Abstract: An electronic energy meter register which, in one aspect, is configured to perform load profile recording in a manner which eliminates a need for a back-up battery is described. In other aspects, the present invention is a routine of operating a meter register for providing a cost savings and/or productivity gain when a utility customer relocates and for ensuring that load control commands are effectively executed. The register, in one embodiment, is configured to be coupled to a meter including an eddy current disk and shaft which rotate in response to the rate of energy consumption by a load being metered. The register, in the one embodiment, includes a microprocessor, a non-volatile memory, and a disk sensing optics assembly.

Abstract: The present invention includes an electrical utility meter operable to measure power consumption. The method detects and compensates for one or more wiring errors that affects the power consumption measurement of the electrical utility meter. The method includes the steps of: obtaining measured phase angle data for a plurality of phases in a polyphase electrical system; periodically performing one or more diagnostic tests using the measured phase angle data to determine whether a wiring error is present, automatically adjusting the operation of the electrical utility meter to effect a compensation for the wiring error, said compensation increasing an accuracy of power consumption measurement of the electrical utility meter. The meter is operable to detect and compensate for wiring errors including polarity errors and cross phasing errors. According to another method of the present invention, the meter is operable to determine automatically the service type to which it is connected.

Abstract: Disclosed is a method and arrangement for use in an electrical utility meter, the electrical utility meter operable to be connected to a plurality of electrical service types. The arrangement is operable to identify a present service type, the present service type being one of the plurality of electrical service types to which the electrical utility meter is connected. The arrangement comprises: conversion circuit for obtaining measured voltage magnitude and phase angle data for a plurality of phases in a polyphase electrical system; a memory; and a processor connected to said memory and said conversion circuit. The processor is operable to execute programming steps stored in the memory to receive the measured voltage magnitude and phase angle data from the conversion circuit and identify the present electrical service type based on the measured voltage magnitude and phase angle data.

Abstract: Current and voltage space vectors of the positive sequence system are formed from phase current and phase voltage sampling values of an electric power supply system, and power quantities of the positive sequence system are derived from them. System frequency components are eliminated from these power quantities by a least squares estimate, thus forming a measured active power quantity of the positive sequence system and a measured reactive power quantity of the positive sequence system. By forming quotients with a measured current quantity of the positive sequence system, also obtained using the least squares estimate, impedance values of the positive sequence system are also obtained. These are tested for monotony and abrupt changes and a suspected oscillation signal is formed, if applicable.

Abstract: An electricity meter includes measurement channels. In order to permit an extensive self monitoring of the measurement channels, input signals, in particular detected current signals and voltage signals, are detected in a double manner through different signal channels with sigma delta modulators. A plausibility monitoring of the detected signals takes place in a following digital signal processing device, wherein a corresponding error signal is generated depending on the type of malfunction or signal deviation.

Abstract: An electricity meter contains analog/digital converters to transform input analog voltages and currents into sampled digital values. A first high speed processor derives auxiliary magnitudes from the sampled digital values without intermediate storage. The auxiliary magnitudes, which do not have any direct physical significance, are provided to a lower speed second processor, which utilizes the auxiliary magnitudes to determine various desired parameters and functions of the input voltages and currents.

Abstract: A volt meter changes the dividing resistance across the terminals of a voltage source between first and second different resistances and measures voltage across the dividing resistor at the different resistances to determine an accurate voltage source magnitude from the measured voltages and the ratio of second to first resistances despite an unknown source resistance.

Abstract: A digital decaying current offset correction method and apparatus, in one aspect, separates the requirements of detecting fault existence from the requirements of detecting fault location. Once the decaying offset removal routine is initiated, current and voltage are sampled and, for each current and voltage sample, current and voltage phasors are generated. The current phasor values, which are not offset corrected, may be used to determine whether to trip a breaker. Once the breaker is tripped, the decaying offsets are removed from the current phasors. The offset corrected current phasors are then used to locate the fault.

Abstract: A process for measuring electricity consumption, especially suitable for small consumers, comprises the steps of continuously measuring consumer current, integrating the current with time to obtain a value (A.h) relating to consumption; adjusting the integration in function of the voltage of the network to obtain an adjusted value (A.sub.v.h) proportional to a preestablished unit of electricity consumption; and computing the number of preestablished units obtained to provide a value proportional to chargeable electricity consumption. The adjustment to the integration is carried out in accordance with four bands of network voltage, in the form of a nominal band on either side of the nominal network voltage, an overvoltage band, an extended voltage band below the nominal band, and an undervoltage band.

