Abstract: Temperature compensation is applied to correct for temperature mismatch between a reference chamber and a disposable chamber in a pneumatic pumping system for dialysis fluid for peritoneal dialysis. The mismatch creates an error in the calculation of pumping volume of dialysate fluid. Applying a correction for the temperature mismatch helps to more precisely control the volume of dialysate that is metered to the patient. Also disclosed are ways to keep temperatures constant and to use temperature sensors to accurately measure the temperatures of the chambers. In other aspects, the temperature of the dialysate fluid itself may be measured and used to apply a correction to the volume of fluid that is pumped to the patient.

Abstract: A flow meter prover (120, 220, 320) is provided with multiple pairs of detectors to record multiple calibrated prover volumes with a single pass of the displacer 124. The prover conduit 122 may be fitted with a first pair of detectors (116, 118) for a first calibrated prover volume (V1) and a second pair of detectors (130, 132) for a second calibrated prover volume (V2). A single pass of the displacer may trip more pairs of detectors (216, 218, 230, 232, 234, 236) corresponding to more calibrated prover volumes (V3, V4, V5). A flow computer 326 may be configured to record more than two calibrated prover volumes (V6, V7, V8, V9) using only two pairs of detectors (316, 318, 330, 332) and a displacer (324).

Abstract: Methods and systems for determining an LPG fuel output characteristic of an LPG injector. The output characteristic of the LPG can be determined by calculating a total mass of LPG injected into a canister of known volume by the injector during a plurality of open/closed cycles of the injector. The pressure differential and temperature in the canister can be used in the calculation of total LPG mass along with a gas constant of the LPG and the volume of the canister. The total LPG mass can then be used to determine the mass of LPG injected by the injector during each open/closed cycle.

Abstract: A method for characterizing magnetorheological fluids using a volume flow rate measurement. The volume flow of the magnetorheological fluid through a capillary is initially measured, with a constant weight force being applied onto the magnetorheological fluid. A magnetic field is then applied to the capillary, and the volume flow of the magnetorheological fluid through the capillary is measured with the magnetic field applied, with a second constant weight force being applied onto the magnetorheological fluid. A device for carrying out the method comprises a container for storing a magnetorheological fluid, wherein the container is connected on one side to a capillary through which the magnetorheological fluid can flow, and is closed on a different side by a movable piston, which presses the magnetorheological fluid through the capillary with a constant weight force, and means for generating a magnetic field are provided in the region of the capillary.

Abstract: A technique for determining pump flow without using traditional sensors features steps and modules for creating a calibrated power curve at closed valve conditions at several speeds; calculating coefficients from a normalized power curve based on a pump's power ratio; and solving a polynomial power equation for flow at the current operating point. The calibrated power curve may be created by increasing the speed of the pump from a minimum speed to a maximum speed and operating the pump with a closed discharge valve. This data is used to correct published performance for shutoff power and best efficiency point power at rated speed in order to determine the pump's power ratio. It is also used to accurately determine closed valve power at the current operating speed. The pump's power ratio is determined by the equation: Pratio=Pshutoff @100%/PBEP—corr.

Abstract: Systems and methods of detecting occlusions and fluid-loss conditions (e.g., disconnects and/or leakages) in an infusion pump are discussed. For example, electrokinetic infusion pumps may develop an occlusion in the fluid flow path, which can disrupt control of fluid dispersed from the pump. As well, an infusion set disconnect can also result in a fluid-loss that can be disruptive. Such disruptions can be troublesome to systems that control the infusion pump, such as closed loop controllers. Accordingly, systems and methods described herein can be used to detect such occlusions and fluid-loss conditions during infusion pump operation. For example, a position sensor can be used to monitor fluid flow from the infusion pump, with the measurement being compared with an expected value to detect an occlusion or fluid-loss condition. Other algorithms for utilizing the position sensor are also described.

Abstract: A stocker 1 includes a storage FOUP 20, plural purge units 50, a measurement FOUP 30 and a stacker crane 60. The storage FOUP 20 stores a semiconductor wafer inside. The measurement FOUP 30 includes a flow meter inside. The purge unit 50 includes a purge shelf 51 having plural purge tables 54 for placing the storage FOUP 20, and a nitrogen gas is supplied into the storage FOUP 20 placed on the purge table 54. The stacker crane 60 transports the storage container 20 onto the purge table 54, and the measurement FOUP 30 is transported between the plural purge tables 54.

