Author Topic: Testing Rain Gauge Watson 8686 (HP2550 clone)  (Read 433 times)

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Offline etaf

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Testing Rain Gauge Watson 8686 (HP2550 clone)
« on: May 30, 2020, 04:33:31 AM »
I playing with testing the rain sensor on the Watson 8686 PWS Clone of HP2550

The diameter of the rain funnel is 11cm (110mm)
so the capture area (area of a circle) is pi*R*R (PiR2)
3.141 * 55 * 55 = 9503mm2
so using this online calculator
http://www.calctool.org/CALC/other/default/rainfall

0.1L (0.100732L) of water would be about 10.6mm of rain

hopefully worked it all out OK

Its a single bucket , so its never going to be accurate with high rainfall and also if there is less than 0.1 so the bucket does not tip, then that will be an error anyway the accuracy is +/- 10% anyway

hopefully on the right track here

welcome thoughts

Offline etaf

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Re: Testing Rain Gauge Watson 8686 (HP2550 clone)
« Reply #1 on: May 30, 2020, 05:33:32 AM »
Well, that did not really work, i needed to allow the unit bucket to reset and go much slower
7.1 mm recorded

well at least it works

i will think again

Offline galfert

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Re: Testing Rain Gauge Watson 8686 (HP2550 clone)
« Reply #2 on: May 30, 2020, 08:51:15 AM »
I just got a Stratus and compared that way.
Ecowitt GW1000 | Meteobridge on Raspberry Pi
WU: KFLWINTE111  |  PWSweather: KFLWINTE111
CWOP: FW3708  |  AWEKAS: 14814
Windy: pws-f075acbe
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Offline etaf

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Re: Testing Rain Gauge Watson 8686 (HP2550 clone)
« Reply #3 on: May 30, 2020, 09:05:49 AM »
Thanks, whats a stratus

Offline galfert

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Re: Testing Rain Gauge Watson 8686 (HP2550 clone)
« Reply #4 on: May 30, 2020, 09:18:20 AM »
Well a Stratus or CoCoRaHS gauge is what we us in the US with inches. I suppose this will serve you better.
https://www.amazon.co.uk/Capacity-Outback-Professional-Measuring-Mounting/dp/B07W7WDYDC/

« Last Edit: July 24, 2020, 08:40:33 AM by galfert »
Ecowitt GW1000 | Meteobridge on Raspberry Pi
WU: KFLWINTE111  |  PWSweather: KFLWINTE111
CWOP: FW3708  |  AWEKAS: 14814
Windy: pws-f075acbe
Weather Underground Issue Tracking
Tele-Pole

 

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