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Correction method for deviation of inclined micro manometer

A micro-manometer and tilt-type technology, applied in the field of manometers, can solve problems such as deviation in pressure measurement, and achieve the effects of easy pressure creation or depressurization, convenient operation and strong practicability.

Inactive Publication Date: 2019-10-22
HUNAN INST OF METROLOGY & TEST
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Problems solved by technology

The structural characteristics of the inclined micromanometer enable it to measure the small pressure of the gas, but it also causes deviations in the pressure measurement of the inclined micromanometer, such as the density of the working liquid, the air density, the inclination angle of the inclined tube micromanometer and the micro pressure of the curved tube. The inflection point of the manometer, so a correction method for the inclined micro-manometer is needed to improve the measurement accuracy

Method used

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  • Correction method for deviation of inclined micro manometer
  • Correction method for deviation of inclined micro manometer
  • Correction method for deviation of inclined micro manometer

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Embodiment Construction

[0045] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0046] The present invention is a method for correcting the deviation of an inclined micromanometer, characterized in that the correction method comprises the following steps:

[0047] S1. Stand still for 2 hours, adjust the level of the micromanometer so that the level bubble is at the center, inject the working liquid, and then use the method of repeated pressurization to remove the air in the liquid until the zero position of the micromanometer is stable; The working liquid of the inclined tube micromanometer generally has a density of 810kg / m 3 Ethanol, the working liquid of the curved tube micromanometer is generally with a density of 826kg / m 3 kerosene or blended o...

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Abstract

The invention relates to the technical field of pressure gauges. The invention is a correction method for the deviation of an inclined micro manometer. By comparing an inclined micro manometer with apressure standard and considering the working liquid density, the air density, the inclination angle of an inclined tube micro manometer and the inflexion point of a curved tube micro manometer, the problem that the measurement accuracy is affected is solved.

Description

technical field [0001] The invention relates to the technical field of pressure gauges, in particular to a method for correcting the deviation of an inclined micro-manometer. Background technique [0002] Inclined micromanometer is an instrument based on the principle of hydrostatics, which uses the height difference of the liquid column to measure pressure. It is mainly used for the measurement of gauge pressure and differential pressure. According to the structure classification, it can be divided into inclined tube micromanometer and curved tube The structural characteristics of the tube micro-manometer and the inclined tube micro-manometer are that the measuring tube is an inclined tube at a certain angle to the horizontal plane, which can amplify the small liquid column height difference by a certain ratio and improve the resolution of the measurement; the curved tube micro-manometer The structural feature of the meter is that the measuring tube is designed as an inclin...

Claims

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Application Information

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IPC IPC(8): G01L27/00
CPCG01L27/002
Inventor 柏文琦张遥奇向德李庆先朱先宇
Owner HUNAN INST OF METROLOGY & TEST
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