Abstract: A static gas flowmeter for sensing a flow of gas includes an outer housing, a flow tube coupled to an outlet or an inlet, ?1 sensor positioned for sensing gas flowing through the flow tube, and a controller including a memory including a flow calibration and flow measurement algorithm coupled to a sensor receiving a sensing signal. An integrated gas valve is connected to the inlet or outlet and/or there is an additional external valve positioned outside the housing coupled to the inlet to provide the gas flowmeter at least two state operation. Using the valve(s), the flow calibration algorithm triggers a zero-flow condition, then obtains a measured gas flow, and from the measured gas flow a flow offset is determined. If the flow offset is outside a predetermined limit, in-line calibrating is performed by adding the flow offset reflected as a correction factor to the flow measurement algorithm.

Abstract: A radiometric measuring device for determining a mass flow of a bulk material on a conveyor belt including, at least one detector which is configured to detect at least part of radiation of at least one radiation source the emits the radiation in a direction of the bulk material on the conveyor belt, the radiation having at least partially passed through the bulk material and the conveyor belt, at least one evaluation circuit which is configured to determine the mass flow of the bulk material based on the detected radiation; at least one storage means which is set up to store at least one measured value equation, the measured value equation mapping a relationship between the detected radiation and the mass flow, at least one electronic calculation means which is set up to determine, based on at least one calibration measurement without bulk material on the conveyor belt, a correction equation with which the measured value equation is corrected.

Abstract: In one aspect, data characterizing a fuel storage facility can be received from a sensor in operable communication with the fuel storage facility. An estimate of meter drift of a flow meter of a fuel dispenser in fluid communication with the fuel storage facility can be determined based on the received data. The estimate of meter drift can be determined based on at least one predictive model that predicts whether a calibration parameter characterizing a calibration of the flow meter has deviated from a predetermined flow meter calibration parameter. The estimate of meter drift can be provided.

Abstract: An example method for determining fluid flow in an open channel fluid conduit may include coupling a sensor assembly to an exterior surface of the open channel fluid conduit. Measurements may be received from the sensor assembly. The method may further include calculating a flow rate of a fluid within the open channel fluid conduit based, at least in part, on the received measurement.

Abstract: In order to provide a flow rate control apparatus capable of reducing noise while reducing delay, the flow rate control apparatus includes: a fluid resistor provided in a flow path; a downstream valve provided downstream of the fluid resistor; and a downstream pressure sensor provided between the fluid resistor and the downstream valve. The apparatus calculates a resistor flow rate through the fluid resistor; the time change amount of the downstream pressure; on the basis of the resistor flow rate, the difference between the resistor flow rate and the time change amount of the downstream side pressure, and a weighting factor, calculates a weighted average to estimate a valve flow rate through the downstream valve; and, on the basis of the deviation between a set flow rate and the valve flow rate, controls the downstream side valve, in which the weighting factor is configured to be changeable.

Abstract: Methods, systems, and techniques for detecting at least one of an influx event and a loss event during well drilling involve using one or both of errors between 1) estimated and measured pit volume, and 2) estimated and measured flow out, to identify or determine whether the influx or loss event is occurring, or to sound some other type of related alert. These determinations may be performed in a computationally efficient manner, such as by using one or both of a time and depth sensitive regression.

Abstract: A method for determining a flow distribution in a formation having a wellbore formed therein comprises the steps of positioning a bottomhole assembly in a wellbore, the assembly including an injection port for dispensing a fluid, a first sensor disposed upwell from the injection port, and a second sensor disposed downwell from the injection port, wherein each of the sensors generates a feedback signal representing a flow rate of the fluid in a portion of the wellbore, determining an approximate depth of a portion of the bottomhole assembly in the wellbore, generating a data model based upon an instruction set, the data model representing flow characteristics of the fluid in the wellbore, wherein the data model is derived from the feedback signal and the approximate depth of the injection port, and analyzing the data model based upon an instruction set to extrapolate a characteristic of the formation.

