Re: [weewx-user] New VP2 setup, rain cups and calibration

[tomnykds]

The light isn't on, so that's not it.  I am seeing the same numbers between 
the console and weewx now, which is nice.  Offsetting the temp
didn't change the humidity delta, but it sounds like I need to get ahold of 
Davis next.
Thx, Chris

On Sunday, March 4, 2018 at 4:25:38 PM UTC-8, Dave Webb wrote:
>
> Chris,
>
>  Is the inside temp higher than the outside temp? If it is, is the console 
> light on? I found a 2-3 degree difference with console light on because it 
> generates heat inside the console. 
>
>
>
> Dave-KB1PVH
>
>
> Sent from my Galaxy S7
>
> On Mar 4, 2018 6:03 PM,  wrote:
>
>> I sprung for Vantage Pro 2 with aspiration.  I have it hooked up to an 
>> RPi with the serial logger.  That part seems to work OK so far.
>> My question is about which wind cups (large or small) is included in the 
>> standard kit these days?  The Davis site is woefully lacking
>> in detail, and even the specs in the books are missing that one.  The 
>> other question is about calibration.  I have the console and ISS
>> sitting in the same place, and the temp and humidity don't match (off a 
>> couple of degrees and few percent).  I found where to offset
>> the values in the console, but not sure if either are correct.  Is this a 
>> matter of averaging the values of a bunch of thermometers
>> and adjusting?  I found two more temp/hum units, and I've adjusted the 
>> console as needed, but does setting calibration change
>> the values that the data-logger sees?  It doesn't seem like it, meaning I 
>> need to duplicate the offsets in the weewx.conf.
>>
>> Thx, Chris
>>
>> -- 
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>

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Re: [weewx-user] New VP2 setup, rain cups and calibration

[Dave Webb KB1PVH]

Chris,

 Is the inside temp higher than the outside temp? If it is, is the console
light on? I found a 2-3 degree difference with console light on because it
generates heat inside the console.



Dave-KB1PVH


Sent from my Galaxy S7

On Mar 4, 2018 6:03 PM,  wrote:

> I sprung for Vantage Pro 2 with aspiration.  I have it hooked up to an RPi
> with the serial logger.  That part seems to work OK so far.
> My question is about which wind cups (large or small) is included in the
> standard kit these days?  The Davis site is woefully lacking
> in detail, and even the specs in the books are missing that one.  The
> other question is about calibration.  I have the console and ISS
> sitting in the same place, and the temp and humidity don't match (off a
> couple of degrees and few percent).  I found where to offset
> the values in the console, but not sure if either are correct.  Is this a
> matter of averaging the values of a bunch of thermometers
> and adjusting?  I found two more temp/hum units, and I've adjusted the
> console as needed, but does setting calibration change
> the values that the data-logger sees?  It doesn't seem like it, meaning I
> need to duplicate the offsets in the weewx.conf.
>
> Thx, Chris
>
> --
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> "weewx-user" group.
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Re: [weewx-user] New VP2 setup, rain cups and calibration

[Thomas Keffer]

These are really questions for Davis tech support (which is actually quite
good).

Generally, the console and wind cups are matched, so you should not have to
do anything, but I would ask Davis how to tell them apart.

Davis does a good job of calibrating their temperature sensors, so I'm
surprised you would find such a big discrepancy. Again, ask Davis.

Changing the offset within the console should affect what the logger sees,
so you should not need to add a calibration to weewx.conf.

-tk

On Sun, Mar 4, 2018 at 3:03 PM,  wrote:

> I sprung for Vantage Pro 2 with aspiration.  I have it hooked up to an RPi
> with the serial logger.  That part seems to work OK so far.
> My question is about which wind cups (large or small) is included in the
> standard kit these days?  The Davis site is woefully lacking
> in detail, and even the specs in the books are missing that one.  The
> other question is about calibration.  I have the console and ISS
> sitting in the same place, and the temp and humidity don't match (off a
> couple of degrees and few percent).  I found where to offset
> the values in the console, but not sure if either are correct.  Is this a
> matter of averaging the values of a bunch of thermometers
> and adjusting?  I found two more temp/hum units, and I've adjusted the
> console as needed, but does setting calibration change
> the values that the data-logger sees?  It doesn't seem like it, meaning I
> need to duplicate the offsets in the weewx.conf.
>
> Thx, Chris
>
> --
> You received this message because you are subscribed to the Google Groups
> "weewx-user" group.
> To unsubscribe from this group and stop receiving emails from it, send an
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>

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[weewx-user] New VP2 setup, rain cups and calibration

[tomnykds]

I sprung for Vantage Pro 2 with aspiration.  I have it hooked up to an RPi 
with the serial logger.  That part seems to work OK so far.
My question is about which wind cups (large or small) is included in the 
standard kit these days?  The Davis site is woefully lacking
in detail, and even the specs in the books are missing that one.  The other 
question is about calibration.  I have the console and ISS
sitting in the same place, and the temp and humidity don't match (off a 
couple of degrees and few percent).  I found where to offset
the values in the console, but not sure if either are correct.  Is this a 
matter of averaging the values of a bunch of thermometers
and adjusting?  I found two more temp/hum units, and I've adjusted the 
console as needed, but does setting calibration change
the values that the data-logger sees?  It doesn't seem like it, meaning I 
need to duplicate the offsets in the weewx.conf.

Thx, Chris

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