G01DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLEARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASSTARIFF METERING APPARATUSMEASURING OR TESTING NOT OTHERWISE PROVIDED FORThis subclass covers : devices for indicating or recording the results of measurements, not peculiar to variables covered by a single other subclass; analogous apparatus but in which the input is not a variable to be measured, e.g. a hand operation; details of measuring instruments, which are of general interest; measurement transducers not adapted solely for the measurement of a single specified variable and not provided for elsewhere, i.e. means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; measuring or testing not otherwise provided for.Attention is drawn to the Notes following the title of class G01.In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme. G01D1/00 G01D1/00Measuring arrangements giving results other than momentary value of variable, of general application G01D3/00 takes precedence; in tariff metering apparatus G01D4/00; transducers not specially adapted for a specific variable G01D5/00 G01D1/02giving mean values, e.g. root means square values measuring root mean square values of currents or voltages G01R19/02 G01D1/04giving integrated values giving mean values G01D1/02 G01D1/06by intermittent summation G01D1/08over fixed periods of time G01D1/10giving differentiated values G01D1/12giving a maximum or minimum of a value G01D1/14giving a distribution function of a value, i.e. number of times the value comes within specified ranges of amplitude G01D1/16giving a value which is a function of two or more values, e.g. product or ratio G01D1/18with arrangements for signalling that a predetermined value of an unspecified parameter has been exceeded G01D1/14 takes precedence G01D3/00Indicating or recording apparatus with provision for the special purposes referred to in the subgroups G01D3/02with provision for altering or correcting the law of variation G01D3/021using purely analogue techniques G01D3/022having an ideal characteristic, map or correction data stored in a digital memory G01D3/024for range changeArrangements for substituting one sensing member by another G01D3/028mitigating undesired influences, e.g. temperature, pressure G01D3/032affecting incoming signal, e.g. by averaginggating undesired signals G01D3/036on measuring arrangements themselves G01D3/0365the undesired influence being measured using a separate sensor, which produces an influence related signal G01D3/06with provision for operation by a null method G01D3/063Comparing the measuring value with a reference value which periodically or incidentally scans the measuring range G01D3/066Balancing a force which represents the measuring value, by means of a reference force G01D3/08with provision for safeguarding the apparatus, e.g. against abnormal operation, against breakdown G01D3/10with provision for switching-in of additional or auxiliary indicators or recorders G01D4/00Tariff metering apparatus in taximeters G07B13/00; apparatus actuated by coins, cards or the like with meter-controlled dispensing of liquid, gas, or electricity G07F15/00 G01D4/002Remote reading of utility meters G01D4/004Remote reading of utility meters to a fixed location G01D4/006Remote reading of utility meters to a non-fixed location, i.e. mobile location G01D4/008Modifications to installed utility meters to enable remote reading G01D4/02Details G01D4/04Resetting-mechanisms, e.g. for indicating members G01D4/06Arrangement of clutches between driving and indicating member, e.g. of hysteresis clutch G01D4/04 takes precedence G01D4/08Transfer of indication from a counter into a summing counter G01D4/10Maximum indicating or recording apparatus, i.e. where the tariff for a period is based on a maximum demand within that period G01D4/12Apparatus for indicating or recording progressive maximum G01D4/14Fixed-demand indicating or recording apparatus, i.e. where indication is made when a predetermined quantity has been consumed during a time interval greater or less than a predetermined time interval G01D4/16Apparatus for indicating or recording maximum or minimum load hours G01D4/18Apparatus for indicating or recording overconsumption with opposing torque which comes into effect when a predetermined level is exceeded, e.g. subtraction meters G01D5/00Mechanical means for transferring the output of a sensing memberMeans for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for convertingTransducers not specially adapted for a specific variable G01D3/00 takes precedence; specially adapted for apparatus giving results other than momentary value of variable G01D1/00The subgroups of this main group are distinguished by the means which is of major importance. Thus the mere application of other means for giving a final indication does not affect the classification. G01D5/02using mechanical means G01D5/04using leversusing camsusing gearing G01D5/06acting through a wall or enclosure, e.g. by bellows, by magnetic coupling G01D5/08Reducing the effects of friction, e.g. by applying vibrations G01D5/10Applying external forces to increase force available for operation of indicating or recording part G01D5/12using electric or magnetic means G01D5/06 takes precedence G01D5/125characterised by a first part whose movement represents the measuring value, and by a second part which is moved by an external force in order to follow the movement of the first part G01D5/14influencing the magnitude of a current or voltage G01D5/142using Hall-effect devices measuring magnetic variables using Hall-effect or other galvanomagnetic devices G01R33/06 G01D5/145influenced by the relative movement between the Hall device and magnetic fields see G01R33/06 G01D5/147influenced by the movement of a third element, the position of Hall device and the source of magnetic field being fixed in respect to each other G01D5/16by varying resistance G01D5/165by relative movement of a point of contact or actuation and a resistive track G01D5/1655more than one point of contact or actuation on one or more tracks G01D5/18by varying effective impedance of discharge tubes or semiconductor devicesGroup G01D5/18 is impacted by reclassification into groups G01D5/183 and G01D5/185.
