Abrégé

In a method for creating a spark across a spark gap, in particular for igniting a flammable liquid to measure its flash point, by means of a spark generator which comprises an ignition transformer, wherein the spark generator, on the primary side of the ignition transformer, comprises at least one DC voltage source and, on the secondary side of the ignition transformer, comprises two electrodes delimiting the spark gap to be formed, wherein voltage pulses from the DC voltage source are applied to the ignition transformer on the primary side thereof, which voltage pulses generate ignition voltage pulses on the secondary side, the ignition transformer is operated in a first phase according to the flyback converter principle and in a subsequent, second phase according to the forward converter principle.

Classes IPC  ?

• F02P 3/04 - Schéma de montage des circuits
• F02P 9/00 - Commande de l'allumage par étincelle électrique, non prévue ailleurs
• H01T 15/00 - Circuits spécialement adaptés aux éclateurs, p.ex. circuits d'allumage

Abrégé

In a method for measuring the vapor pressure of liquid and solid substances, in which a sample of the substance is arranged in a variable volume of a measuring cell, the measuring cell is gas-tightly closed. The volume of the measuring cell is increased until reaching a measuring volume, and at least one first value of the gas pressure prevailing after the increase in volume is measured. The volume of the measuring cell is additionally reduced until reaching the measuring volume, and at least one second value of the gas pressure prevailing after the reduction of the volume is measured. The vapor pressure is calculated from the at least one first and at least one second measured values.

Classes IPC  ?

• G01N 7/14 - Analyse des matériaux en mesurant la pression ou le volume d'un gaz ou d'une vapeur en permettant au matériau d'émettre un gaz ou une vapeur, p.ex. la vapeur d'eau, et en mesurant une différence de pression ou de volume

Abrégé

In a method for forming a spark over a spark gap, in particular for the inflammation of a flammable liquid for measuring its flame point, with the aid of a spark generator which has an ignition transformer (2) and comprises on the primary side of the ignition transformer (2) at least one DC voltage source (1) and on the secondary side of the ignition transformer (2) two electrodes (5) delimiting the spark gap (6) to be formed, wherein voltage pulses from the DC voltage source (1) are applied to the ignition transformer (2) on the primary side and generate ignition voltage pulses on the secondary side, the ignition transformer is operated in a first phase on the basis of the flyback converter principle and in a subsequent, second phase on the basis of the forward converter principle.

Classes IPC  ?

• F02P 9/00 - Commande de l'allumage par étincelle électrique, non prévue ailleurs
• F02P 3/01 - Allumage par étincelle électrique sans stockage ultérieur d'énergie, c. à d. l'énergie étant fournie par un oscillateur électrique
• F02P 3/04 - Schéma de montage des circuits
• F02P 17/12 - Test des caractéristiques de l'étincelle, de la tension ou du courant d'allumage
• F02P 15/08 - Allumage par étincelle électrique ayant des caractéristiques non couvertes dans les groupes ou présentant un intérêt autre que celui visé par ces groupes à étincelles multiples, c. à d. allumage simultané en différents endroits d'un même cylindre ou dans plusieurs cylindres

Abrégé

The invention relates to a method for measuring the vapour pressure of liquid and solid materials, according to which a sample of the material is arranged in a variable volume of a measuring cell (9), the measuring cell (9) is closed in a gas-tight manner, the volume of the measuring cell (9) is increased until a measuring volume is reached and at least one first value of the gas pressure following the increase in volume is measured. According to the invention, additionally the volume of the measuring cell (9) is reduced until the measuring volume is reached and at least one second value of the gas pressure following the reduction in volume is measured, and the vapour pressure (3) is calculated from the at least one first and the at least one second measuring value.

Classes IPC  ?

• G01N 7/14 - Analyse des matériaux en mesurant la pression ou le volume d'un gaz ou d'une vapeur en permettant au matériau d'émettre un gaz ou une vapeur, p.ex. la vapeur d'eau, et en mesurant une différence de pression ou de volume
• G01N 7/16 - Analyse des matériaux en mesurant la pression ou le volume d'un gaz ou d'une vapeur en permettant au matériau d'émettre un gaz ou une vapeur, p.ex. la vapeur d'eau, et en mesurant une différence de pression ou de volume en chauffant le matériau

Abrégé

In a device for controlling the temperature of a test sample in a measuring device for measuring material properties of the test sample, comprising a measuring cell for receiving the test sample, at least one temperature controlling element, and a thermal storage element coupled to the temperature controlling element to transfer heat, wherein means are provided for changing the thermal resistance between the thermal storage element and the measuring cell in order to selectively couple or decouple the thermal storage element and the measuring cell in terms of heat transfer, the ratio of the thermal capacity of the thermal storage element to the thermal capacity of the measuring cell is greater than 1:1, preferably at least 2:1, preferably at least 5:1.

