Author Topic: Davis VP2 Console displays tenths in F  (Read 1889 times)

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Offline ValentineWeather

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Davis VP2 Console displays tenths in F
« on: October 21, 2018, 12:38:53 PM »
I was always under impression Davis VP2 console only displayed (F) temperature to nearest integer no decimal.  Old threads repeat this assumption so not sure what has changed  The Davis console will read in tenths for both F and C.
Some threads even saying if you want tenths you will need an Envoy8x.

Maybe this is well known but with other threads saying it won't thought I would share.

1-Press temperature one time,
2- Press 2nd  followed  graphs/units button... this will toggle between C or F keep repeating step #2 until you find tenths in desired F or C.
« Last Edit: October 21, 2018, 12:45:05 PM by ValentineWeather »
Randy

Offline PaulMy

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Re: Davis VP2 Console displays tenths in F
« Reply #1 on: October 21, 2018, 12:58:30 PM »
Mine displays in C decimal http://www.komokaweather.com/weather/davconvp2CU.php  ;) (and yes, following Randy's instructions on the console it does show decimal)

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Offline johnd

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Re: Davis VP2 Console displays tenths in F
« Reply #2 on: October 21, 2018, 01:01:11 PM »
Some threads even saying if you want tenths you will need an Envoy8x.

I think you're getting confused with whether a thread is about the standard ISS or inside temperature, or about temp sensors attached to supplementary transmitters like 6372.

Standard inside/outside temps are always available on the console to 0.1F.

But supplementary temps are only available as integer F unless  you use an 8X or something similar like an MB Pro Red that is able to process data from multiple ISS units..
« Last Edit: October 21, 2018, 01:10:21 PM by johnd »
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Offline ValentineWeather

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Re: Davis VP2 Console displays tenths in F
« Reply #3 on: October 21, 2018, 01:21:07 PM »
Some threads even saying if you want tenths you will need an Envoy8x.

I think you're getting confused with whether a thread is about the standard ISS or inside temperature, or about temp sensors attached to supplementary transmitters like 6372.

Standard inside/outside temps are always available on the console to 0.1F.

But supplementary temps are only available as integer F unless  you use an 8X or something similar like an MB Pro Red that is able to process data from multiple ISS units..

Yes could be I was confused but now I can see my other temp/hum stations in tenths also with console. Maybe they don't change is what you are saying.
« Last Edit: October 21, 2018, 01:24:13 PM by ValentineWeather »
Randy

Offline ValentineWeather

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Re: Davis VP2 Console displays tenths in F
« Reply #4 on: October 21, 2018, 01:31:47 PM »
Even though it shows supplemental stations in tenths it stays on zero. Oh well  ](*,)
Randy

Offline Bushman

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Re: Davis VP2 Console displays tenths in F
« Reply #5 on: October 21, 2018, 01:47:57 PM »
Yeah, a real DA move by Davis on that one!  Makes the extra sensors less than useful.  I think this is documented in the LOOP2 packet string.  The other thing that burns me is the battery voltage. 
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Offline johnd

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Re: Davis VP2 Console displays tenths in F
« Reply #6 on: October 21, 2018, 01:58:53 PM »
Yes could be I was confused but now I can see my other temp/hum stations in tenths also with console. Maybe they don't change is what you are saying.

Well, you've got a pretty unique console there then - could be quite valuable ;)

From memory, there are 3 scenarios in which you could see decimal degrees from a supplementary temp sensor:

1. If the supplementary one is being received as an ISS (ie in place of the main ISS)

2. Can't remember without checking, but very possible that suppl. temps show as xx.0F if decimal degrees are selected.

3. If you have readings set to show in C then you will apparently see decimal C values but they will be a slightly irregular staircase of values with each increment corresponding to 1F.
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Offline Bushman

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Re: Davis VP2 Console displays tenths in F
« Reply #7 on: October 21, 2018, 02:32:23 PM »
Neither of my two extra temp/hum sensors report 1/10ths.  Anywhere.
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Offline ValentineWeather

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Re: Davis VP2 Console displays tenths in F
« Reply #8 on: October 21, 2018, 03:46:36 PM »


2. Can't remember without checking, but very possible that suppl. temps show as xx.0F if decimal degrees are selected.


They do show decimals as the image of console clearly shows with transponder #4.  But it's all for show.. I get it now.  :evil:
Randy

Offline Bushman

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Re: Davis VP2 Console displays tenths in F
« Reply #9 on: October 21, 2018, 05:00:51 PM »
"This field supports seven extra temperature stations.
Each byte is one extra temperature value in whole degrees F with
an offset of 90 degrees. For example, a value of 0 = -90F ; a
value of 100 = 10F ; and a value of 169 = 79F"

Same for leaf and soil.  :(  Very VERY short-sighted IMHO.
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Offline scwxguy

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Re: Davis VP2 Console displays tenths in F
« Reply #10 on: October 23, 2018, 03:49:49 PM »
I was always under impression Davis VP2 console only displayed (F) temperature to nearest integer no decimal.  Old threads repeat this assumption so not sure what has changed  The Davis console will read in tenths for both F and C.
Some threads even saying if you want tenths you will need an Envoy8x.

Maybe this is well known but with other threads saying it won't thought I would share.

1-Press temperature one time,
2- Press 2nd  followed  graphs/units button... this will toggle between C or F keep repeating step #2 until you find tenths in desired F or C.

Cool hack! Thank you for sharing! Confirm it works!

Offline ValentineWeather

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Re: Davis VP2 Console displays tenths in F
« Reply #11 on: October 23, 2018, 05:23:11 PM »
It won't work on supplemental stations however. IE additional ISS units reporting temp/hum. It shows xx.0 but .0 tenths never changes.
Randy

Offline Gretnawx

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Re: Davis VP2 Console displays tenths in F
« Reply #12 on: October 23, 2018, 05:38:30 PM »
The specified accuracy of the Davis temperature sensors is +/- 1F.  So while displaying them in tenths of a degree might seem impressive the sensed data are not accurate enough to justify it.  Precision does not always equate to accuracy. 
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Offline CW2274

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Re: Davis VP2 Console displays tenths in F
« Reply #13 on: October 23, 2018, 05:46:16 PM »
The specified accuracy of the Davis temperature sensors is +/- 1F.  So while displaying them in tenths of a degree might seem impressive the sensed data are not accurate enough to justify it.
Disagree.
BTW, the current sensor in the VP2 is accurate to 0.2C.

Offline Gretnawx

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Re: Davis VP2 Console displays tenths in F
« Reply #14 on: October 23, 2018, 05:55:52 PM »
ISS temperature specifications is on page six of attached.   It says +/-.5 degree F so displaying to the nearest degree is appropriate for that accuracy.
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Offline CW2274

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Re: Davis VP2 Console displays tenths in F
« Reply #15 on: October 23, 2018, 06:13:07 PM »
ISS temperature specifications is on page six of attached.   It says +/-.5 degree F so displaying to the nearest degree is appropriate for that accuracy.
Even if it was only 1F, I'd still want it to the tenth.

Offline Old Tele man

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Re: Davis VP2 Console displays tenths in F
« Reply #16 on: October 23, 2018, 10:27:19 PM »
You need 10X accuracy to verify that it meets 1X accuracy.
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Offline CW2274

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Re: Davis VP2 Console displays tenths in F
« Reply #17 on: October 24, 2018, 12:12:56 AM »
You need 10X accuracy to verify that it meets 1X accuracy.
Thank you. For the life of me, I couldn't think of how to articulate that thought.

 

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