Groups G01D5/18, G01D5/183 and G01D5/185 should be considered in order to perform a complete search. G01D5/183Sensing rotation or linear movement using strain, force or pressure sensorsGroups G01D5/183 and G01D5/185 are incomplete pending reclassification of documents from group G01D5/18.
Groups G01D5/18, G01D5/183 and G01D5/185 should be considered in order to perform a complete search. G01D5/185using piezoelectric sensors G01D5/20by varying inductance, e.g. by a movable armature G01D5/2006by influencing the self-induction of one or more coils G01D5/22 takes precedence G01D5/2013by a movable ferromagnetic element, e.g. a core G01D5/2033 takes precedence G01D5/202by movable a non-ferromagnetic conductive element G01D5/2033 takes precedence G01D5/2026constituting a short-circuiting element G01D5/2033controlling the saturation of a magnetic circuit by means of a movable element, e.g. a magnet G01D5/204by influencing the mutual induction between two or more coils G01D5/22 takes precedence G01D5/2046by a movable ferromagnetic element, e.g. a core G01D5/2053by a movable non-ferromagnetic conductive element G01D5/206constituting a short-circuiting element G01D5/2066by movement of a single coil with respect to a single other coil G01D5/2073by movement of a single coil with respect to two or more coils G01D5/208using polyphase currents G01D5/2086by movement of two or more coils with respect to two or more other coils G01D5/2093using polyphase currents G01D5/22differentially influencing two coils G01D5/2208by influencing the self-induction of the coils G01D5/2216by a movable ferromagnetic element, e.g. a core G01D5/2225by a movable non-ferromagnetic conductive element G01D5/2233constituting a short-circuiting element G01D5/2241by controlling the saturation of a magnetic circuit by means of a movable element, e.g. a magnet G01D5/225by influencing the mutual induction between the two coils G01D5/2258by a movable ferromagnetic element, e.g. core G01D5/2266specially adapted circuits therefor G01D5/2275by a movable non-ferromagnetic conductive element G01D5/2283constituting a short-circuiting element G01D5/2291Linear or rotary variable differential transformers (LVDTs/RVDTs) having a single primary coil and two secondary coils G01D5/24by varying capacitanceGroup G01D5/24 is impacted by reclassification into group G01D5/2403.
Groups G01D5/24 and G01D5/2403 should be considered in order to perform a complete search. G01D5/2403by moving plates, not forming part of the capacitor itself, e.g. shieldsGroup G01D5/2403 is incomplete pending reclassification of documents from groups G01D5/24, G01D5/241, G01D5/2412 and G01D5/2415.
Groups G01D5/24, G01D5/241, G01D5/2412, G01D5/2415 and G01D5/2403 should be considered in order to perform a complete search. G01D5/2405by varying dielectric G01D5/241by relative movement of capacitor electrodesGroups G01D5/241, G01D5/2412 and G01D5/2415 are impacted by reclassification into group G01D5/2403.
