Xylem WTW pH/Cond 3320, Руководство по эксплуатации

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pH/Cond 3320 Glossary
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General information
Salt content General designation for the quantity of salt dissolved in water.
Temperature coeffi-
cient
Value of the slope of a linear temperature function.
Temperature compen-
sation
Name of a function that considers the temperature influence on the
measurement and converts it accordingly. Depending on the measured
parameter to be determined, the temperature compensation functions
in different ways. For conductimetric measurements, the measured
value is converted to a defined reference temperature. For potentiomet-
ric measurements, the slope value is adjusted to the temperature of the
test sample but the measured value is not converted.
Resistance Short name for the specific electrolytic resistance. It corresponds to the
reciprocal value of the electrical conductivity.
Cell constant C Characteristic quantity of a conductivity measuring cell, depending on
the geometry.
α
T
Ref
=
Meas
*
1
1 +
a
(T - )
*
T
Ref
Resolution Smallest difference between two measured values that can be dis-
played by a meter.
AutoRange Name of the automatic selection of the measuring range.
Adjusting To manipulate a measuring system so that the relevant value (e.g. the
displayed value) differs as little as possible from the correct value or a
value that is regarded as correct, or that the difference remains within
the tolerance.
Calibration Comparing the value from a measuring system (e.g. the displayed
value) to the correct value or a value that is regarded as correct. Often,
this expression is also used when the measuring system is adjusted at
the same time (see adjusting).
Channel A channel is a display indication that corresponds to a physical connec-
tion on the meter.
Measured variable The measured parameter is the physical dimension determined by
measuring, e.g. pH, conductivity or D.O. concentration.
Test sample Designation of the test 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.
Measured value The measured value is the special value of a measured parameter to be
determined. It is given as a combination of the numerical value and unit
(e.g. 3 m; 0.5 s; 5.2 A; 373.15 K).
Molality Molality is the quantity (in Mol) of a dissolved substance in 1000 g sol-
vent.
Reset Restoring the original condition of all settings of a measuring system.