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| Number | Title | Issue Date |
| 7366625 | Method, apparatus and computer medium for correcting transient flow errors in flowmeter proving data An apparatus for increasing the accuracy of meter factors of a flow instrument in conjunction with a prover having upstream and downstream prover detection switches and a flow computer including a computer program embodied on a computer readable medium for correctin... | 04/29/2008 |
| 7363182 | System and method for mass flow detection device calibration Systems and methods for correcting measurements of fluid flow using device-specific information to compensate for differences between individual devices of the same design. In one embodiment, a method includes providing device-specific calibration data; sensing a fl... | 04/22/2008 |
| 7249486 | Method for monitoring a sensor The present invention concerns a method of monitoring a sensor for sensing the flow speed of a medium. The invention further concerns an apparatus for carrying out that method. In order to be able to monitor the sensor, without providing redundant sensors, the flow ... | 07/31/2007 |
| 7212953 | Portable diagnostic analysis of gas meter and electronic corrector Systems and associated apparatus, methods, and computer program products, relate to a small, portable diagnostic instrument for checking the correct operation of a gas metering system that include a gas meter, an electronic corrector, and a junction there between. S... | 05/01/2007 |
| 7155956 | Medium, method and system for proving a turbine meter A novel medium, method and system for proving a turbine meter for use with natural gas. The novel test medium is a gas having the following characteristics: (a) Density>2×Density of Natural Gas; (b) Dynamic Viscosity | 01/02/2007 |
| 7127366 | Automatic thermal conductivity compensation for fluid flow sensing using chemometrics An automatically compensated fluid flow sensor uses chemometric analysis to produce a compensated fluid flow measurement. A compensation measurement having at least one additional measurement, such as a measurement of thermal conductivity, electrical conductivity, p... | 10/24/2006 |
| 7058523 | Electricity meter having gas consumption correction processing A metering arrangement includes a meter housing, a source of energy signals, a source of gas flow signals, a source of temperature signals, and a processing circuit. The meter housing is securedly supported proximal to a facility receiving utility commodities. The p... | 06/06/2006 |
| 7047802 | Pump tester An automatic pump testing device is configured with controller, a pump testing station, a supply tank and a collection tank. In accordance with one aspect of the present invention, a pump testing device is configured to test various types of hand actuated pumps. In ... | 05/23/2006 |
| 7021126 | Methods for low-cost estimation of steam turbine performance A method for determining efficiency of an installed steam turbine includes estimating, at a first plurality of times, a first mean value and a first variance of at least one performance variable of the steam turbine utilizing a set of station sensors. The method fur... | 04/04/2006 |
| 6910364 | Diagnosis method for detecting ageing symptoms in a steam turbine A diagnosis method is for detecting ageing symptoms in a steam turbine. The efficiency and the steam flow rate of an aged steam turbine is compared to the efficiency and the steam flow rate of a relatively new steam turbine. The efficiency and the steam flow rate ar... | 06/28/2005 |
| 6823275 | Fault tolerant apparatus and method for determining a revolution rate of a gear An apparatus comprises an edge detector, a memory and a pulse-input engine. The edge detector is configured to receive an input signal and a counter signal. The edge detector is further configured to send a set of time values based on the input signal and the counte... | 11/23/2004 |
| 6711513 | Fault tolerant apparatus and method for determining a revolution rate of a gear A measurement system and method for determining a revolution rate of a rotating gear is described. Such a rotating gear can be, for example, a turbine or compressor. The described measurement system and method, for example, can perform highly accurate measurements a... | 03/23/2004 |
| 6505134 | Method of calibrating a single meter blending fuel dispensing system A single meter blending fuel dispensing system utilizing a pair of proportional flow control valves each having a pressure transducer positioned aft of the valve flow control mechanism. A computer controller is used to program a desired fuel mixture by va... | 01/07/2003 |
| 6474132 | Precalibrated flow meter Precalibrated flow meters which include electronic modules that contain, in a storage memory thereof, a plurality of calibration factors that correspond to a plurality of different fluids. The calibration factors can be chosen during field operations usin... | 11/05/2002 |
| 6367306 | Compensating method and device for instrumental error in positive displacement type flowmeter An instrumental error compensating method has super precision measurement function, even in a condition having only micro temperature changes, by utilizing a computer which compensates for flow rate errors instantaneously and sends signals for indicating ... | 04/09/2002 |
| 6092410 | Meter calibration and drift compensation device The present invention relates to a system and a method for compensating for predicted meter drift is a positive displacement meter comprising a pulser connected to the meter for generating a pulse stream indicative of a current volume delivered through th... | 07/25/2000 |
| 6082169 | Method for detecting water meter malfunction, calculating the duration thereof, and device for implementing same A method for detecting water meter malfunction and calculating the duration thereof, includes measuring the average flow rate for each volume unit detected after the preceding volume unit, comparing this average flow rate with two limit flow rates which a... | 07/04/2000 |
| 6034501 | Device for driving stepper motor type measuring instrument A measure obtained by a counting circuit (2) is converted by a processing circuit (3) to an indication angle signal at a predetermined conversion cycle. A smoothing circuit (4) comprises a division circuit (11) for calculating the difference between the p... | 03/07/2000 |
| 5748504 | Calibration method for use with ultrasonic flowmeters In a fluid flow measuring apparatus, a flow of fluid is established through the apparatus at a first known flow rate. For each of two states of the apparatus, electrical drive pulses are applied to transmitting transducers. From the output signals of rece... | 05/05/1998 |