Groups G01D5/241, G01D5/2412, G01D5/2415 and G01D5/2403 should be considered in order to perform a complete search. G01D5/2412by varying overlap G01D5/2415adapted for encoders G01D5/2417by varying separation G01D5/242by carrying output of an electrodynamic device, e.g. a tachodynamo G01D5/243influencing the phase or frequency of ac G01D5/244influencing characteristics of pulses or pulse trainsgenerating pulses or pulse trains G01D5/24404Interpolation using high frequency signals G01D5/24409Interpolation using memories G01D5/24414Encoders having selectable interpolation factors G01D5/24419Interpolation not coverd by groups G01D5/24404, G01D5/24409 or G01D5/24414 G01D5/24423Mounting means or means for restraining during shipping G01D5/24442 takes precedence G01D5/24428Error prevention G01D5/24433by mechanical means G01D5/24438Special design of the sensing element or scale G01D5/24442by mounting means G01D5/24447by energy backup G01D5/24457Failure detection G01D5/24461by redundancy or plausibility G01D5/24466Comparison of the error value to a threshold G01D5/24471Error correction G01D5/24476Signal processing G01D5/2448 - G01D5/24495 take precedence G01D5/2448Correction of gain, threshold, offset or phase control G01D5/24485using other sensors G01D5/2449using hard-stored calibration data G01D5/24495using previous values G01D5/245using a variable number of pulses in a train G01D5/2451Incremental encoders G01D5/2454 takes precedence G01D5/2452incorporating two or more tracks having an (n, n+1, ...) relationship G01D5/2454Encoders incorporating incremental and absolute signals G01D5/2455with incremental and absolute tracks on the same encoder G01D5/2457Incremental encoders having reference marks G01D5/2458with incremental and absolute tracks on separate encoders G01D5/246by varying the duration of individual pulses G01D5/247using time shifts of pulses G01D5/248by varying pulse repetition frequency G01D5/249using pulse code G01D5/2492Pulse stream G01D5/2495Pseudo-random code G01D5/2497Absolute encoders G01D5/2454 takes precedence G01D5/25Selecting one or more conductors or channels from a plurality of conductors or channels, e.g. by closing contacts G01D5/251one conductor or channel G01D5/2515with magnetically controlled switches, e.g. by movement of a magnet G01D5/252a combination of conductors or channels G01D5/2525with magnetically controlled switches, e.g. by movement of a magnet G01D5/26characterised by optical transfer means, i.e. using infra-red, visible, or ultra-violet light G01D5/262with optical projection of a pointer or a scale G01D5/264Mechanical constructional elements therefor G01D5/28, G01D5/32, G01D5/39 and G01D5/40 take precedence; Mechanical adjustment thereof G01D5/266by interferometric means G01D5/353 takes precedence G01D5/268using optical fibres G01D5/28 - G01D5/38 take precedence G01D5/28with deflection of beams of light, e.g. for direct optical indication G01D5/40 takes precedence; mechanical adjustment G01D5/264 G01D5/285using a movable mirror G01D5/30the beams of light being detected by photocells G01D5/305controlling the movement of a following part G01D5/32with attenuation or whole or partial obturation of beams of light G01D5/40 takes precedence ; mechanical adjustment G01D5/264 G01D5/34the beams of light being detected by photocells G01D5/341controlling the movement of a following part G01D5/342the sensed object being the obturating part G01D5/344using polarisation G01D5/35303 takes precedence G01D5/345Polarising encoders G01D5/347using displacement encoding scales G01D5/34707Scales; Discs, e.g. fixation, fabrication, compensation G01D5/34715Scale reading or illumination devices G01D5/34723involving light-guides G01D5/3473Circular or rotary encoders G01D5/34738Axles; Driving or coupling means G01D5/34746Linear encoders G01D5/34753Carriages; Driving or coupling means G01D5/34761Protection devices, e.g. caps; Blowing devices G01D5/34769Sealing means G01D5/34776Absolute encoders with analogue or digital scales G01D5/34784with only analogue scales or both analogue and incremental scales G01D5/34792with only digital scales or both digital and incremental scalesGroup G01D5/34792 is impacted by reclassification into group G01D5/34794.
Groups G01D5/34792 and G01D5/34794 should be considered in order to perform a complete search. G01D5/34794Optical encoders using the Vernier principle, i.e. incorporating two or more tracks having a (n, n+1, ...) relationshipGroup G01D5/34794 is incomplete pending reclassification of documents from group G01D5/34792.
