64
ACX Analyzer System Commissioning Instruction
CI/ACX-EN Rev. D
AO2000: Air Pressure Correction
Air Pressure Effect
A specific amount of change in air pressure will result in a specific change in a
measurement value, depending on the measurement principle employed by the
analyzer module.
Measures to Minimize
Air Pressure Effect
Air pressure effect can be minimized by:
•
Installing a pressure sensor in the analyzer module (this can only be done at the
factory) or
•
Entering the current atmospheric pressure as a correction value.
In which analyzer
modules is a pressure
sensor installed?
Analyzer module
Pressure sensor
Uras26, Limas21, Magnos206, Magnos28
installed ex works
Magnos27, Fidas24
cannot be installed
Use the
MENU
→
Diagnostic/Information
→
System overview
menu
item and select the appropriate analyzer module to determine if a pressure sensor is
installed.
Air Pressure Values
Operating Altitude
Mean Air Pressure
meters above mean
sea level
hPa (mbar)
psi
mm Hg (Torr)
in Hg
–200
1037
15.04
778
30.63
–100
1025
14.87
769
30.28
±
0
1013
14.69
760
29.92
+100
1001
14.52
751
29.57
200
989
14.34
742
29.21
300
977
14.17
733
28.86
400
965
14.00
724
28.50
500
955
13.85
716
28.19
600
943
13.68
707
27.84
700
932
13.52
699
27.52
800
921
13.36
691
27.21
900
909
13.18
682
26.85
1000
899
13.04
674
26.54
1100
888
12.88
666
26.22
1200
877
12.72
658
25.91
1300
867
12.57
650
25.59
1400
856
12.42
642
25.28
1500
845
12.26
634
24.96
1600
835
12.11
626
24.65
1700
825
11.97
619
24.37
1800
815
11.82
611
24.06
1900
804
11.66
603
23.74
2000
793
11.50
595
23.43