Endress+Hauser OxyMax W COS 41 - Page 19

OxyMax W COS 41 5 Commissioning
Endress+Hauser 17
3. Determine:
• L = [rel. air pressure at calibration] : [1013 hPa]
• M = 1.02 for calibration in air
M = 1.00 for calibration in air-saturated water
4. Calculate the calibration value:
Calibration value = S • K • L • M
Example:
• Air calibration at 18°C, altitude 500 m above sea level, air pressure 1022 hPa
• S = 9.45 mg/l, K = 0.943, L = 1.0089, M = 1.02
Calibration value = 9.17 mg/l
Table 1:
Saturation value S as a factor of temperature
(taken at an air pressure of 1013 hPa)
Table 2:
Correction factor K as a factor of mean altitude
(above sea level)
°C S [mg/l] °C S [mg/l] °C S [mg/l] °C S [mg/l]
0 14.64 11 10.99 21 8.90 31 7.42
1 14.23 12 10.75 22 8.73 32 7.30
2 13.83 13 10.51 23 8.57 33 7.18
3 13.45 14 10.28 24 8.41 34 7.06
4 13.09 15 10.06 25 8.25 35 6.94
5 12.75 16 9.85 26 8.11 36 6.83
6 12.42 17 9.64 27 7.96 37 6.72
7 12.11 18 9.45 28 7.82 38 6.61
8 11.81 19 9.26 29 7.69 39 6.51
9 11.53 20 9.08 30 7.55 40 6.41
10 11.25
Altitude
[m]
K Altitude
[m]
K Altitude
[m]
K Altitude
[m]
K
0 1.000 550 0.938 1050 0.885 1550 0.834
50 0.994 600 0.932 1100 0.879 1600 0.830
100 0.988 650 0.927 1150 0.874 1650 0.825
150 0.982 700 0.922 1200 0.869 1700 0.820
200 0.977 750 0.916 1250 0.864 1750 0.815
250 0.971 800 0.911 1300 0.859 1800 0.810
300 0.966 850 0.905 1350 0.854 1850 0.805
350 0.960 900 0.900 1400 0.849 1900 0.801
400 0.954 950 0.895 1450 0.844 1950 0.796
450 0.949 1000 0.890 1500 0.839 2000 0.792
500