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32 MW
where:
R
T
C
(sample)
T
C (35, 15) = 42.914 mS/cm
r
T
a
= 0.008
0
a
= -0.1692
1
a
= 25.3851
2
a
= 14.0941
3
a
= -7.0261
4
a
= 2.7081
5
%NaCl Percentage
In this scale 100% salinity is equivalent to roughly 10% solids.
If the reading is outside the range, the full-scale value (400.0%)
will be displayed blinking.
Natural Sea Water
The Natural Sea Water scale extends from 0.00 to 80.00 g/L.
It determines salinity based upon a conductivity ratio of sample to
"standard seawater" at 15 °C.
where:
R
is the conductivity ratio
15
C
(sample) is uncompensated conductivity at T °C
T
C (35, 15) = 42.914 mS/cm is the corresponding conductivity of
KCI solution containing a mass of 32.4356 g KCl/1 Kg solution
r
is temperature compensation polynomial
T
Salinity (S) is defined by the following equation:
S = – 0.08996 + 28.2929729R
Note: The formula can be applied for temperatures between
10 and 31 °C.
Portable Meter
ratio of sample conductivity to standard
conductivity at Temperature = (T) °C
uncompensated conductivity at T °C
the corresponding conductivity of
KCI solution containing a mass of
32.4356 g KCl/1 Kg solution
temperature compensation polynomial
b
= 0.0005
0
b
= -0.0056
1
b
= -0.0066
2
b
= -0.0375
3
b
= 0.0636
4
b
= -0.01442
5
– 10.67869R
3
15
+ 12.80832R
15
+ 5.98624R
4
15
c
= 0.008
0
c
= 0.0005
1
X = 400R
T
Y = 100R
T
2
15
– 1.32311R
5
15
–
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