In-Situ TROLL 9500 Operators Manual - Manual (Page 62)

55 TROLL 9500 Operator’s Manual 0095110 rev. 007 01/09
ROLE OF THE SENSOR IN CALIBRATION
The temperature sensor has a primary function during calibration of
temperature-dependent water-quality parameters such as conductiv-
ity. When the calibration temperature is known, temperature compen-
sation can be provided during measurement of water-quality param-
eters. The temperature sensor also provides continuously updated
real-time measurements of solution temperature when profiling.
Ensure that the temperature sensor is immersed in at least one-half
inch of solution during calibration of all parameters. The fill line on the
Cal Cup serves as a guide to the recommended quantity of calibration
solution.
For best results, the water-quality sensors should be calibrated at the
same temperature that will be encountered in the field.
SOFTWARE FUNCTIONS
Conversion of resistance (measured by the PRT) to temperature is
automatic in the software. No user calibration is required.
The temperature channel is automatically included in tests so that
solution temperature is available to compensate water-quality data
from other channels.
Units
4EMPERATURE
TIP: To change unit preferences: In Win-Situ, select
Preferences on the Options menu. In Pocket-Situ, select the
Home site, then tap Setup in the command bar.
REFERENCES
Eaton, 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 Associa-
tion, American Water Works Association, and Water Environment
Federation, 2005. Section 2550, Temperature.
EPA, Methods for Chemical Analysis of Water and Wastes,
EPA/600/4-79-020, revised March 1983. Method 170.1, Tempera-
ture, 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 initially
funded by the National Science Foundation. On the web at wow.
nrri.umn.edu.
SECTION 8: MONITORING TEMPERATURE