Abstract: Improved methods and systems for estimating material weight, mass and volume in real-time are disclosed. The amount of material in the container is measured. An estimate of the amount of material in the container is then obtained using the measured amount of material in the container, a desired rate of change of material, and a container system model. The estimate of the amount of material in the container is then adjusted based on the difference between the estimated and measured amount of material in the container.

Abstract: The disclosure relates to a system and method for identifying whether a difference between measured lambda and computed lambda, based on mass air flow and mass fuel flow, is due to a drift in fuel metering or a drift in air metering. The determination is based on also measuring exhaust gas NOx using a NOx sensor. By comparing the measured NOx to modeled NOx, drift can be attributed appropriately to the air flow measurement and/or the fuel flow measurement. Appropriate correction in the calibration can be undertaken to overcome sensor drift and/or drift in the fuel injector/fuel system flow characteristics.

Abstract: Embodiments disclosed herein provide restrictive-flow flow measurement devices, valve improvements and signal control devices and processes that control the flow of liquids, including control processes for single-liquid calibration. In some embodiments, a fluid flow device can be calibrated using a single standard calibration fluid. The fluid flow of a first fluid through a flow meter is measured by calculating a first pressure difference between pressures sensed by two pressure sensors of the flow meter. The fluid flow of a second fluid through the flow meter is measured by calculating a second pressure difference between pressures sensed by the same two pressure sensors. A calibration coefficient is determined based upon the relationship between the flow rate, the fluid density and the calculated pressure difference for the first and second fluids. A relationship between the calibration coefficient and the kinematic viscosity of each fluid is then determined and stored.

Abstract: Two vertically offset thermistors for sensing a fluid such as oil and refrigerant in a compressor shell are monitored by a method that takes into account rapidly changing conditions within the shell. The system can determine the fluid's sump temperature, high/low liquid levels, and can determine whether the thermistors are sensing the fluid as a liquid, gas, or a mixture of the two, such as a foam or mist of liquid and gas. For greater accuracy, thermistor readings can be dithered and filtered to provide temperature or voltage values having more significant digits than the readings originally processed through a limited-bit A/D converter. For faster response, limited microprocessor time is conserved by sampling thermistor readings at strategic periods that enable the microprocessor to identify certain conditions and temperatures via simple delta-temperature ratios and undemanding equations rather than resorting to exponential functions or lookup tables to determine time constants.

Abstract: The present invention aims to provide an air-micrometer calibration device capable of securely causing an axis of a measuring-head tip portion and an axis of a master hole to coincide with each other.

Abstract: 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. Some embodiments may use calibrated sensors to check the operation of a rotary or other positive displacement type gas meter or turbine meter. For example, reference sensors may be temporarily applied to monitor gas temperature and pressure, as well as the motion of a flow-responsive element (e.g., impellers, turbine, or diaphragm) in the gas meter. Measured volume signals from the gas meter system may be compared to reference volume signals determined from the reference sensors to check operation of the junction, and/or the electronic corrector. Some embodiments may detect other failure mechanisms, such as bearing-related problems in the gas meter, for example.

Abstract: A simplified method for calibrating a variable-displacement hydraulic PTO system on an agricultural windrower when powering a header wherein the variable-displacement pump is operated at maximum flow capacity while the engine is operated at a pre-determined speed and a flow balance valve is adjusted to achieved a pre-determined cutterbar speed. Operation of the cutterbar at the pre-determined speed allows sufficient hydraulic fluid flow through the remaining parallel fluid circuit to power the remaining equipment, typically a reel, on the header. Controls for managing pump displacement and engine speed as well as indication of cutterbar speed are typically available on the windrower tractor thereby eliminating the need for additional diagnostic equipment and making the method suitable for use in the field.

Abstract: A fluid flow control system using flow rates to extract additional information from an in-line flow sensor. The system provides the ability to determine a position of a movable flow sensor element of a flow sensor by illuminating a photosensitive pixel array with a light source to create a first set of pixel intensity values introducing an abrupt change to the fluid driving pressure, illuminating the photosensitive pixel array with a light source to create a second set of pixel intensity values, and calculating the difference between the first and second sets of pixel intensity values as a function of pixel position.

Abstract: A system and method for operating a mass flow controller is described. One embodiment validates the operation of a mass flow controller thermal sensor, including detecting zero drift and span drift in the sensor by comparing the thermal sensor output to a pressure sensor output. In one embodiment, each sensor provides a signal to a digital controller or other processing unit and the controller calculates the mass flow rates of a gas flowing through the unit as measured by the sensors. The mass flow rates may then be compared to determine if one of the thermal sensor is operating properly.

