G01R - Definition 
Definition statement
This subclass covers:
Measuring electric variables or properties.
Measuring electric variables directly, e.g. electromechanical instruments (see Glossary of terms) where the measured electric variables directly affect the indication of the measured value.
Measuring electric variables by derivation from other electric variables, i.e. arrangements (see Glossary of terms) involving circuitry to obtain an indication of a measured value by deriving, calculating or otherwise processing electric variables, e.g. by comparison with another value.
Measuring or investigating electric properties of materials.
Electric testing of analogue or digital electric devices, apparatus or networks, or measuring their characteristics.
Indicating presence or sign of current or voltage.
The following technical subjects are therefore covered, the list being non-exhaustive:
- measuring time integral of electric power or current, e.g. of consumption;
- displaying electric variables or waveforms;
- measuring currents or voltages or for indicating presence or sign thereof;
- measuring electric power or power factor;
- measuring time integral of electric power or current, e.g. by electronic methods;
- measuring frequencies; analysing frequency spectra;
- measuring phase angle between a voltage and a current or between voltages or currents;
- measuring resistance, reactance, impedance, or electric characteristics derived therefrom;
- testing electric properties of apparatus, such as discharge tubes, amplifiers, transistors, integrated circuits;
- locating electric faults;
- electrical testing characterised by what is being tested not provided for elsewhere;
- testing for digital signal parameters (delay, skew, signal level) and characterization of device performance by use of test patterns; test apparatus or integrated test circuits therefor; methods for test pattern generation;
- details, testing or calibration of related instruments or arrangements.
Measuring magnetic variables or properties.
Measuring magnetic variables.
Measuring or investigating magnetic properties of materials.
The following technical subjects are therefore covered, the list being non-exhaustive:
- measuring direction or amount of magnetic fields, or measuring characteristics of magnetic materials;
- apparatus based on magnetic resonance, e.g. NMR, MRI, EPR (i.e. ESR) (see Synonyms and Keywords) and not specially adapted for a particular application;
- details, testing or calibrating of related instruments or arrangements.
Relationship between large subject matter areas
Investigating electric variables or properties
This subclass covers measuring or investigating electric properties of materials, whereas measuring or investigating non-electric or non-magnetic properties of materials by the use of electric means is covered by group G01N 27/00.
Investigating magnetic variable or properties
This subclass also covers, under group G01R 33/00, measuring or investigating magnetic properties of materials, whereas measuring or investigating non-magnetic or non-electric properties of materials by the use of magnetic means is covered by group G01N 27/72.
In particular, group G01R 33/20 covers measuring magnetic variables/properties by using magnetic resonance, e.g. NMR, EPR or other spin effects, whereas investigating or analysing materials by using such spin effects is covered by group G01N 24/00.
References relevant to classification in this subclass
This subclass does not cover:
Indicating correct tuning of resonant circuits | H03J 3/12 |
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 A61B 5/04, A61B 5/05, A61B 5/053 Monitoring electric consumption of electrically-propelled vehicles B60L 3/00 Investigating non-electric or non-magnetic properties of materials by the use of electric means G01N 27/00 Electric prospecting or detecting G01V 3/00 Measuring atmospheric potential differences, e.g. due to electrical charges in clouds G01W 1/16 Measuring magnetic variables or properties Medical diagnosis by means of magnetic fields, e.g. involving ESR, NMR or MRI A61B 5/05, A61B 5/055 Ascertaining earth’s true or magnetic north for navigation or surveying purposes G01C 17/00 Magnetic resonance gyrometers G01C 19/60 Investigating or analysing materials by using NMR, EPR (i.e. ESR) or other spin effects G01N 24/00 Investigating non-electric or non-magnetic properties of materials by the use of magnetic means G01N 27/72 Measuring direction or magnitude of the magnetic earth’s field; Magnetic prospecting or detecting, e.g. well logging involving NMR G01V 3/00 Electrical testing characterised by what is being tested not provided for elsewhere (group G01R 31/00) Electric testing of control systems G05B 23/02 Testing computers during standby operation or idle time G06F 11/22 Testing of switches in structural association with the switches themselves H01H Testing discharge tubes during manufacture H01J 9/42 Testing or measuring semiconductors or solid state devices during manufacture or treatment H01L 21/66 Accumulators with integrated arrangements for testing condition H01M 10/48 Testing of A/D or D/A conversion H03M 1/10 Testing line transmission systems H04B 3/46 Testing arrangements of data switching networks H04L 12/26 Testing arrangements of telephone substation equipments H04M 1/24 Testing of television systems or details thereof H04N 17/00 Testing arrangements of loudspeakers, microphones or similar electromechanical transducers H04R 29/00 Testing lamps structurally associated with light source circuit arrangements for detecting lamp failure H05B 37/03 Informative references Attention is drawn to the following places, which may be of interest for search: Measuring electric variables or properties Electrotherapy A61N 1/00 Measuring not specially adapted for a specific variable G01D Tariff metering apparatus G01D 4/00 Measuring temperature based on the use of electric elements directly sensitive to heat G01K 7/00 Systems for regulating electric variables G05F 1/00 - G05F 5/00 Image data processing or generation G06T Monitoring of signal or alarm line circuits, e.g. signalling of line faults G08B 29/06 Electric switches; Emergency protective devices H01H Cathode-ray tubes H01J 31/00 Thermo-electric solid state devices H01L 35/00, H01L 37/00 Emergency protective circuit arrangements H02H Circuit arrangements for charging, or depolarising batteries or for supplying loads from batteries H02J 7/00 Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing dynamo-electric machines H02K 15/00 Generation of oscillations H03B Modulation H03C Frequency discriminators; Phase discriminators H03D Amplifiers H03F Impedance networks, e.g. resonant circuits; Resonators H03H Tuning resonant circuits; Selecting resonant circuits H03J Pulse technique H03K A/D or D/A conversion H03M 1/00 Housings for electric apparatus H05K Screening of electric apparatus or components against electric fields H05K 9/00 Arrangements for monitoring manufacture of assemblages of electric components H05K 13/08 Measuring magnetic variables or properties Magnetotherapy A61N 2/00 Measuring not specially adapted for a specific variable G01D Measuring temperature based on the use of magnetic elements directly sensitive to heat G01K 7/36 Systems for regulating magnetic variables G05F 7/00 Image data processing or generation G06T Superconducting magnets H01F 6/00 Magnets H01F 7/00 Thermo-magnetic solid state devices H01L 35/00, H01L 37/00 Devices using galvano-magnetic or similar magnetic effects, e.g. Hall effect H01L 43/00 Antennas, i.e. radio aerials H01Q Screening of electric apparatus or components against magnetic fields H05K 9/00
Glossary of terms In this subclass, the following terms or expressions are used with the meaning indicated:
Synonyms and Keywords In patent documents the following abbreviations are often used: Electron paramagnetic resonance Electron spin resonance Nuclear magnetic resonance Magnetic resonance imaging Magnetic resonance spectroscopy Nuclear quadrupole resonance
Measuring properties
can also be interpreted as investigating properties.
Instruments or measuring instruments
means electro-mechanical measuring mechanisms.
Arrangements for measuring
means apparatus, circuits, or methods for measuring.
EPR ESR NMR MRI MRS NQR