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Title: The evaluation of Grant/YSU 3800 water quality monitor
Author: A.J. Chappell
Document Type: Monograph
This report describes the tests carried out to establish the reliability of data produced by a Grant\YSI 3800. Tests have been carried out on a single instrument taken new from those supplied to Thames Region for field use. The Grant\YSI 3800 meter is a multi-parameter instrument used for field monitoring of water quality. It has six sensors to measure temperature, dissolved oxygen (%) , pH, conductivity, turbidity, and ammonium. From this data values for dissolved oxygen (mg/1), ammonia, and salinity are derived. The tests completed and reported here studied the effect of water flow rate, water temperature, water salinity, and instrument drift in one month. The tests were carried out on all instrument parameters in natural water taken from the river Kennet at the NRA National Evaluation Centre at Fobney Mead, and in the Thames Estuary. The instrument output was compared to analysis by the NAMAS accredited laboratory at Fobney Mead. The tests were carried out over four months to the end of November 1993 to a test protocol agreed by Grant\YSI and the NRA. Further tests are being made on an instrument with a different ammonium probe after recent developments by Grant\YSI.
Publisher: National Rivers Authority
Publication Date: 1993
Publication Place: Reading
Subject Keywords: Water samplingPollutant loadWater qualityTesting
Geographic Keywords: Thames
Extent: 25
Total file downloads: 279

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