Abstract: A penetration and removal efficiency calibration unit for a volatile particle remover in a solid particle counting system provides an accurate and efficient approach to calibration. The calibration unit includes an aerosol inlet, a flow meter downstream of the aerosol inlet, and a mixer. The flow meter receives the aerosol flow from the aerosol inlet and provides an output flow to the mixer. The mixer receives the output flow from the flow meter and also has a dilution gas inlet. The mixer provides a mixer output flow for reception by the volatile particle remover or particle counter. A first flow controller controls flow into the dilution gas inlet. The calibration unit also includes a bypass inlet. A second flow controller controls flow into the bypass inlet, and a control loop controls the bypass flow such that the aerosol flow tracks a reference value.

Abstract: A gas flow stand (200) is provided according to an embodiment of the invention. The gas flow stand (200) includes a weighing device (210) and a meter under test (203) positioned on the weighing device (210). The gas flow stand (200) further includes a gas source (201) positioned on the weighing device (210) and conduit (205) connecting the gas source (201) and the meter under test (203). The weighing device (210) generates a weight measurement for the meter under test (203), the gas source (201), and the conduit (205).

Abstract: A body section having a main channel through which a fluid to be measured flows and sections for shunting the fluid to be measured from the main channel, and a fluid measuring section provided removably from the body section and measuring the flow rate of the fluid to be measured flowing through the main channel based on the detection results of the fluid to be measured introduced from the shunting section. The fluid measuring section is fixed to the body section and shunt ratio data, i.e. the adjustment data about measurement processing inherent to the constitution of the body section, is registered in the fluid measuring section before adjusting measurement processing.

Abstract: A method includes introducing a tag into a fluid stream, the tag being suspended in the fluid stream. The tag is detected at a first end of a calibrated volume and a first detection signal is generated responsive thereto. The tag is detected at a second end of the calibrated volume and a second detection signal is generated responsive thereto. A flow parameter for the fluid stream is determined based the first and second detection signals and the calibrated volume.

Abstract: A transmitter for a magnetic flowmeter comprises a current source, memory and a signal processor. The current source energizes the flowmeter, such that the flowmeter generates an induced electromotive force in response to a process flow. The memory stores a flow configuration that describes a flow pipe disturbance in the process flow. The signal processor determines the flow rate as a function of the induced electromagnetic force, and as a further function of the flow configuration.

Abstract: An ultrasonic transducer apparatus and process for determining the optimal transducer position for flow measurement along a conduit outer surface. The apparatus includes a transmitting transducer for transmitting an ultrasonic signal, said transducer affixed to a conduit outer surface; a guide rail attached to a receiving transducer for guiding movement of a receiving transducer along the conduit outer surface, wherein the receiving transducer receives an ultrasonic signal from the transmitting transducer and sends a signal to a data acquisition system; and a motor for moving the receiving transducer along the guide rail, wherein the motor is controlled by a controller.

Abstract: A multiple flow conduit flow meter (200) is provided according to an embodiment of the invention. The multiple flow conduit flow meter (200) includes a first flow conduit (201) conducting a first flow stream and a pair of first pickoff sensors (215, 215) affixed to the first flow conduit (201). The multiple flow conduit flow meter (200) further includes at least one additional flow conduit (202) conducting at least one additional flow stream and at least one pair of additional pickoff sensors (216, 216?) affixed to the at least one additional flow conduit (202). The at least one additional flow stream is independent of the first flow stream. The multiple flow conduit flow meter (200) further includes a common driver (220) configured to vibrate both the first flow conduit (201) and the at least one additional flow conduit (202) in order to generate a first vibrational response and at least one additional vibrational response.

Abstract: A vibratory flow meter (100) for correcting for an entrained phase in a two-phase flow of a flow material is provided. The vibratory flow meter (100) includes a flow meter assembly (10) including a driver (104) and with the vibratory flow meter (100) being configured to generate a vibrational response for the flow material. The vibratory flow meter (100) further includes and meter electronics (20) coupled to the flow meter assembly (10) and receiving the vibrational response. The meter electronics (20) is configured to generate a measured two-phase density of the two-phase flow using the vibrational response, determine the computed drive power needed by a driver (104) of the flow meter assembly (10), and calculate a density compensation factor using a liquid density of a liquid component of the two-phase flow, an entrained phase density of an entrained phase component, the measured two-phase density, and the computed drive power.

