wtw Ox i340i, Руководство по эксплуатации

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Oxi 330i/340i Lists
57 ba52306e04 03/2008
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 WTW 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
®
WTW 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.