Month rainfall tally

[Alan]

Hi,
The following incident occurred over a 3 day period and has me intrigued but not concerned. I hope somebody will be able to explain it.

July 9, first rain for the month 2.0mm, monthly tally also reported 2.0mm --- all's well.
July 10, further rain fall of 0.3mm, monthly tally 2.4mm --- not so well (it stayed that way until turn off that night).
July 11, no more rain but upon system turn on the monthly tally corrected to 2.3mm --- .

I did not notice but I assume that the same thing happened to the yearly tally.

There is a 1.12 multiplier applied in the calibration section (maybe this has some play, don't really know!).

In all events, interesting. Hope somebody can throw some light.

Cheers!
Alan

[uncle_bob]

If you're worrying about this, then relax.
Because these Fine offsets are going to cause you to pull hair if you worry about the little stuff.

[steve]

It's because of rounding: 0.3 * 1.12 = 0.336, so each tip for you is not a whole multiple of a tenth of a mm. On restart, Cumulus recalculates the monthly and annual totals from the daily totals in dayfile.txt, which have already been rounded.