Xylem handylab LF 11 - Manual (Page 40)

Lists handylab LF 11
40 ba75365e04 01/2011
Standard solution The standard solution is a solution where the measured value is
known by definition. It is used to calibrate a measuring system.
TDS Total dissolved solids
TDS factor In conductometric measurements, the measuring instrument calcu-
lates the total dissolved solids (TDS) from the electric conductivity of
the test sample. For the calculation, a simple multiplication factor be-
tween 0.4 and 1.0 suffices. The exact factor depends on the quality of
the water to be examined and has to be determined for each water
type.
Temperature
coefficient
Value of the slope of a linear temperature function.
Temperature
compensation
Name of a function that considers the temperature influence on the
measurement and converts it accordingly. Depending on the mea-
sured parameter to be determined, the temperature compensation
functions in different ways. For conductometric measurements, the
measured value is converted to a defined reference temperature. For
potentiometric measurements, the slope value is adjusted to the tem-
perature of the test sample but the measured value is not converted.
Temperature function Name of a mathematical function expressing the temperature behav-
ior of a test sample, a probe or part of a probe.
Test sample Designation of the sample ready to be measured. Normally, a test
sample is made by processing the original sample. The test sample
and original sample are identical if the test sample was not processed.