Groups G01D5/34792 and G01D5/34794 should be considered in order to perform a complete search. G01D5/353influencing the transmission properties of an optical fibre G01D5/35303using a reference fibre, e.g. interferometric devices G01D5/35306using an interferometer arrangement G01D5/35309using multiple waves interferometer G01D5/35312using a Fabry Perot G01D5/35316using a Bragg gratings G01D5/35319using other multiple wave interferometer G01D5/35322using interferometer with one loop with several directions of circulation of the light, e.g. Sagnac interferometer G01D5/35325using interferometer with two arms in reflection, e.g. Mickelson interferometer G01D5/35329using interferometer with two arms in transmission, e.g. Mach-Zender interferometer G01D5/35332using other interferometers G01D5/35335Aspects of emitters or receivers used by an interferometer in an optical fibre sensor arrangement using multiple sensor devices using multiplexing techniques G01D5/35383 G01D5/35338using other arrangements than interferometer arrangements G01D5/35341Sensor working in transmission G01D5/35345using Amplitude variations to detect the measured quantity G01D5/35348using stimulated emission to detect the measured quantity G01D5/35351using other means to detect the measured quantity G01D5/35354Sensor working in reflection G01D5/35358using backscattering to detect the measured quantity G01D5/35361using elastic backscattering to detect the measured quantity, e.g. using Rayleigh backscattering G01D5/35364using inelastic backscattering to detect the measured quantity, e.g. using Brillouin or Raman backscattering G01D5/35367using reflected light other than backscattered to detect the measured quantity G01D5/3537Optical fibre sensor using a particular arrangement of the optical fibre itself G01D5/35374Particular layout of the fiber G01D5/35377Means for amplifying or modifying the measured quantity G01D5/3538using a particular type of fiber, e.g. fibre with several cores, PANDA fiber, fiber with an elliptic core or the like G01D5/35383using multiple sensor devices using multiplexing techniques G01D5/35387using wavelength division multiplexing G01D5/3539using time division multiplexing G01D5/35393using frequency division multiplexing G01D5/35396using other forms of multiplexing G01D5/36Forming the light into pulses G01D5/363Direction discrimination G01D5/366Particular pulse shapes G01D5/38by diffraction gratings G01D5/39Scanning a visible indication of the measured value and reproducing this indication at the remote place, e.g. on the screen of a cathode ray tube mechanical adjustment G01D5/264 G01D5/40specially adapted for use with infra-red light mechanical adjustment G01D5/264 G01D5/42using fluid means G01D5/425characterised by a first part whose movement represents the measuring value, and by a second part which is moved by an external force in order to follow the movement of the first part G01D5/44using jets of fluid G01D5/46by deflecting or throttling the flow G01D5/48using wave or particle radiation means G01D5/26 takes precedence G01D5/485using magnetostrictive devices G01D5/50derived from a radioactive source G01D5/52detected by a counter tube G01D5/54using means specified in two or more of groups G01D5/02, G01D5/12, G01D5/26, G01D5/42, and G01D5/48For a combination of two or more of the means specified, the first applicable one of the subgroups below takes precedence over any others of these groups.Classification is made in this group only if no other group can be selected as being predominantly applicable. G01D5/56using electric or magnetic means G01D5/58using optical means, i.e. using infra-red, visible or ultra-violet light G01D5/60using fluid means G01D5/62using wave or particle radiation means not covered by group G01D5/58 G01D7/00Indicating measured values G01D7/002giving both analog and numerical indication G01D7/005Indication of measured value by colour change G01D7/007Indication of measured value by tactile means G01D7/02Indicating value of two or more variables simultaneously G01D7/04using a separate indicating element for each variable G01D7/06Luminous indications projected on a common screen G01D7/08using a common indicating element for two or more variables G01D7/10giving indication in co-ordinate form G01D7/12Audible indication of meter readings, e.g. for the blind G01D9/00Recording measured values G01D9/005Solid-state data loggersGroup G01D9/005 is impacted by reclassification into group G01D9/007.
Groups G01D9/005 and G01D9/007 should be considered in order to perform a complete search. G01D9/007Data loggers attached to transport containers for perishable products, e.g. food or medicinesGroup G01D9/007 is incomplete pending reclassification of documents from group G01D9/005.
