wtw inoLab pH/Cond Level 1 Operating Manual page 67

Lists
Drift control See A R .
UTO EAD
®
MultiCal Group term for the various WTW pH calibration procedures
used for automatic calibration in buffer solutions.
Redox voltage Potentiometric quantity.
Reference In order to compare values measured at different tempera-
temperature tures, the values have to be converted to a fixed tempera-
ture. This temperature is 25 °C, or, as an exception, 20 °C.
Resistance All substances (solids, liquids, or gases) with mobile charge
carriers like for example electrons or ions have a finite ohmic
resistance, which means they have an electric conductance
that can be measured or an electric conducitivtiy.
Resolution Number of decimal places that appear for a measured val-
ue.
Salinity The salinity is a sum parameter especially for seawater;
it gives the salt content of a solution (without dimension) in
‰
.
Slope Specifies the voltage change per pH unit.
Temperature The temperature has a very strong impact on the electrical
compensation (TC) conductivity. To be able to compare measured values, it is
necessary to temper or convert the test sample to a refe-
rence temperature.
Test sample The substance to be measured. It can be liquid or solid.
Test solution Stable solution with a precisely known Redox voltage.
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