A calibration procedure for load cells to improve accuracy of mini-lysimeters in monitoring evapotranspiration
Article
Article Title | A calibration procedure for load cells to improve accuracy of mini-lysimeters in monitoring evapotranspiration |
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ERA Journal ID | 1949 |
Article Category | Article |
Authors | Misra, R. K. (Author), Padhi, J. (Author) and Payero, J. O. (Author) |
Journal Title | Journal of Hydrology |
Journal Citation | 406 (1-2), pp. 113-118 |
Number of Pages | 6 |
Year | 2011 |
Publisher | Elsevier |
Place of Publication | Amsterdam, Netherlands |
ISSN | 0022-1694 |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.jhydrol.2011.06.009 |
Web Address (URL) | http://www.elsevier.com/locate/jhydrol |
Abstract | We used twelve load cells (20 kg capacity) in a mini-lysimeter system to measure evapotranspiration simultaneously from twelve plants growing in separate pots in a glasshouse. A data logger combined with a multiplexer was used to connect all load cells with the full-bridge excitation mode to acquire load-cell signal. Each load cell was calibrated using fixed load within the range of 0-0.8 times the full load capacity of load cells. Performance of all load cells was assessed on the basis of signal settling time, excitation compensation, hysteresis and temperature. Final calibration of load cells included statistical consideration of these effects to allow prediction of lysimeter weights and evapotranspiration over short-time intervals for improved accuracy and sustained performance. Analysis of the costs for the mini-lysimeter system indicates that evapotranspiration can be measured economically at a reasonable accuracy and sufficient resolution with robust method of load-cell calibration. |
Keywords | crops; evaportranspiration; ET; irrigation; load cell; lysimeter |
ANZSRC Field of Research 2020 | 490102. Biological mathematics |
510501. Biological physics | |
300101. Agricultural biotechnology diagnostics (incl. biosensors) | |
Public Notes | File reproduced in accordance with the copyright policy of the publisher/author. |
Byline Affiliations | Australian Centre for Sustainable Catchments |
National Centre for Engineering in Agriculture | |
Department of Agriculture and Fisheries, Queensland | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q0x4q/a-calibration-procedure-for-load-cells-to-improve-accuracy-of-mini-lysimeters-in-monitoring-evapotranspiration
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