Abstract: A golf club head comprises a sole, a recessed sole port in the sole; and a rotatably adjustable sole piece adapted to be at least partially received within the sole port and comprising a central body having a plurality of contact surfaces adapted to contact the sole port and being offset from each other along a central axis extending through the central body of the sole piece. The sole piece can be positioned at least partially within the sole port at five or more rotational and axial positions with respect to the central axis, wherein at each rotational position, at least one of said contact surfaces of the central body contacts the sole port to set the axial position of the sole piece. The sole port and/or the sole piece can be generally pentagonal in shape.

Abstract: An apparatus, method and system providing for calibration and/or control of a liquid dispensing system is disclosed. The hand-held calibration auditing tool includes a flow meter (36-37) with inlets adapted for quick connection to one or more liquid inputs to a liquid dispensing system (10). A sensor (94-95) having a data output of liquid flow information for a liquid input to the dispensing system (10) is operably connected to a controller (12) to receive the liquid flow information for the liquid input. The controller (12) provides a dilution rate and other liquid flow information for a liquid product input to a dispenser.

Abstract: A thermal flow meter is provided that can accurately correct zero point and span errors, which change depending on an ambient temperature, independently of a fluid type. The thermal flow meter includes: a flow path through which measuring target fluid flows; an upstream side electrical resistive element provided on the upstream side of the flow path; a downstream side electrical resistive element provided on the downstream side of the flow path; and a flow rate calculation part that calculates a flow rate of the measuring target fluid on the basis of an upstream side voltage that is a voltage applied to the upstream side electrical resistive element, a downstream side voltage that is a voltage applied to the downstream side electrical resistive element, and the thermal conductivity of the measuring target fluid.

Abstract: Apparatus for providing a mass flow measurement in respect of a fluid flowing in a conduit (11, 30), the apparatus comprising at least one non-intrusive device configured to obtain, in use, data representative of the total volumetric flow of said flowing fluid 32a,b, 20a,b), at least one device (16, 42) configured to obtain, in use, data representative of density of said flowing fluid, at least one device (38, 42, 44, 46, 43) configured to obtain, in use, data representative of the level of said fluid in said conduit, and a device (22, 40) configured to calculate, in use, a corrected mass flow of said flowing fluid using said total volumetric flow, corrected using said fluid level data, and said density data.

Abstract: Methods and apparatus for in-situ calibration of a flow controller are provided herein. In some embodiments, a method of flowing a gas includes providing a flow controller configured to provide a first gas at a first value of a flow rate based on a calculated first relationship determined by using a standard gas; determining an actual first relationship between the flow rate and the setpoint for the first gas from a plurality of values of the flow rate of the first gas determined at a corresponding plurality of values of the setpoint of the flow controller, wherein each of the plurality of values of the flow rate is determined from flowing the first gas through the flow controller at corresponding ones of the plurality of values for the setpoint; and flowing the first gas at the first value of the flow rate based on the actual first relationship.

Abstract: In a gas flow monitoring method using a MFC (a flow control device) for controlling a flow rate of process gas from a process gas supply source and supply the process gas to a predetermined process chamber, a start shut-off valve placed upstream of the MFC, and a pressure gauge placed between the start shut-off valve and the MFC, the start shut-off valve is closed and a drop of pressure on an upstream side of the MFC is measured by the pressure gauge to measure a flow rate of the MFC, thereafter, the start shut-off valve is opened to monitor the flow rate of the MFC. The MFC is switched from an ON state to an OFF state before the start shut-off valve is opened. The method enables in-line monitoring a low rate of process gas without affecting a semiconductor manufacturing process.

Abstract: A system for determining a volume of loose material within a container comprises a support arm mountable above the container, an array of one or more sensors mounted to the support arm, wherein each of the one or more sensors is configured to determine a discrete distance measurement between the array and a surface of the loose material or a surface of the container, and at least one processor in communication with the array of one or more sensors, the processor configured to estimate a volume of the loose material in the container from discrete distance measurements determined by the one or more sensors of the array.

