Rancang Bangun Sistem Pengukuran Resistivitas Geolistrik dengan menggunakan Sumber Arus Konstan

Bachtera Indarto, Gusti RE Sudenasahag, Didiek B Rahmad, M Hasan Basri, Hasto SUnarno

Abstract


Rancang bangun sistem pengukuran resistivitas geolistrik dengan menggunakan sumber arus konstan telah berhasil dibuat dan dianalisis. Sistem pengukuran resistivitas geolistrik terdiri atas rangkaian konverter boost, sumber arus konstan, dan mikrokontroler sebagai sistem kendali proses pengukuran dan akuisisi data resistivitas geolistrik berupa data resistansi. Sistem akuisisi data menggunakan prinsip hukum Ohm, dengan metode geolistrik Wenner. Sumber arus konstan yang berhasil diimplementasikan pada sistem resistivitas geolistrik yakni arus sebesar 0,1 mA bekerja pada resistansi 0,4  sampai 2,345 M  dan arus 1mA bekerja pada resistansi 0,4  hingga 8,53 k . Serta pada pengukuran resistansi dapat terukur dengan baik pada pengukuran resistasi 33 hingga 470 k.

Abstract


Design of geoelectric resistivity measurement system using a constant current source has been successfully created and analyzed. Geoelectric resistivity measurement system consists of a boost converter circuit, constant current source, and a microcontroller as the control system in the process of measurement and data acquisition resistivity geoelectric form of resistance data. Data acquisition system using the principles of Ohm’s law, the geoelectric method of Wenner. In this study, a constant current source that is successfully implemented on geoelectric resistivity that is a current of 0,1 mA work on resistance 0,4  until 2,345 M and a current of 1mA
is working on 0,4  resistance to 8,53 k. As well as the resistance measurement can be measured by either the resistance measurement 33
 to 470 k.


Keywords


Boost konverter, geolistrik-resistivitas, mikrokontroler, sumber arus

Full Text:

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References


S.H. Ward, Resistivity and induced polarization methods, in Geotechnical and Environmental Geophysics (Vol. 1, S.H. Ward (ed.) , Soc. of Expl. Geophys, 1990).

H. Grandis, Diktat Kuliah Geo-Elektromagnet (Departemen Geofisika, FIKTM, Institut Teknologi Bandung, Bandung, 2006).

L. Hendrajaya, dan A. Idam, Geolistrik Tahanan Jenis (Laboratorium Fisika Bumi, Jurusan Fisika FMIPA ITB, 1990).

J. Milsom, Field Geophysics, The Geological Field Guide Series (3rd Edition, John Wiley & Sons, West Sussex, 2003)

J.W. Nilson, and S.A. Riedel, Electric Circuits (Eighth Edition, New Jerscy: Pearson Education Inc., 2008).

L.T. Harrison, Current Sources and Voltage References: A Design Reference for Electronics Engineers (Newnes, 2005)




DOI: http://dx.doi.org/10.12962%2Fj24604682.v12i2.1336

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