Thermocouple Calibration System

Abstract

The invention proposes a thermocouple verification system, which can simultaneously verify the thermocouples of multiple furnaces; it includes a host computer, a multi-channel data collector and at least one temperature control circuit; when the verification heating furnace is working, there are built-in temperature control thermocouples, standard thermoelectric Couple and the thermocouple to be tested; the temperature control circuit is electrically connected to the state output terminal of the temperature control thermocouple in the verification heating furnace, the temperature control circuit monitors the temperature control thermocouple in real time, and according to the state data of the temperature control thermocouple, the verification The temperature of the heating furnace is controlled in real time; the multi-channel data collector is electrically connected to the state output terminals of the tested thermocouple and the standard thermocouple in the verification heating furnace; the multi-channel data collector collects the status of the tested thermocouple and the standard thermocouple The data is output to the host computer, and the host computer completes the verification of the thermocouple under test by processing the state data of the thermocouple under test and the standard thermocouple; the invention greatly improves the verification efficiency, and is scalable, real-time, and accurate. Compared with the prior art, the safety and safety are all improved.

Description

technical field [0001] The invention relates to the technical field of thermocouple verification, and specifically designs a thermocouple verification system. Background technique [0002] Temperature measurement is a key part of most industrial control, and its realization method is usually to contact the temperature sensor with the solid surface to be measured or immerse in the fluid to be measured to obtain its temperature parameters. Thermocouple is one of the most widely used temperature sensors in industrial production. The thermocouple sensor is composed of two different metals. One end of them is fixed together to form a sensitive junction. When the temperature changes, a corresponding thermoelectric potential will be generated. The temperature of the measured object can be known from the thermoelectric potential. The quality of thermocouples is directly related to the quality of products produced by industry. According to national metrology regulations, thermocoupl...

AI Technical Summary

Problems solved by technology

[0005] Existing single-channel control verification equipment usually uses standard thermocouples as temperature control couples. Although full-automatic control and data processing can be performed, the reliability and real-time performance are not high.

[0006] Poor safety, prone to accidents

Because it is controlled by a single unit and the power of the verification furnace is large (instantaneous current up to 20A), the wiring must be re-wired every time the verification furnace is replaced, which may easily cause ignition and cause safety accidents

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