99% humidity ??

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I purchased the 06007rm & 06004rm setup a week ago.  I live in Dallas/Fort Worth area.  The 5in1 sensor is on a pole out in the yard about 6 feet off the ground.  Every morning at 6:00am when I look at the display the humidity is 99%.   After the sun hits the 5in1 sensor the humidity starts to decrease.  I have 3 other temperature/humidity sensors (ranging from 20% to 50% over the last week) and they have been close to our local airport and three other weather reporting stations (within 2 miles of me).  It seems that the 5in1 sensor has a leak that is allowing condensation to drip/collect on the sensor or the system has a design flaw.
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Scott

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Posted 3 years ago

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AcuRite Kevin

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Hi Scott,

Checking historical data on Weather Underground for your area, reported highs for humidity over the last week have shown 99% for many days over the last week; on the days it did not hit 99%, it was well over 75%.  Looking at the charting relating temperature and dew point at 6am for each day, seeing a reading of 99% does not surprise me.  After sunrise each day, humidity appears to drop off rapidly as well.  It appears your unit is tracking correctly in relation to those other reporting stations in that area.  If, however, you find the unit is leaking condensation into the sensor, please contact the Customer Support Center at 877-221-1252 to arrange for warranty coverage. 
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Scott

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Dont know how you read that.    From the link 
http://www.wunderground.com/history/airport/KGKY/2016/1/7/CustomHistory.html?dayend=14&monthend=...=
the humidity between the 7th and 14th has been two 97%, one 90%, one 89%, two 82%, one 79% and one 76%.   ???
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Harold Ashe, Champion

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Just wondering...if you go outside around 6:00 am, does everything (grass, lawn furniture, etc,) feel wet or damp?  The reason I ask is that it's what I get nearly every morning around the same time and, as you describe, it "burns off" when the sun hits it for a couple of hours.
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AcuRite Kevin

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Scott,

I was reading that from a number of different reporting stations in your area.  Harold makes a good point; do you find dew on the ground around that period?  If so, that is likely what is causing the 99% reading at that time. 
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Scott

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Most of the time when it reads 99% there is dew on the ground but sometimes it reads 99% when there is no dew on the ground.   I have started to keep a log of the temp/humidity readings and comparing it with KGKY airport data and other reporting stations within 2 miles of myself.  So far half of the time it is outside of a 5% tolerance and a quarter of the time it is outside of a 10% tolerance with these other stations.   The other stations have been within a 5% tolerance of each other.
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AcuRite Crystal

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Hi Scott,

Is there any other body of water near by that could be causing that reading such as a pool or lake?  If you relocate the sensor, does it still show that same reading in the mornings?
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Scott

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No body of water with 5 miles.   I have relocated the sensor once.  Since the initial post I have not seen anymore 99% humidity but it does tend to read 10% to 20% higher than any other of the 4 stations I mentioned in the original post.
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AcuRite Kevin

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Hi Scott,

At this point, we would recommend monitoring it in the new sensor location to see if it begins to track more closely over the next few weeks.  Should it not, you may wish to call Customer Support at 877-221-1252 to arrange for a Return Authorization of the sensor so we can test and inspect it to determine if it is reading correctly. 

You may also wish to perform a reset on the system, ensuring you are using suggested batteries and changing the ABC switch, to rule out any interference you may be getting between the sensor and display.  Before proceeding with the reset, please check your batteries. We recommend that the batteries meet the following criteria:

• Verify you are using standard alkaline batteries such as Rayovac or Energizer. Lithium batteries can be used in the outdoor sensor if you are in a location that will frequently see temperatures below -4oF/-20oC. (Rechargeable batteries, as well as batteries that indicate a heavy-duty quality are not recommended, and may cause irregularities.)
• Verify that you are using a fresh set of batteries. The battery expiration date should be at least 6 years out. Batteries can lose 3% of their power or more every year in storage.

1. Bring both the sensor and display unit indoors and position them side by side.

2. Remove all batteries from both the sensor and the display unit. (If the display has an AC adapter, please unplug this, as well, to completely power down the unit.)

3. Locate the A-B-C ID switch inside each battery compartment. Make sure that the two parts are set to the same position. Please change both parts to the next available letter on the ID switch, as this can help to reset the unit.

4. Reinstall batteries in outdoor sensor first.

5. Reinstall batteries (and/or reconnect AC adapter) to the display last.

6. Let both sensor and display sit side by side to establish connection. (Leaving the devices side by side for 30 minutes will allow you to verify accuracy by comparing the indoor and outdoor readings shown on the display. For accuracy standards, please visit http://www.acurite.com/accuracy.)
 
7. After a connection has been established, the sensor can be placed outdoors.
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Scott

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I did the reset on the system as you described above 5 days ago after calling support.   Still having the tolerance issue as described above.
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AcuRite Kevin

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Scott,

At this point, you may wish to contact Customer Support to arrange for a Return Authorization so we can test your sensor.  Please call 877-221-1252 to arrange for this testing.