TROLL 9500 Operator's Manual - Geotech Environmental Equipment

Section 8: Monitoring TemperatureRole of the Sensor in CalibrationThe temperature sensor has a primary function during calibration oftemperature-dependent water-quality parameters such as conductivity.When the calibration temperature is known, temperature compensationcan be provided during measurement of water-quality parameters.The temperature sensor also provides continuously updatedreal-time measurements of solution temperature when profiling.Ensure that the temperature sensor is immersed in at least one-halfinch of solution during calibration of all parameters. The fill line on theCal Cup serves as a guide to the recommended quantity of calibrationsolution.For best results, the water-quality sensors should be calibrated at thesame temperature that will be encountered in the field.Software FunctionsConversion of resistance (measured by the PRT) to temperature isautomatic in the software. No user calibration is required.ReferencesEaton, A.D., L.S. Clesceri, E.W. Rice, and A.E. Greenberg, eds.,Standard Methods for the Examination of Water and Wastewater,21st edition, Washington, D.C.: American Public Health Association,American Water Works Association, and Water EnvironmentFederation, 2005. Section 2550, Temperature.EPA, Methods for Chemical Analysis of Water and Wastes,EPA/600/4-79-020, revised March 1983. Method 170.1, Temperature,Thermometric. Approved at 40 CFR Part 136.Mangum, B.W., and G.T. Furukawa, Guidelines for Realizing the ITS-90, NIST Technical Note 1265, U.S. Department of Commerce,1990.Water on the Web (WOW). University of Minnesota project initiallyfunded by the National Science Foundation. On the web at wow.nrri.umn.edu.The temperature channel is automatically included in tests so thatsolution temperature is available to compensate water-quality datafrom other channels.UnitsTemperature may be displayed in degrees Celsius (°C) or degreesFahrenheit (°F).TIP: To change unit preferences: In Win-Situ, selectPreferences on the Options menu. In Pocket-Situ, select theHome site, then tap Setup in the command bar.TROLL 9500 Operator’s Manual 550095110 rev. 007 01/09