Weather Centre Giving Incorrect Temp With Temphum

[asterix2020]

I just bought a temphum and I'm getting a problem with the weather centre display.

Temphum software is currently showing: 26.8 deg C, Hum 68%, Dew pt 20.3 deg C

BYE is showing -15.4C, 46% and dew -24.3 C

Help?

[astroman133]

To me it seems defective to be that inaccurate, but the BYE settings page allows you to enter correction factors to adjust both the temperature and humidity, so with the large correction you may be OK.

 

[admin]

This has been discuss a week or 2 ago.

 

http://forum.otelescope.com/post/setting-up-temperhum-6818787?highlight=temperhum&pid=1282074688

 

Guylain

[asterix2020]

Thanks.  I did try searching but I think I searched for temphum rather than temperhum.

Seems to be fine now.

[admin]

Ultimately I think it's a bug in BYE I need to address.  The same TEMPerHUM in BYE v2 will give the correct reading while in BYE v3 it will not.  The odd thing is that I have not changed how I read the data from the TEMPerHUM in v3 so I'm a little bit at a lost as to why it reads incorrect data in V3.

 

I will get to it eventually... but for now my hands are tied with BackyardNIKON camera connection issues.

 

Thank you

 

Guylain

[Martilla]

Guylain,

 

I am using V3 with the TemperHum and I am experiencing the same problem.

 

On further investigation I have found that the effect is not linear for temperature and humidity.

 

BYE/ºC                TempeHum/ºC           Calibration

-25.9                   -5                            +20.9

-22.7                    2.5                          +25.2 

-21.4                    7.8                          +29.2

-17.8                    19.5                         +37.3

-15.7                    26.25                       +41.95

-14.8                    28.75                       +42.55

 

So as long as calibration is done at the start of the session it should work.

 

Peter

[Alexey Popov]

Hello! 

 

FYI - I have the same problem with TemPerHum v2.

BackyardEOS ver 3.0.3.

 

 

 

[hamiland]

Hi,

   I seem to be having a similar issue using BYE 3.1.3 Premium, my Temp is currently 718.1C and humidity is 17274%, it doesn't quite feel like that in here.  The calibration figures do change the values as expected, however I don't have enough adjustment, and the values do seem to fluctuate a bit, just my 2c as I'm sure this is part of the same issue.

 

Thanks for the fantastic software!

[admin]

As I said before, this will be addressed in 3.1.4. 

 

They keep changing how to read the data from the TEMPerHUM almost every year... so it is a bit hard to keep up.  3.1.4 should be released in 4 to 6 weeks.

 

Regards,

[hamiland]

Thanks for the quick reply, it's definitely not a show stopper issue.  Not that it's critically important, but the link in post #3 doesn't take me anywhere but the forum home, otherwise I may have gleaned that info from the other thread.

[admin]

That link is from the old forum before migration