Abstract: A circuit for determining and reporting the energy consumed by an electronic device having a microprocessor and power supply lines for supplying power to the device is disclosed. The circuit comprises a voltage divider connected for sensing the voltage across the power supply lines and generating a voltage signal indicative of the sensed voltage. A current sense resistor is connected in series with a power supply line for sensing the current passing through the power supply lines and generating a current signal indicative of the sensed current. An analog multiplier is connected for receiving and computing the product of the voltage and current signals, and for generating a power signal indicative of the product of the voltage and current signals, the power signal being indicative of the power consumed by the device.

Abstract: The present invention relates to an electronic meter circuit for a time comparison measurement between two successive periodic events with which the signal time ratios between two times two successive events can be recognized by a simple method.The electronic meter circuits comprises a reference meter to be loaded with a reset value when a first event occurs and for reference meter to start to count at a clock frequency and when a second event occurs, reference meter starts to count in the opposite direction at a clock frequency until a third event occurs, and when the third event occurs, meter reading forms a reference value for the ratio of the signal times between the occurrence of the first and second events and between the second and third events.

Abstract: The method involves use of an instrument with at least one operational amplifier to sense the analog value first of a voltage, and then of the relative current, introducing a known delay and applying a reference voltage at the amplifier input to render all the signals positive. The analog values are then converted to digital voltage and current values and are corrected by subtracting the offset value of the operational amplifier, which is given by averaging the digital values. The instrument includes an analog-digital converter as one component of a data processing unit, which further incorporates a switch, a sample-and-hold circuit, a memory with an internal shift register, and a programmable control unit which is capable of shifting the compensated current into quadrature in such a manner as to allow a direct calculation of reactive power by way of the shift register.

Abstract: A method and apparatus for measuring and recording peak RMS electrical current over multiple moving-average time periods provides current-flow information in the same units used to characterize electrical system distribution components--primarily overcurrent protective devices such as fuses and circuit breakers. Rather than reporting current-flow information based on a series of brief observations of a few line cycles or seconds, short duration RMS current-flow information in multiple geometrically increasing time intervals is calculated and accumulated to form longer duration RMS values of current. The resulting set of peak RMS current-flow values properly characterizes both the long and short term heating effects of the electrical current in the circuit under inspection, and is used in direct side-by-side comparisons with manufacturer provided data for specific distribution components in the evaluation of usage versus capacity and other functions relevant to distribution system design.

Abstract: A multiple-meter driving system intends to cut down on the amount of space needed and to reduce the manufacturing cost by providing a single controller including a processing circuit, the controller being adapted collectively to drive a plurality of meters mounted in a vehicle such as motorcar or the like. Pulse signals each having a frequency corresponding to an input signal from a vehicle speed sensor or the like in the vehicle are counted with respect to their period T by a plurality of counters. The counts are then supplied to the controller. DC signals each corresponding to an input from a fuel sensor or the like are converted into digital signals by an A/D converter, which are also supplied to the controller. The processing circuit in the controller time-shares these input signals so as to perform operations of 1/T, sine and cosine. The results are again supplied back to the controller which in turn directs them to pulse width modulating circuits corresponding to the respective meters to be indicated.

Abstract: A method for testing gauges includes applying a rotation signal to the gauge. An AC input signal is superimposed on a first coil of the gauge. A second coil of the gauge is monitored to detect a coupled AC output signal. The rotational signal is varied while the AC output signal is monitored. The operational status of the gauge is determined responsive to the AC output signal and a process output signal indicative of the operational status is provided.

Abstract: An apparatus and method for measuring electrical energy and quadergy and for performing line frequency compensation includes a compensation integrated circuit for adjusting the determined reactive load quadergy, based on variations between the actual line frequency and the rated line frequency of the meter. Reactive load quadergy is determined by phase-shifting the line voltage by a fixed time interval, based on the rated line frequency of the meter. The determined reactive load quadergy is adjusted to compensate for variations in line frequency. Because the determined reactive load quadergy is output by an electric meter as a continuous pulse train, adjustment to the determined reactive load quadergy is performed by adding or subtracting state changes from the pulse train and then registering the adjusted reactive load quadergy.