Abstract: A golf club head comprises a sole, a recessed sole port in the sole; and a rotatably adjustable sole piece adapted to be at least partially received within the sole port and comprising a central body having a plurality of contact surfaces adapted to contact the sole port and being offset from each other along a central axis extending through the central body of the sole piece. The sole piece can be positioned at least partially within the sole port at five or more rotational and axial positions with respect to the central axis, wherein at each rotational position, at least one of said contact surfaces of the central body contacts the sole port to set the axial position of the sole piece. The sole port and/or the sole piece can be generally pentagonal in shape.

Abstract: One embodiment of the present invention sets forth a technique for transmitting a digital content stream through a network between at least one content server and a content player. The method includes communicating with the at least one content server to set up a plurality of parallel network connections on the network to transmit the digital content stream. The method further includes sending a first data request and a second data request within a first time limit via at least one tested network connection in the plurality of parallel network connections to evaluate whether pipelining of the digital content stream is possible for the at least one tested network connection. The method also includes utilizing pipelining to transmit the digital content stream over the at least one tested network connection based on a first response to the first data request and a second response to the second data request.

Abstract: Mass flow controllers with on-tool diagnostic capabilities and methods for on-tool diagnosis of mass flow controllers are disclosed herein. One disclosed method includes effectuating a particular modification to the heating of the one or more heating-sensing elements, and monitoring one or more outputs of the mass flow sensor to obtain present data that characterizes a present operation of the mass flow sensor in response to the particular modification to the heating. Reference data is obtained that characterizes prior operation of the mass flow sensor, and the present operation of the mass flow sensor is compared to the prior operation of the mass flow sensor to assess whether the operation of the mass flow sensor changed over time.

Abstract: Mass flow controllers with on-tool diagnostic capabilities and methods for on-tool diagnosis of mass flow controllers are disclosed herein. One disclosed method includes providing current to two heating-sensing elements of a mass flow sensor and modifying current through at least one of the heating-sensing elements. Reference data is obtained that characterizes proper operation of the mass flow sensor, and one or more flow sensor signals from the mass flow sensor are analyzed in connection with the reference data to assess whether the mass flow sensor is operating properly.

Abstract: An automated calibration device that comprises a tube for trapping a multiphase sample between three ultrasound (US) transducer pairs wherein each of the three transducer pairs is positioned to measure a different fraction of the multiphase sample.

Abstract: An online method for reconfiguring pressure and position sensors in a hydraulic system is disclosed. In one step, a sensor drift condition, a recalibration request, or an unisolated fault condition is detected. In another step, a system pressure sensor or another sensor, such as a load-sense pressure sensor, is verified as a trusted master reference sensor. Another step includes measuring and recording a first pressure reading at the master reference sensor and first voltage readings associated with first, second, third, and fourth pressure slave sensors at a first pump pressure set point. Another step includes, repeating the previous step at a second pump pressure set point. A new gain and offset for each of the first, second, third, and fourth pressure sensors can be calculated based on a comparison of the recoded first and second pressure readings and the recorded first and second voltage readings.

Abstract: Apparatus and methods for verifying temperature measurements in an ultrasonic flow meter. An ultrasonic flow metering system includes a passage for fluid flow, a temperature sensor, an ultrasonic flow meter, and a flow processor. The temperature sensor is disposed to provide measured temperature of fluid flowing in the passage. The ultrasonic flow meter is configured to measure transit time of an ultrasonic signal through the fluid. The flow processor is configured to 1) compute speed of sound through the fluid based on the transit time; 2) calculate a computed temperature of the fluid based on the speed of sound; 3) apply compensation, based on a historical difference between the computed temperature and the measured temperature, to a temperature verification parameter; and 4) determine, based on the temperature verification parameter, whether a current difference between the measured temperature and the computed temperature is within a predetermined range.

