OpenSprinkler Forums OpenSprinkler Unified Firmware Trouble with Zimmerman Method Reply To: Trouble with Zimmerman Method

#44003

Steve
Participant

I need help to understand the Zimmerman method in OS. I have done manual calculations on both the “std” default adjustment numbers and my own inserted numbers (I’m on FW 2.1.6 (2)). I am receiving accurate wunderground updates too.

Weather pull:
Min Humidity: 63%
Max Humidity: 97%
Mean Temp: 84.3 F
Precip yesterday and today: 0

on default numbers:
-50% for humidity
+57.2% for temp
0 for rain
Adjusted Watering percentage: 7.2%
What OpenSprinkler calculates: 106%

My real numbers (70 temp, 0 rain, 67 humidity)
-13% for humidity
+57.2% for temp
0 for rain
Adjusted watering percentage: 44.2%
What Opensprinkler calculates: 143%

So does the “adjustment” simply adjust from 100%?

We are currently away till Monday July 21. Orders placed during this time will be shipped on Tuesday July 22. Thank you for your understanding!
This is default text for notification bar