JP2007178412A - Thermocouple system for heating measurement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thermocouple system for heating measurement having a temperature detecting and heating function, and a sample holding function in a thermocouple, and capable of improving a temperature control function, sample observation and data recording or the like. <P>SOLUTION: This thermocouple system is provided with a heating measurement unit 1 constituted to electrify and heat the thermocouple 3 holding a sample 6 with a half-cycle rectangular wave by a heating electric power source part 23, while conducting alternately switching between the heating electric power source part 23 and a measuring part 24 by a heating measurement switching part 22, to digital-convert an analog temperature signal based on electromotive force from the thermocouple 3 in an A/D-conversion part 25 during the next half cycle, by the measuring part 24, to receive and control a converted digital temperature signal in a control part 21, to analog-convert the digital temperature signal in the control part 21 by a D/A-conversion part 26, and to receive an analog value to be temperature-controlled by a temperature regulation part 27, and a setting operation means 2 allowing various setting operations, and a melting state of the sample, a reaction of a molten body with a solid or the like can be easily and directly observe in a prescribed observation temperature, by the system. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a thermocouple system for heating measurement in which a thermocouple method having a sample holding function, a heater function, and a temperature detection function is improved with respect to a temperature control function, sample observation and data recording. is there.

Technical background

  In conventional high-temperature science research, as a device for directly observing the molten state and the reaction between the melt and the solid, as the heating power source, the filament with the thermocouple formed at half the commercial frequency is heated and the remaining half cycle In this case, there is a method in which the heating current flowing in the filament is interrupted by a silicon rectifier, connected to a temperature measuring circuit by a high-speed relay, and the thermoelectromotive force is detected and recorded by a DC voltage measuring device. In the hot thermocouple method described in thermal measurement 13 (2) 1986, a heat-resistant and corrosion-resistant R thermocouple is used as a heating filament and temperature measuring element, and the thermocouple is attached to a sample container made of hard glass and equipped with cooling means. The sample to be observed is held on the surface and observed with a stereomicroscope while heating and cooling the sample. For example, the melting and solidification process of the mineral sample can be directly observed and recorded along with the temperature, or the liquid phase in the glass forming system. The line temperature can be determined.

  Although no method corresponding to the hot thermocouple method is found in the patent publication, Japanese Patent Application Laid-Open No. 2002-107317 discloses a high-temperature observation apparatus that observes changes in the appearance of a sample while heating and cooling the sample and detecting the temperature. As described above, a high-temperature observation apparatus for observing a change due to a heating temperature of a sample, which is a high-temperature chamber having an airtight structure, a sample stage disposed in the center of the high-temperature chamber and mounting a sample, and a sample on the sample stage Heating means and cooling means for heating and cooling, temperature detection means for detecting the temperature of the sample heated and cooled by these heating means and cooling means, and heating means and cooling based on the detection result of this temperature detection means Control means for controlling the means, at least one image pickup means for picking up an image of the sample temperature-controlled by the control means through an observation window provided in the high temperature chamber, and the image pickup means There is high temperature observation apparatus provided with a monitor displaying an image video.

  Further, the sample stage includes a substrate on which the sample is placed and a support body connected to the substrate via a heat insulating member, and the heating means sandwiches the sample stage diagonally above both sides of the sample stage. Two upper heaters arranged side by side in this manner, and two lower heaters arranged side by side at a position sandwiching the sample table diagonally below both sides of the sample table and arranged narrower than the distance between the upper heaters The temperature detecting means has a thermocouple, and the thermocouple is inserted into a recessed portion formed on the back surface of the substrate.

Reference 1

Kenji Morinaga, Kunihiko Nakajima, Norio Ota, Thermal Measurement 13 (2) 1986
JP 2002-107317 A

  The hot thermocouple method described in the above document has a small sample amount and a small heat capacity of a thermocouple as a heating means, so it can be rapidly heated and cooled, and can be measured up to a high temperature of 1900K. Although recording is possible, manual control, such as temperature control such as temperature rise and temperature drop, observation recording, etc. requires technique and patience, long measurement time, heavy burden on the measurer, and heat cycle is heat Since the electromotive force cannot be captured, a sag (voltage drop) occurs in the measurement voltage due to the measurement circuit time constant, resulting in an error in the direct reading value. Therefore, it is necessary to correct the measurement value with a standard sample (NaCl) or the like. There was a drawback.