| 5455781 | Apparatus and method for determining the measurement accuracy of electronic gas meters An apparatus and method for automatically determining the measurement accuracy of an uncalibrated field fluid flow meter by comparing its fluid flow volume, measurement, Vf, to a fluid flow volume measurement, Vm, of a master meter o... | 10/03/1995 |
| 5111683 | Calibration method for a pulse response flowmeter The invention relates to a method of and apparatus for calibrating flowmeters which may be employed in a dialysis liquid circuit. The invention includes the steps of measuring during a data acquisition stage of a specified duration (Ta), each elementary p... | 05/12/1992 |
| 4953386 | Method and apparatus for proving electronic gas meters A method and apparatus for proving an electronic gas meter and the like that includes counting the number of pulses provided by an encoder associated with a bell prover to define a volume of test fluid which is supplied to the meter under test, enalbing t... | 09/04/1990 |
| 4926678 | Method and apparatus for proving electronic gas meters at low flow rates A method and apparatus for proving an electronic gas meter at low flow rates includes comparing the rate of descent of the test bell of a bell prover with the instantaneous flow rate measured by a fluid flow measuring circuit for the meter, the rate of de... | 05/22/1990 |
| 4918973 | Apparatus and method for calibrating a measuring device A calibration apparatus includes a microcomputer-based calibrator unit, functioning separately from a measuring device to be calibrated, and a coupling coil, through which calibration information generated by the calibrator unit is electromagnetically tra... | 04/24/1990 |
| 4881186 | Apparatus for measuring injection speed of die cast machines In apparatus for measuring injection speed of a die cast machine, there are provided a pulse generator responsive to a movement of an injection plunger for producing a pulse signal, a detector for detecting a width of the pulse signal to produce pulse wid... | 11/14/1989 |
| 4831866 | Automatic meter proving and calibration system An apparatus for and method of calibrating a fluid meter having an output transformable into a series of digital pulses, where each pulse represents a certain volume of liquid through the meter that changes as a result of meter wear and/or component failu... | 05/23/1989 |
| 4762012 | Universal upstream-downstream flowmeter tester A circuit simulating the electrical signal response of a flowing liquid whose velocity is to be measured by an upstream-downstream flowmeter. The circuit takes the electrical flowmeter transmit signal from an upstream-downstream flowmeter and actuates a g... | 08/09/1988 |
| 4692933 | Electro-mechanical integrator An electronic integrator for integrating a linear voltage signal utilizes a voltage-to-frequency converter for converting the voltage to input frequency. A binary counter counts pulses of the input frequency. The binary counter generates a first operating... | 09/08/1987 |
| 4509373 | Calibration circuit for ultrasonic flowmeter A calibration circuit for an ultrasonic flowmeter of the type described in U.S. Pat. No. 3,981,191 wherein a frequency counted variable delay is used to simulate flow. A stable gated oscillator is used to feed a counter whose accuracy is checked against a... | 04/09/1985 |
| 4502319 | Multi-tester for water treatment metering apparatus A testing appliance (10) is provided for a metering apparatus (1), the latter being used, in particular, for the aftertreatment of water. The testing appliance is designed in a manner such that it can be connected both to the electrical portion and to the... | 03/05/1985 |
| 4501972 | Float detection system The specification discloses a method and apparatus for detecting the position of the float in a glass tube flow meter, and determining the distance of said float from a reference line on the glass tube flow meter which is being calibrated. The blockage of... | 02/26/1985 |
| 4467657 | Device for measuring the amount of flow and/or the speed of flow of a medium A device for measuring the amount flowing through and/or the speed of flow of a medium which is pumped by means of a pump unit. The device comprises a drive motor for producing the working cycles of the pump unit and a pick-off to detect said working cycl... | 08/28/1984 |
| 4389886 | Calibrating unit A calibrating unit for calibrating infusion pumps and the like includes a drop sensor which operates to generate electrical signals in response to the passage of drops through an intravenous set. The calibrating unit operates automatically to count the nu... | 06/28/1983 |
| 4346705 | Metering apparatus having rate compensation circuit A system for infusing fluids into the human body includes a peristaltic-type metering apparatus which controls the flow of fluid through a disposable administration set at a preset rate. A compensating circuit within the metering apparatus automatically v... | 08/31/1982 |
| 4331262 | Calibratable automatic fluid dispenser A fluid dispenser pumps fluid in increments. The dispenser includes a computer which, on command, determines the volume of fluid dispensed per increment, the determined value constituting a calibration value which is stored in the memory of the computer. ... | 05/25/1982 |
| 4120032 | Methods and systems for use with pulse train circuitry Disclosed are apparatus and methods for determining the actual, standardized volume of fluid flowing in a flowline. A flow meter in the line measures volume and provides the measured value in the form of a pulse train. Compensating means change the number... | 10/10/1978 |
| 4073304 | System for calibrating a pump A system for calibrating the flow rate of a pump, and especially designed for a pump which is normally used in a system to blend highly vaporous and odorous fluids, in which the blending fluid discharged from the pump is diverted from its normal flow stre... | 02/14/1978 |
| 3940971 | System for testing flow meters Liquid is supplied to a meter test stand at a uniform pressure, and the flow through the meters on the stand automatically is directed to each of three receptacles in sequence at three different flow rates during each test cycle. Level sensors in each rec... | 03/02/1976 |
| 3937048 | Methods and apparatus for proving gas meters There is disclosed methods and apparatus for proving fluid meters, particularly gas meters of the positive displacement, diaphragm-operated type in which the number of cycles of operations of the valve mechanism of the meter is used as a factor in proving... | 02/10/1976 |
| 3933038 | Volumetric determination of contaminated liquid or gaseous media The volume of liquid or gaseous media contaminated with solids is measured discontinuously. To this end, an accurately measured volume of a pure medium is passed through a measuring device intended for measuring the volume of a contaminated medium. The nu... | 01/20/1976 |
