Packaging structure for thermistor temperature coefficient calibration

Abstract

The invention discloses a packaging structure for thermistor temperature coefficient calibration. The packaging structure comprises a standard temperature sensor, a sealing container, a copper wire, a constant temperature box, a connection plate and a resistance measuring meter; the sealing container is placed in constant temperature media in the constant temperature box, the standard temperature sensor and a thermistor to be calibrated are located in the sealing container, one end of the copper wire is connected with the inner wall of the sealing container, the other end of the copper wire is connected with the thermistor to be calibrated, the standard temperature sensor is connected with the middle of the copper wire, the output end of the standard temperature sensor and the output end of the thermistor to be calibrated are each connected with the input end of the resistance measuring meter through a container external connection board. By means of the packaging structure, temperature coefficient calibration on the thermistor without waterproof sealing can be accurately completed.

Description

Technical field [0001] The invention relates to a packaging structure, in particular to a packaging structure for calibrating the temperature coefficient of a thermistor. Background technique [0002] Thermistor plays a broad and important role in temperature measurement. To use thermistor to accurately measure the temperature of the object to be measured, it is necessary to understand and determine the temperature coefficient of the thermistor used. For mass-produced industrial thermistors, the temperature coefficient is usually given by the manufacturer, which can be directly accepted by the user, but for some user-customized thermistors or the thermistor whose temperature coefficient is not given by the manufacturer, the user needs to personally measure and Calibration. [0003] Commonly used temperature sensors can be roughly divided into two types from the packaging, one is a waterproof temperature sensor, and the other is a temperature sensor that is not sealed by a waterpro...

AI Technical Summary

Problems solved by technology

However, for thermistors that have not been waterproof and sealed, if the temperature coefficient is calibrated by directly immersing them in the constant temperature medium in the same way as the first type of thermistors, it may cause the danger of short circuit of the sensor and contamination by the medium, resulting in calibration failure.

Therefore, for thermistors that have not been waterproofed and sealed, a temperature control box with air as the heat transfer medium is usually used to calibrate the temperature coefficient. The lack of high precision cannot meet the needs of precise temperature measurement

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