  In addition, the high-temperature observation apparatus described in Japanese Patent Application Laid-Open No. 2002-107317 performs temperature detection using a thermocouple, but is provided with a heater and a sample stand separately from the thermocouple. Since the function, heater function and sample holding function are not provided, the heat capacity of the sample stage is large, and the sample cannot be heated or cooled rapidly. Also, there is a difference between the sample temperature and the detected temperature. It tends to occur, and the configuration and contents are different from those of the present invention. In a conventional thermal analyzer such as a differential thermal analyzer, visible data on the melting point, freezing point, and transformation point of a sample cannot be obtained, and further, the operation is not easy. Further, since the temperature detection is a mechanism for detecting the external temperature of the sample pan, there is a drawback that it is not sensitive to subtle temperature changes.

  An object of the present invention is to improve a temperature control function, sample observation, data recording, and the like in a thermocouple having a temperature detection, a heater function, and a sample holding function.

  In order to solve the above problem, a thermocouple holding the sample to be observed is switched at a predetermined frequency using a variable direct current, and a voltage is applied to the thermocouple with a half-cycle rectangular wave to generate a heating current. The thermocouple and the sample are heated to flow, the heating current flowing through the thermocouple is shut off in the remaining half cycle, the thermoelectromotive force of the thermocouple is detected by the temperature measurement signal at the temperature measurement timing, the temperature is measured, and the sample is determined A heating measurement unit for observing temperature, an automatic temperature increase for automatically increasing the temperature according to a preset temperature increase gradient, an automatic temperature decrease for automatically decreasing according to a preset temperature decrease gradient, a predetermined value The thermocouple has a heater function, temperature detection function, and sample holding function by providing setting operation means that can perform setting operations such as maintenance of observation temperature, temperature recording at a predetermined point, and data recording at the start and end. Holding Because both the sample and thermocouple have a small heat capacity, the sample can be heated and cooled quickly, the accuracy and follow-up of the temperature measurement is improved, and various settings are facilitated. And the reaction between the melt and the solid can be easily and directly observed.

  In addition, the heating measurement unit is heated by energizing the thermocouple and heated, a measurement unit for measuring the thermoelectromotive force of the thermocouple, and heating for switching between the heating power supply unit and the measurement unit by switching at a predetermined frequency. A measurement switching unit, an A / D conversion unit that digitally converts an analog temperature signal based on the thermoelectromotive force measured by the measurement unit, a control unit that receives and controls the converted digital temperature signal, and a digital of the control unit It comprises a D / A converter that converts the temperature signal into analog and a temperature controller that adjusts the temperature by receiving the analog value. Based on the setting by the setting operation unit, the controller is a heating power supply unit at the heating measurement switching unit. With the heating power supply section, the thermocouple is energized with a half-cycle rectangular wave to heat it, and an analog thermoelectromotive force signal from the thermocouple is passed through the measurement section. The A / D converter converts the digital data and outputs it to a personal computer as temperature data. Subsequently, the digital temperature data is converted into analog data by the D / A converter. The temperature controller adjusts the setting by the setting operation unit and the temperature data of this digital value to perform temperature adjustment and PID control, and the control unit can perform heating measurement control, data processing, and condition setting. Assuming that a rectangular wave is used for the heating, the interface with the control unit becomes easy, the circuit becomes simple, and the advantage of digitizing the thermoelectromotive force signal by the A / D conversion unit is the heating cycle. Even if it is not possible to capture the thermoelectromotive force, the measured value is held until the next measurement cycle, so that no sag (voltage drop) occurs in the measured voltage. By digitalization, instead of the electromotive force generated by the thermocouple, a voltage equivalent to the thermoelectromotive force can be input from the tip of the thermocouple holder without generating a heating output, making it easy to calibrate and guarantee the system. Heating measurement control, data processing, and condition setting can be performed according to the setting.

  In addition, when a stereomicroscope for observing the state of the thermocouple and the sample is provided, a predetermined portion of the sample in the observation chamber is magnified and directly viewed, while the sample is melted or melted at a predetermined observation temperature. A solid reaction can be observed in detail.

