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Relative Humidity almost always 99%

Discussion specific to Fine Offset and similar rebadged weather stations
NarrowAcres
Posts: 7
Joined: Sun 12 Sep 2010 10:56 pm
Weather Station: 265NC National Geographic
Operating System: Windsow XP SP3

Relative Humidity almost always 99%

Post by NarrowAcres »

Maybe someone can help me. My weather station (National Geographic 265NC) almost always displays 99% relative humidity. I know this can't be the case as other stations around me are reporting lower RH.
I've only had it set up a few days in a temp. location that was only a foot off the ground, I thought that might have cause humid conditions because of the grass, so I raised it to about 6 feet, but no change in RH.
Thought?
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steve
Cumulus Author
Posts: 26702
Joined: Mon 02 Jun 2008 6:49 pm
Weather Station: None
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Location: Vienne, France
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Re: Relative Humidity almost always 99%

Post by steve »

What figures are the stations around you reporting? If you're certain that it's reading far too high, then it's most likely a faulty sensor, I think.
Steve
NarrowAcres
Posts: 7
Joined: Sun 12 Sep 2010 10:56 pm
Weather Station: 265NC National Geographic
Operating System: Windsow XP SP3

Re: Relative Humidity almost always 99%

Post by NarrowAcres »

Looking at locations near me on wundermap, the 3 closest to me are at 73, 73 and 48 %
This is my Station on wunderground http://www.wunderground.com/swf/Rapid_F ... =IONESSEX2
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steve
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Re: Relative Humidity almost always 99%

Post by steve »

That definitely looks like a faulty sensor to me.
Steve
Gina
Posts: 1885
Joined: Sat 21 Feb 2009 12:41 pm
Weather Station: Nothing working ATM - making one
Operating System: OS X, Linux Mint, Win7 & XP
Location: Devon UK

Re: Relative Humidity almost always 99%

Post by Gina »

My humidity sensor was showing 99% most of the time until I took the unit out of the near useless screen provided and put it in a much bigger Stevenson screen. Now, although 99% is common, it does go down to 60% ish at times of dry weather and a breeze.
Gina

Sorry, no banner - weather station out of action. Hoping to be up and running with a new home-made one soon.
apenwith
Posts: 418
Joined: Sun 26 Apr 2009 7:30 pm
Weather Station: w8681 BlakeLarsen Sun Recorder
Operating System: Windows 7 SP1
Location: West Cornwall UK
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Re: Relative Humidity almost always 99%

Post by apenwith »

Hi
I was getting 99% pretty much all of the time but I had to replace the transmitter for other reasons and the new one in exactly the same location/screen etc behaved more or less normally - so I would say - faulty unit.
Regards
Alan
NarrowAcres
Posts: 7
Joined: Sun 12 Sep 2010 10:56 pm
Weather Station: 265NC National Geographic
Operating System: Windsow XP SP3

Re: Relative Humidity almost always 99%

Post by NarrowAcres »

I spoke with a Thermor rep. at the Home Hardware Show and they told me it was a faulty monitor unit. It's not receiving the radio signal correctly from the outside unit. It's a known issue with the 265. I'm to contact customer service tomorrow and they will send me a new unit by mail.
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steve
Cumulus Author
Posts: 26702
Joined: Mon 02 Jun 2008 6:49 pm
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Location: Vienne, France
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Re: Relative Humidity almost always 99%

Post by steve »

NarrowAcres wrote:I spoke with a Thermor rep. at the Home Hardware Show and they told me it was a faulty monitor unit. It's not receiving the radio signal correctly from the outside unit. It's a known issue with the 265. I'm to contact customer service tomorrow and they will send me a new unit by mail.
Well, I guess they ought to know, but that doesn't sound right to me. If you're getting all of the other outside measurements correctly - which I assume you are, or you would have mentioned it - then I don't see how it can be a problem with radio reception. But I don't know anything about the radio transmission protocol on these things, so perhaps all of the data isn't sent together. But I guess you'll soon know one way or the other!
Steve
NarrowAcres
Posts: 7
Joined: Sun 12 Sep 2010 10:56 pm
Weather Station: 265NC National Geographic
Operating System: Windsow XP SP3

