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7630861 |
Dedicated process diagnostic device
A field mountable dedicated process diagnostic device is used for diagnosing operation of an industrial control or monitoring system. An input is configured to receive at least one process signal...
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7628956 |
Sheath flow forming device and sample analyzer provided with same
The sheath flow forming device includes: a container for storing sample fluid and having a supply port for supplying the sample fluid; a second container for storing sheath fluid and having a...
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7607335 |
Particulate sampler system flow calibration
A particulate sampler system includes a diluted exhaust mass flow controller that receives flow from a dilution mass flow controller and a laminar flow element (LFE). The dilution mass flow...
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7552614 |
System and method for determining functionality or accuracy of a sensor
A system and method for determining functionality and accuracy of a sensor such that monitoring of a sensor is possible without the provision of redundant sensors. Briefly described, one embodiment...
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7539560 |
Control valve and positioner diagnostics
Valve positioning systems may include one or more components and a controller. Components may include one or more electric-to-pressure output converters, relays, gas supplies, and/or actuators. A...
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7516034 |
Magnetic flow transmitter having multiple flowtube data sets
A magnetic flow transmitter includes a calibration converter that performs a calibration calculation routine to produce a calibration constant that couples to a flow converter. A data set input...
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7474968 |
Critical flow based mass flow verifier
A flow verifier for verifying measurement by a fluid delivery device under test (DUT) includes a chamber configured to receive a flow of the fluid from the DUT, at least one temperature sensor to...
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7461537 |
Device and method for calibration of a mass flow sensor
A device and method for calibration of a mass flow sensor ( 14 ) employs a flow channel and a holder for the mass flow sensor in the flow channel. An adjustable throttle device is provided between...
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7424346 |
Apparatus and method for pressure fluctuation insensitive mass flow control
A mass flow controller includes a thermal mass flow sensor in combination with a pressure sensor to provide a mass flow controller that is relatively insensitive to fluctuations in input pressure....
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7343775 |
Device for continuous calibration of a gas mass flow measurement device
A gas test system ( 300 ) is disclosed comprised of a flow loop ( 302 ), a blower system ( 304 ), a temperature control system ( 306 ), a reference meter system ( 308 ), and a unit under test (UUT)...
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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...
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7152455 |
Rapid gas recovery in an incubator system
Methods and apparatus for rapid gas recovery in a controlled gas atmosphere enclosure, which are particularly suited for maintaining incubator gas concentration levels, include the formulation of...
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7108009 |
Semiconductor manufacturing apparatus enabling inspection of mass flow controller maintaining connection thereto
An opening/closing of a plurality of valves are controlled so that a plurality of gases flow into a chamber in an operation of a semiconductor manufacturing apparatus, and the opening/closing of...
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7003417 |
Multiple calibration ranges stored in a process transmitter
Process variable transmitters, and method for calibrating such device, are disclosed that support calibrating, within a single transmitter device, multiple operating ranges such that a transmitter...
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6948508 |
Apparatus and method for self-calibration of mass flow controller
A mass flow controller includes a mass flow sensor and a calibrator configured to perform a self-calibration on the mass flow controller. The calibrator generates flow measurements that are used as...
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6935156 |
Characterization of process pressure sensor
A pressure sensor of a process device, is characterized by applying a plurality of pressures to the process sensor. Outputs of the plurality of pressures are received. A compensation relationship...
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6893152 |
Method and device for evaluating a fuel gas wobbe index
A method for evaluating the Wobbe index of a fuel gas belonging to a family of gases. The method includes measuring mass flow rates the fuel gas and of a reference gas, which is not necessarily a...
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6804991 |
Method and device for detecting a leakage in a fluid system of a blood treatment apparatus
In order to detect a leakage in a fluid system of a blood treatment apparatus having an extracorporeal blood circuit, the pressure in the fluid system is measured continuously during a...
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6782333 |
Meter calibration system and apparatus
A meter calibration system and apparatus capable of calibrating meters devoid of process connections. The apparatus are a calibration system and process connection adapters, where in the system is...
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6655922 |
System and method for detecting and diagnosing pump cavitation
The present invention provides cavitation detection systems and methods employing a classifier for detecting, diagnosing and/or classifying cavitation in a pumping system. The classifier can be...
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6654697 |
Flow measurement with diagnostics
A fluid flow meter diagnosing the condition of its primary element or impulse lines connecting to a differential pressure sensor. A difference circuit coupled to the differential pressure sensor...
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6640614 |
Package burst pressure simulator
An apparatus and method for simulating a package pressure burst condition for calibrating a package pressure burst detector, where the package pressure burst detector is connected to a pressure...
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6626036 |
Clutch fill rate calibration apparatus and method
A system for calibrating the fill times of clutches using a pressure transducer service tool includes attaching the tool to an electronic controller on the vehicle and the a clutch hydraulic fluid...
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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...
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6484555 |
Method of calibrating an integrated pressure management apparatus
A method of calibrating an integrated pressure management apparatus having a chamber with an interior volume varying in response to fluid pressure in the chamber. A diaphragm partially defining the...
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6450200 |
Flow control of process gas in semiconductor manufacturing
A flow control system and method for controlling batchwise delivery of process gas for semiconductor manufacturing are disclosed, wherein the flow control system is operable in a flow mode for...
