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Rain calibration
Posted: Fri 15 Jan 2021 6:19 pm
by rich_c
My rain amount is reading to high using Davis WLL with cumulusmx by 10 percent, compared to my manual rain gauge, using the Davis weather link software i can put offset in. can i do this in cumulusmx using the rain multiplier and would this be a negative value ?
Thanks
Re: Rain calibration
Posted: Fri 15 Jan 2021 7:49 pm
by PaulMy
Hi,
Yes, CumulusMX Settings has a Calibration section which includes a Multiplier and Spike removal for rain.
To increase the rain from the station by 10% use Multiplier 1.10
Enjoy,
Paul
Re: Rain calibration
Posted: Fri 15 Jan 2021 8:30 pm
by rich_c
PaulMy thanks for reply
Re: Rain calibration
Posted: Sat 16 Jan 2021 12:14 am
by mcrossley
Though it would be better to get your rain gauge calibrated, it's a bit time consuming but not difficult.
Re: Rain calibration
Posted: Sun 17 Jan 2021 3:27 am
by TRB
Apols for hijacking this Rain cal Mark,
But it would be nice to have a multiplier for Indoor Temp to support the existing Offset.
By the way, for years I have been using the Rain multiplier extensively to correct tipping bucket errors.
Re: Rain calibration
Posted: Sun 17 Jan 2021 9:30 am
by AllyCat
Hi,
rich_c wrote: ↑Fri 15 Jan 2021 6:19 pm
My rain amount is reading to high...... using the rain multiplier would this be a negative value ?
No, if it is
reading too high by 10% then you need to use a "fractional" multiplier, i.e. 0.9 , not negative (unless the rain is falling upwards). Or to be pedantic, it's 100 / 110 which is nearer to 0.91 .
Cheers, Alan.