A Method of Correcting the Deviation of Liquid-in-glass Thermometer
A liquid thermometer and temperature deviation technology, applied in the field of instruments, can solve problems such as unadjustable temperature, measured temperature error, and scale value deviation
Active Publication Date: 2021-02-02
HUNAN INST OF METROLOGY & TEST
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Problems solved by technology
After the liquid-in-glass thermometer is used many times, the scale value will deviate, and due to the limitation of the measured position, or the temperature cannot be adjusted, or the operation error, the measured temperature is not measured by full immersion or partial immersion as required. There is a large error, so a bias correction method is needed to make the measurement result more accurate
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[0042] 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.
[0043] A correction method for the deviation of a liquid-in-glass thermometer, characterized in that the correction method comprises the following steps:
[0044] S1. Select the temperature detection point of the thermometer according to the graduation value of the measured thermometer, at least three temperature detection points. The high-precision thermometer uses a standard platinum resistance thermometer and supporting electrical measuring equipment as the standard thermometer, and the ordinary thermometer uses a standard mercury thermometer as the standard thermometer. ;
[0045] When the division value is greater than or equal to 0.01 and less than or equal to 1, th...
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Abstract
The invention relates to the technical field of instruments, and provides a correction method for the deviation of a glass liquid thermometer, which includes the following steps: a standard thermometer and measured thermometers are vertically inserted into a thermostatic container according to the specified immersion requirements; the arithmetic mean value of the temperature deviation of the standard thermometer and the arithmetic mean value of the temperature deviation of each measured thermometer corresponding to each temperature point are calculated; and the corrected values of temperaturedeviation of the exposed liquid columns of the measured thermometers are calculated. Therefore, the corrected values of the deviations of the measured thermometers are calculated, and improvement is made on the problem of inaccurate measurement of the thermometer.
Description
technical field [0001] The invention relates to the technical field of instruments, in particular to a method for correcting the deviation of a liquid-in-glass thermometer. Background technique [0002] Liquid-in-glass thermometers measure temperature by using the temperature-sensing liquid in transparent glass temperature-sensing bubbles and capillaries to expand and contract with the temperature of the measured medium. According to the accuracy level, it can be divided into high-precision thermometers and ordinary thermometers. Thermometers can be divided into full immersion thermometers and partial immersion thermometers according to the immersion method. After the liquid-in-glass thermometer is used many times, the scale value will deviate, and due to the limitation of the measured position, or the temperature cannot be adjusted, or the operation error, the measured temperature is not measured by full immersion or partial immersion as required. There are large errors, s...
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IPC IPC(8): G01K15/00
CPCG01K15/005
Inventor 张遥奇柏文琦向德李庆先熊婕
Owner HUNAN INST OF METROLOGY & TEST