Abstract: A pulse-width modulation system provides means for controlling dual-coil, air-core gauges over 360 degrees. The system moves a dial needle from one octant of the gauge to the next in response to coded data representing measurands by holding one coil at 100% duty cycle while applying a PWM of a varying duty signal to the other coil. When the magnitude of the measurand dictates that the needle should move into another octant of the dial, the PWM signal and the 100% duty cycle signal are interchanged between the coils in a manner permitting the needle to move to other octant of the dial.

Abstract: A method for measuring an unknown voltage (V.sub.IN) using a voltage divider network in such a way that uncertainties in the values of the resistances do not affect the measurement. The unknown voltage is divided into three fractional voltages, the fractional voltages are measured, and the unknown voltage is computed on the basis of the fractional voltages. The unknown voltage is divided with a voltage divider comprising first, second and third resistors, and a first voltage (V.sub.o1) is measured across the first resistor, a second voltage (V.sub.o2) is measured across the second resistor and a third voltage (V.sub.o3) is measured across the third resistor. The unknown voltage V.sub.IN is computed in accordance with the equations disclosed in the specification.

Abstract: A measuring device comprises at least two transducer units for sensing input quantities (A.sub.i) and for producing signals which are proportional to the logarithm of the input quantities. The measuring device also includes a normalization circuit which determines the ratio of a linear combination of input quantities to the sum of the input quantities. The normalization circuit thus comprises a number of first identical bipolar transistors which correspond to the number of input quantities. The transistors include a base, an emitter and a collector. An output signal of a transducer unit is applied to the base of the corresponding first transistor. The emitters of these transistors are collectively connected to a constant current source via an emitter junction.

Abstract: An apparatus for driving a gauge having coils in quadrature to generate a resultant magnetic field in accordance with currents applied thereto and having a pointer angularly swept by the field, the apparatus having a memory to store a first data defining a relationship between a first level, indicative of the current applied to one of the coils, and an angle of the pointer. The first level has a continous waveform varying in isoceles trapezoid form over an angle range of 0.degree. to 180.degree.. The first data varies symmetrically with the isoceles trapezoid wave at the 180.degree. pointer angle over an angle range of 180.degree. to 360.degree.. The memory is arranged to store second data defining a relationship between a second level indicative of the current applied to the other coil and the pointer angle. The second level has a continuous waveform phase shifted by 90.degree. from the continuous waveform of the first data.

Abstract: A broadband frequency meter probe utilizes a high frequency antenna and a low frequency antenna to sense wideband electromagnetic energy wherein the different frequency band antennas are closely based monopole and disk antennas. A three-dimensional probe is disclosed having three mutually orthogonal antenna pairs. Damping is provided to decouple resonance which would otherwise occur between the monopole and disk antenna. Self-checking for sensing operation of associated electronics and for providing an indication of normal and abnormal operating conditions is included.

Abstract: The invention relates to an input circuit for an electrical energy meter, which circuit has a current path and a voltage path, the current path being associated with a mutual conductance transformer. In order to compensate for the differentiating function of the transformer, but without introduicng interference signals, the current path includes an active filter connected as an integrator and provided with a coupling capacitance suitable for blocking low frequency signals.

Abstract: A meter driving device for indicating angular positions corresponding to input values. The device includes a memory for storing previously given input values, angular directions corresponding to the input values, and coefficients representative of the grades of change in angular direction depending on the change between adjacent two input values, as parameters. Based on these parameters and the frequency of input pulse signal giving the input values, the angular direction corresponding thereto is calculated. The angular direction signal receives PWM process and then supplies to a pair of crossed exciting coils via a driver. During a predetermined time period from the turning ON and OFF of the power source, the transference of the angular direction signals to the driver is shut out by logic gates, thereby inhibiting malfunctional meter indication.

Abstract: A meter driving apparatus used for automotive meters such as a tachometer and a speedometer. The frequency of a pulse signal the period of which changes in correspondence with an input is calculated by counting the reference clock signals. A current corresponding to the calculated frequency is applied to two exciting coils which are orthogonal to each other, and the indicator points at the direction at the angle determined by the torque received in accordance with the magnetic field generated. A time counter adds one to the current count value whenever a predetermined time has elapsed. Even when the input pulse signal has a low frequency and the frequency rapidly changes from a high value to a low value, a temporary output is calculated from the current count value so as to prevent the degradation of the responsiveness.