Abstract: An orifice test calibration device tests the functionality of protective mask testers. The orifice test calibration device has a semi-rigid tubular channel with one end for sealing the flow outlet port of the protective mask tester and a second end for sealing the vacuum inlet port of the protective mask tester. The device also includes a sealable opening within the tubular channel and an insertable orifice plug having a set diameter for insertion into the sealable opening in order to calibrate the protective mask tester.

Abstract: A method for mounting a prover and its attached motive means either horizontally or vertically as a function of the footprint available on the surface on which the prover is to be mounted. The method includes attaching the prover and its motive means to a lower framework. Attaching a plurality of stanchions to the lower framework. Mounting an upper framework on the stanchions. Adding a plurality of I-beams to the upper framework and to the stanchions to render the mounting for the prover rigid, whether the prover is mounted horizontally or vertically.

Abstract: A testing method for testing a flow controller with high accuracy by shortening as much as possible the time required for the test including the wait time. A testing-subject flow controller and a testing-standard flow controller are arranged in that order in series from the upstream side in a flow channel through which a fluid whose flow is to be controlled flows. In a flow-uncontrolled state in which the valve of the testing-subject flow controller is practically in the full-open state, and with the fluid flow controlled to a predetermined flow rate by the testing-standard flow controller, whether the actual flow-rate measurement according to the testing-subject flow controller falls within a predetermined range of actual flow-rate measurements according to the testing-standard flow controller is determined.

Abstract: Some embodiments of the present invention provide a system that determines a flow rate of air along an airflow path in a computer system. During operation the system monitors a first temperature profile from a first temperature sensor located in a first position in the airflow path, and monitors a second temperature profile from a second temperature sensor located in a second position in the airflow path, wherein the first position is upstream in the airflow path from the second position, and wherein the first position and the second position are separated by a predetermined distance along the airflow path. Next, the system computes a cross-power spectral density based on the first temperature profile and the second temperature profile. Then, the system determines a flow rate of air in the computer system based on the cross-power spectral density.

Abstract: A vibratory flow meter (100) for correcting for entrained gas in a flow material is provided. The vibratory flow meter (100) comprises a flow meter assembly (10) configured to generate a vibrational response for the flow material, a bubble size sensor (50) configured to generate a bubble measurement signal for the flow material, and meter electronics (20) coupled to the flow meter assembly (10) and to the bubble size sensor (50). The meter electronics (20) is configured to receive the vibrational response and the bubble measurement signal, determine a bubble size of bubbles in the flow material using at least the bubble measurement signal, determine one or more flow characteristics of the flow material using at least the vibrational response and the bubble size.

Abstract: The invention relates to a method for operating a measuring device, especially a flowmeter. The aim of the invention is to simplify inspection if the sensors have been correctly installed. For this purpose, the installation state is detected by the sensors themselves, i.e. by sensing a corresponding sensor value and comparing it with characteristic data. The result of comparison is electronically evaluated and automatically estimated whether the characteristic data obtained match the comparative data within at least a defined tolerance.

Abstract: The flow of a fluid of unknown composition is measured by leading the fluid over a first temperature sensor, a heater and a second temperature sensor. The temperature difference DTP between the temperature sensors is measured, as well as the temperature T of at least one of them. In addition, calibration data is used to store the temperature Tref of a known reference fluid. The offset T?Tref at a given temperature difference DTP is a direct measure of the composition of the fluid and allows to retrieve any parameter depending on the same.

Abstract: A method for determining the flow rate of a gas includes measuring a first concentration of a calibration gas provided to the process chamber at a first pressure and temperature by directing infrared radiation into the process chamber and monitoring a first amount of infrared radiation absorbed by the calibration gas. A mixture of a second gas and the calibration gas is provided to the process chamber while maintaining the first pressure and temperature. A second concentration of the calibration gas in the mixture is measured by directing infrared radiation into the process chamber and monitoring a second amount of infrared radiation absorbed by the calibration gas. A flow rate of the second gas is calculated by comparing the first and second concentrations of the calibration gas. In one embodiment, the calibration gas and the second gas may not absorb the infrared radiation at the same wavelength.

