What is an industrial thermal resistance calibration furnace?
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1. Overview: The thermal resistor calibration furnace is a necessary device for quality inspection departments and temperature measurement departments to test the temperature-resistance characteristics of large-scale and wide-ranging industrial thermal resistors.
2. Main technical parameters
(1) Detection temperature range 100-600℃
(2) Within 150°C from the bottom of the detection tube, the temperature difference between any two points does not exceed 1K
(3) The temperature difference between each hole (four detection holes) does not exceed 1K
(4) Power supply voltage 50Hz220±10%V
(5) Maximum heating power 3.5kva
What is an industrial thermal resistor calibration furnace? (6) Dimensions: width × thickness × height = 410×410×750? (7) Weight: about 32?-->
Thermal resistors are a commonly used temperature measuring element in the medium and low temperature range. They are widely used in thermal power generating units. Understanding the working principle of thermal resistors and applying them to actual production is of great significance to ensure the accuracy and reliability of thermal measurement. This article introduces the temperature measurement principle of thermal resistor elements and analyzes common faults in combination with actual field applications. Thermal resistors measure temperature based on the thermal effect of resistors, that is, the resistance of the resistor changes with the change of temperature. Therefore, as long as the resistance change of the temperature-sensitive thermal resistor is measured, it can be converted into a voltage signal through the measuring bridge and sent to the display instrument to indicate or record the measured temperature.
Thermal resistors are a commonly used temperature measuring element in the medium and low temperature zone. They are widely used in thermal power generating units. Understanding the working principle of thermal resistors and applying them to actual production is of great significance to ensure the accuracy and reliability of thermal measurement. This article introduces the temperature measurement principle of thermal resistor elements and analyzes common faults in combination with actual on-site applications.
Thermal resistors measure temperature based on the thermal effect of resistors, that is, the resistance of the resistor changes with the change of temperature. Therefore, as long as the resistance change of the temperature-sensitive thermal resistor is measured, it can be converted into a voltage signal through the measuring bridge and sent to the display instrument to indicate or record the measured temperature.
Currently, the widely used thermal resistor materials are platinum and copper: platinum resistors have high precision, are suitable for neutral and oxidizing media, have good stability, have certain nonlinearity, and the higher the temperature, the smaller the resistance change rate; copper resistors have a linear relationship between resistance value and temperature within the temperature measurement range, have a large number of temperature lines, are suitable for non-corrosive media, and are easily oxidized when exceeding 150°C.
From the perspective of the change of resistance with temperature, most metal conductors have this property, but not all of them can be used as temperature measuring thermal resistors. The metal materials used as thermal resistors generally require: as large and stable temperature coefficient as possible, large resistivity (reducing the size of the sensor at the same sensitivity), stable chemical and physical properties within the temperature range of use, good material reproducibility, and resistance value should have an intermediate value function relationship with temperature change (preferably a linear relationship).
The resistance of the thermal resistor element changes with the temperature. It can be used to measure temperatures in the range of -200℃ to +800℃. Its advantages are: extremely small deviation. Due to its good electrical output performance, thermal resistors can provide accurate input values for digital displays, recorders, regulators, scanners and computers.
