wtw inoLab 740, Operating Manual

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Lists
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Blank value solution Blank value solutions are used to determine the blank
value. Blank value solutions are obtained when samples
of the dilution water are mixed with nitrification inhibitors
and subjected to the same treatment as the sample
dilutions. The blank value is determined from the
measurement of the oxygen content of the blank value
solutions before and after the incubation period.
BOD
n
Abbreviation for the biochemical oxygen demand of a
water sample after an incubation period of n days.
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).
Cell constant, k Characteristic quantity of a conductivity measuring cell,
depending on the geometry.
Conductivity Short form of the expression, specific electrical
conductivity. It is a measured value of the ability of a
substance to conduct an electric current. In water
analysis, the electrical conductivity is a dimension for the
ionized substances in a solution.
Conductometry Name of the conductivity measuring technique.
Diaphragm The junction is a porous body in the housing wall of
reference electrodes or electrolyte bridges. It forms the
electrical contact between two solutions and makes
electrolyte exchange more difficult. The expression,
junction, is also used for ground or junction-less
transitions.