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Table 3
Correction for salinity effect
Quantity to be
°C
°C
subtracted per mg/l
of NaCl
0.0892
0
26
0.0861
1
27
2
0.0830
28
3
0.0802
29
0.0779
4
30
0.0749
5
31
6
0.0724
32
7
0.0701
33
0.0678
8
34
0.0657
9
35
10
0.0637
36
11
0.0618
37
0.0599
12
38
0.0582
13
39
14
0.0565
40
15
0.0549
41
0.0533
16
42
0.0519
17
43
18
0.0505
44
19
0.0491
45
0.0478
20
46
0.0466
21
47
22
0.0454
48
23
0.0442
49
0.0431
24
50
0.0421
25
14
Quantity to be
subtracted per mg/l of
NaCl
0.0410
0.0400
0.0391
0.0382
0.0373
0.0364
0.0356
0.0348
0.0341
0.0333
0.0326
0.0319
0.0312
0.0306
0.0299
0.0293
0.0287
0.0281
0.0275
0.0270
0.0265
0.0259
0.0254
0.0249
0.0244
TEMPERATURE CALIBRATION
The temperature scale should be calibrated
at least every 3 months or whenever the
readings are in doubt.
•
Immerse
the
60 mm (2.4") of the probe
in a beaker containing wa-
ter.
•
Switch the knob to the
"°C" position and agitate
the water for at least 10
minutes to reach the ther-
mal equilibrium between the
probe and water.
•
Using a ChecktempC or
another thermometer with
a resolution of 0.1°C,
check the temperature
of the water (e.g. 20.0°C).
•
Adjust the "°C" trimmer until the display
shows the noted temperature.
Note: It is important to ensure the thermal
equilibrium between probe and water,
because 1 degree of temperature
difference entails an error of ±3% in
dissolved oxygen measurement.
15
bottom
STB
°C
O
OFF
2
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