Abstract: A control arrangement including a computer-based controller and bipolar driver for bidirectional current control of air core gauge coils by pulse-width-modulation (PWM). The computer-based controller processes input information to determine the desired deflection of the pointer, and looks-up previously stored PWM duty cycle commands for energizing the gauge coils. The bipolar drivers modulate the polarity of the voltage applied to the coils in accordance with the duty cycle commands. Since the drivers are bipolar, a zero strength magnetic field vector is achieved with a duty cycle command of 50 percent. This eliminates discontinuities in the region of zero strength magnetic field vector, and avoids the requirement of generating duty cycles of 0 percent and 100 percent to achieve a full 360 degrees of pointer deflection. Potential discontinuities in the generation of the duty cycles due to input data processing requirements is eliminated by scaling the duty cycles into the range of (DELTA)% to (100-DELTA)%.

Abstract: A device for monitoring the unbalance of the electric power demanded on the conductive lines of an alternating current network of a three-phase internal installation. The device applies to all networks or three-phase installations which serve single-phase type devices in terms of variable number and power.

Abstract: An apparatus for simultaneously testing multiple integrated circuits includes a sensing circuit associated with each of the tested circuits. Each sensing circuit includes a differential amplifier with its positive input connected to the input of the test circuit, and its inversion input connected to the test circuit output. The test circuit input and positive amplifier input are biased to a selected voltage, and the voltage drop across the test circuit is provided to the amplifier inversion input. Whenever the test circuit is open, intermittently open or highly resistive, the voltage drop across the test circuit exceeds the threshold voltage of the differential amplifier, causing the amplifier to generate a high level logic output representing an open circuit condition. The outputs of the various sensing circuits together form a digital word representative of the condition of all of the test circuits.

Abstract: An instrument with cross-coil type movable magnet which performs desired indication by A-D converting in accordance with the state of an object under measurement and applying to the crossed coils the current corresponding to a digital value after A-D conversion, comprising an A-D converter to which an input signal corresponding to the state of the object under measurement is sent after overlapping with a dithering ripple, thereby enabling improvement in the resolution of pointer indication.

Abstract: A circuit arrangement for summing power outputs is disclosed. The circuit arrangement is especially useful in connection with a multi-phase electricity meter. The arrangement includes a plurality of input circuits connected in sequence, each of which has a current-to-voltage converter and a multiplier connected to the current-to-voltage converter. A voltage-to-frequency converter is connected at the output of each multiplier. Starting, at least with the second input circuit in the sequence, an adder is connected to the voltage-to-frequency converter by means of two inputs of the adder. Two other inputs of the adder are connected to two outputs of the preceding input circuit in the sequence. Illustratively, two outputs of each adder form two outputs of the corresponding input circuit. A ternary encoder followed by a ternary decoder may be located between the outputs of one input circuit and the adder of the succeeding input circuit.

Abstract: An apparatus for measuring the direction of power flow through conductors connecting a load to a source of alternating electric current, the load being capable of generating electric current, and the source of alternating electric current being capable of accepting power flow from the load. The invention comprises at least one wattmeter connected so that the sum of their outputs is proportional to the power flow through the conductors and the sign of the sum of their outputs is indicative of the direction of the power flow. A detector is provided for detecting the sign of the output of the at least one wattmeter. The detector is capable of generating an indicator signal. The indicator signal has a first value when the power flows from the source of alternating electric current into the load and the indicator signal has a second value when power flows from the load into the source of alternating electric current.

Abstract: Power measuring apparatus including a first multiplexor having its inputs responsive to the polyphase voltage and current inputs being measured. The multiplexor reads these inputs in sequence based on address signals provided by a program controlled microprocessor. The output of the multiplexor is coupled to an RMS to DC converter, the output of which is coupled to a second multiplexor. The voltage inputs are coupled to a voltage averaging device, the output thereof being coupled to additional inputs of the second multiplexor, the output of the second multiplexor being coupled to the microprocessor via an analog to digital converter. The microprocessor reads and compares the voltage output from the averaging circuit and the corresponding voltage at the output of the converter and generates a correction factor and responds thereto.

Abstract: A device for displaying forward and reflected power values simultaneously comprises a plurality of display segments which are switched on in a predetermined sequence to display the forward power and switched off in a predetermined sequence to display the reflected power.