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6401525 |
Leak detection in liquid carrying conduits
A drogue capable of being inserted into a water pipe and comprising a flexible bar in which are a pressure sensor, a battery pack, an electronics assembly and a magnetometer. The bar is surrounded...
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6370936 |
Sampling apparatus for exhaust gas
A sampling apparatus for exhaust gas is capable of calibrating two flowmeters each other easily and precisely. A diluting air supply passage for diluting the sampled exhaust gas is connected to an...
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6360579 |
Flowmeter calibration system with statistical optimization technique
A flow meter calibration system uses a plurality of Coriolis effect mass flow meters formed in two arrays to calibrate a meter under test. The system adjusts flow rates to optimum levels for...
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6244310 |
Vapor recovery diagnostic testing system
A system for monitoring and testing the operation of a vapor recovery system within a fuel dispensing device. The system utilizes strategically placed sensors within the fuel dispensing device to...
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6230694 |
Calibration and testing of an automotive emission control module
An automotive emission control module has an emission control valve containing a main flow passage having a valve member that controls fluid flow through the flow passage. An internal pressure...
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6134969 |
Automatically compensatable device for measuring a pressure difference
An automatically compensatable device for measuring a pressure difference includes a housing (4) with pressure feed passages (20; 23), a sensor element (6) with electrical connections (13) which is...
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6125869 |
Self-diagnosis method for mass flow controller
Disclosed is a self-diagnosis method for a mass flow controller comprising a pressure control valve, a first shut off valve for performing opening/closing operation on an inflow side of the...
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6021660 |
Flexible fixture for locating different types of mass air flow sensor assemblies
A flexible tooling fixture that has a pallet bed lying within an x-y plane and reference elements for alignment of the bed to the manufacturing tool; and at least two sets of supports extending...
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5945591 |
Digital differential pressure gage and flow meter implementing signal difference processor
A solid state electronic digital pressure gage which is responsive to the inlet pressure (P1) and the outlet pressure (P2) of a device undergoing a flow test to measure the pressure differential...
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5894080 |
Use of a sampling apparatus for calibrating electronic mass/flow fraction meters in a pipeline
In order to eliminate heavy and expensive test separators on board offshore platforms, the invention proposes to use a sampling apparatus, which is designed, shaped and adapted to take fluid...
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5861555 |
Method and apparatus for measuring the flow differential in a dialysis machine, and method for calibrating the apparatus
Methods for measuring the flow differential through a dialysis machine are disclosed in which the dialysis machine includes a heat exchanger having a primary side and a secondary side for...
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5744695 |
Apparatus to check calibration of mass flow controllers
A calibration apparatus is applied to a gas control panel (46) that uses mass flow controllers (70,98,118) to control the flows of different gases to a processing chamber (42). The gas control...
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5710370 |
Method for calibrating a differential pressure fluid flow measuring system
In a flow measurement system comprising a primary flow sensor and a secondary electronic conversion apparatus for converting high and low fluid pressure signals from the primary flow sensor to an...
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5705734 |
Automated branch flow calibration in a HVAC distribution system
A HVAC system automates the process of calibrating the individual branch flows of the system. For each branch of the system, a damper is closed and flow values at the output of the prime mover and...
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5684245 |
Apparatus for mass flow measurement of a gas
Apparatus for and method of measuring mass flow of a gas in a gas delivery system. The apparatus is adapted to be connected to a source of a gas. The apparatus includes a fixed-volume chamber in...
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5656784 |
Fluid density variation compensation for fluid flow volume measurement
A fluid density compensator for flow volume measurements utilizes a plurality of look-up calibration tables, each for a different density gas. The measurement device provides an output signal...
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5648605 |
Flowmeter calibration method
A flowmeter calibration method includes disposing a flowmeter on a standard flowpath, disposing a flowmeter on each of a plurality of branch flowpaths in communication with the standard flowpath,...
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5504681 |
Mass air flow sensor calibration
A mass air flow sensor is calibrated by exposing it to known air flow and measuring the input and output voltage to a calibratable output stage. In the absence of air flow, the output stage is then...
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5479812 |
On-site calibration device and method for nonlinearity correction for flow sensor/transmitter
A method and apparatus for providing calibrated and linearized flow sensors for VAV systems with the sensor corrected for device/electronic/drift/and field air turbulence characteristics using...
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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, V f , to a fluid flow...
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5408420 |
Line leak test apparatus measuring rate of pressure change in a liquid storage and dispensing system
A line leak test probe for use on a liquid conduit. A pressure transducer is mounted in mechanical contact with the liquid in the conduit and a temperature transducer is mounted in thermal contact...
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5377524 |
Self-testing capacitive pressure transducer and method
A high-performance switched-capacitor circuit for electronic read-out of a pressure sensor-based ultrasensitive microflow transducer. The microflow transducer uses a differential capacitive...
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5347843 |
Differential pressure flowmeter with enhanced signal processing for respiratory flow measurement
A pressure differential flowmeter for respiratory flow measurement having enhanced signal processing. The non-linear nature of the signal generated by the differential pressure transducer is...
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5259234 |
Calibration system for air metering bellmouths
The present invention provides a system, including apparatus and method, using a National Bureau of Standards (NBS) traceable laser velocimeter for in situ calibration of a traversing static...
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