Vaisala PTB330 - Manual (Page 136)

USER'S GUIDE____________________________________________________________________
134 _________________________________________________________________ M210855EN-D
where:
p = measured air pressure [hPa]
h
HCP
= height difference between the barometer and reference
level [m]
ICAOQNH Mode for QNH and QFE
190263 0 32 . 11880 77 . 44330 QFE H
  
 
25588 5
15 . 288
0065 . 0
0 . 1 25 . 1013 




  
   QNH
h H
QNH
NOTE QNH and QFE values are rounded down to the next whole number in
ICAOQNH mode.
Table 33 Symbols used in QNH calculation formulas
Symbol Description
QNH
Resulting value of QNH in [hPa] (before any rounding).
QFE Current value of QFE in [hPa].
h
QNH
Value of HQNH setting (on page 80) in meters.