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Operational Guide
62
Salinity Measurements (Not Available In Basic Mode)
Press the RANGE key twice to switch from conductivity to the configured
Salinity scale.
Verify the desired scale is configured in SETUP. The meter supports three
salinity scales: Practical Scale 1978, Percent Scale %, and Natural Sea Water
1966, [g/L]. (Information on the 3 scales follows)
Note
: These are for determining salinity as they relate to general
oceanographic use. Practical salinity and the Natural Seawater require a
conductivity calibration. % NaCl requires a calibration in HI 70371 standard.
PSU - Practical Salinity Scale
The practical salinity (S) of seawater relates the ratio of electrical conductivity
of a normal seawater sample at 15 ºC and 1 atmosphere to a potassium chloride
solution (KCl) with a mass of 32.4356 g/Kg water at the same temperature
and pressure.
Under these conditions the ratio is equal to 1, and S=35. The practical salinity
scale may be applied to values through 42 PSU at temperature between -2 to
35 ºC.
According to the definition, salinity of a sample in PSU (practical salinity units)
is calculated using the following formula:
Salinity
Measurements
Summary of Contents for Edge
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