Xylem Oxi 1970i PORTABLE DISSOLVED OXYGEN METERS - Manual (Page 62)

Lists Oxi 1970i
62
Salinity The absolute salinity S
A
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 is used for oceanographic monitoring. It is deter-
mined by measuring the electrical conductivity.
Salt content General designation for the quantity of salt dissolved in water.
Sample Designation of the sample ready to be measured. Normally, a test
sample is made by processing the original sample. The test sample
and original sample are identical if the test sample was not processed.
Slope The slope of a linear calibration function.
Slope (relative) Designation used by WTW in the D. O. measuring technique. It ex-
presses the relationship of the slope value to the value of a theoretical
reference sensor of the same type of construction.
Standard solution The standard solution is a solution where the measured value is
known by definition. It is used to calibrate a measuring system.