Lists
inoLab pH/ION 735
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Offset potential
The measurable potential of a symmetrical electrode, the membrane
of which is immersed in a solution with the pH of the nominal electrode
zero point. The asymmetry is part of the offset potential.
ORP voltage
The ORP is caused by oxidizing or reducing substances dissolved in
water if these substances become effective on an electrode surface
(e. g. a gold or platinum surface).
pH value
The pH is a measure of the acidic or basic effect of an aqueous solu-
tion. It corresponds to the negative decadic logarithm of the molal hy-
drogen ions activity divided by the unit of the molality. The practical pH
value is the value of a pH measurement.
Potentiometry
Name of a measuring technique. The signal (depending on the mea-
sured parameter) of the electrode is the electrical potential. The elec-
trical current remains constant.
Reset
Restoring the original condition of all settings of a measuring system.
Resolution
Smallest difference between two measured values that can be dis-
played by a meter.
Slope
The slope of a linear calibration function.
Slope (relative)
Designation used by WTW in the DO measuring technique. It ex-
presses the relationship of the slope value to the value of a theoretical
reference sensor of the same type of construction.
Standard solution
The standard solution is a solution where the measured value is
known by definition. It is used to calibrate a measuring system.
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 conductimetric 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 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.
