[moolight0551]

(it *really* is raining here in Sydney isn't it ! Lots of wind too !!)

Yes a real test for the sensors. I am getting some really big variations in the wind speed and the watching the rain figures is really interesting. I live down in a valley, can't imagine what the true wind speed figures must be somewhere that is open and ideal for measuring the wind gusts.

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As it has been raining heavily in Sydney Australia today I am getting some rainfall numbers displayed on my Rx unit. I have a couple of questions.

1. My rain bucket from Sparkfun says it tips every .0111 inch or .2794mm of rain. Is this amount the same as expected by the Fine Offset rain gauges and is the calibration multiplier setting in Cumulus of 1.500 correct.. Maybe mine is one, I don't know.

You can use that multiplier for you rain gauge.

2. The Rx TFT display is showing Rain 52.50 mm/m2 and 7.11 Rain F. mm/mm2of rain and now 60.6 and 21.60 respectively. What are these numbers?

The first value is the total rain since the beginning of your meteorological day. The default value is 0 (midnight) but as you live in AU, you may want to change it to 9 (9AM) in RX user config settings (don't forget to set it also on Cumulus)
The second value represents the actual RainFall Rate, it increases or decreases with the rain intensity. You may search on google about the concept of Rainfall rate.

3. After running for around 4 hours Cumulus reports not having any data read and the error light starts flashing. After restarting Cumulus it seems OK again and this has been repeated a few times during the day. Any ideas on what is causing this.(I know this is not the Cumulus forum!)

Please give more info about your Cumulus config, anyway...
Have you set the correct com port on Cumulus?
What happens just after you start Cumulus? Does your RX unit reboot alone?
If it will reboot, that is because you don't have VP1 switch at ON (close) position. It must be ON, before starting Cumulus.
After a reset or boot, wait at least two minutes, before attempt to start Cumulus, or the connection will fail.

Thanks for your information.
I really do need to do a bit more reading on how weather experts measure some of these parameters. Our rain in Australia is just reported as mm but I guess this really means mm/square metres.

As for Cumulus the COM ports is OK, the Nano does not reset when I restart Cumulus as VP1 is on. After operating for some time(Hours) Cumulus error indicator starts flashing and I notice the Last Data Read time has stopped incrementing. I will try to add screenshots of the Cumulus settings but not confident I will get this right.