Abstract: The present invention provides an arc discharge abnormality detecting system which in generating source plasma by the arc discharge using a plurality of filaments as the cathode in an ion source, detects an arc discharge current flowing in each of the filaments and detects the abnormality in the arc discharge when the arc discharge currents are not balanced. Further, the present invention provides an arc discharge abnormality detecting system in which said ion source is an ion source used in a neutral beam injector and a logic circuit detects the abnormality in the arc discharge when unbalance in the arc discharge currents larger than a predetermined value exists between the filaments over a predetermined period of time continuously.

Abstract: An electrical energy diversion measurement device includes a first clip-on transformer for location about the power cable at high elevation in the zone of the weather guard or at underground manhole location where power supply enters the consumer's dwelling. A second clip-on transformer is simultaneously located about a cable passing through the watt power meter housing supplying power to the consumer. A digital measurement means is responsive to the current sensed by either the current transformers or simultaneously by the transformers and digitally displays the current of each or the difference between the sensed current as a representation of current difference and energy diversion.

Abstract: A system is disclosed that includes an audio signal generator to provide a distinguishable audible output that varies in accordance with a monitored input. The audio signal generator varies a parameter of the audible output, such as frequency or amplitude, in n discrete steps corresponding to a range of variation in value of the monitored input. A plurality of different inputs may be monitored, and an audio signal generated therefrom having a plurality of different parameters, each of which corresponds to an individual one of the monitored inputs. The monitored inputs may be heart rate, systolic blood pressure, diastolic blood pressure, and body temperature. The audio signal produced may be composed of a series of recurring pulses, the parameters of which corresponding to the different monitored inputs are amplitude of each pulse, time duration of each pulse, time duration between the onset of successive pulses, and the frequency of the signal that defines each pulse.

Abstract: A signal observation system for displaying a plurality of digital signals simultaneously on a CRT screen. The signals may be displayed individually or may be logically combined and displayed as the combination dependent on selected parameters, including the logic state of each signal and the direction of the transition when the logic level changes.

Abstract: An oscillator apparatus and method for use in determining the linearity of output of a single sideband radio transmitter in which first and second oscillators are provided for generating respective audio tone signals having first and second frequencies. Each oscillator has a tone amplitude control for adjusting the amplitude of the signal produced. The signals are added, combined, and delivered to a transmitter in such a manner as to permit adjustment of oscillator and transmitter performance to a selected fraction of rated output power on each signal alone. Such adjustment makes possible a determination of linearity as described in the specification.

Abstract: An electrical signal representative of the detection of a mechanical coupling within a string of tubular goods is coupled into one input of each of a pair of parallel configured comparators. When the input signal level exceeds the value of complimentary reference levels the respective comparator generates an output signal. The composite output signal from the comparators is converted to a d.c. level which is compared to a fixed reference potential related to the duty cycle of a typical input signal. The comparator output signal is integrated and the peak value of which is stored by a peak detector. In the preferred embodiment the peak value is converted into digital form by an analog-to-digital converter.

Abstract: A remote indicator displays data contained in a transmitted signal by angular displacement of a rotor. In essence, the indicator comprises a rotatably mounted magnetic rotor, a plurality of controllable magnetic field generators disposed circumferentially around the rotor, and appropriate selection circuitry. A sector selection circuit responsive to the transmitted data selectively enables at proper polarity a plurality of generators appropriate for controlling the rotor within the sector representative of the data, and an angle selection circuit responsive to the transmitted data alternately drives selected generators by electrical pulses time modulated to drive the rotor within the sector to the angular position representative of the transmitted data. Distortions due to residual magnetism are substantially eliminated by the use of AC pulsing, and non-linear salient pole effects are eliminated through the use of look-up table techniques.

Abstract: An unbalanced current detector for a three phase electrical system of the type including a current transformer (4, 6, 8) for each phase (.phi.A, .phi.B, .phi.C) and a burden resistor (16) which receives a rectified output of the current transformer is disclosed. The harmonic content of a rectified ripple voltage developed across the burden resistor (16) is applied to a filter (20) for extracting desired frequencies and rejecting other frequencies, and the filter output is applied to a level detecting and amplifying circuit (54) the output of which is applied to an indicator (77) to indicate an unbalanced current condition.

Abstract: A monitor for measuring the field strength of RF radiation is disclosed. A set of three mutually orthogonal antennas sense the total field strength. Digital linearizing and scaling circuits provide an output equal to the sum of the square of the field components. In the preferred embodiment, the digital circuitry includes a control or zero channel which provides a zero level control signal which is processed to provide a correction signal to the analog to digital conversion circuitry to remove the effects of noise, pickup and drift on both the transmission line, which connects the antenna and the monitor, and on the analog electronic circuits of the monitor.

