I'm creating a PFD, it has a display that shows the kohlsman setting but when it's at 29.92 it displays the letters STD. I can't work out mathematically how to define when this is. I've tried this:(A:KOHLSMAN SETTING HG,inHg) 29.92 - <Althought this yeilds a infinitely small number and not zero as I had hopped>I tried using visible tags but (A:KOHLSMAN SETTING HG,inHg) 29.92 == nor (A:KOHLSMAN SETTING HG,inHg) 29.92 != work.

IIRC FS uses MBars natively then does internal conversions to show InHg. I suppose you could try (A:KOHLSMAN SETTING MB, millibars) 1013 == -or- even better just use a range in InHg -----> 29.919 29.921 (A:KOHLSMAN SETTING HG,inHg) rng Roman

yeah, I agree with Roman – use millibars in your script…then display inHg if req’d.As I recall I had this problem too, and things only worked after I switched to millibars.here's another variation using near

(A:KOHLSMAN SETTING MB,Millibars) near 1013 == if{ #STD# }

Thank You guys, only romans rng approach worked, nothing else worked not even the millibars.

Not sure if this is of any use, I created it for a gent in Sth Africa to use on the default Cessna .It gives a read out in either inches or Hpa/millibars and can set the datum.CheersKarol

<Gauge Name="Altimeter Datum Controller F111" Version="1.0">//By Karol Chlebowski @ 2010 **<Element><Image Name="ALT_DATUM.bmp"/></Element><Element><Visible>(A:Circuit general panel on, bool)</Visible>  <!--KOHLSMAN-->      <Element>        <Position X="16" Y="10"/>        <FormattedText X="32" Y="17" Font="Arial" FontSize="8" LineSpacing="8" Adjust="Center" Color="#99FF66" Bright="Yes" Tabs="0">          <String>%((L:KOHLSMAN, number) 0 == if{ 0 } els{ 1 } )%{case}%{:0}%((A:KOHLSMAN SETTING HG, inHG))%!2.2f!\n %in HG%{:1}%((A:KOHLSMAN SETTING MB, mbar))%!4d!\n %mb HG%{end}</String>        </FormattedText>      </Element></Element><Mouse>     <Area Left="51" Top="7" Width="12" Height="12">	<Tooltip>INC</Tooltip>      <Cursor Type="Hand"/>      <Click Kind="LeftSingle" Repeat="Yes">0 == if{ (>K:KOHLSMAN_INC) }</Click>    </Area>        <Area Left="51" Top="18" Width="12" Height="12">	<Tooltip>DEC</Tooltip>      <Cursor Type="Hand"/>      <Click Kind="LeftSingle" Repeat="Yes">0 == if{ (>K:KOHLSMAN_DEC) }</Click>    </Area>       <Area Left="1" Top="12" Width="12" Height="12">     <Tooltip>%Toggle In or hPa</Tooltip>            <Click Kind="LeftSingle">0 == if{ (L:KOHLSMAN, number) ! (>L:KOHLSMAN, number) }</Click>            <Cursor Type="Hand"/>    </Area></Mouse></Gauge>