OpenSprinkler › Forums › OpenSprinkler Unified Firmware › Weather Adjustment Questions › Reply To: Weather Adjustment Questions
February 5, 2015 at 1:05 am #35498
You can find a complete description of Zimmerman’s algorithm on the support document page, specifically this page:
1) Zimmerman’s algorithm computes a watering percentage — a scaling factor that is multiplied with the user-set program water time. So it adjusts the duration and not frequency.
2) The baseline is set by the user — the user decides how long to water assuming average weather condition.