Re: Relative Humidity almost always 99%

Post by NarrowAcres »

steve wrote:Well, I guess they ought to know, but that doesn't sound right to me. If you're getting all of the other outside measurements correctly - which I assume you are, or you would have mentioned it - then I don't see how it can be a problem with radio reception. But I don't know anything about the radio transmission protocol on these things, so perhaps all of the data isn't sent together. But I guess you'll soon know one way or the other!
Yeah, I thought the same thing, it must be one of the sensors outside, but as soon as I said my outside RH was 99%, she was saying, "oh, it's the touch screen monitor."
Calling them now...
NarrowAcres
Posts: 7
Joined: Sun 12 Sep 2010 10:56 pm
Weather Station: 265NC National Geographic
Operating System: Windsow XP SP3

Re: Relative Humidity almost always 99%

Post by NarrowAcres »

Wow, I'm impressed. I called and the lady I spoke with said, "Oh, I was told you were going to be calling us. Just give us your information and we'll mail you out a new unit right away."
Fast, friendly service. Kudos to Thermor. I should get the new monitor early next week and hopefully my RH problem is solved.
DrMD
Posts: 21
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Weather Station: NC265
Operating System: XP
Location: Goshen Nova Scotia Canada
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Re: Relative Humidity almost always 99%

Post by DrMD »

If your problem is the same as mine replacing the consule will not help you.
Try unplugging the anemometer for a little while and see if the RH goes to something
more reasonable.
If that works for you then I wish I could offer you more help but I still have the problem
myself.
Gina
Posts: 1885
Joined: Sat 21 Feb 2009 12:41 pm
Weather Station: Nothing working ATM - making one
Operating System: OS X, Linux Mint, Win7 & XP
Location: Devon UK

Re: Relative Humidity almost always 99%

Post by Gina »

I think my humidity sensor has gone wrong this morning. A sudden drop. I'll have to investigate. Fortunately I have a spare tx/temp/humidity unit. Humidity plot attached...
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Gina

Sorry, no banner - weather station out of action. Hoping to be up and running with a new home-made one soon.
Gina
Posts: 1885
Joined: Sat 21 Feb 2009 12:41 pm
Weather Station: Nothing working ATM - making one
Operating System: OS X, Linux Mint, Win7 & XP
Location: Devon UK

Re: Relative Humidity almost always 99%

Post by Gina »

Strangely, it seems to have returned to normal.
24hrs-Humidity.png
Anyone have any idea of what could have caused that strange drop in readings?
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Gina

Sorry, no banner - weather station out of action. Hoping to be up and running with a new home-made one soon.
Charlie
Posts: 363
Joined: Thu 04 Feb 2010 12:22 pm
Weather Station: 1wire-Cumulus & Fine Offset
Operating System: Windows 7
Location: Whitehorse, Yukon Territory, Canada

Re: Relative Humidity almost always 99%

Post by Charlie »

I have seen something similar when changing the batteries - almost like it has an initial value and then integrates many readings to build a "correct" answer over time. No power interruptions to the sensor unit that you are aware of?
Gina
Posts: 1885
Joined: Sat 21 Feb 2009 12:41 pm
Weather Station: Nothing working ATM - making one
Operating System: OS X, Linux Mint, Win7 & XP
Location: Devon UK

Re: Relative Humidity almost always 99%

Post by Gina »

I haven't touched the tx unit for some time other than to disconnect and reconnect the rain gauge. But that wasn't during the trouble period or even that day. I think I'm going to have to bring the unit indoors again and give it a good looking at. I have the temperature spikes back as well - for a week or so now.
Gina

Sorry, no banner - weather station out of action. Hoping to be up and running with a new home-made one soon.
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