  In addition, when a CCD camera, a telop device, a video system, and a display are provided to display and record the observation image through the stereomicroscope, the CCD camera takes a high-speed image of the image, and the telop device samples, temperature, etc. A predetermined telop is added, video data with a telop is recorded by a video system, and this video data can be observed on a display.

  When a personal computer as a data recording system is connected to the heating measurement unit, the personal computer captures temperature records such as the PID temperature control status, set temperature, and measured temperature of the heating measurement unit as trend data and saves them in a file. Can be recorded and saved.

  When a personal computer is connected to the telop device, video system and heating measurement unit to control the telop device, video system and heating measurement unit and to record data, the personal computer controls the telop device and video system. As a data recording system, it is possible to record and save observation records such as video data and PID temperature control status, set temperature, measurement temperature, etc. of the heating measurement unit 1 as trend data and save it in a file.

  While measuring the temperature of the changing sample with a thermocouple while giving the temperature change to the sample to be observed with the thermocouple, observe the temperature characteristics of the sample based on the temperature change with the stereomicroscope, Assuming that thermal analysis is performed by taking data obtained by measurement and observation, the endothermic and exothermic reactions of samples that occur during the process of automatic temperature rise, automatic temperature drop, or constant temperature heating are unique changes on the trend record data. Because it draws a curve, it is possible to detect the thermal transformation point of the sample, and it is possible to visually observe the state of the sample, and it is necessary to capture extremely subtle temperature changes in the endothermic and exothermic reactions of the sample. However, in this method, the temperature detector is in direct contact with the sample, and this can be detected extremely sensitively.

  In addition, automatic temperature increase that automatically increases the temperature of the personal computer according to a predetermined temperature increase gradient, automatic temperature decrease that automatically decreases the temperature according to a predetermined temperature decrease gradient, maintenance of a predetermined observation temperature, temperature recording at a predetermined point If the setting operation means is capable of performing setting operations such as data recording at the start and end, the temperature is also increased from the personal computer (for example, three types of preset temperature increases of 10 ° C./min, 100 ° C./min, 500 ° C./min). The temperature is automatically raised according to the temperature gradient), the temperature is lowered (for example, 10 ° C./min, 100 ° C./min, 500 ° C./min, the temperature is automatically lowered according to a preset temperature gradient), temperature maintenance, temperature Setting operations such as recording (for example, 5 points) and data recording (for example, 2 points of start and end) can be performed.

  In addition, the heating measurement unit and a personal computer are connected with a communication cable, and the melting and solidification process of the sample is directly observed with a stereomicroscope while remotely operating the entire system and recording the measured / set temperature with this personal computer. However, it should be recorded with temperature.

  Since the present invention is configured as described above, in claim 1, the thermocouple is provided with a heater function, a temperature detection function, and a sample holding function, and both the sample and the thermocouple have a small heat capacity so that the sample can be rapidly heated and cooled quickly. The temperature measurement accuracy and follow-up are improved, and various settings such as automatic temperature rise, automatic temperature drop, temperature maintenance, temperature recording and data recording are facilitated. It is possible to provide a thermocouple system for heating measurement capable of easily and directly observing a reaction between a melt and a solid.

  In the second aspect, the use of a rectangular wave for heating facilitates the interface with the control unit, simplifies the circuit, and digitization of the thermoelectromotive force signal by the A / D conversion unit makes it possible to generate heat in the heating cycle. Even if the power is not captured, the measured value is held until the next measurement cycle, and no sag is generated in the measured voltage.Accurate measurement is possible, and digitization enables the heating output to be used instead of the electromotive force generated by the thermocouple. It is possible to provide a thermocouple system for heating measurement that can input a voltage equivalent to a thermoelectromotive force without generating it, easily calibrate and guarantee the system, and perform heating measurement control, data processing, and condition setting according to the setting. I can do it.

  In the third aspect, the predetermined state of the sample in the observation chamber is magnified by the stereomicroscope, and the molten state of the sample at the predetermined observation temperature and the reaction between the melt and the solid are observed in detail while directly observing with the eyes. In claim 4, the video is taken at a high speed by a CCD camera, a predetermined telop such as a sample or temperature is added by a telop device, and video data with a telop is recorded by a video system. Video data can be observed.

