Hanna-instruments HI 4321 Manual do Utilizador descarregar pdf (Página 49)

PRACTICAL SALINITY SCALE (UNESCO 1978)PRACTICAL SALINITY SCALE (UNESCO 1978)

PRACTICAL SALINITY SCALE (UNESCO 1978)

According to the definition, salinity of a sample in psu (practical salinity units) is calculated using the

following formula:

where:

- coefficient;

(sample) - uncompensated conductivity at T °C;

C(35,15)= 42914 µS/cm - the corresponding conductivity of KCl solution containing a mass of 32.4356 g

KCl / 1 Kg solution;

- temperature compensation polynom

=0.008 b

=0.0005

=-0.1692 b

=-0.0056

=25.3851 b

=-0.0066

=14.0941 b

=-0.0375

=-7.0261 b

=0.0636

=2.7081 b

=-0.0144

=0.008

=0.0005

X=400R

Y=100R

f(T)=(T-15)/[1+0.0162(T-15)]

Note: The formula can be applied for salinity values between 0 and 42 psu.

The formula can be applied for temperatures between -2 °C and 35 °C.

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Hanna-instruments HI 4321 Manual do Utilizador Página 49