Abstract: An imaging section images a subject to generate an image. A display displays an image. A measuring section measures the size of the subject on the basis of the image. A recording section associates calibration data of a measuring endoscope apparatus including a value obtained when the measuring section measures the size of the calibrator on the basis of an image obtained when the imaging section has imaged the calibrator, and calibration data of the calibrator including a value obtained when the calibrator is measured by a higher-rank measuring instrument of a traceability system, and a value obtained when the measuring section measures the size of a measurement object different from the calibrator on the basis of an image of the measurement object, with the image of the measurement object image and records the associated data on a recording medium.

Abstract: An electromagnetic flowmeter with variable-frequency conductivity-sensing function for a liquid in a tube includes a first microprocessor, a transducer, flow-sensing device, an exciting-current generating device, a variable-frequency conductivity measuring device, and a switch. The transducer includes coils and sensing electrodes. The switch is electrically connected to the first microprocessor and the sensing electrodes. The switch is selectively connected to the flow-sensing device or the variable-frequency conductivity measuring device according to the signals sent from the first microprocessor. The microprocessor makes the exciting-current generating device to generate an exciting current when the switch is connected to the flow-sensing device. The first microprocessor makes the exciting-current generating device stop to generate exciting current and computes conductivity of liquid when the switch is electrically connected to the variable-frequency conductivity-sensing device.

Abstract: A method of monitoring a Mass Flow Controller (MFC) connected to a pressure chamber for supplying gas to the chamber, which is an unpumped condition, includes cyclically switching the MFC to create successive fill cycles for a test period and measuring the chamber pressure at intervals during the test period. The method is characterised in that the total switch time of the MFC is at least 10% of the fill cycle and in that the method includes obtaining the average of the pressure measurements and comparing them with historical data to determine whether or not the MFC is functioning properly.

Abstract: Apparatus and method for monitoring operation of a flow metering system. In one embodiment, a flow metering system includes a flow meter, a first and second pressure sensors, a flow conditioner, and a condition monitor. The flow meter is configured to measure the volume of fluid flowing through the flow meter. The first pressure sensor is disposed proximate the flow meter to measure pressure of the fluid proximate the flow meter. The flow conditioner is disposed upstream of the flow meter. The second pressure sensor is disposed upstream of the flow conditioner to measure pressure of the fluid upstream of the flow conditioner. The condition monitor is coupled to the flow meter and the pressure sensors, and is configured to identify a potential discrepancy in operation of the flow metering system based on a difference between pressure measurements of the first and second pressure sensors.

Abstract: Apparatus and method for monitoring operation of an ultrasonic flow meter. In one embodiment, an ultrasonic flow metering system includes a passage for fluid flow, an ultrasonic flow meter, and a condition monitor. The ultrasonic flow meter is configured to measure transit time of an ultrasonic signal through the fluid flowing in the passage. The condition monitor is coupled to the ultrasonic flow meter and is configured to monitor a parameter of operation of the ultrasonic meter, and to acquire a plurality of values of the parameter over time. The condition monitor is also configured to compute, for each of the acquired values, a difference between the acquired value and a predetermined reference, and to arrange the differences in time sequence.

Abstract: Apparatus and methods for monitoring operation of an ultrasonic flow meter. In one embodiment, an ultrasonic flow metering system includes a passage for fluid flow, an ultrasonic flow meter, and a condition monitor. The ultrasonic flow meter is configured to measure transit time of an ultrasonic signal through the fluid flowing in the passage. The condition monitor is coupled to the ultrasonic flow meter and is configured to monitor a parameter of ultrasonic meter operation with respect to Reynolds number. The condition monitor is further configured to determine whether a value of the parameter at a Reynolds number of the fluid flowing in the passage at a time associated with the value is within a predetermined range of values for the parameter at the Reynolds number.

