Instruction Manual

handylab Ox 12 Lists

ba75369e04 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.

Amperometry Name of a measuring technique. The signal (depending on the mea-

sured parameter) of the probe is the electric current. The electrical

voltage remains constant.

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).

D. O. partial pressure Pressure caused by the oxygen in a gas mixture or liquid.

D. O. saturation Short name for the relative D. O. saturation.

Note: The D. O. saturation value of air-saturated water and the D. O.

saturation value of oxygen-saturated water are different.

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.

OxiCal

Name for a procedure to calibrate D. O. measuring systems in water

vapor saturated air.

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 measuring instrument.

Slope The slope of a linear calibration function.

Slope (relative) Designation used in the D. O. measuring technique. It expresses the

relationship of the slope value to the value of a theoretical reference

probe of the same type of construction.