Groups G01D9/005 and G01D9/007 should be considered in order to perform a complete search. G01D9/02Producing one or more recordings of the values of a single variable G01D9/04with provision for multiple or alternative recording G01D9/06Multiple recording, e.g. duplicating G01D9/08giving both graphical and numerical recording G01D9/10the recording element, e.g. stylus, being controlled in accordance with the variable, and the recording medium, e.g. paper roll, being controlled in accordance with time G01D9/12recording occurring continuously G01D9/14with provision for altering speed of recording medium in accordance with the magnitude of the variable to be recorded G01D9/16recording occurring at separated intervals, e.g. by chopper bar G01D9/18recording element actuated only upon change in value of variable G01D9/20the recording element, e.g. stylus, being controlled in accordance with time and the recording medium, e.g. paper roll, being controlled in accordance with the variable G01D9/22recording occurring continuously G01D9/24recording occurring at separated intervals, e.g. by chopper bar G01D9/26either the recording element, e.g. stylus, or the recording medium, e.g. paper roll, being controlled in accordance with both time and the variable G01D9/28Producing one or more recordings, each recording being of the values of two or more different variables G01D9/38, G01D9/40 take precedence G01D9/285producing additional marks (e.g. reference lines time marks) G01D9/30there being a separate recording element for each variable, e.g. multiple-pen recorder G01D9/32there being a common recording element for two or more variables G01D9/34the variables being recorded in a predetermined sequence G01D9/36in separate columns G01D9/38Producing one or more recordings, each recording being produced by controlling the recording element, e.g. stylus, in accordance with one variable and controlling the recording medium, e.g. paper roll, in accordance with another variable G01D9/40Producing one or more recordings, each recording being produced by controlling either the recording element, e.g. stylus or the recording medium, e.g. paper roll, in accordance with two or more variables G01D9/42Recording indications of measuring instruments by photographic means, e.g. of counters G01D11/00Component parts of measuring arrangements not specially adapted for a specific variable G01D13/00, G01D15/00 take precedence G01D11/02Bearings or suspensions for moving parts G01D11/04Knive-edge bearings G01D11/06Strip or thread suspensions, e.g. in tension G01D11/08Elements for balancing moving parts G01D11/10Elements for damping the movement of parts G01D11/12using fluid damping G01D11/14using magnetic induction damping G01D11/16Elements for restraining, or preventing the movement of, parts, e.g. for zeroising caging of moving parts when not in use G01D11/20 G01D11/18Springs G01D11/06 takes precedence G01D11/20Caging devices for moving parts when not in use G01D11/22automatically actuated G01D11/24Housings ; Casings for instruments G01D11/245Housings for sensors G01D11/26WindowsCover glassesSealings therefor G01D11/28Structurally-combined illuminating devices G01D11/30Supports specially adapted for an instrumentSupports specially adapted for a set of instruments G01D11/305Panel mounting of instruments G01D13/00Component parts of indicators for measuring arrangements not specially adapted for a specific variable G01D13/02ScalesDials G01D13/04Construction G01D13/06Moving bands G01D13/10 takes precedence G01D13/08Rotating drums G01D13/10 takes precedence G01D13/10with adjustable scaleswith auxiliary scales, e.g. vernier G01D13/12Graduation G01D13/14for rotations of more than 360 degrees G01D13/16with staggered markings G01D13/18with raised or recessed markings G01D13/20with luminescent markings G01D13/22Pointers, e.g. settable pointer G01D13/24for indicating a maximum or minimum G01D13/26adapted to perform a further operation, e.g. making electrical contact G01D13/265Pointers which conduct light G01D13/28with luminescent markings G01D15/00Component parts of recorders for measuring arrangements not specially adapted for a specific variable G01D15/005Effaceable recording G01D15/02Styli or other recording elements acting to mechanically deform or perforate the recording surface printing recording elements G01D15/20 G01D15/04acting to punch holes in the recording surface G01D15/06Electric recording elements, e.g. electrolytic G01D15/08for spark erosion G01D15/10Heated recording elements acting on heatsensitive layers G01D15/12Magnetic recording elements G01D15/14Optical recording elementsRecording elements using X-or nuclear radiation G01D15/16Recording elements transferring recording material, e.g. ink, to the recording surface printing recording elements G01D15/20 G01D15/18Nozzles emitting recording material G01D15/20Recording elements for printing with ink or for printing by deformation or perforation