Author Topic: Rain Gauge Increments  (Read 359 times)

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Offline AntHraX

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Rain Gauge Increments
« on: April 01, 2024, 04:43:03 AM »
Is There a reason my rain gauge increments in odd numbers?
Like Today.....
01/04/24   18:57   4.4
01/04/24   18:58   4.4
01/04/24   19:10   4.6
01/04/24   19:11   4.6
01/04/24   19:12   4.9
01/04/24   19:13   4.9
01/04/24   19:27   5.1
01/04/24   19:28   5.3

or is this normal on a gw1000?

Thanks  :grin:

Offline Mattk

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Re: Rain Gauge Increments
« Reply #1 on: April 01, 2024, 05:14:41 AM »
Typical of say an imperial gauge converted to metric and rounded to 1 decimal

Offline jantoni

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Re: Rain Gauge Increments
« Reply #2 on: April 02, 2024, 02:33:25 PM »
Is There a reason my rain gauge increments in odd numbers?
Like Today.....
01/04/24   18:57   4.4
01/04/24   18:58   4.4
01/04/24   19:10   4.6
01/04/24   19:11   4.6
01/04/24   19:12   4.9
01/04/24   19:13   4.9
01/04/24   19:27   5.1
01/04/24   19:28   5.3

or is this normal on a gw1000?

Thanks  :grin:

The capacity of the rain gauge is 2.54mm, so the steps are 0.2mm, then 0.3mm, then 0.2mm and so on
Davis Vantage Vue
GW1000
WH2650
WH65
3 x WH31 + WH32
WH41 air quality sensor

Offline AntHraX

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Re: Rain Gauge Increments
« Reply #3 on: April 02, 2024, 04:53:38 PM »
ok, Cheers  [tup]

Offline Gyvate

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Re: Rain Gauge Increments
« Reply #4 on: April 03, 2024, 03:39:34 PM »
Is There a reason my rain gauge increments in odd numbers?
Like Today.....
01/04/24   18:57   4.4
01/04/24   18:58   4.4
01/04/24   19:10   4.6
01/04/24   19:11   4.6
01/04/24   19:12   4.9
01/04/24   19:13   4.9
01/04/24   19:27   5.1
01/04/24   19:28   5.3

or is this normal on a gw1000?

Thanks  :grin:

The capacity of the rain gauge is 2.54mm, so the steps are 0.2mm, then 0.3mm, then 0.2mm and so on
in principle the increments are as described above 0.2 and 0.3 to compensate for the 0.054 mm from the 0.254 mm rainfall (corresponding to one bucket tip), which the consoles don't display (only one digit after the decimal point is shown) - for a WS69/WH65 - for a WH40 it would be 0.1014 mm per tip.

However, if the rain rates are higher, the increments may be multiples i.e. 0.5, 0.8 ....

Afaik the 0.04 are also added and at some point in time there may be two subsequent 0.3 mm readings - can only be noticed when the rainfall is long enough (time-wise and quantity-wise) - or it gets "lost" (the visibility, not the count) during longer time strong rainfalls - might be a 0.5 and a 0.6 count ...

also even numbers can therefore occur - your first two readings were an even number though  ;)
« Last Edit: April 03, 2024, 03:43:47 PM by Gyvate »
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