The temperature sensor in the application of the heat meter

It is well known that the sensor is one of the important parts of heat meter, including the temperature sensor and flow sensor. Now, our common heat meter using temperature sensors, are almost always USES the platinum thermal resistance, difference lies solely with the different types at home and abroad.

split type heat meter measuring accuracy

split type heat meter measuring accuracy is composed of three parts: the heat meter flow meter, temperature sensor and joint decision integrator their measuring accuracy, the error limit is the above three parts of arithmetic and ( And also is the absolute value of) 。

A matching temperature sensor calibration device's working principle is:

pairing will be inspection standard platinum resistance and temperature sensor at the same constant temperature trough, at three temperature, the temperature of test temperature sensor - Relationship between resistance and the calculate and determine the matching the accuracy of the temperature sensor.

B integrator prover working principle is:

with a standard pulse signal generator and standard resistance box is checked integrator providing simulation flow and temperature signal, after a period of heat integrating, will provide the standard calibration device of heat value and the heat value of test integrator shows comparison, to determine the accuracy of the integrator.

integrator C temperature sensor calibration device's working principle is:

2 by waterbath simulation heating pipe in water supply and return water temperature, using standard pulse signal generator provides the simulation flow, will be checked two standard platinum resistance thermometer and calculator two temperature sensor respectively in the two constant temperature in the sink, according to the heat energy table calculator shows the cumulative value of the heat and calculated from two standard temperature constant temperature trough the enthalpy difference compared with the standard product of flow of heat value, to determine the accuracy of the temperature sensor and a calculator.

heat metering error of temperature sensor measuring

heat meter is divided into integral and modular, for monolithic instrument, to measure the error of the temperature sensor, and integrator measurement at the same time, the temperature sensor error and the error of the integrator of additive is the result of the need to; And combined instrument, can the temperature sensor measurement alone.

temperature sensor measurement of specific methods is alone, put sensors in the environment of constant temperature, measuring sensor under different temperature showed that the error between the temperature and accurate temperature. Need to know is, in addition to the error of measuring temperature sensor alone, also check the sensor error of the matching part, is the sensor and integrator measurement at the same time, so you need according to different design principle of the integrator with the corresponding measurement method, two methods of measuring error of the measured combination can get the correct temperature sensor error.

more high-quality sensors at https://www. rtdcn。 Com /

key words: thermal resistance, thermocouple, thermal resistance, platinum resistance, PT100, PT1000, pressure sensor and digital temperature sensor