[dsg-svt] Dew point calculation

[Brian Eng]

This is only for the software (VME) interlocks...

The simple one should really only be used when RH is >50%
So they should probably all be changed to magnus.
The formula looks like it's calculating the dew point correctly on the expert screen.

I'm not so sure about the dew point interlock though, that seems wrong.

As an example for SB6 H1
RH ~ 2%
T ~ -10C
Dp ~ -35C (magnus, simple says -5C)
DewTempDiff ~ 50C  (shouldn't it be 25C?)

----- Original Message -----
> From: "Yuri Gotra" <gotra at jlab.org>
> To: "dsg-svt" <dsg-svt at jlab.org>
> Sent: Wednesday, May 16, 2018 9:18:52 AM
> Subject: [dsg-svt] Dew point calculation

> Hello Peter,
> 
> Could you please check the dew point calculation.
> 
> In the CSS for T=7 C and RH=5% the dew point difference is 19 C which
> means the dew point is -12 C.
> 
> These calculators give the dew point at -30 C.
> 
> http://hyperphysics.phy-astr.gsu.edu/hbase/Kinetic/relhum.html#c4
> 
> http://www.dpcalc.org/
> 
> Thank you