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| Titel |
Does temperature affect the accuracy of vented pressure transducer in fine-scale water level measurement? |
| VerfasserIn |
Z. Liu, C. W. Higgins |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
2193-0856
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| Digitales Dokument |
URL |
| Erschienen |
In: Geoscientific Instrumentation, Methods and Data Systems ; 4, no. 1 ; Nr. 4, no. 1 (2015-03-03), S.65-73 |
| Datensatznummer |
250115234
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| Publikation (Nr.) |
 copernicus.org/gi-4-65-2015.pdf |
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| Zusammenfassung |
| Submersible pressure transducers have been utilized for collecting water
level data since the early 1960s. Together with a digital data logger, it is
a convenient way to record water level fluctuations for long-term monitoring.
Despite the wide use of pressure transducers for water level monitoring,
little has been reported regarding their accuracy and performance under field
conditions. The effects of temperature fluctuations on the output of vented
pressure transducers were considered in this study. The pressure transducers
were tested under both laboratory and field conditions. The results of this
study indicate that temperature fluctuation has a strong effect on the
transducer output. Rapid changes in temperature introduce noise and
fluctuations in the water level readings under a constant hydraulic head
while the absolute temperature is also related to sensor errors. The former
is attributed to venting and the latter is attributed to temperature
compensation effects in the strain gauges. Individual pressure transducers
responded differently to the thermal fluctuations in the same testing
environment. In the field of surface hydrology, especially when monitoring
fine-scale water level fluctuations, ignoring or failing to compensate for
the temperature effect can introduce considerable error into pressure
transducer readings. It is recommended that a performance test for the
pressure transducer is conducted before field deployment. |
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