WH3080 solar readings

actioman · Post by **actioman** » Mon 20 Jun 2011 1:33 pm

steve wrote:It looks like the new code isn't working, but I can't see anything wrong with it. Are you sure you're using the latest build?

No, it wasn't! I just finished installed it. Let's see how it behaves. Thanks!

It's hard to say; unless you have some other data to compare with, you can't know whether you're getting correct W/m2 values. Maybe it's correct, but the max is just too low.

I have two Davis weather stations, near to mine (about 10km / 6.2 miles) . Their values are these, for yesterday

Source: http://www.wunderground.com/weatherstat ... &year=2011

Source: http://www.wunderground.com/weatherstat ... &year=2011

The only thing to stand out in the second weather station, are the UV values too low (possibly a problem of the station). But in solar radiation are similar and significantly lower than those with my solar module...

dpmiller wrote:I've seen the light and UV readings on the console drop to --- occasionally. Temp and wind is still transmitted so it might be a connection issue w. the solar unit. I squeezed the pins on the plug, haven't seen the issue since. Might be worth a try?

I do not have this problem (the "---"). But I was there disconnect and re-connect everything. Even I used the "reset" button which is in solar module. But everything remains the same. Thaks for your help too!

Post by **steve** » Mon 20 Jun 2011 1:44 pm

actioman wrote:I have two Davis weather stations, near to mine (about 10km / 6.2 miles) . Their values are these, for yesterday

So that's making your theoretical max look pretty good, assuming you had bright sunshine. So you probably just need to reduce that LuxtoWM2 value by quite a bit. You've got a peak of about 1250 and it needs to be about 975, so if you were using 0.007 it looks like you need about 0.0055.

actioman · Post by **actioman** » Wed 22 Jun 2011 1:37 pm

steve wrote:
actioman wrote:I have two Davis weather stations, near to mine (about 10km / 6.2 miles) . Their values are these, for yesterday
So that's making your theoretical max look pretty good, assuming you had bright sunshine. So you probably just need to reduce that LuxtoWM2 value by quite a bit. You've got a peak of about 1250 and it needs to be about 975, so if you were using 0.007 it looks like you need about 0.0055.

Steve hello!

I suspect that the formula you gave me (LuxToWM2=0.0055), does not work in Cumulus.
- Whatever the value I put, nothing changes.
- Put the formula or not in "cumuluns.ini", is the same. There is no change.

Just to be sure I'm doing well, is this?

Code: Select all

[MainForm]
Left=110
Top=76

[Station]
Type=7
Model=WH3080
Port=0
Latitude=38,8672222222222
Longitude=-7,17333333333333
LatTxt=N&nbsp;38&deg;&nbsp;52'&nbsp;02"
LonTxt=W&nbsp;07&deg;&nbsp;10'&nbsp;24"
Altitude=300
AltitudeInFeet=0
Humidity98Fix=0
Wind10MinAverage=1
UseSpeedForAvgCalc=1
CalculatedDP=1
CalculatedWC=1
RolloverHour=0
Use10amInSummer=1
ConfirmClose=1
CloseOnSuspend=1
RestartIfUnplugged=0
SyncDavisClock=0
DataLogInterval=1
WindUnit=2
PressureUnit=1
RainUnit=0
TempUnit=0
LocName=Elvas
LocDesc=Elvas - PORTUGAL
StartDate=21-04-2011
WindComp=1
LastLoggerDownload=21-04-2010 21:34:29
YTDrain=0
YTDrainyear=0
EWInterval=0
EWFile=
UseDataLogger=1
UseCumulusForecast=1
HourlyForecast=1
UseCumulusPresstrendstr=0
FCpressinMB=1
FClowpress=950
FChighpress=1050
ForceVPBarUpdate=0
UseZeroBearing=0
VP2ConnectionType=1
VP2TCPPort=22222
VP2IPAddr=0.0.0.0
WarnMultiple=0
RoundWindSpeed=0
VP2PeriodicDisconnectInterval=0
EWtempdiff=999
EWpressurediff=999
EWhumiditydiff=999
EWgustdiff=999
EWwinddiff=999
EWminpressureMB=900
EWmaxpressureMB=1200
RainSeasonStart=1
RainDayThreshold=-1
CloudBaseInFeet=0
LuxToWM2=0.0055
EWmaxHourlyRain=999
EWmaxRainRate=999

What do you say Steve?

Thanks!

Post by **steve** » Wed 22 Jun 2011 1:47 pm

Sorry about that, I gave you incorrect information. The LuxToWM2 setting has to go in the [Solar] section in cumulus.ini.

actioman · Post by **actioman** » Wed 22 Jun 2011 2:25 pm

steve wrote:Sorry about that, I gave you incorrect information. The LuxToWM2 setting has to go in the [Solar] section in cumulus.ini.

