Endress+Hauser Oxymax COS22D, Operating Instructions Manual

Page: 22 / 40

Function Oxymax COS22D
22
Hauser
3. Calculate the factor L :
4. Calculate the calibration value C :
C = S
.
K
.
L
Example
• Air calibration at 18 ˚ C (64 ˚ F), altitude 500 m (1650 ft) above sea level, air pressure 1009 hPa (405
inH
2
O)
• S = 9.45 mg/l, K = 0.943, L = 0.996
Calibration value C = 8.88 mg/l.
You do not need factor K from the table if your device returns the absolute air pressure L
abs
(location-dependent air pressure) as the measured value.
Thus, the formula for calculation is: C = S
.
L
abs
.
Altitude
[m (ft)]
K Altitude
[m / ft]
K Altitude
[m / ft]
K Altitude
[m / ft]
K
0 1.000 550 (1800) 0.938 1050 (3450) 0.885 1550 (5090) 0.834
50 (160) 0.994 600 (1980) 0.932 1100 (3610) 0.879 1600 (5250) 0.830
100 (330) 0.988 650 (2130) 0.927 1150 (3770) 0.874 1650 (5410) 0.825
150 (490) 0.982 700 (2300) 0.922 1200 (3940) 0.869 1700 (5580) 0.820
200 (660) 0.977 750 (2460) 0.916 1250 (4100) 0.864 1750 (5740) 0.815
250 (820) 0.971 800 (2620) 0.911 1300 (4270) 0.859 1800 (5910) 0.810
300 (980) 0.966 850 (2790) 0.905 1350 (4430) 0.854 1850 (6070) 0.805
350 (1150) 0.960 900 (2950) 0.900 1400 (4600) 0.849 1900 (6230) 0.801
400 (1320) 0.954 950 (3120) 0.895 1450 (4760) 0.844 1950 (6400) 0.796
450 (1480) 0.949 1000 (3300) 0.890 1500 (4920) 0.839 2000 (6560) 0.792
500 (1650) 0.943
L=
relative air pressure during calibration
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1013 hPa