12
According to the definition, salinity of a sample in psu (practical salinity units)
is calculated using the following formula:
R
T
- coefficient;
C
T
(sample) - uncompensated conductivity at T °C;
C(35,15)= 42.914
m
S/cm - the corresponding conductivity of KCl solution
containing a mass of 32.4356 g KCl / 1 Kg solution;
r
T
- temperature compensation polynom
a
0
= 0.008
b
0
=0.0005
a
1
= -0.1692
b
1
= -0.0056
a
2
= 25.3851
b
2
= -0.0066
a
3
= 14.0941
b
3
= -0.0375
a
4
= -7.0261
b
4
= 0.0636
a
5
= 2.7081
b
5
= -0.0144
c
0
= 0.008
c
1
= 0.0005
X = 400R
T
Y = 100R
T
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.
To reach this range press
Mode
while in Salinity range until the practical
salinity scale [PSU] is displayed.