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Spikes from normal senser data to zero

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PaulMy
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Spikes from normal senser data to zero

Post by PaulMy » Tue 18 Mar 2014 3:14 pm

Hi Mark,
I wasn't sure if I should post here or in Cumulus Davis but since it doesn't show on any Cumulus data I will post here.
In looking at the charts I occasionally see the 1 to 2C spike in temperature and then also in humidity and this is not a concern and may be a sensor issue.

However I also see a periodic, once a day or less, very large spike from the current reading in pressure, humidity, inside temp and solar radiation charts to zero (this time not for outside temperature and can't recall if in the past the large spikes where also for outside temperature). My current observation shows the current spike was at about 9:45 am, but they have varied to different time of day in the past, and can be seen here http://www.komokaweather.com/weather/gr ... rtrait.htm These spikes do not show in the Cumulus data records as far as I can see, nor have I seen them in any of the Cumulus trends. I understand that all the CRTDG data comes from the Cumulus uploaded realtime.txt but since the spike is only shown after the fact I can't check the realtime.txt file if there might have been something recorded in it.

Any thoughts what could be causing this, or has anyone else reported seeing this?

Thanks,
Paul

mm23
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Re: Spikes from normal senser data to zero

Post by mm23 » Sun 30 Mar 2014 8:27 pm

Happen to me few times but not in the Grabber. Possible it is connected to the power failure, shutdown applications..... Can you remember whether it was some kind of your action could result something like this?
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steve
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Re: Spikes from normal senser data to zero

Post by steve » Sun 30 Mar 2014 8:51 pm

I suspect that this is not a problem with data from the station, but a problem reading realtime.txt from the server. Perhaps if CRTDG is unable to read the data from the file, it uses a value of zero for the data (intentionally or otherwise)?
Steve

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PaulMy
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Re: Spikes from normal senser data to zero

Post by PaulMy » Sun 30 Mar 2014 8:58 pm

I have not recently observed another similar spike to zero and at the time of my initial post there was nothing abnormal that I recall.

Paul

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