装PT100 - The temperature sensor is how to test?

As we all know, some of European customers are relatively strict with something. A series of temperature and pressure in recent years, China's manufacturing, products are exported to Europe and the United States, it's not, a recent European customers to purchase a batch of PT100 temperature sensor, to reach the standard of European customers, detection is very important, the following will introduce PT100 temperature sensor with thermocouple detection: PT100 temperature sensor using thermocouples detect temperature fluctuations of the amplitude of the furnace temperature fluctuation amplitude of the small. Measurement lags behind, the greater the fluctuation amplitude of the thermocouple is smaller, and the actual temperature difference. When using the time constant of thermocouple temperature or temperature control, instrument display temperature fluctuation is small, but the actual furnace temperature fluctuations can be quite large. Because the thermistor is a resistive device, any current source is the fever caused by power. Power is equal to the current square and resistance of the product. So you want to use a small current source. If the thermistor is exposed to high fever, will result in permanent damage. Therefore PT100 temperature sensor to protect the space between the tube and furnace wall hole used refractory mortar or insulating material such as asbestos rope jam to avoid cold and hot air convection and affect the accuracy of temperature measurement; Thermocouple cold end is too close to the furnace temperature over 100 ℃; The installation of thermocouples should as far as possible to avoid the strong magnetic field and strong electric field, to determine the true temperature of the object surface emissivity correction must be conducted. And emission rate depends not only on material surface temperature and wavelength, but also with the surface state, coating, and microstructure and so on, so it is difficult to measure accurately. General PT100 temperature sensor measurement accuracy is higher. At a certain temperature range, the thermometer can measure the temperature distribution within the object. But for the movement of body or heat capacity is very small, small target object will produce larger error of measurement, the commonly used liquid thermometer with double metal thermometer, glass thermometer, pressure type thermometer, resistance thermometer, thermistor, thermocouple, etc. They are widely used in industry, agriculture, business, etc. This more make it widely used in the areas of production practice, also offers numerous benefits for people's life and function.