Function
Hauser
17
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
.
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
-------------------------------------------------------------------------
1013 hPa
Altitude
[m (ft)]
K
Altitude
[m / ft]
K
Altitude
[m / ft]
K
Altitude
[m / ft]
K