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Yohandri
Department Of Physics, Universitas Negeri Padang
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Journal : Sainstek

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Sistem Pengontrolan Temperatur ON-OFF Menggunakan Mikrokontroler AT89C51 dengan Pengindera Termokopel Syufrawardi, Syufrawardi; Yohandri, Yohandri; Asrizal, Asrizal
Sainstek Vol 11, No 1 (2008): Vol. XI No. 1, September 2008
Publisher : Lembaga Penelitian Universitas Negeri Padang

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Abstract

Temperature control system was an important instrument to control temperature of an object at setpoint temperature and many applications in human life. Investigation of control system was required to get high quality of system. Purposes of this research was: to investigate relation between output voltage of sensor and signal processing circuits with temperature, to determine number that presented at digital display as function of temperature, and to determine accuracy and precision of temperature control system. The research can be classified into laboratory experimental research. Data collecting technique that used in this research was direct measurement. Variables that measured temperature, output voltage of sensor, and output voltage of amplifier circuits, while gradient of straight line and static characteristics were measured indirectly. The data that  founded of measurement result was analyzed  by using graph and error analysis. Graph analysis was used to determine measurement error, accuracy, and precision of control system. There were four main results of this research as follow: 1). Output voltage of sensor  increase directly proportional with temperature and sensitivity of sensor was 0,042 Volt/oC, 2). Output voltage of differential and non inverting amplifier  also directly proportional with temperature, each of  it’s gradient was 0,0091 Volt/oC and 0,0248 V/oC, 3). The number that displayed at seven segment before linearization process directly proportional with temperature and after processing the number at digital display was suitable with temperature that measured by standard digital thermometer, and 4). The average of accuracy and precision of temperature control system by using microcontroller with thermocouple  sensing was high, each of it was 0,9967 and 0,997 in order of least significant scale was 1 oC. Key words : Control system, thermocouple, microcontroller, sensitivity, accuracy, precision.
Co-Authors - Asrizal - Asrizal - Asrizal, - - Yulkifli - Yulkifli Abdul Razak Adibil Mahdi Rahmad Hidayat Ahmad Fauzi Al Khudri Sembiring Alex Sandryadi Alfindri Zulkarnaini Ali Amran Alvissda Damai Ananda Putra Angela Widiya Pratama Angga Saputra Anggraini Anggraini Apriani Sijabat Arif Farma Putra Asrizal Asrizal Asrizal Aulia Asman Auliya Sifa Fauziyyah Bastian Wahyudi Cahyati, Mona Trisna Citra Syefriana Deski Beri Desnita Dewi Puspa Sari Dewi Puspa Sari, Dewi Puspa Diliarosta, S. Dinata, Marta Djusmaini Djamas Elfiana Lathifa Rahma Emafri, Wenda Erin Ficrah Huda Even Triaga Fanny Rahmatina Rahim Farah Sarjani Farah Sarjani Farhan El Maulid Fauzan Al Haqqi Festiyed Festiyed Festiyed Fitra Maryulis Fitri Afriani Fitri Arsih Fitri Arsih Fuja Novitra Gusnedi Gusnedi Gusnedi, - Hamdi Rifai Hanifa Yoanda Hardeli Hardeli Hary Sanjaya Hary Sanjaya Hary Sanjaya Hary Sanjaya Heri -Maryono Heron Tarigan Hufri Hufri Ilham Alimuddin Ilham Hafidzh Wijaya Inandita Mardhiyah Indang Dewata Irena Retno Damayanti Irfan Muhammad Zaqi Irfandi Irfandi Josaphat Tetuko Sri Sumantyo Joshapat T. Sri Sumantyo Khairat, Raudhatul Khairunnisa Khairunnisa Komaini, Anton Kurnia Ashadi Laila Suryani Lily Handayani Linda Winiasri Maisa Fitri Marlince NK Nababan Marlince NK Nababan Minda Azhar Minda Azhar Mirza Muhammad Waqar Mitri Selisne Moulia Fadhilah Muhammad Gani Ariski Muhammad Irsyad Muhammad Rahfiqa Zainal Naurah Nazhifah Nilam Nilam Nofi Yendri Sudiar Nur Anisa Sati’at Nurhafizah Nurhafizah Nurhasanah Nurhasanah Nurhasnah, Nurhasnah Nurul Ihsan Palma Juanta Palma Juanta Puti Aulia Mardiah Putra, Ananda Putri Ayu Putri Yuliana Mahardika Putri, Yosa Aulya Rahadian Zainul Rahma Sari Rahma, Mila Devita Rahmat Dito Tri Wicaksono Rahmatul Fitria Rahmi Sukmawati Ramli Ramli Ramli Ramli Ramli, - Raudhah Awal Ridho Pratama Rikizaputra Rikizaputra Rio Anshari Risa Noviarti Robby Zeffry Robika Alkadri Roza, Media S. Solheri Sari, Yulis Septianas Selisne, Mitri Siltri, Dina Mulya Silvi Yulia Sari Siregar, A. M. Siti Aisyah Suci Ramadhani Sudarma, T. F. Surahman, D. Syafriani Syafriani Syufrawardi Syufrawardi Tomi Apra Santosa Ulfa Fadhilah Ulianas, Alizar Umar Kalmar Nizar Usmeldi Usmeldi Venezia Ferly Wiranda Viskia Manelza Vivi Wulandari Vivi Wulandari Wahyuni Satria Dewi Wahyunita Wulandari Wandika Wenda Emafri winni suhadi Yenni Darvina Yohanna Dasriyani Yohanna Dasriyani Yosi Dwi Anggreni Yulhendri Yulhendri Yulis Septianas Sari Yulkifli Yulkifli Yulkifli Yulkifli Yulkifli Yulkifli Yulkifli Yulkifli Yulkifli YUNALDI YUNALDI Yurnetti Yurnetti Zulhendri Kamus Zulpadrianto Z Zulyusri Zulyusri Zurian Affandi