Thermometer calibration device

Abstract

The invention relates to a thermometer calibration device, which is characterized in that the thermometer calibration device comprises a refrigerating machine, a heating assembly connected with a cold head of the refrigerating machine, and a constant temperature block and a bonding wire assembly which are respectively connected with the heating assembly, and the constant temperature block is used for fixing a standard thermometer and a to-be-calibrated thermometer; the bonding wire assembly is used for being welded to a lead of the standard thermometer and a lead of the to-be-calibrated thermometer, so that heat balance is achieved among the refrigerator, the heating assembly, the constant-temperature block and the bonding wire assembly. The profound hypothermia thermometer calibration device has the advantages that the profound hypothermia thermometer can be calibrated, so that the accuracy of temperature measurement by using the profound hypothermia thermometer is improved.

Description

technical field [0001] The invention relates to the technical field of thermometers, in particular to a thermometer calibration device. Background technique [0002] Temperature is one of the most basic physical dimensions. It is an important attribute to evaluate substances and the environment. It is also an indispensable existence in production and life. Therefore, effective monitoring of temperature is extremely necessary. As a device that can monitor temperature, thermometers are widely used in production and life. In recent years, in the fields of aerospace, clean energy, biomedicine, and scientific research, thermometers that can detect in extremely low-temperature environments are required. For this reason, researchers have developed a thermometer that usually covers 4K~150K (-269°C~123°C) The accuracy of the measurement data of the deep low temperature thermometer in the temperature zone is related to the success or failure of the above-mentioned production, process...

AI Technical Summary

Problems solved by technology

In the prior art, temperature sensors such as platinum resistors and thermocouples for industrial use above -200°C have standard graduation tables, and the comparison relationship can be obtained through the standard temperature degree and the thermometer to be calibrated under certain control conditions. However, due to the actual production process There are slight differences in alloy content, manufacturing process, etc. among various manufacturers, and the relationship between the real physical signal (such as resistance) and temperature will inevitably deviate from the standard graduation table, especially in the temperature zone below -80°C. Therefore, there is an urgent need for a thermometer calibration device to calibrate the cryogenic thermometer

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