Abstract: The container serves for mixing and measuring multi-phase fluids which are conducted in via a supply tube. The liquid and gaseous components are separated in the container and collected into a liquid volume as well as a gas volume. A liquid surface forms at the separating layer between the gas volume and the liquid volume, the actual height of which is measured by a sensor. The fluids located in the container are drawn back off out of the container in the direction of flow in a flowing manner via a removal apparatus which comprises at least one removal apparatus as well as a drainage means adjoining it and are thereupon mixed. The drainage means is arranged vertical to the liquid surface and has openings which lie partly below and partly above the liquid surface during normal operation of the container. The drainage means has a Venturi nozzle in the region of the inlet opening in order to measure the flow rate of the gaseous component which flows through the inlet opening into the drainage means.

Abstract: A shield is disposed between a gas chromatograph unit and a mass spectrometer unit and, further, the space between the gas chromatograph unit and the space the shield and the mass spectrometer unit are ventilated by a ventilating fan or ventilating fans. Thus the change in the temperature of the mass spectrometer unit is suppressed within a small range, so that the accuracy of analysis is enhanced.

Abstract: There is disclosed a method and apparatus for testing inflated vehicle tires to determine internal physical characteristics such as tire pressure. The apparatus includes a waveform transceiver for subjecting a tire to be tested to a transmitted waveform and for transmitting an ultrasonic waveform from a location external to the tire under test and for receiving the ultrasonic waveform from a tire under test at a location external thereto; and a processor for interpreting the received waveform with reference to the decay or attenuation of the amplitude of the waveform with time to provide a measure of the internal physical characteristic.

Abstract: Methods for the prediction of the frequency of high order resonant ultrasound spectroscopy (RUS) diagnostic modes are used to limit the band width of diagnostic testing at high order mode frequencies. Testing of parts at low order frequency modes is used to calculate part dimensions, and then these calculated part dimensions are used to predict high order diagnostic mode frequencies. Lower order mode frequencies are used to predict high order diagnostic mode frequencies.

Abstract: A method and apparatus for measuring and controlling the size of drops of viscous material dispensed from a dispensing system. A dispensing apparatus in accordance with embodiments of the present invention includes a housing, a dispenser that dispenses a quantity of the viscous material, a measuring apparatus having a bottom plate to receive the viscous material, a top plate that is positioned over the bottom plate after the viscous material has been dispensed, and a compressing apparatus that compresses the material between the top and bottom plates. The dispensing apparatus further includes a viewing system that views the compressed material to determine the quantity of material dispensed by the dispenser. In one embodiment, the dispensing apparatus includes a controller that controls the quantity of viscous material dispensed based on the quantity of material determined by the viewing system.

Abstract: A pressure data validation method which measures differential pressure along with measuring the absolute pressure while testing a well. The method uses a differential pressure gauge having a known distance between the two differential pressure measuring gauges, wherein the pressure differential indicates fluid density. During the test, as each absolute pressure reading is taken, a differential pressure reading is also taken and this reading is used to determine the density of the fluid surrounding the gauge at the time of the measurement. Each measurement is compared to previous measurements, and a change in fluid density, and thus a change in the type of fluid, is displayed to indicate that any discontinuity in the pressure display is due to a fluid boundary.

Abstract: A process for measuring the vapor transmission rate characteristics of a test material by first measuring the vapor transmission through a test chamber and sample material and subsequently repeating the measurement with the test material adjacent the sample material. By subtracting the first measured transmission rate reciprocal from the second measured transmission rate reciprocal, a value is determined which is the reciprocal of the vapor transmission rate characteristic of the test material.

Abstract: According to the present invention, a leakage measurement apparatus includes a volume metering device having a diaphragm which is displaced in accordance with a change in volume of the measurement medium leaked from an object and transmitted to the diaphragm. The volume of the leakage is calculated based on the change of the displaced amount of the diaphragm. In this way, the amount of leakage can be measured directly from the change in volume of the measurement medium. Further, the volume of the leakage can be measured without being affected by a change in pressure, and the accuracy of measurement can be improved.

Abstract: A photo-acoustic leak detection system for detecting a gas leaking from a component 30, includes at least two laser beams 24,26, incident on the component 30 and disposed so as to completely illuminate an inspection region 159 around at least a portion 28 of the component 30, each beam having a corresponding wavelength .lambda..sub.1 which is absorbed by the gas, the gas emitting an acoustic signal 36 when the gas absorbs light from at least one of the beams, an acoustic sensor 40, which receives the acoustic signals 36 and provides a sensor signal indicative thereof on a line 42 to a bandpass filter 44 and a synchronous detector 18 which provide a filtered signal indicative of the acoustic signal 36 on a line 50 to a signal processor 52. The processor 52 provides an output signal indicative of the leak in the component 30.

Abstract: An improved interconnect for semiconductor dice, a method for testing dice using the interconnect, and a method for fabricating the interconnect are provided. The interconnect includes dense arrays of contact members configured to establish temporary electrical communication with contact locations on a die under test. In addition, the interconnect includes patterns of multi level conductors formed on different levels of the substrate and separated by insulating layers. The multi level conductors can be formed with a higher density and with less cross talk than planar conductors to permit high speed testing of dice having a large number of bond pads. The interconnect can be configured for use with a temporary package for housing a single die for burn-in or other testing. Electrical paths between terminal contacts on the package and the multi level conductors on the interconnect can be formed by microbump tape having low resistance microbumps bonded to the multi level conductors.

Abstract: A non pressurized internal separator leak test method is disclosed for a two pass condenser in which helium is injected below a vertical manifold tank separator, allowed to rise, and detected or not detected above the separator. The helium cannot reach the upper side of the separator other than through a separator leak path, because it will not flow sideways down the flow tubes.