of the recording surface, e.g. embossing G01D15/22Chopper bars for bringing recording element into contact with recording surface G01D15/24Drives for recording elements and surfaces not covered by G01D5/00 G01D15/26operating by clockwork G01D15/28Holding means for recording surfacesGuiding means for recording surfacesExchanging means for recording surfaces G01D15/30for foldable strip charts G01D15/32for circular charts G01D15/34Recording surfaces G01D15/342of circular shape G01D15/345of cylindrical shape G01D15/347Strip or Tape G01D18/00Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00 G01D18/001Calibrating encoders G01D18/002Automatic recalibration G01D18/008 takes precedence G01D18/004Continuous recalibration G01D18/006Intermittent recalibration G01D18/008with calibration coefficients stored in memory G01D21/00Measuring or testing not otherwise provided for G01D21/02Measuring two or more variables by means not covered by a single other subclass G01D2204/00Indexing scheme relating to details of tariff-metering apparatus G01D2204/10AnalysingDisplaying G01D2204/12Determination or prediction of behaviour, e.g. likely power consumption or unusual usage patterns G01D2204/125Utility meter reading systems specially adapted for determining the environmental impact of user behaviour G01D2204/14Displaying of utility usage with respect to time, e.g. for monitoring evolution of usage or with respect to weather conditions G01D2204/16Displaying of utility pricing or cost G01D2204/18Remote displaying of utility meter readings G01D2204/20MonitoringControlling G01D2204/22Arrangements for detecting or reporting faults, outages or leaks G01D2204/24Identification of individual loads, e.g. by analysing current/voltage waveforms G01D2204/26Remote utility meter reading systems with control function, i.e. reading systems including mechanisms for turning on/off the supply G01D2204/28Processes or tasks scheduled according to the power required, the power available or the power price G01D2204/30Remote utility meter reading systems specially adapted for metering the generated energy or power G01D2204/35Monitoring the performance of renewable electricity generating systems, e.g. of solar panels G01D2204/40NetworksTopology G01D2204/43Identification of a specific meter G01D2204/45Utility meters networked together within a single building G01D2204/47Methods for determining the topology or arrangement of meters in a network G01D2205/00Indexing scheme relating to details of means for transferring or converting the output of a sensing member G01D2205/10Detecting linear movement G01D2205/14by converting the linear movement into a rotary movement G01D2205/18using magnetic means not otherwise provided for in this subclass G01D2205/20Detecting rotary movement G01D2205/22by converting the rotary movement into a linear movement G01D2205/24using magnetic means not otherwise provided for in this subclass G01D2205/26Details of encoders or position sensors specially adapted to detect rotation beyond a full turn of 360°, e.g. multi-rotation G01D2205/28The target being driven in rotation by additional gears G01D2205/40Position sensors comprising arrangements for concentrating or redirecting magnetic flux G01D2205/50Grounding or electrostatically shielding a position sensor or encoder G01D2205/60Means for precisely aligning or centering the disk of a rotary encoder, e.g. fitting jigs G01D2205/70Position sensors comprising a moving target with particular shapes, e.g. of soft magnetic targets G01D2205/73Targets mounted eccentrically with respect to the axis of rotation G01D2205/77Specific profiles G01D2205/771Toothed profiles G01D2205/772Sawtooth profiles G01D2205/773Spiral profiles G01D2205/774Profiles with a discontinuity, e.g. edge or stepped profile G01D2205/775Tapered profiles G01D2205/776Cam-shaped profiles G01D2205/777Whorl-shaped profiles G01D2205/80Manufacturing details of magnetic targets for magnetic encoders G01D2205/85Determining the direction of movement of an encoder, e.g. of an incremental encoder G01D2205/90Two-dimensional encoders, i.e. having one or two codes extending in two directions G01D2205/95Three-dimensional encoders, i.e. having codes extending in three directions G01D2207/00Indexing scheme relating to details of indicating measuring values G01D2207/10Displays which are primarily used in aircraft or display aircraft-specific information G01D2207/20Displays for vehicles in which information is superimposed on an external view, e.g. heads-up displays or enhanced reality displays G01D2207/30Displays providing further information, in addition to measured values, e.g. status G01D2213/00Indexing scheme relating to constructional details of indicators G01D2213/10Drivers for gauges G01D2213/20Gauges having a single pointer and two or more scales G01D2218/00Indexing scheme relating to details of testing or calibration G01D2218/10Testing of sensors or measuring arrangements