Abstract: A calibration tool for an air data sensor of a vehicle comprises a target surface which is disposable on the vehicle. The calibration tool may further comprise a light pointer which is mountable on the air data sensor and which is operative to project a beam of light toward the target surface. The air data sensor may be configured as a flow direction sensor which may include at least one of an alpha vane for measuring angle of attack or a beta vane for measuring sideslip. The flow direction sensor may be mountable in spaced relation to the vehicle via a standoff. The flow direction sensor may include a hollow pivot arm having a laser pointer mounted therewithin for projecting a beam of laser light onto the target surface.

Abstract: An infusion pump and method are provided which combine flow rate measurements calibrated by accurate volume measurements over time.

Abstract: A method for ascertaining volume- or mass-flow of a magnetically conductive medium flowing through a magneto-inductive, flow-measuring device having a predetermined nominal-diameter, wherein a periodically alternating, magnetic field is caused to pass through the flow-measuring device, the actual rise time, until a constant magnitude of the magnetic field is reached, is ascertained, the actual rise time is compared with a desired rise time ascertained in the case of flow of a reference medium through the flow-measuring device, and, on the basis of a difference between actual rise time and desired rise time, a measurement error is ascertained and the actually measured volume- or mass-flow of the magnetically conductive medium is so corrected, that the measurement error is canceled.

Abstract: The present application is directed to systems and methods associated with infusion pumps, which can optionally utilize an electrokinetic driving mechanism. Infusion pumps, including electrokinetically-driven pumps, are discussed, along with schemes for controlling their operation. As well, systems and methods of detecting malfunctions in infusion pumps are discussed. Any number of malfunctions can be detected including the presence of occlusions and/or leaks. In some instances, a measurement associated with some aspect of electrokinetic phenomena (e.g., an electrode measurement such as voltage or current) is compared with one or more sample values, the comparison allowing an indication of pump malfunction to be determined. A variety of such measurements and comparison techniques are discussed in the present disclosure.

Abstract: A communication system is provided that includes a controller system (1), a master control (2) and at least one slave control (3). The controller system and the master control (2) are connected via a multipole connection (4). The master control (2) is adapted to receive a multipole signal via the multipole connection (4) and output an addressed signal to at least one slave control (3) via an addressable connection (7, 17). This application also discloses a method of controlling a plurality of fluid flow controls using an output (40) comprising an actuation signal arrangement (41, 41?) and an actuator (42, 42?) associated with each fluid flow control.

Abstract: A blade for a marine propeller includes an adjustment strip located in a channel near the trailing edge of a high pressure face of the blade. The adjustment strip protrudes from the blade face, altering the hydrodynamic properties of the blade. Strips can be replaced with other strips of different heights in order to suit particular requirements for hydrodynamic properties.

Abstract: A processing system is disclosed for conducting various processes on substrates, such as semiconductor wafers by varying the exposure to a chemical ambient. The processing system includes a processing region having an inlet and an outlet for flowing fluids through the chamber. The outlet is in communication with a conductance valve that is positioned in between the processing region outlet and a vacuum exhaust channel. The conductance valve rapidly oscillates or rotates between open and closed positions for controlling conductance through the processing region. This feature is coupled with the ability to rapidly pulse chemical species through the processing region while simultaneously controlling the pressure in the processing region. Of particular advantage, the conductance valve is capable of transitioning the processing region through pressure transitions of as great as 100:1 while chemical species are flowed through the processing region using equally fast control valves in a synchronous pulsed fashion.

Abstract: The present invention relates to methods and apparatuses for measuring flow rate in pipes. The standard method of installing flow meters inside pipes to measure flow rates are costly and result in loss of energy and reduction of flow. The present invention solves the problems of standard flow measuring method. The present invention uses an apparatuses comprising of a first pipe and a by-pass second pipe. The flow is partitioned between the first pipe and the by-pass second pipe. A flow meter is installed in the by-pass second pipe. The flow rate is measured through the by-pass second pipe, and using the by-pass second pipe flow rate, the combined flow rate through the first pipe and the by-pass second pipe is calculated. The invention describes two methods to calibrate the apparatuses and relate the flow rate in the by-pass second pipe to total combined flow rate.

Abstract: Analyzing the pressure profile generated during a limited period of time immediately prior to the end of a liquid aspiration process and comparing the standard deviation of the residuals to a critical value to determine if the liquid was of a desired sufficient volume.