Abstract: A mass flow controller comprises a flow rate measuring part that measures a flow rate of a fluid flowing in a flow channel and outputs a measured flow rate value, a control valve, a valve control part that controls an opening degree of the control valve based on an entirely-close command to entirely close the control valve compulsorily or a set flow rate value set as a target value, and an external output part that outputs an external output flow rate value based on the measured flow rate value to the outside, and at a time when the valve control part receives the entirely close command or zero as the set flow rate value, the external output part outputs zero as the external output flow rate value, irrespective of the measured flow rate value.

Abstract: A device is provided for checking a flow pressure measurement probe as well as a probe comprising the device. The probe includes an internal volume and at least one orifice for communication with the outside of the volume. The device includes: an acoustic transmitter and an acoustic receiver that are intended to be connected to the internal volume so that the transmitter transmits an acoustic signal that propagates in the internal volume and so that the receiver picks up an observed acoustic signal; and, means for comparing the observed signal with a reference signal. The device may be a stand-alone device or may be integrated into the probe.

Abstract: A control system for calibrating a wind turbine sensor placed on a component of a wind turbine and related methods are disclosed. The wind turbine includes a rotor having at least one wind turbine blade. The method comprises pitching one or more of the at least one of the wind turbine blades according to a predetermined pitch movement which induces a vibratory motion in the at least one turbine blade. A wind turbine sensor measures a vibratory response signal at least partly caused by the vibratory motion. A characteristic sensor response value is determined from the vibratory response signal. The characteristic sensor response value may be compared to a predetermined sensor calibration parameter to determine whether a difference is greater than a predefined tolerance parameter. In this manner, the wind turbine sensor may be calibrated.

Abstract: A method of in line verification of a flow meter installed in a flow line by means of one or two ultrasonic clamp on flow meters to be installed in line with the flow meter u?comprising a preparatory phase, during which a virtual pipe diameter is determined, which if it had been applied during the simultaneous measurements would have minimized the differences between the measured flow indications of the flow meter and the measured flow indications, and comprising a verification phase, during which the ultrasonic flow meters are set up to determine their measured flow indications based on the virtual pipe diameter, during which simultaneously derived measured flow indications of the flow meter and the ultrasonic flow meters are recorded, and during which an alert is issued in case a deviation between simultaneously derived measured flow indications of the flow meter and the ultrasonic flow meter or between measured flow indications of the flow meter and averages of the measured flow indications of the ultrason

Abstract: A method is disclosed for determining leakby in a flow controller (100) comprising a flow sensor (102), a flow control valve (106) and electronics (104). The electronics are coupled to the flow sensor, the flow control valve and configured to adjust the flow control valve in response to the signal of the flow sensor indicating the flow rate of the material such that a set flow rate of material through the flow controller is maintained. The steps of the method comprise determining (302) a zero drift (Qdrift) value for the flow sensor (102). Determining (304) a flow rate (Qflow) through the flow controller (100) when the control valve (106) is in the fully closed position. And determining (306) the leakby through the flow controller (100) where the leakby is equal Qflow-Qdrift.

Abstract: Descriptions are provided for implementing flowmeter zero checking techniques. In operating a flowmeter, it may be the case that, even if previously calibrated, the flowmeter will produce erroneous measurements, e.g., will indicate a non-zero flow during a period of zero flow. Therefore, zero checking features are provided that allow for fast and accurate determinations of the zero-flow values, for use in adjusting later measurements. The zero-checking features include a button attached to an exterior of a flowmeter, so that it is easily accessible to an operator of the flowmeter. The button, in conjunction with an internal zero checking system, allows for a display of a zero value in response to a request from the operator of the flowmeter.

Abstract: A meter that monitors usage of a water distribution system by a client is provided. The meter includes a wireless communications system operable to communicatively couple the meter to a wireless network to provide two-way communication between the meter and the wireless network; a calibration system operable to calibrate the meter, wherein the calibration system may calibrate the meter in response to an instruction received via the wireless network; and a power system operable to maintain a sufficient level of power for the meter to allow substantially real-time communication between the meter and the wireless network.

