Accuracy and the RG-11:
Please note the RG-11 is not as accurate as a properly maintained Tipping Bucket, but a better choice for many applications.
We do not guarantee or specify an accuracy for the RG-11, but these are the results we have seen for our three testing stations:
- Cumulative Error for the three stations: -10% to -28%
- Standard Deviation of error for each rain event: 36%
So, long term, expect the current revision of software to read about 10 to 28% low.
The standard deviation means that roughly 2/3 of the time the RG-11 will be within 36% of the tipping bucket. Much of the time the RG will read close to the tipping bucket, but outlier events can be significantly off.
Data taken between October 2011 and November 2012. Software revision – 12 (current is 16, but does not change accuracy). Units for testing range between new and three years of weathering and wear, including tests with intentionally scuffed / excessively worn units.
Snow melt is not included in the totals. Percent error for rain events is for events over 0.02" accumulation. (Tipping bucket does not register below about 0.02")
There is not a clear correlation of any readily measurable parameter. The biggest factor is surface condition.
clear correlation of any readily measurable parameter. The biggest factor is surface condition.