  Further, in claim 5, the personal computer can record and save observation records such as PID temperature control status of the heating measurement unit, set temperature, measurement temperature, etc. as temperature data, and save it in a file. In claim 6, the personal computer controls the telop device and the video system, and captures the temperature data such as the video data and the PID temperature control status, the set temperature, and the measured temperature of the heating measurement unit 1 as the data recording system as the trend data, Observation records can be recorded and saved, such as saving to a file.

  Further, in claim 7, when performing thermal analysis, the endothermic and exothermic reactions of the sample that occur during the process of automatic temperature rise, automatic temperature drop, or constant temperature heating draw a unique curve on the trend record data. The thermal transformation point of the sample can be detected and its state can be observed visually, and the endothermic and exothermic reactions of the sample must capture very subtle temperature changes. The thermocouple which is a temperature detection part is in direct contact, and a thermocouple system for heating measurement which can detect this extremely sensitively can be provided.

  Further, in claim 8, setting operations such as temperature rise, temperature drop, temperature maintenance, temperature recording, data recording and the like can be performed from the personal computer, and in claim 9, remote operation of the entire system can be performed by a personal computer connected by a communication cable. It is possible to provide a thermocouple system for heating measurement capable of directly observing the melting process and solidification process of the sample with a stereomicroscope and recording it together with the temperature while recording the measured / set temperature.

  An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of a heating measurement thermocouple system according to an embodiment of the present invention, FIG. 2 is a block configuration diagram of a heating measurement unit of the heating measurement thermocouple system, and FIG. It is a timing diagram which shows the heating measurement principle of the thermocouple system for an industrial use.

  In FIG. 1, a heating measurement unit 1 of the thermocouple system for heating measurement according to the present invention includes a setting operation unit 2 for setting operations such as various heating controls and temperature measurements, and a thermocouple 3 made of heat-resistant and corrosion-resistant, for example, R thermocouple. It is connected to the. The thermocouple 3 is mounted in an observation chamber 5 made of hard glass and equipped with a cooling means while being attached to a thermocouple holder 4, and holds a minute sample 6 to be observed. The observation chamber 5 is provided with an observation window through which the internal thermocouple 3 and the sample 6 can be observed. A stereomicroscope 7 for observing the state of the thermocouple 3 and the sample 6 is provided opposite to the observation window. It has been. In order to display and record the observation video through the stereomicroscope 7, a CCD camera 8, a telop device 9, a video system 10, and a display 11 are connected in order. Further, in order to control these and record data, a personal computer 12 is connected to the heating measurement unit 1, the telop device 9 and the video system 10, and a printer 13 is connected to the personal computer 12 for printing the recording.

  Next, in the setting operation unit 2, the temperature is raised (for example, three kinds of temperatures of 10 ° C./min, 100 ° C./min, 500 ° C./min are automatically raised according to a preset temperature rise gradient), and the temperature is lowered ( For example, 3 types of 10 ° C./min, 100 ° C./min, 500 ° C./min, temperature is automatically decreased according to a preset temperature decrease gradient), temperature maintenance, temperature recording (for example, 5 points), data recording (for example, start, Setting operations such as 2 points of completion) can be performed. Based on these settings, the heating measurement unit 1 holds the sample 6 in the observation chamber 5 by the thermocouple 3, measures the temperature while heating or cooling, and controls the PID temperature of the sample 6. Therefore, the thermocouple 3 is provided with a sample holding function, a heater function, and a temperature detection function.

  In addition, a predetermined portion of the sample 6 in the observation chamber 5 is magnified and observed in detail with the stereomicroscope 7, and the image is taken at a high speed with the CCD camera 8, and the sample 6 and temperature are monitored with the telop device 9. A predetermined telop is added, video data with a telop is recorded in the video system 10, and this video data can be observed on the display 11.

  The personal computer 12 controls the telop device 9 and the video system 10, and as a data recording system, captures temperature data such as video data and PID temperature control status, set temperature, and measured temperature of the heating measurement unit 1 as trend data, The observation record can be recorded and saved. Further, the personal computer 12 can print the observation record by the printer 13.

  As shown in FIG. 2, the heating measurement unit 1 includes a heating power source unit 23 that energizes and heats the thermocouple 3, a measurement unit 24 that measures the thermoelectromotive force of the thermocouple, and performs switching at a predetermined frequency. A heating measurement switching unit 22 that switches between the power supply unit 23 and the measurement unit 24, an A / D conversion unit 25 that digitally converts an analog temperature signal based on the thermoelectromotive force measured by the measurement unit 23, and the converted digital temperature signal. A control unit 21 comprising, for example, a microcomputer for controlling them, a D / A conversion unit 26 for converting the digital temperature signal of the control unit 21 into analog, a temperature adjustment unit 27 for adjusting the temperature by receiving the analog value, and a control unit 21 and a serial communication unit 28 to which the temperature adjustment unit 27 is connected.

