mechanical motion and material properties respectively, while G01R focuses exclusively on electromagnetic variables.

Scope Notes

Glossary: measuring properties measuring property can also be interpreted as investigating properties. instruments measuring instruments instrument measuring instrument means electro-mechanical measuring mechanisms. arrangements for measuring arrangement for measuring means apparatus, circuits or methods for measuring. | Limiting references: Indicating correct tuning of resonant circuits Measuring electric variables or properties . Medical diagnosis by electric means, e.g. by measuring bioelectric currents or voltages, or the impedance of a part of the body , , Monitoring electric consumption of electrically-propelled vehicles Investigating non-electric or non-magnetic properties of materials by the use of electric means Electric prospecting or detecting Measuring atmospheric potential differences, e.g. due to electrical charges in clouds Measuring magnetic variables or properties . Medical diagnosis by means of magnetic fields, e.g. involving ESR, NMR or MRI , Ascertaining earth’s true or magnetic north for navigation or surveying purposes Magnetic resonance gyrometers Investigating or analysing materials by using NMR, EPR (i.e. ESR) or other spin effects Investigating non-electric or non-magnetic properties of materials by the use of magnetic means Measuring direction or magnitude of the magnetic earth’s field; Magnetic prospecting or detecting, e.g. well logging involving NMR Electric testing of control systems Testing computers during standby operation or idle time Testing of switches in structural association with the switches themselves Testing discharge tubes during manufacture Accumulators with integrated arrangements for testing condition Testing of A/D or D/A conversion Testing line transmission systems Testing arrangements of data switching networks Testing arrangements of telephone substation equipments Testing of television systems or details thereof Testing arrangements of loudspeakers, microphones or similar electromechanical transducers Testing lamps structurally associated with light source circuit arrangements for detecting lamp failure , Testing or measuring semiconductors or solid-state devices during manufacture or treatment

Related Keywords

CIRCUITS for measuring variablesinvestigating electrical CONDUCTIVITY of materialsmeasuring of electric CURRENT(S)measuring ELECTROMOTIVEmeasuring electric ENERGYmeasuring electric or magnetic FIELD(S)GALVANOMETERSINSTRUMENT(S) for measuring electric valuesproviding INTEGRATION of measured values in electric instrumentsinvestigating electric or magnetic properties of MATERIALSMETERS for measuring electric valuesOHM-METERSmeasuring POTENTIAL in circuitsmeasuring POWER factor (electric)investigating electric or magnetic PROPERTIES of materialsmeasuring VOLTAGE; voltmeters

19 direct subcodes

Child Classifications

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G01R 1/00 Details of instruments or arrangements of the types covered by groups or
G01R 11/00 Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
G01R 13/00 Arrangements for displaying electric variables or waveforms
G01R 15/00 Details of measuring arrangements of the types provided for in groups , or
G01R 17/00 Measuring arrangements involving comparison with a reference value, e.g. bridge
G01R 19/00 Arrangements for measuring currents or voltages or for indicating presence or sign thereof
G01R 21/00 Arrangements for measuring electric power or power factor
G01R 22/00 Arrangements for measuring time integral of electric power or current, e.g. electricity meters
G01R 23/00 Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
G01R 25/00 Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
G01R 27/00 Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
G01R 29/00 Arrangements for measuring or indicating electric quantities not covered by groups
G01R 3/00 Apparatus or processes specially adapted for the manufacture of measuring instruments
G01R 31/00 Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
G01R 33/00 Arrangements or instruments for measuring magnetic variables
G01R 35/00 Testing or calibrating of apparatus covered by the other groups of this subclass
G01R 5/00 Instruments for converting a single current or a single voltage into a mechanical displacement
G01R 7/00 Instruments capable of converting two or more currents or voltages into a single mechanical displacement
G01R 9/00 Instruments employing mechanical resonance