Yokogawa DO202 2-Wire Dissolved Oxygen Analyzer User Manual
Page 57
IM 12J05C01-01E
6-6 Calibration Procedure
Table 6-1. Solubility of oxygen (mg/l) in water as a function of temperature & salinity (ISO 5814)
Temp
Solubility of oxygen in water in equilibrium
Correction to be substracted for each degree of salinity
with air
expressed in grams per kilogram of total salts in water
@101.325kPa[pO
2
] [∆pO
2
]
°C
mg/l (ppm)
mg/l (ppm)
0 14.62
0.0875
1
14.22
0.0843
2
13.83
0.0818
3
13.46
0.0789
4
13.11
0.0760
5
12.77
0.0739
6
12.45
0.0714
7
12.14
0.0693
8
11.84
0.0671
9
11.56
0.0650
10
11.29
0.0632
11
11.03
0.0614
12
10.78
0.0593
13
10.54
0.0582
14
10.31
0.0561
15
10.08
0.0545
16
9.87
0.0532
17
9.66
0.0514
18
9.47
0.0500
19
9.28
0.0489
20
9.09
0.0475
21
8.91
0.0464
22
8.74
0.0453
23
8.58
0.0443
24
8.42
0.0432
25
8.26
0.0421
26
8.11
0.0407
27
7.97
0.0400
28
7.83
0.0389
29
7.69
0.0382
30
7.56
0.0371
Table 6-3. Solubility of oxygen (mg/l) of sea water & fresh
water (based on sea level barometric pressure of 760 mm Hg)
Table 6-2. Solubility of oxygen (mg/l) at various
temperatures and elevations (based on sea level barometric
pressure of 760 mm Hg)
Temp
Elevation (metres above sea level)
°C
0 300 600 900 1200 1500 1800
0 14.6 14.1 13.6 13.2 12.7 12.3 11.8
2 13.8 13.3 12.9 12.4 12.0 11.6 11.2
4 13.1 12.7 12.2 11.9 11.4 11.0 10.6
6 12.4 12.0 11.6 11.2 10.8 10.4 10.1
8 11.8 11.4 11.0 10.6 10.3 9.9 9.6
10 11.3 10.9 10.5 10.2 9.8 9.5 9.2
12 10.8 10.4 10.1 9.7 9.4 9.1 8.8
14 10.3 9.9 9.6 9.3 9.0 8.7 8.3
16 9.9 9.5 9.2 8.9 8.6 8.3 8.0
18 9.5 9.2 8.9 8.6 8.3 8.0 7.7
20 9.1 8.8 8.5 8.2 7.9 7.7 7.4
22 8.7 8.4 8.1 7.8 7.6 7.3 7.1
24 8.4 8.1 7.8 7.6 7.3 7.1 6.8
26 8.1 7.8 7.6 7.3 7.0 6.8 6.6
28 7.8 7.5 7.3 7.0 6.8 6.6 6.3
30 7.5 7.2 7.0 6.8 6.5 6.3 6.1
32 7.3 7.1 6.8 6.6 6.4 6.1 5.9
34 7.1 6.9 6.6 6.4 6.2 6.0 5.8
36 6.8 6.6 6.3 6.1 5.9 5.7 5.5
38 6.6 6.4 6.2 5.9 5.7 5.6 5.4
40 6.4 6.2 6.0 5.8 5.6 5.4 5.2
Temp Solubility
Sea water
Fresh water
°C
mg/l (ppm)
mg/l (ppm)
0
11.97
14.62
2
11.36
13.84
4
10.82
13.13
6
10.29
12.48
8
9.84
11.87
10
9.43
11.33
12
9.05
10.83
14
8.69
10.37
16
8.37
9.95
18
8.06
9.54
20
7.77
9.17
22
1.48
8.83
24
7.21
8.53
26
6.93
8.22
28
6.67
7.92
30
6.41
7.63