  Hereinafter, the operation of the heating measurement unit 1 will be described. Based on the setting by the setting operation unit 2, the control unit 21 energizes the thermocouple 3 by the heating power supply unit 23 while alternately switching the heating power supply unit 23 and the measurement unit 24 by the heating measurement switching unit 22. Then, the analog temperature signal based on the thermoelectromotive force from the thermocouple 3 is digitally converted via the A / D conversion unit 25 during the next half cycle by the measuring unit 24 and received as temperature data to the personal computer 12. Control output. Subsequently, the digital temperature signal is analog-converted by the D / A conversion unit 26 from the control unit 21 and sent to the temperature adjustment unit 27. The temperature adjustment unit 27 calculates the set temperature by the setting operation unit 2 and the analog temperature signal. Temperature control and PID control. As described above, the control unit 21 can perform heating measurement control, data processing, and condition setting, and can send data to the personal computer 12.

  The heating measurement in the present invention uses 0-12 V variable direct current from the heating power supply unit 23 while the heating measurement switching unit 22 alternately switches the heating power supply unit 23 and the measurement unit 24 at the heating / measurement timing shown in FIG. Then, switching is performed at 300 Hz, and a voltage is applied to the thermocouple 3 with a half-cycle rectangular wave to heat the thermocouple 3 with a heating current. Next, the heating current flowing through the thermocouple 3 in the remaining half cycle is cut off by a rectifier (not shown), and the measuring unit 24 is connected to a temperature measuring circuit (not shown) by a high-speed relay to generate a temperature measurement signal at the temperature measurement timing. The thermoelectromotive force of the thermocouple is detected by a DC voltage measuring device (not shown).

  By using a rectangular wave for heating the thermocouple 3, the interface with the controller 21 is facilitated, and the circuit is simple. Further, there are the following two effects as the merit of digitizing the thermoelectromotive force signal by the A / D converter 25. 1. In the conventional hot thermocouple method, the thermoelectromotive force cannot be captured in the heating cycle, so a sag (voltage drop) occurs in the measurement voltage due to the measurement circuit time constant, and an error occurs in the direct reading value. Accurate measurement is possible by holding the measured value until the measurement cycle. 2. Digitization makes it easy to calibrate and guarantee the system by inputting a voltage corresponding to the thermoelectromotive force from the tip of the thermocouple holder without generating a heating output instead of the electromotive force generated by the thermocouple. (In the past, it was necessary to correct the measured value with a standard sample (NaCl), etc.)

  The heating measurement unit 1 measures the temperature of the changing sample 6 with the thermocouple 3 while giving the temperature change to the sample 6 to be observed with the thermocouple 3, and the temperature characteristics of the sample based on the temperature change are described above. If the thermal analysis is carried out by observing with the stereomicroscope 7 and taking in the data obtained by measurement and observation, the endothermic and exothermic reaction of the sample 6 that occurs during the process of automatic temperature rise, automatic temperature drop, or constant temperature heating Draws a unique curve on the trend recording data, which makes it possible to detect the thermal transformation point of the sample and to visually observe its state, and to absorb the endotherm of the sample 6, exothermic reaction, etc. However, in this method, the thermocouple 3 which is a temperature detection unit is in direct contact with the sample 6 and can be detected very sensitively.

  In the present embodiment, the setting operation unit 2 performs various setting operations. However, the setting operation unit 2 may not be provided, and the same setting operation may be performed by the personal computer 12. In addition, the heating measurement unit 1 and the personal computer 12 are connected by a communication cable, and the melting process and the solidification process of the sample 6 are directly observed with the stereo microscope 7 while the remote operation of the entire system and the measurement / setting temperature are recorded. It is good also as what can be recorded with it.

