Fine offset WH-1080 Rain guage MOD

[pacificblue03]

I realize there is a topic on this but i do not follow: ___https://cumulus.hosiene.co.uk/viewtopic.php?f=16&t=1307___

I have a Fine offset WH-1080 and the other week we had a huge 30mm dump but the Airport readings 30seconds away called 60.3mm i think that the Heavy rain is bouncing out and light rain wont slide in.

i am looking for a mod using a funnel with specific diameter and measurements needed to modify my station to not over read (too much) in a deluge and to be able to read quick light showers which happen very often even today 0.8mm at the airport 0mm on mine.

Much help would be awesome

Thanks

Antonio.

[Synewave]

I realize there is a topic on this but i do not follow: ___https://cumulus.hosiene.co.uk/viewtopic.php?f=16&t=1307___

If you can't follow this one above, there are plenty of other threads, try this one:

https://cumulus.hosiene.co.uk/viewtopic.php?f=16&t=3366

I don't think anyone will start a new thread on this topic since there is already plenty of information in this forum.

[pacificblue03]

that was not helpful even though it says 55cm2 catchment area how big is the diameter for that then? all ineed is the diameter size.

antonio.

[tjaliwalpa]

that was not helpful even though it says 55cm2 catchment area how big is the diameter for that then? all ineed is the diameter size.

antonio.

­¶r²=55cm²
Therefore radius=4.18cm or diameter=8.37cm

But, when using Cumulus, the size of the funnel is not critical as a correction can be made within Cumulus. I suggest using a larger funnel as the original collector gives increments of 0.3mm. I have used a larger funnel and this gives me increments of gust over 0.1mm.

Bob

[pacificblue03]

thanks for the information also what sized funnel do you recommend and how to tell cumulus the changes?


Antonio.

[hills]

On your cumulus screen select "configuration" on the top line, then select "calibration". Rainfall is the bottom box on that screen.

I have got pretty accurate results using a rainfall calibration of .35 with a funnel that has a diameter of 138.8mm but others have different results. The best thing to do is buy a manual rain gauge and change the calibration to match the results from the manual gauge over time.