Owner manual

Lists Lab 970

ba75558e03 11/2009

Glossary

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.

AutoRange Name of the automatic selection of the measuring range.

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 corresponds to the reciprocal value of the resistivity.

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.

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).

Measured variable The measured parameter is the physical dimension determined by

measuring, e. g. pH, conductivity or DO concentration.

Molality Molality is the quantity (in Mol) of a dissolved substance in 1000 g

solvent.

Reference

temperature

Fixed temperature value to compare temperature-dependent

measured values. For conductivity measurements, the measured

value is converted to a conductivity value at a reference temperature

of 20 °C or 25 °C.

Reset Restoring the original condition of all settings of a measuring system.

Resistance Short name for the electrolytic resistivity. It corresponds to the

reciprocal value of the electrical conductivity.

Resolution Smallest difference between two measured values that can be

displayed by a measuring instrument.

Salinity The absolute salinity S

of seawater corresponds to the relationship

of the mass of dissolved salts to the mass of the solution (in g/Kg). In

practice, this dimension cannot be measured directly. Therefore, the

practical salinity according to IOT is used for oceanographic

monitoring. It is determined by measuring the electrical conductivity.

Salt content General designation for the quantity of salt dissolved in water.

Stability control Function to control the measured value stability.