Ahhhh ok!

I found it strange, but you 're the master. So I do not say anything!

I will test it and then tell you something.

I take this opportunity to put another question:

I have already installed the new version that corrects the UV values when they are bigger than 12, but now a new problem arises. If the station loses contact with the UV sensor (happened this morning), Cumulus interprets as UV = 16!

Is there any chance to correct this?

Debug_Elvas-22JUN11.rar

Post by **steve** » Wed 22 Jun 2011 2:44 pm

Ah, yes, it sends FF when that happens. I had code in for that, but I've lost it because of the new code - I'll fix it.

actioman · Post by **actioman** » Fri 24 Jun 2011 9:23 pm

steve wrote:Ah, yes, it sends FF when that happens. I had code in for that, but I've lost it because of the new code - I'll fix it.

Thanks Steve!

Another request, if possible... I already have the new solar module and now have a more correct behavior of the UV value. The problem is that the readings are too high (more 4 UV) compared with other nearby weather stations. Is there any way of you implement a correction to the UV sensor in Cumulus? In order to add or remove UV values?
In my case I would like to remove 4 values and UV would be a perfect reading!

This is the graph of the UV value from today:

And this is the graph of the UV value from today (changed for me, removing 4 UV from every reading):

So if this were possible it would be amazing! It's just an idea.

I could not let to publicly thank Martin and his company Signatrol for their efforts and strong desire to help!
Was always available, exchanged several e-mails with me, even on a holiday in England he answered me and tried to solve my needs!
Companies like Signatrol are an example to follow and we must talk about them to others so they know. In Portugal have never seen any company with this constant concern to the customers. Many thanks for everything!

Post by **steve** » Fri 24 Jun 2011 9:28 pm

I can put in a 'calibration' setting for UV like the others...

actioman · Post by **actioman** » Fri 24 Jun 2011 9:42 pm

steve wrote:I can put in a 'calibration' setting for UV like the others...

Amazing then!! Steve what you can not do!?

What a great work that you have here!

Just to serve as a comparison, here I leave you two UV graphics from weather stations near mine:

actioman · Post by **actioman** » Fri 01 Jul 2011 3:36 pm

steve wrote:
actioman wrote:I have already installed the new version that corrects the UV values when they are bigger than 12, but now a new problem arises. If the station loses contact with the UV sensor (happened this morning), Cumulus interprets as UV = 16!

Is there any chance to correct this?
Ah, yes, it sends FF when that happens. I had code in for that, but I've lost it because of the new code - I'll fix it.

steve wrote:I can put in a 'calibration' setting for UV like the others...

Hello steve!

In this new release of Cumulus: the "CumulusSetup_beta.v1.9.2_build999", you have add this features?

I do not understand what this means: "- Cater for UV values of 255 from WH3080"

Thank you!

Post by **steve** » Fri 01 Jul 2011 3:59 pm

actioman wrote:
steve wrote:I can put in a 'calibration' setting for UV like the others...
In this new release of Cumulus: the "CumulusSetup_beta.v1.9.2_build999", you have add this features?

No, I was just fixing the bug.

I do not understand what this means: "- Cater for UV values of 255 from WH3080"

It means the other bit that you've just quoted; the bit about losing contact with the UV sensor.

actioman · Post by **actioman** » Fri 01 Jul 2011 4:06 pm

steve wrote:
actioman wrote:
steve wrote:I can put in a 'calibration' setting for UV like the others...
In this new release of Cumulus: the "CumulusSetup_beta.v1.9.2_build999", you have add this features?
No, I was just fixing the bug.

I do not understand what this means: "- Cater for UV values of 255 from WH3080"
It means the other bit that you've just quoted; the bit about losing contact with the UV sensor.

Ok, Thanks again!

I will continue waiting for this functionality ('calibration' setting for UV). Until then, the station is just in test, because the UV values read are too high (at least 4 UV above the real ones).

Post by **steve** » Fri 01 Jul 2011 4:15 pm

Do you think it needs a 'multiplier' setting as well as an offset? I'm thinking a multiplier probably doesn't make much sense for UV index, but I could be wrong...

mcrossley · Post by **mcrossley** » Fri 01 Jul 2011 4:16 pm

or stick a bit of tape over part of the sensor

Post by **steve** » Fri 01 Jul 2011 6:50 pm

mcrossley wrote:or stick a bit of tape over part of the sensor

Indeed. I have to say I'm not convinced of the need for this, or the validity of assuming that other nearby stations have the correct values, but it's easy enough to add, and I've long since given up trying to do only things that I think are correct

Cumulus Support

WH3080 solar readings

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