Greetings all from down in (for the last few days at least!) rainy N. Texas!
We just got our first measurable rain since early January this last week, and I've noticed the rain gauge on my VP2 is off considerably when compared to a graduated glass tube.
First rain event was 2.20" on the VP2, the glass tube was 2.9. 2nd event a day later was 0.77" on the VP2, 1.0 on the tube. The correction factor on the first event works out to 1.32, the second was 1.30, so that's pretty consistent
The VP2 is level in both planes, and was clear of any obstruction when I checked it a few weeks ago (roof mounted). The glass tube is mounted about 75' away.
I did a search on the forum and didn't find anything.
How do I go about calibrating my rain gauge?
TIA, and have a good one,
Mike