Abstract: A system and method for controlling operation of an ultraviolet air treatment device including an ultraviolet lamp positioned to treat air within an air handling system that operates in either an on state or an off state. The method includes activating the ultraviolet lamp, and determining the operational state of the air handling system. The ultraviolet lamp is deactivated upon expiration of a predetermined time period during which the air handling system remains in the off state. The predetermined time period is preferably 30-60 minutes, preferably 40 minutes for residential applications.

Abstract: An apparatus for indicating a volume of liquid flow, comprising a liquid sensor for sensing the presence of a liquid, a timer activated when the liquid sensor indicates the presence of a liquid, a calculator to calculate the volume of liquid flow dependent upon the time for which the timer is activated, and an indicator to provide an indication of the volume of fluid calculated by the calculation means

Abstract: A routing system for shared conduits used in industrial applications is sensitive to material types and material flow histories to allow compatible materials to flow through shared conduits without cleaning while preventing contamination of materials in those shared conduits.

Abstract: A method of calibrating an electrically controlled hydraulic valve having a known relationship between flow rate through the valve and displacement of a valve element is disclosed. The method includes ascertaining a first current level for actuating the electrically controlled hydraulic valve to move the valve element to a position adjacent an inlet port, and a first displacement of the valve element responsive to the first current level. The method also includes ascertaining a second current level for actuating the electrically controlled hydraulic valve to move the valve element from the position adjacent the inlet port to a position permitting flow through the inlet port, and ascertaining a second displacement of the valve element responsive to the second current level. The method further includes establishing a relationship between current and displacement associated with the electrically controlled hydraulic valve.

Abstract: A method and apparatus for validating the flow calibration factor of a Coriolis flowmeter. In accordance with a first embodiment, an improved material density is obtained by measuring material density when the temperature of the material is equal to a predetermined reference temperature. In accordance with a second embodiment, a preprogrammed data base stores density/temperature relationships. Improved density information is obtained by measuring the density and temperature of the material, applying the measured density/temperature information from the data base, and obtaining density information compensated for a predetermined reference temperature. The improved density information obtained for both embodiments is unaffected by temperature changes and is used to validate the flow calibration factor. The flow calibration factor compensation for pressure changes and changes in material composition is obtained in a similar manner.

Abstract: A three pickoff sensor flow meter (200) is provided according to the invention. The three pickoff sensor flow meter (200) includes a first flow conduit (210a) conducting a first flow stream, a second flow conduit (210b) that is independent of the first flow stream, and a common driver (216) configured to vibrate the first flow conduit (210a) and the second flow conduit (210b). The three pickoff sensor flow meter (200) further includes three pickoff sensors (218, 219a, 219b) configured to provide first and second time delay values (?t1) and (?t2) for the first flow conduit (210a) and the second flow conduit (210b).

Abstract: A method and apparatus that solve the problem of accurate measurement of gas flow so that the delivery of gases in semiconductor processing may be performed with greater confidence and accuracy by performing real-time characterization of a lead-line for mass flow controller (MFC) flow verification are provided. In one embodiment a mass flow verifier (MFV) provides rate of rise information to a controller via a digital interface without correcting for lead-line influences. After receiving the rate of rise data from the tool host computer computes a gas mass correction factor in real-time based on at least one of the following: MFC temperature sensor data, lead-line temperature sensor data, lead-line pressure transducer data, and lead-line volume. The rate of rise data and gas mass correction factor are used to compute accurate mass flow. The accurate mass flow information may be used to calibrate the MFC.

Abstract: A method of testing a mass flow rate meter functioning on the Coriolis principle, in which an apparatus of the mass flow rate meter is subjected to a predetermined oscillation excitation and the associated oscillation response is recorded. Then the recorded oscillation response is compared with a previously recorded oscillation response. Testing of the Coriolis mass flow rate meter with regard, for example, to error tolerances in the manufacturing or with regard to a calibration condition is thereby enabled.

Abstract: System and method for determining total mill flow (TMF) in a biofuel production process. Measured slurry flow and density values from a process fed by mill(s), backset, and at least one water source, are received. The slurry includes biomass solids and water. Measured backset flow and density values, and a backset composition value are received, as well as a slurry composition value indicating % biomass solids of the slurry is received. A quantity of biomass solids and/or water of the slurry determined based on the slurry flow, density, and composition, and a quantity of the biomass solids and/or water of the backset determined based on the backset flow and density, backset composition, and a system filter characterizing time delays and lags between measurements of the backset flow and biomass slurry flow. Total mill flow is determined based on the quantities of biomass solids and/or water of the slurry and backset.