Abstract: A power transducer of a variety utilizing time division multiplication and configured under a principle of operation incorporating an integrator stage. Phase adjustment for the transducer is provided by a network which is coupled with the non-inverting input of the integration stage. In one embodiment, this network may be present as an R-C network.

Abstract: An operation supervisory apparatus of a canned motor comprising a first detection device for detecting mechanically abnormal operation and electrically abnormal operation of a canned motor a second detection device for detecting the rotating direction of the canned motor, a combining circuit combining an output signal from the first detection and second detection devices and taking out the greater output signal of the two, and an indicator displaying an output signal from the combining circuit. The output signal of the second detection device at the time of reverse rotation of the canned motor being set to a value greater than the output signal thereof at the time of normal rotation and than the output signal of the first detection device within the range of normal operation of the canned motor.

Abstract: A dielectric constant detector, having a sample cell and a reference cell, is provided which is useful to provide an electrical signal that is proportional to the concentration of a component being passed through the dielectric constant detector. The fluid to be analyzed together with a reference fluid is provided to the sample cell while only the reference fluid is provided to the reference cell. The difference in the capacitances of the two cells is utilized to determine the concentration of a component passing through the sample cell. The sample and reference cells are adjusted in such a manner that the capacitance of each cell is substantially equal when the same fluid is in both cells so as to substantially reduce the signal-to-noise ratios for the dielectric constant detector.

Abstract: The present invention provides for measuring and analyzing AC currents and preferably relatively large AC currents, such as those that are conventionally delivered to an electric arc furnace, as an indication of the current carrying capability or condition of one or, preferably, several cables, e.g. electric arc furnace conductors, carrying such AC currents. The invention monitors such AC currents for a period of time, stores the monitored information, and permits subsequent read-out of the stored information.

Abstract: Electronic circuitry monitors the electrical energy consumption of a system and displays the current cost of the energy usage. The projected monthly billing cost is calculated at the current rate of consumption, and an alarm signal is generated if the projected cost is higher than a budget amount. The current flow is sensed and digital pulses are fed to a microprocessor for counting and conversion to cost parameters. Clock pulses are also directed to the microprocessor for calculating the billing period and for displaying time parameters. A keyboard enables initializing and modifying the cost and time parameters in the microprocessor.

Abstract: A meter system for indicating a plurality of variables with a single meter comprises a first switch for selectively supplying one variable to the meter, a plurality of dial plates which are arranged such that one of the dial plates is selectively displayed in correspondence with the selected variable by means of a second switch arranged to be operated together with the first switch.

Abstract: A detector circuit for detecting an unwanted ground coupled to either terminal of an ungrounded d.c. power supply. The circuit uses simple and economical components including four resistors, two diodes and a single voltage comparator. The resistors provide two voltage dividers whose midpoints are at different potentials. The two midpoints are coupled by the two diodes in series with the midpoint of the diodes grounded. A voltage comparator is coupled to the voltage divider midpoints. Any unwanted ground will shift the relative polarity of the voltage divider midpoints and alter the output signal of the voltage comparator.

Abstract: An air core gage having a pair of coils in quadrature to drive a pointer has the first coil energized by a relatively constant reference current while the second coil is energized by a current which varies as a tangent function of the input quantity in order to drive the pointer through an octant of the gage. The current polarity to the second coil is reversed and the current is again varied in the same manner to vary the pointer through a second octant. Then, the reference current is applied to the second coil and the current is varied in the first coil according to the tangent function to drive the pointer through a third octant, and so on for a wide angle pointer drive. When the input quantity is a frequency, the driving circuit is conveniently a digital circuit including a ROM which stores the tangent function of the input quantity and a steering logic circuit which selectively applies the steady state and the variable signals to the gage coils to effect the appropriate pointer movement.

Abstract: A transducer monitoring system facilitating at least two measurements in locations which are difficult to access. Advantages include the capability of making the measurements in remote locations where severe environmental conditions exist. A feature of the invention is in its implementation at these remote locations without requiring additional conductors over the requirements for one-parameter measurements. An additional feature of the invention is the simplicity of the installation required at the difficult-to-access location. An additional significant advantage lies in the elimination of cross-talk, so often a serious problem in remote measurement systems. The invention presents a unique arrangement featuring a simple yet effective transducer configuration having few parts and thus high reliability.