9-28
Chapter 9: Inspection and Maintenance
42/24-10 EN Rev. 9
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.
Analyzer Module
Pressure Sensor
Uras26, Limas11, Caldos27
built-in at the factory
Caldos25 not
necessary
Magnos206, Magnos27
built-in at the factory as an option
Which analyzer
modules have a
pressure sensor?
MultiFID14
cannot be built in
Use the
MENU
→
Diagnostic/Information
→
System overview
menu
item and select the appropriate analyzer module to determine if a pressure sensor
is installed.
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
Air Pressure Values
2000
793
11.50
595 23.43