  It is a block diagram of the thermocouple system for heating measurement which concerns on one Embodiment of this invention.   It is a block block diagram of the heating measurement unit of the thermocouple system for heating measurement.   It is a timing diagram which shows the heating measurement principle of the thermocouple system for the heating measurement. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heating measurement unit 2 Setting operation part 3 Thermocouple 6 Sample 7 Stereomicroscope 8 CCD camera 9 Telop apparatus 10 Video system 11 Display 12 Personal computer 13 Printer 21 Control part 22 Heating measurement switching part 23 Heating power supply part 24 Measuring part 25 A / D Conversion unit 26 D / A conversion unit 27 Temperature control unit

Claims (9)

  The thermocouple holding the sample to be observed is switched at a predetermined frequency using variable direct current, and a voltage is applied to the thermocouple with a half-cycle rectangular wave to flow a heating current to heat the thermocouple and sample. The heating measurement unit that cuts off the heating current flowing in the thermocouple in the remaining half cycle, detects the thermoelectromotive force of the thermocouple with the temperature measurement signal at the temperature measurement timing, measures the temperature, and sets the sample to a predetermined observation temperature, For this heating measurement unit, automatic temperature increase that automatically increases temperature according to a preset temperature increase gradient, automatic temperature decrease that automatically decreases temperature according to a preset temperature decrease gradient, maintenance of a predetermined observation temperature, at a predetermined point Setting operation means that can perform setting operations such as temperature recording and data recording at the start and end, and to make it possible to easily and directly observe the melting state of the sample and the reaction between the melt and the solid at a predetermined observation temperature. Special Thermocouple System for heating measurement to.   A heating power supply unit that heats the thermocouple by energizing the thermocouple, a measurement unit that measures the thermoelectromotive force of the thermocouple, and a heating measurement switch that switches between the heating power supply unit and the measurement unit by switching at a predetermined frequency Unit, an A / D conversion unit that digitally converts an analog temperature signal based on the thermoelectromotive force measured by the measurement unit, a control unit that receives and controls the converted digital temperature signal, and a digital temperature signal of the control unit A D / A conversion unit that converts the analog value and a temperature adjustment unit that adjusts the temperature by receiving the analog value, and based on the setting by the setting operation unit, the control unit is a heating power supply unit in the heating measurement switching unit. While alternately switching the measurement unit, the heating power supply unit energizes the thermocouple with a half-cycle rectangular wave to heat it, and sends the analog thermoelectromotive force signal to the temperature from the thermocouple via the measurement unit The A / D converter converts the digital data, receives it as temperature data, and outputs it to a personal computer. The D / A converter analog converts the digital temperature data and sends it to the temperature controller. The temperature control unit can be set by the setting operation unit and the temperature data of this digital value is calculated to perform temperature adjustment and PID control, and the control unit can perform heating measurement control, data processing, and condition setting The thermocouple system for heating measurement according to claim 1.   The thermocouple system for heating measurement according to claim 1 or 2, further comprising a stereomicroscope for observing the state of the thermocouple and the sample.   The thermocouple system for heating measurement according to claim 3, wherein a CCD camera, a telop device, a video system, and a display are provided to display and record an observation image through the stereomicroscope.   The thermocouple system for heating measurement according to claim 1, 2, or 3, wherein a personal computer as a data recording system is connected to the heating measuring unit.   The thermocouple system for heating measurement according to claim 4, wherein the personal computer is connected to the telop device, video system and heating measurement unit in order to control the telop device, video system and heating measurement unit and to record data.   While measuring the temperature of the changing sample with a thermocouple while giving the temperature change to the sample to be observed with the thermocouple, observe the temperature characteristics of the sample based on the temperature change with the stereomicroscope, The thermocouple system for heating measurement according to claim 3, 4, 5, or 6, wherein the thermal analysis is performed by taking in data obtained by measurement and observation.   Automatic temperature rise that automatically raises the PC according to a preset temperature rise gradient, automatic temperature drop that automatically falls according to a preset temperature drop gradient, maintenance of a predetermined observation temperature, temperature recording and start at a predetermined point 8. The thermocouple system for heating measurement according to claim 5, 6 or 7, wherein the setting operation means is capable of performing a setting operation such as data recording at the time of termination.   Connect the heating measurement unit to a personal computer with a communication cable, and directly observe the melting and solidification process of the sample with a stereomicroscope while remotely operating the entire system and recording the measured / set temperature with this personal computer. The thermocouple system for heating measurement according to claim 8, which can be recorded together.

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