Abstract
This paper presents the development of an inexpensive and portable microcontroller based instrument set up to measure the electrical conductivity of the soil samples and hence to determine the Chloride concentration using empirical relation between the two parameters. A dedicated ATmega32 microcontroller and its associated peripherals are employed to measure electrical conductivity and temperature. A special feature of the designed instrument is that the conductivity temperature compensation can be achieved by software or the user can maintain the sample at desired temperatures by using the temperature controller. An empirical relationship between Chloride concentration and electrical conductivity of soil samples has been developed using Linear Regression Model, which gave a Correlation Coefficient of R = 0.95 (n = 20), Slope = 14.95, and Intercept = −563.9. The obtained results are compared with the ELICO CM 180 conductivity meter to check the accuracy of the designed instrument, which gives a correlation coefficient of R = 0.98 (n = 20).
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References
Ferrara, E., Callegaro, L., and Durbiano, F., Optimal Frequency Range for the Measurement of AC Conductivity in Aqueous Solutions, Proc. 17th IEEE Instrumentation and Measurement Technology Conference, Baltimore, 2000.
Li, X. and Meijer, G.C.M., A Low-Cost and Accurate Interface for Conductivity Sensors, Proc. 19th IEEE Instrumentation and Measurement Technology Conference, Anchorage, AK, USA, 2002.
Rajendran, A. and Neelamegam, P., Measurement, 2004, vol. 35, p. 59.
Abyaneh, H.Z., Nazemi, A.H., Neyshabori, M.R., et al., Tarim Bilimleri Dergisi, 2005, vol. 11, no. 1, p. 110.
Hajrasuliha, S., Cassel, D.K., and Rezainejad, Y., Geoderma, 1991, vol. 49, p. 117.
Braunstein, J. and Robbins, G.D., J. of Chemical Education, 1981, vol. 48, no. 1, p. 52.
Sensors. A Comprehensive Survey, Chemical and Biochemical Sensors, Gopel, W., Hesse, J., and Zemel, J.N., Eds., part I, vol. 2, Weinheim: VCH, 1991.
ATmega32 Microcontroller data sheet [www.atmel.com].
Recommended Chemical Soil Test Procedures for the North Central Region. North Central Regional Publication, no. 221, NDSVBull., 1988, no. 499.
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Neelamegam, P., Vasumathi, R. ATMEGA32 microcontroller based conductivity measurement system for chloride estimation of soil samples. Instrum Exp Tech 53, 591–595 (2010). https://doi.org/10.1134/S0020441210040214
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DOI: https://doi.org/10.1134/S0020441210040214