International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 10 Issue: 06 | Jun 2023
p-ISSN: 2395-0072
www.irjet.net
Design of Temperature Data Logger Using Thermocouple Wahyudi1, Raditya Naufal Fathoni 2, Imam Santoso3 1,2,3 Department of Electrical Engineering, Diponegoro University, Semarang, Indonesia
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Abstract -There are various ideas emerge to help human
file which can be opened using the spreadsheet Microsoft Excel.
works, one of them is a modern computer-based recording device with a soft file as the result, which can be opened using a computer to replace the conventional one. This paper delivers a temperature recording method by a type-K thermocouple using a data logger prototype. The tools and materials that are being used are a type-K thermocouple, a MAX6675 module, an Arduino Uno board, and an Arduino Data Logger Shield. The system was being tested with creating a folder, a subfolder, and a file on SD Card. The recording result will be a .csv type file that can be opened using a spreadsheet like Microsoft Excel. In the end, type-K thermocouple and MAX6675 module are able to read and send the input data to Arduino Uno, and the proposed data logging system is able to process and save the data from the sensor as a whole, and the recording file can be opened on a computer, with a folder, a subfolder, and a file using the intended format.
2. METHODOLOGY 2.1 Tools and Material Thermocouple temperature sensor is a thermoelectric temperature sensor that consist of two different metal wires (ex. chromel and constantan) that is being connected onthe probe tipand the reference junction. Fig -1 shows thermocouple cross-section [10].
Key Words: Data logger, Type-K Thermocouple, Arduino Uno, MAX6675, SD Card
1.INTRODUCTION In this modern era, conventional recording method (writing on a sheet of paper) is rarely used anymore. Various ideas have been introduced to make a modern and up to date, one of them is a recording method that is computer-based with a soft file as a result which can be opened using a computer. Information on temperature measurement results of a process can be done [1–3] by monitoring and data logger [4– 6]. Because of that, an idea comes to make an automatic temperature recording device that relies on microprocessor and SD Card as the data storage. The proposed temperature recording device uses an Arduino UNO board that is connected with a type-K thermocouple, a temperature sensor, and an SD Card to save the processed data by the system. Several methods used for calculating temperature measurements have been proposed [7-8] and error correction calculations have been carried out [9].
Fig -1: Thermocouple cross-section. In the core, thermocouple consists of a pair of hot and cold transducer which is connected and melted together, where the difference on this junction will be compared with the reference junction. The thermocouples with the type E, J, K dan T are metal-based thermocouple and can be used to measure temperature up to 1000°C (1832°F). Type S, R, and B thermocouples are noble-metal thermocouples and can be used to measure temperature up to 2000°C (3632°F). MAX6675 module is a tool that compensates the coldjunction and digitalize the signal from type-K thermocouple, can be called as a signal amplifier. The output data will have a 12-bit resolution, SPITM-compatible, andread-only format [11].
This paper proposed system uses data logging principle, where the data collecting, processing, and recording is being done in a device that is not connected to a computer and has own data storage system.
This converter has the measuring resolution of0,25oC, enables measuring up to +1024oC, and has the 8LSB thermocouple accuracy for measurement from 0oC to +700oC. Fig -2 shows pin configuration of MAX6675 module [11]. Arduino Unois microcontroller-based board, using an ATmega328 which has 14 digital input/output pins (where 6 pinscan be used as PWM output), 6 analog input pins, 16MHz oscillator crystal, type B USB jack, DC voltage input jack, and a reset button.
This paper provides a temperature recording method by type-K thermocouple sensor using an automatic temperature recording device. The recording system result will be a .csv
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