Topic: Two month old VP2 humidity sensor intermittent drop outs

[Swede]

My new VP2 has been in service since February 18th. Within the past month, have noticed loss of humidity data for around 20 -30 minutes, randomly several times a week. After the interruption, it returns to normal.

Is this a clean the connection first step, then call Davis? Seems kind odd for the humidity sensor to crap out this quickly.

[NK7Z]

I just ordered a replacement temp/humidity sensor for my 10 year old station...  I will be changing out the old one once it arrives.  I will post if there are issues.

[W Thomas]

I’ve gotta do the same thing here. Mine reads fine until the humidity rises like during rain then it reads a big fat 0. I’ve tried removing and re-soldering the sensor. If I could find that older variation sensor the fix would quick and simple.

[Mattk]

.... Is this a clean the connection first step, then call Davis? Seems kind odd for the humidity sensor to crap out this quickly.

Yes it is odd for a new station but like all things there is a failure rate, nothing is 100% perfect and humidity sensors do have issues in bad environments. If it's a moisture/humidity/temperature issue then this might become evident observing when the issue occurs over a time frame.     

But yeah clean/check the ISS socket & fully re-seat cable jack a few times and check for any signs of moisture. Don't worry if there is some form of dielectric grease on the contacts, that can be normal.   

[NK7Z]

Is there a difference in the old sensors, and the new sensors?  I believe I saw something about a humidity correcting needing to be applied.  My replacement sensor should be here in a week or so.

[NK7Z]

I just ordered a replacement temp/humidity sensor for my 10 year old station...  I will be changing out the old one once it arrives.  I will post if there are issues.

Got the sensor, and installed it.  Cleaned up the station as well...  All working again!  Thanks for the help...

[Mattk]

Is there a difference in the old sensors, and the new sensors?  I believe I saw something about a humidity correcting needing to be applied.  My replacement sensor should be here in a week or so.

Not aware of Humidity corrections but new sensors can require additional temperature offsets depending on the station combination?

[NK7Z]

Hi,
Thanks for that info, anyplace with more info on this?

[davidmc36]

https://www.manula.com/manuals/pws/davis-kb/1/en/topic/temperature-humidity-general

[Mattk]

You can also search some info on "SHT31 sensor" etc

https://www.wxforum.net/index.php?topic=33618.msg341593;topicseen#msg341593

[NK7Z]

Thanks for that as well!!  I am now aware of what offset I need, thanks to both of you!

[NK7Z]

https://www.manula.com/manuals/pws/davis-kb/1/en/topic/temperature-humidity-general

Thanks!!!