Hom much water does it take to tip the rain buckets in the VP2? (FAQ)
The tipping buckets should tip at the following points.
If the unit is a US version the spoons should tip at or about, 5.41ml
If the unit is a Metric version the spoons should tip at or about, 4.3ml
We do NOT recommend calibrate using this number. This is strictly provided for knowledge reasons for the scientific community.