Hach-Lange EVITA OXY Basic User Manual - Manual (Page 121)

English 121
Appendix I
Appendix II a
Appendix II b
Check of the zero point
Mix 1 g sodium sulfite (Na
2
SO
3
), 1 mg cobalt (II) salt, (cobalt (II) chloride
hexahydrate CoCI
2
, 6H
2
O) with 1 liter water to remove the oxygen from
the water. Then stir the water and measure the oxygen concentration to
determine the zero point.
Warranty, liability and complaints
Hach Lange GmbH warrants that the supplied product is free of
material- and processing defects and undertakes to repair or to replace
any defective parts at zero cost (no composition- or durability
guarantee).
Deviating from our general terms of business, a limitation period for
defect-related claims of 12 months applies for the devices of the EVITA
series.
Default values and significance of the deviation from these values
Parameter
Default
setting
Deviation
Significance (as % of
the current value)
Atmospheric
air pressure 1013.25 mb
ar
10 mbar approximately 1
Relative
humidity
100 % 10 % approximately 0.3
Salinity 0 g/L 1 g/L approximately 1
Temperature
Solubility of oxygen in water in equilibrium with air
(»100 %) at 101.325 kPa
°C mg/L or ppm
0 14.62
1 14.22
2 13.83
3 13.46
4 13.11
5 12.77
6 12.45
7 12.14
8 11.84
9 11.56
10 11.29
11 11.03
12 10.78
13 10.54
14 10.31
15 10.08
16 9.87
17 9.66
18 9.47
19 9.28
20 9.09
21 8.91
22 8.74
23 8.58
24 8.42
25 8.26
26 8.11
27 7.97
28 7.83
29 7.69
30 7.56