| 摘要 |
PURPOSE:To obtain highly accurate calibration data for every piece of thermistors to be calibrated by easy operation, by constituting the device based on the detected value of the thermistor to be calibrated at a calibrating temperature point. CONSTITUTION:Temperature sensitive elements, which are bodies to be calibrated 23a-23q, comprise a platinum temperature measuring resistor, a thermistor element, or a thermocouple, and the like, which are not calibrated yet. The measured temperature data of the resistor and the thermistor elements are expressed in resistance values. The data of the thermocouple is expressed in output voltage value. When a hot junction is provided in a temperature environment part 21 for the thermocouple, the temperature of a cold junction should be kept at the other comstant temperature. A switch part 24 has a multiplexer function, by which one of a reference temperature measuring body 22 and the bodies to be measured 23a-23g are selected and connected to a measuring part 25, namely multiple inputs and outputs are selected, in accordance with the control of a control part 10. The measuring part 25 measures the resistance value of the reference temperature measuring body 22 to be measured in accordance with the measuring clock from a clock generating part 13. The measured resistance value is converted into digital data by a built-in A/D converter function, and the data is sent to an operating part 12. |