Abstract: A process and apparatus for determining the amount of contamination in the lubricant phase of a refrigeration system. The process utilizes a clear glass tube which contains an inert substance such as glass beads coated with a solvatochromic compound, preferably the solvatochromic compound is a mixture of Benzophenoxazine and Benzophenoxazone. A sample of the lubricant to be tested is passed into the glass tube and passes over the glass beads, picking up a portion of the solvatochromic compound. A white absorbent material such as sterile cellulose is positioned adjacent the coated substrate and the color reaction between the lubricant and the solvatochromic compound is clearly evident on the white absorbent material which then can be compared with a standard set of colors to determine the amount of the contamination.

Abstract: A process monitor test chip and methodology allows process-related manufacturing defects to be quickly identified and isolated. A basic circuit block of a test chip having a number of inverter cells serially connected with a corresponding number of observation points before the input of each inverter cell provides for the inverter cells in the basic circuit block to be probed and thus observed by e-beam technology. Any required number of basic circuit blocks may be serially connected end to end to constitute a chain circuit. Within the test chip itself, a plurality of chain circuits may be connected serially or in parallel to accomplish different testing goals. By controlling an input signal and a control signal of a multiplexing element associated with each chain circuit, the plurality of chain circuits can be forced into a serial connection or a parallel connection.

Abstract: A method of introducing selectivity to a non-selective gas sensor for determining an amount of a gas of interest contained in a measurement gas wherein the non-selective gas sensor responds not only to the gas of interest but also to other interfering gases contained in the measurement gas, the method includes the steps of periodically modulating a specified flux of a measurement gas at a first predetermined frequency, periodically modulating a specified flux of a gas of interest at a second predetermined frequency, adding the modulated flux of the gas of interest to the modulated flux of the measurement gas, exposing a non-selective gas sensor to the combination of the modulated flux of the measurement gas and the modulated flux of the gas of interest, measuring a sensor output of the non-selective gas sensor at zero frequency (DC) and at specified frequencies (AC), and determining an original concentration of the gas of interest in the measurement gas from the measured sensor output at zero frequency and at

Abstract: A method and apparatus for leak testing an article in which an evacuable test chamber and a mass spectrometer leak detector are provided. The conduit links the test chamber and the mass spectrometer. A first valve is provided nearer the test chamber and a second valve is provided nearer the leak detector for controlling the flow through the conduit and for defining between the valves the trapped volume that is associated with the conduit. The trapped volume is evacuated with the first valve closed and the second valve opened. The pressure differential between the first point situated intermediate the first valve and the test chamber is measured and a second point situated intermediate the second valve and the leak detector is measured. The pressure differential between the first and second points is measured and a pressure differential reference point is determined. The second valve is closed to form the trapped volume and the first valve is opened to communicate the trapped volume and the evacuation chamber.

Abstract: A gas flow distribution system accumulates a sample from a sample bearing carrier gas in a micro-accumulator, delivers it using a carrier gas to a gas chromatography column, and supplies a carrier gas to the gas chromatography column to facilitate separation of the sample into sample components and transport the sample components to a mass spectrometer for trace vapor detection and analysis or testing in real time. The system is made of inert components and configured to have low dead volume for improved performance and accuracy of detection. External valves are employed for easy management and balance of the flow in the system to minimize operation time and facilitate continuous accumulation, delivery, and testing of the sample. The delivery of the sample to the gas chromatography column using an electrically heated cold trap as the micro-accumulator can be performed extremely fast.

Abstract: A method of measuring external leakage, which comprises the steps of introducing a first gas different from main component gasses of an external atmosphere into a pipe having a leak, adding H.sub.2 gas (or H.sub.2 -containing gas) to the first has at a down-stream point, and measuring gas components entering from the external atmosphere of the leak by an atmospheric ionization mass spectrometer (atmospheric pressure ionization mass spectrometer) at a further downstream point (for example, N.sub.2 H.sup.+ is detected when the external atmosphere is the N.sub.2 gas). A method of measuring the external leakage of a gas supply piping line having a plurality of branch piping lines comprises the steps of introducing H.sub.2 gas (or a H.sub.

Abstract: A new test method to quantify capillary flow solderability on a printed wiring board surface finish. The test is based on solder flow from a pad onto narrow strips or lines. A test procedure and video image analysis technique were developed for conducting the test and evaluating the data. Feasibility tests revealed that the wetted distance was sensitive to the ratio of pad radius to line width (l/r), solder volume, and flux predry time.

Abstract: A device for measuring metal purity, comprising a receptacle for holding a sample of molten metal, the receptacle being made, at least internally, from an insulating refractory material and having a bottom wall provided with a hole containing a filter element. The bottom wall is substantially impermeable to air except at the hold. An enclosed collection vessel is positioned below the receptacle for collecting molten metal which passes through the filter element from the receptacle, the collection vessel having an opening permitting extraction of gas from within the vessel to enable a vacuum to be generated within the vessel during use of the device. A leak-tight seal is established between the receptacle for molten metal and the collection vessel to permit vacuum generated in the collection vessel to draw molten metal into the collection vessel from the receptacle through the filter.

Abstract: A leak test system is disclosed for a double block and bleed valve arrangement, the system including a second vent valve disposed along the bleed line and a secondary gas supply line connected to the bleed line for introducing gas at a known pressure into the bleed line to test the valves and ensure that they are not leaking. A pressure transducer is positioned to monitor the pressure within the bleed line. The pressure transducer is in communication with a processor which generates an alarm if the pressure in the bleed line changes, thereby indicating a leak. A method for testing each valve in the arrangement is also disclosed.