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35 g/L
9.0
8.6
8.3
8.0
7.6
7.4
7.1
6.9
6.6
6.4
30 g/L
9.3
8.9
8.6
8.2
7.9
7.6
7.3
7.1
6.8
6.6
°C
10
12
14
16
18
20
22
24
26
28
0 g/L
11.3
10.8
10.3
9.9
9.5
9.1
8.7
8.4
8.1
7.8
10 g/L
10.6
10.1
9.7
9.3
8.9
8.5
8.2
7.9
7.6
7.4
20 g/L
9.9
9.5
9.1
8.7
8.4
8.0
7.8
7.5
7.2
7.0
Salinity (g/L) at Sea Level
°F
50.0
53.6
57.2
60.8
64.4
68.0
71.6
75.2
78.8
82.4
The table provides an idea of the error that can
be introduced at different altitudes and the
quantity to be subtracted to correct the reading.
SALINITY COMPENSATION
HI 9143
Press FACTOR twice and “F2”
will be displayed. Press UP
and DOWN to set the salinity
between 0 and 40 g/L (0 to 80
g/L for HI 9143M). Press
FACTOR again to display the
temperature.
HI 9145
All D.O. readouts are referred to 0 g/L of
salinity. Salinity affects D.O. concentration by
decreasing its value.
The table below shows the maximum solubility
of oxygen at various temperatures and salinity
levels. By using the table, the quantity to be
subtracted to correct the reading can be
calculated.
FACTOR
or
SAMPLE
F2
ppm
11