This gauge has its Kohlsman scale calibrated in Hectopascals, or millibars.
=============================================================================

Unzip the file Altimeter_HPa.zip to a temporary folder
Copy the Altimeter_HPa.CAB file to the panel folder of your aircraft

Make a safe copy of panel.cfg, e.g. panel.cfg.saf
Open the panel.cfg file in Notepad, and edit the text by replacing the altimeter gauge name you find with Altimeter_HPa!Altimeter
e.g. for the default C172
change
gauge00=Cessna!Altimeter
to
gauge00=Altimeter_HPa!Altimeter
Do not change the numbers on that line, and make sure that all the commas are present after the text and between the numbers.

Do the same for the Virtual Cockpit [vcockpit01] and any other section, such as a landing panel where there is an Altimeter line.

Aircraft without a Minipanel
============================
In the [Window Titles] section (top of the file) add
windowxx=Altimeter
where xx is the next sequential number in the list of windows. e.g.

[Window Titles]
Window00=Main Panel
Window01=Radio Stack
Window02=GPS
Window03=Altimeter



Aircraft with a Minipanel
=========================
e.g. the default C172
Place the line
windowxx=Altimeter
last but one in the list, ensuring that the Minipanel entry is the last one, as shown below.

[Window Titles]
Window00=Main Panel
Window01=Radio Stack
Window02=GPS
Window03=IFR Panel
Window04=Landing View
Window05=Altimeter
Window06=Mini Panel



Finally, copy the following code into panel.cfg after the last window section before the [vcockpit01] section.
//--------------------------------------------------------
[Windowxx]
Background_color=0,0,0 
size_mm=305,305
window_size_ratio=1.000  
position=0
visible=0
ident=150
window_size= 0.200, 0.267
window_pos= 0.300, 0.490

gauge00=Altimeter_HPa!Altimeter
//--------------------------------------------------------

where xx is the same number that you used in the [Window Titles] section.
Note that in the default C172, the various [Window00], [Window01] etc. sections are not in sequential order.  This is not important as long as the numbers xx as in [Windowxx] are correct and match the [Window Titles] entries. You may prefer to move them all into a sequential order.


When you open that aircraft now, you should have an altimeter with a Hectopascals Kohlsman Scale.  In addition, when you click on the face of the gauge, a large version will be displayed which is easier to read for changing the barometric pressure value. Clicking the enlarged image removes it again

Unmodified default Cessna 172
=============================
If you have made no other changes to the default Cessna 172 panel, you can substitute the existing panel.cfg file directly with the one included in the zip.  But do keep the original file (by renaming) as a backup.  The panel.cfg file included in the zip has the [Windowxx] sections in sequential order.

Peter Dodds
September 2013
