Author Topic: RainWise 111 Gauge under reporting rain  (Read 466 times)

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Offline jgentry

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RainWise 111 Gauge under reporting rain
« on: May 29, 2018, 05:00:59 PM »
Hey Gang,

Iíve noticed that my RainWise 111 gauge has been under reporting rainfall totals during light rainy conditions. Iím using my CoCoRAHS gauge as the ďstandard.Ē As Alberto came through central Alabama, my CoCoRAHS gauge reported a total of 3.79Ē whereas my RW gauge recorded 3.48Ē. Iím curious to what could be causing this? When I ďadjustĒ the rain readings on the gauge to match up with my CoCoRAHS, the RW reports all the tips just fine.
Davis Vantage Pro2. SHT 31. 24hr FARS. WU: KXALJEMI2 & KALTHORS2 CWOP: C6353 & C6358

  

Offline ValentineWeather

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Re: RainWise 111 Gauge under reporting rain
« Reply #1 on: May 29, 2018, 05:39:06 PM »
Slightly out of calibration.  Start by turning screws 1/2 tun out (on tipper screws) making them taller and tipper easier to tip...Do both equally. Tipping buckets are rarely perfect because of varying rain rates, Idea is find that happy medium somewhere around +/- 3% sweet spot.
Randy

Offline jgentry

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Re: RainWise 111 Gauge under reporting rain
« Reply #2 on: May 29, 2018, 05:49:27 PM »
Thanks! I am surprised how quickly the gauge needs calibration. When I first had the RW gauge installed late last year, it reported around the same or a tad more than CoCoRAHS.
Davis Vantage Pro2. SHT 31. 24hr FARS. WU: KXALJEMI2 & KALTHORS2 CWOP: C6353 & C6358

  

Offline CW2274

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Re: RainWise 111 Gauge under reporting rain
« Reply #3 on: May 29, 2018, 05:52:50 PM »
You can buy a calibrator, or make one yourself, as I did. The RW takes exactly 800ml of water to equal 1" of rain.

Offline ValentineWeather

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Re: RainWise 111 Gauge under reporting rain
« Reply #4 on: May 29, 2018, 06:04:54 PM »
Thanks! I am surprised how quickly the gauge needs calibration. When I first had the RW gauge installed late last year, it reported around the same or a tad more than CoCoRAHS.

My 2 gauges have been pretty good but a yearly tweak with moving parts isn't abnormal.

You may try 3/4 turn since you are about 9% low at slow rain rate. Theoretically will increase tips around 11 for 3.7" rainfall would of made you real close.
Randy

Offline CW2274

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Re: RainWise 111 Gauge under reporting rain
« Reply #5 on: May 29, 2018, 06:10:48 PM »
Thanks! I am surprised how quickly the gauge needs calibration. When I first had the RW gauge installed late last year, it reported around the same or a tad more than CoCoRAHS.
You may try 3/4 turn since you are about 9% low at slow rain rate. Theoretically will increase tips around 11 for 3.7" rainfall would of made you real close.
Or....as with Weatherlink, you can simply go to the calibration page and dial in whatever correction factor you want. Don't know if the console is capable of this or not.

Offline ValentineWeather

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Re: RainWise 111 Gauge under reporting rain
« Reply #6 on: May 29, 2018, 06:16:11 PM »
Yes and something I forgot about. Double check gauge level first thing. That could be the culprit especially this way...
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Randy

Offline jgentry

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Re: RainWise 111 Gauge under reporting rain
« Reply #7 on: May 29, 2018, 08:17:05 PM »
The gauge looks fairly level to me...
Davis Vantage Pro2. SHT 31. 24hr FARS. WU: KXALJEMI2 & KALTHORS2 CWOP: C6353 & C6358

  

Offline jgentry

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Re: RainWise 111 Gauge under reporting rain
« Reply #8 on: May 29, 2018, 08:18:40 PM »
The next question is does my screws look level or not?
Davis Vantage Pro2. SHT 31. 24hr FARS. WU: KXALJEMI2 & KALTHORS2 CWOP: C6353 & C6358

  

Offline CW2274

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Re: RainWise 111 Gauge under reporting rain
« Reply #9 on: May 29, 2018, 08:53:41 PM »
The gauge looks fairly level to me...
Not even close. Remember, this is water, it takes nothing to make it move with gravity.
Don't use the top portion of the rain cone collectors for leveling, they might not possibly be the same height, use the base. And lets get the bubble centered better than that....

Offline ValentineWeather

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Re: RainWise 111 Gauge under reporting rain
« Reply #10 on: May 29, 2018, 08:57:08 PM »
The gauge looks fairly level to me...

Humm, it looks unlevel to me.. 1/4 bubble off or so which is a lot. 

I checked my level and its dead center.

That was my level when I first started working in 1973 so it looks rough...
« Last Edit: May 29, 2018, 08:58:50 PM by ValentineWeather »
Randy

Offline jgentry

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Re: RainWise 111 Gauge under reporting rain
« Reply #11 on: June 02, 2018, 07:23:14 PM »
Thanks guys! Itís off some and isnít perfect but with this current set up, itís the best I can do. However, I did raised the screws up a fairly good bit and hoping it will offset any issues that arises due to the gauge not being perfectly level. I might be wishy washy with this. lol

Here is a picture of the level on the base of the gauge.
Davis Vantage Pro2. SHT 31. 24hr FARS. WU: KXALJEMI2 & KALTHORS2 CWOP: C6353 & C6358

  

Offline CW2274

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Re: RainWise 111 Gauge under reporting rain
« Reply #12 on: June 02, 2018, 08:13:16 PM »
Thanks guys! Itís off some and isnít perfect but with this current set up, itís the best I can do. However, I did raised the screws up a fairly good bit and hoping it will offset any issues that arises due to the gauge not being perfectly level. I might be wishy washy with this. lol

Here is a picture of the level on the base of the gauge.
It's still pretty bad. You'll never truly give your tipper a chance to be accurate as it can be until you level it out better than that, adjusting screws or not. I simply used washers to level mine.

Offline jgentry

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Re: RainWise 111 Gauge under reporting rain
« Reply #13 on: June 24, 2018, 06:09:54 PM »
Was able to get a few rain/storms events with varying rain rates after I did what I did. So far, the rain measurement difference has only been +/-.01" between the RW and manual gauge. Sometimes they have read the same. Hopefully that means I won't have any issues in the near future.
Davis Vantage Pro2. SHT 31. 24hr FARS. WU: KXALJEMI2 & KALTHORS2 CWOP: C6353 & C6358

  

Offline jgentry

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Re: RainWise 111 Gauge under reporting rain
« Reply #14 on: July 06, 2018, 08:52:03 PM »
Had a good rain today and my adjusted RW had 1.38Ē and my CoCoRaHS gauge had 1.33Ē

Itís been working good so far.
Davis Vantage Pro2. SHT 31. 24hr FARS. WU: KXALJEMI2 & KALTHORS2 CWOP: C6353 & C6358

  

Offline ValentineWeather

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Re: RainWise 111 Gauge under reporting rain
« Reply #15 on: July 06, 2018, 09:05:05 PM »
I shoot for +/- .03 per inch of rain on tipping bucket vs NWS standard 8" or Cocorahs 4". The 8" usually records little more .01 vs Cocorahs so you are very close.
Randy

 

anything