Manual

handylab LF 11 Lists

ba75365e04 01/2011

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 with-

in the tolerance.

AutoRange Name of the automatic selection of the measuring range.

AutoRead Name for a function to check the stability of the measured value.

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. Of-

ten, this expression is also used when the measuring system is adjust-

ed 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 cur-

rent. In water analysis, the electrical conductivity is a dimension for the

ionized substances in a solution.

Conductometry Name of the conductivity measuring technique.

Measured parameter The measured parameter is the physical dimension determined by

measuring, e. g. pH, conductivity or D. O. concentration.

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).

Measuring system The measuring system comprises all the devices used for measuring,

e. g. measuring instrument and probe. In addition, there is the cable

and possibly an amplifier, terminal strip and armature.

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

vent.

Reference

temperature

Fixed temperature value to compare temperature-dependent mea-

sured 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 specific electrolytic resistance. It corresponds to

the reciprocal value of the electrical conductivity.

Resolution Smallest difference between two measured values that can be dis-

played by a measuring instrument.

Slope The slope of a linear calibration function.