For accurate Solar Sync measurements, the controller needs to be programmed for the average peak season ET for your region. Use the table below to determine your region.
The table will assist you in identifying the type of region you live in. There are four basic ET regions, each with descriptions of the region, along with typical ET and temperature characteristics. It is recommended that, if possible, the region be chosen based upon average July ET or peak summer ET (inches/mm per day).
Use the following table for choosing your region (reference below). You can use methods A, B or C to help you choose which region is best for your area:
- A - Based upon the ET of your region using the average July ET or peak summer ET (inches/mm per day). This is the preferred option when selecting your region.
- B - Based upon the temperature for your region using the average July or the driest month high temperature (not the highest temperature for July).
- C - Based upon the general description of your region.
If any of the choices in the rows apply to your situation, then that is your region setting choice.
- A - If the average July ET is < 0.17" (4.3 mm) per day
- B - If the average temperature for July is 65°–75° (18°C – 24°C)
- C - U.S. Northern States / Coastal Regions
- A - If the average July ET is 0.18" – 0.23" (4.6 mm – 5.8 mm) per day
- B - If the average temperature for July is 75° – 85° (24°C – 29°C)
- C - Mountains / U.S. Northern Inland States
- A - If the average July ET is 0.24" – 0.29" (6.1 mm – 7.4 mm) per day
- B - If the average temperature for July is 85° – 95° (29°C – 35°C)
- C - U.S. Southern States / Inland/High Desert
- A - If the average July ET is > 0.30" (7.6 mm) per day
- B - If the average temperature for July is 95° – 105° (35°C – 41°C)
- C - Deserts
* For Southern hemisphere locations, use the month of January.