My rain gauge does not tip equally or measure properly. How can I calibrate the rain gauge to resolve any inconsistencies or inaccuracies?
The buckets, or trough, can be calibrated by adjusting the screws located directly below the trough. To access the calibration screws, you will need to remove the outer cover on the rain gauge. To do this, remove the screws on the lower portion of the cover and pull the cover off. Once this cover is removed, you will see the trough, and two white, plastic screws below the trough. The balance of the trough can be adjusted by raising and lowering these screws. When testing for even tipping of the trough, count the number of drops that is needed on each side of the trough before it tips. Once an even number is required on each side, the unit will be calibrated. Even with equal bucket/trough tipping, tipping that occurs too soon or too late will lead to inaccurate measurements. To correct this, you must calibrate the gauge height. The area of the collection funnel is 78.54 square centimeters, which means that 1cm of rainfall equals 78.54 cc of collected water. Since each tip of the bucket