Abstract: An object of this invention is to provide a superior mass flow meter or the like that can flexibly cope with a change of a sample fluid such as a gas kind without requiring a special troublesome labor and that can measure a flow rate with high accuracy. The mass flow meter comprises a sensor section that detects a flow rate of a sample fluid flowing in a flow channel, a setting section that sets a flow rate characteristic function that is intrinsic to each fluid to determine a flow rate based on a flow rate detected value output by the sensor section and an instrumental error correction parameter that is independent from the flow rate characteristic function and common to multiple sample fluids to correct an instrumental error of each mass flow meter, and a flow rate calculating section that calculates a flow rate measurement value of the sample fluid by applying the flow rate characteristic function and the instrumental error correction parameter to the flow rate detected value.

Abstract: Mass flow controllers with on-tool diagnostic capabilities and methods for on-tool diagnosis of mass flow controllers are disclosed herein. One disclosed method includes providing current to two heating-sensing elements of a mass flow sensor and modifying current through at least one of the heating-sensing elements. Reference data is obtained that characterizes proper operation of the mass flow sensor, and one or more flow sensor signals from the mass flow sensor are analyzed in connection with the reference data to assess whether the mass flow sensor is operating properly.

Abstract: A gas flow monitoring system is provided in process gas lines each arranged to supply gas to a predetermined process chamber via a flow control device, the system being configured to measure lowering or rising of gas pressure before and after the flow control device to monitor a flow rate of the flow control device. The system includes a first flow monitoring unit placed upstream of the flow control device in a selected one of the process gas lines, a second flow monitoring unit placed in a discharge passage upstream of the process chamber, and a controller that constantly monitors the flow rate of the flow control device with the first flow monitoring unit and, when the first flow monitoring unit detects the flow-rate abnormality two or more times, commands the second flow monitoring unit to re-verify whether flow-rate abnormality is present or not in the flow control device.

Abstract: A method for estimating and correcting or at least reducing phase errors in received ultrasonic signals in an ultrasonic flow meter is disclosed, the method including the steps of: measuring one or more signals in the ultrasonic flow meter, which one or more signals depend on characteristics of one or more ultrasonic transducers in the ultrasonic flow meter, using the one or more measured signals for calculating an estimated phase error value, and using the estimated phase error value for correcting transmission times measured by the ultrasonic flow meter.

Abstract: Methods for calibrating an emission rate measurement of a gas are provided. The methods involve discharging a reference gas that is the same or a different composition than a subject gas. If the same or similar, then a combined emission rate of the reference and subject gas is measured, as well as an emission rate of the subject gas only. A deviation, or an one or more adjusted parameter, of the combined and subject gas measurement from the reference gas discharge rate is used to calibrate the subject gas measurement. If the reference gas is different, the emission rates of the subject and reference gas are measured, and a deviation, or an one or more adjusted parameter, of the measured rate from the discharge rate of the reference gas is used in calibrating the subject gas measurement. The methods may also use a modified 2-D tracer measurement as a reference.

Abstract: The flow rate control device is provided with: a fluid resistor provided on the flow channel; a pressure sensor provided in any one of an upstream side or a downstream side of the fluid resistor; a pressure calculating part configured to calculate a pressure in a side with respect to the fluid resistor where the pressure sensor is not provided; a flow rate calculating part configured to calculate a flow rate based on the measurement pressure value and a calculation pressure value calculated by the pressure calculating part; and an abnormality diagnosing part configured to diagnose an abnormality of the measurement flow rate value based on the measurement flow rate value and a calculation flow rate value.

Abstract: A method for detecting angle sensor performance degradation in a flow angle measurement device in moving platform, such as aircraft and watercraft, as well as stationary platforms. Sensor dither in a flow angle measurement device is used to detect operational performance degradation of the sensor as a result of dynamic response changes caused by damaged or degraded mechanical components.

