Viscometer and a method for operating the same
AssigneePoulten Selfe & Lee Ltd.
InventorsStephen J. Gosling, Ian Mylrea
Life of this patent
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Abstract
A viscometer adapted to determine a temperature at which a liquid test sample has a predetermined viscosity. A method of operating a viscometer comprising the steps of: drying the air contained in the capillary tube; advancing the liquid test sample from the sample reservoir to the capillary tube; changing the temperature of the liquid test sample to a first sub-zero degrees Celsius temperature, and determining a first viscosity of the liquid test sample at the first sub-zero degrees Celsius temperature. Use of a capillary tube for determining a temperature at which a liquid test sample has a predetermined viscosity.
Claims15
A viscometer adapted to determine a sub-zero degrees Celsius temperature at which a hydrocarbon, synthetic or semi-synthetic aviation fuel has a predetermined viscosity, the viscometer comprising:
- a capillary assembly comprising at least one of a capillary tube and a timing bulb;
- a sample reservoir fluidly connected to the capillary assembly;
- a built in apparatus to remove moisture in air in the viscometer;
- an air pump for advancing the liquid test sample from the sample reservoir to the capillary assembly;
- and
- an apparatus for controlling the temperature of the liquid test sample,
- wherein the temperature at which the viscosity is determined is a temperature below zero degrees Celsius, and
- wherein the built in apparatus removes the moisture before the air pump advances the liquid sample to the capillary assembly and prior to a measurement cycle.
A method of operating a viscometer which comprises a capillary assembly, a sample reservoir fluidly connected to the capillary assembly, a built in apparatus to remove moisture in air in the viscometer, an air pump for advancing the liquid test sample from the sample reservoir to the capillary assembly, and an apparatus for controlling the temperature of the liquid test sample, the method comprising the steps of:
- removing moisture in the air in the viscometer;
- advancing the liquid test sample from the sample reservoir to the capillary assembly;
- changing the temperature of the liquid test sample to a first temperature below zero degrees Celsius, and
- determining a first viscosity of the liquid test sample at the first temperature below zero degrees Celsius,
- wherein the built in apparatus removes the moisture before the air pump advances the liquid sample to the capillary assembly and prior to a measurement cycle.
Dependencies are inferred from the claim text.