Classes IPC  ?

• G01N 25/52 - Recherche ou analyse des matériaux par l'utilisation de moyens thermiques en recherchant l'aptitude à l'explosion en déterminant le point d'éclair des liquides
• H01L 23/38 - Dispositifs de refroidissement utilisant l'effet Peltier
• F25B 21/02 - Machines, installations ou systèmes utilisant des effets électriques ou magnétiques utilisant l'effet Nernst-Ettinghausen
• G01N 25/50 - Recherche ou analyse des matériaux par l'utilisation de moyens thermiques en recherchant l'aptitude à l'explosion
• F28D 20/02 - Appareils ou ensembles fonctionnels d'accumulation de chaleur en général; Appareils échangeurs de chaleur de régénération non couverts par les groupes ou utilisant la chaleur latente
• F28F 13/00 - Dispositions pour modifier le transfert de chaleur, p.ex. accroissement, diminution

Abrégé

In the case of a method for measuring the vapor pressure of liquid and solid materials, in which method a sample of the material is arranged in a sample container, and the sample container is connected, by means of an inlet line, to a measurement cell for determining the vapor pressure, and the pressure provided by the gaseous portion of the sample via the inlet line is measured in the measurement cell, it is provided that the entire liquid and/or solid portion of the sample remains in the sample container during the measurement and only gaseous portions of the sample are conducted into the inlet line.

Classes IPC  ?

• G01N 1/22 - Dispositifs pour prélever des échantillons à l'état gazeux
• G01N 7/14 - Analyse des matériaux en mesurant la pression ou le volume d'un gaz ou d'une vapeur en permettant au matériau d'émettre un gaz ou une vapeur, p.ex. la vapeur d'eau, et en mesurant une différence de pression ou de volume
• G01N 7/16 - Analyse des matériaux en mesurant la pression ou le volume d'un gaz ou d'une vapeur en permettant au matériau d'émettre un gaz ou une vapeur, p.ex. la vapeur d'eau, et en mesurant une différence de pression ou de volume en chauffant le matériau

Abrégé

In a method for determining the low-temperature properties of a paraffin-containing fuel, the fuel is conducted from a storage chamber through a measuring cell provided with a sieve, the measuring cell is cooled by means of a cooling device, the temperature of the fuel in the measuring cell is measured, and a fluid pressure representing the flow resistance occurring on the sieve is measured, and the temperature occurring at a defined fluid pressure set point is determined and output as a result of the method, wherein, for the pressure measurement, a defined sample amount of the fuel is abruptly delivered from the storage chamber in order to obtain a pressure pulse.

Classes IPC  ?

• G01N 25/00 - Recherche ou analyse des matériaux par l'utilisation de moyens thermiques
• G01N 33/28 - Huiles
• G01N 11/08 - Recherche des propriétés d'écoulement des matériaux, p.ex. la viscosité, la plasticité; Analyse des matériaux en déterminant les propriétés d'écoulement en mesurant l'écoulement du matériau à travers un passage étroit, p.ex. un tube, une ouverture en mesurant la pression nécessaire à la production d'un écoulement connu
• G01N 25/04 - Recherche ou analyse des matériaux par l'utilisation de moyens thermiques en recherchant le frittage du point de ramollissement

Abrégé

The invention relates to a device for controlling the temperature of a test sample in a measuring device for measuring material properties of the test sample, comprising a measuring cell for receiving the test sample, at least one temperature controlling element, and a thermal storage element which is coupled to the temperature controlling element so as to transfer heat. Means are provided for changing the thermal resistance between the thermal storage element and the measuring cell in order to selectively thermally decouple the thermal storage element and the measuring cell or to couple the thermal storage element and the measuring cell together so as to transfer heat. The ratio of the thermal capacity of the thermal storage element to the thermal capacity of the measuring cell is greater than 1:1, preferably at least 2:1, preferably at least 5:1.

