wtw pH 3110 Operating Manual page 46

Lists
Measured value
Molality
ORP voltage
pH value
Potentiometry
Reset
Resolution
Slope
Standard solution
Test sample
Zero point
46
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 is the quantity (in Mol) of a dissolved substance in 1000 g
solvent.
The ORP is caused by oxidizing or reducing substances dissolved in
water, if these substances become effective at an electrode surface
(e. g. a gold or platinum surface).
The pH is a measure of the acidic or basic effect of an aqueous
solution. It corresponds to the negative decadic logarithm of the molal
hydrogen ions activity divided by the unit of the molality. The practical
pH value is the value of a pH measurement.
Name of a measuring technique. The signal (depending on the
measured parameter) of the electrode is the electrical potential. The
electrical current remains constant.
Restoring the original condition of all settings of a measuring system.
Smallest difference between two measured values that can be
displayed by a measuring instrument.
The slope of a linear calibration function.
The standard solution is a solution where the measured value is
known by definition. It is used to calibrate a measuring system.
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.
The zero point of a pH electrode is the pH value at which the
electromotive force of the pH electrode at a specified temperature is
zero. Normally, this is at 25 °C.
pH 3110
ba75791e02 11/2008