Abstract: Methods and apparatus for calibrating a plurality of gas flows in a substrate processing system are provided herein. In some embodiments, a substrate processing system may include a cluster tool comprising a first process chamber and a second process chamber coupled to a central vacuum transfer chamber; a first flow controller to provide a process gas to the first process chamber; a second flow controller to provide the process gas to the second process chamber; a mass flow verifier to verify a flow rate from each of the first and second flow controllers; a first conduit to selectively couple the first flow controller to the mass flow verifier; and a second conduit to selectively couple the second flow controller to the mass flow verifier.

Abstract: Apparatus and method for monitoring flow meter operation. In one embodiment, a flow metering system includes a flow meter and a condition monitor. The flow meter is configured to measure the volume of fluid flowing through the flow meter. The condition monitor is coupled to the flow meter is and configured to monitor a parameter of operation of the flow meter, and to record values of the parameter over a predetermined time interval. The condition monitor is further configured to determine reference values for the parameter based on the recorded values, and to apply the reference values to values of the parameter acquired after the predetermined time interval to validate operation of the flow metering system.

Abstract: A valve fully closing part; a calibrating volume calculation part that calculates a calibrating volume on the basis value of an integration of a flow rate measured value outputted from a flow rate sensor in a fluid parameter changing interval; and a calibration part that calibrates a flow rate on the basis of the calculated calibrating volume and a preset reference volume are provided.

Abstract: An apparatus for tuning pump speed at an optimal or desired speed using an automated method is disclosed. The apparatus includes a vacuum pump connected to a chamber for evacuating gas from the chamber. A sensor measures one or more characteristics, such as pressure, of the gas in the chamber. The measured characteristic is compared to a predetermined value. The speed of vacuum pump is adjusted based on the comparison until it falls in a desired range.

Abstract: A method for determining an error in a flow rate of a fluid flowing through a vibrating flow meter is provided. The method includes the step of receiving sensor signals from the vibrating flow meter. A first flow rate is determined using the sensor signals. A fluid density is determined. A fluid velocity is determined using the first flow rate, the fluid density, and a physical property of the flow meter. A flow parameter, V/p is calculated based on the fluid velocity and the density. A flow rate error is then determined based on the calculated flow parameter.

Abstract: In a mass flow controller verifying system, there are provided a verifying gas line arranged in parallel to influent flow gas lines and joined into a post-confluent flow gas line, a reference volume calculating portion adapted to calculate a reference volume determined for a specified piping of a gas piping system, a verifying parameter calculating portion adapted to calculate a verifying parameter based on time series data of a measurement pressure measured by a pressure measurement unit during a control of a flow rate by a mass flow controller to be verified, and a comparing portion adapted to compare a reference parameter set based on the reference volume and the verifying parameter, whereby the verifying system can be introduced into an existing gas piping system used in a semiconductor manufacturing process and so forth at a low cost and is capable of verifying a mass flow controller quickly and accurately.

Abstract: Integrated, stand-alone, multiple-purpose pump stands are provided for controlled pumping of different liquids from a stand-mounted tank to a downstream use location, e.g., a seed treating device. The pump stands are equipped with an operating assembly including a liquid tank, a powered pump, a liquid flow line equipped with a flow meter from the tank and pump to the use location, and a programmable digital control device. During operation, the control device serves to approach and maintain the flow rate from the pump stand at or about a desired setpoint flow rate.

Abstract: A method of ultrasonic clamp-on flow measurement according to the transit time difference method and apparatus for the implementation of the method, wherein the electromechanical transducer element of at least one of the two acoustic transducers is comprised of at least two array elements and a correction factor is determined by comparing the transit times between the acoustic transducers while using different array elements.

Abstract: Zero and calibration drift errors in a magnetic flow meter can be detected and automatically corrected. A zero error can be detected by measuring an amplifier output when the meter's electromagnet is inactive. Automatic calibration of the span can be done by adding a signal to a measured electrode voltage at an amplifier input, subtracting the expected amplified value of that signal at the output and adjusting the amplifier gain responsive to the difference in signal magnitude.