Classes IPC  ?

• G01N 25/52 - Recherche ou analyse des matériaux par l'utilisation de moyens thermiques en recherchant l'aptitude à l'explosion en déterminant le point d'éclair des liquides
• F28F 13/00 - Dispositions pour modifier le transfert de chaleur, p.ex. accroissement, diminution
• H01L 23/38 - Dispositifs de refroidissement utilisant l'effet Peltier
• H05K 7/20 - Modifications en vue de faciliter la réfrigération, l'aération ou le chauffage

Abrégé

The invention relates to a method for determining the low-temperature properties of a paraffin-containing fuel. According to said method, the fuel is guided out of a storage chamber through a measuring cell provided with a screen, the measuring cell is cooled by means of a cooling device, the temperature of the fuel in the measuring cell is measured, and a liquid pressure representing the flow resistance encountered at the screen is measured and the temperature occurring at a defined set point value of the liquid pressure is determined and provided as a result of the method, wherein, for the pressure measurement, a defined sample amount of the fuel is abruptly ejected out of the storage chamber in order to obtain a pressure pulse.

Classes IPC  ?

• G01N 11/08 - Recherche des propriétés d'écoulement des matériaux, p.ex. la viscosité, la plasticité; Analyse des matériaux en déterminant les propriétés d'écoulement en mesurant l'écoulement du matériau à travers un passage étroit, p.ex. un tube, une ouverture en mesurant la pression nécessaire à la production d'un écoulement connu
• G01N 33/28 - Huiles

Abrégé

For a device for measuring the flash point of liquids and solids in a measurement chamber (1), which is formed by a measurement basin and a lid (2) and which is provided with means for heating the liquid or the solid in the measurement basin, an electrical igniter having a spark gap (9), temperature sensors (5, 6), a pressure measuring apparatus (4), and a press-on apparatus for tightly connecting the measurement basin and the lid (2), a control device is also provided in order to control the heating means, the igniter, and the press-on device and to collect the measured values of the temperature sensors (5, 6) and of the pressure measuring apparatus (4), and the control device is formed by a computer designed as an embedded system (20), in particular an embedded PC, which is connected to the heating means, the igniter, the press-on device, the temperature sensors (5, 6), and the pressure measuring apparatus (4) by means of an interface device, and the measurement chamber (1) and the control device are arranged in a common housing.

Classes IPC  ?

• G01N 25/50 - Recherche ou analyse des matériaux par l'utilisation de moyens thermiques en recherchant l'aptitude à l'explosion
• G01N 25/52 - Recherche ou analyse des matériaux par l'utilisation de moyens thermiques en recherchant l'aptitude à l'explosion en déterminant le point d'éclair des liquides
• H05K 9/00 - Blindage d'appareils ou de composants contre les champs électriques ou magnétiques

Produits et services

Petrochemical measuring devices; Measuring devices for analysing the composition of oil refinery products. Repair, maintenance and installation of measuring equipment. Engineering; Chemistry services; Physics research; Physical and chemical research; Providing technical know-how; Consultancy relating to the assessment and development of chemical and physical processes; Technical measuring and testing; Calibration and function testing of measuring apparatus; Development of software for measuring devices and telemetry apparatus, telematics and connection to laboratory networks; Development of industry standards and consultancy relating thereto.

Produits et services

Meters; Measuring instruments; Precision measuring apparatus; Petrochemical measuring apparatus; Measuring apparatus for determining the physical and chemical properties of crude oil refinery products, chemicals, solvents and solids. Repair, maintenance and installation of measuring equipment. Engineering; Chemistry services; Physics research; Physical and chemical research; Providing technical know-how; Consultancy relating to the assessment and development of chemical and physical processes; Technical measuring and testing; Calibration and function testing of measuring apparatus; Development of software for measuring devices and telemetry apparatus, telematics and connection to laboratory networks; Development of industry standards and consultancy relating thereto.

Produits et services

petrochemical and chemical testers for field and laboratory analyses in a broad spectrum of industries to include food quality and safety; flavor and fragrance development; environmental sciences; pharmaceuticals; plastics; paints and coating; and government and transportation sectors, namely vapor pressure testers, flashpoint testers, fuel analysis testers, color testers, density testers, viscosity testers, and calibration testers regular maintenance, repair and upgrades for petrochemical and chemical testers for field and laboratory analyses in a broad spectrum of industries