We ask only two simple, essential questions of homeowners and landscapers for each valve.

  1. Flowers, Lawn or Shrubs?
  2. MAX Runtime?

These are questions that every homeowner can answer. These are questions that even non-English speaking gardeners can quickly learn. Then we ask that these answers by tuned after observing the landscape during the first hot spell or 2. After that tuning, there will be little need to adjust the sprinkler timers as the weather and as the seasons change.

Since our Smart Timers™ calculate new sprinkler timings and watering days every night at 8 PM based on the answers to the 2 questions, an even moisture level is maintained in the soil as the weather changes from summer to winter. The tuning of the base programs during the first hot spell or 2, lets the homeowner or landscaper properly set the watering/moisture LEVEL of the red line in the chart to the right.

The level of the red line can be set high enough to float Noah's ark or low enough to create a desert. But, the beauty of our Smart Timers™ is that homeowners and non-English-speaking gardeners can easily tune the Smart Timers so that the Smart Timers™ AUTOMATICALLY deliver the right amount of water all year....rain or shine!

ANSWER to question #1

"Assign Valves to Flowers™, Lawn™, Shrub™, LWU or Fixed programs."

Purpose: to organize valves into groups of shallow, medium, deep-rooted and California Native plants/cedars so that our proprietary Flowers™, Lawn™, Shrub™ and LWU programs may water these plants differently. The Flowers™ program will water more times per week than the Lawn™ program. The Shrubs™ program will water the fewest times per week. The LWU program is designed to meet the genetic preferences of California Native Plants and cedars which expect little rain from May to October and are often damaged when watered like other plants.

Programming: The photo to the right shows the main dial pointing at "Assign Valves to Flower, Lawn, Shrub, LWU or Fixed programs." The display will flash the program assignment calling attention to itself. The display shows that Valve #3 is in the Shrubs™ program and has 40 minutes as its MAX Runtime.

To change the program assignment, push and hold the NO switch and the display will scroll through the programs. When the display reaches the program that you want for that valve, simply release the NO switch and let the display flash your new choice for that valve.

To go to another valve, simply push and hold either the NEXT or PREVIOUS switch until the number of the desired valve appears.

ANSWER to question #2

"Set MAX Runtime for Valves"

Purpose: To increase of decrease the total amount of water delivered to each zone. Maximum Runtimes may be set 0 to 255 minutes.

Programming: Homeowners should use the Runtime minutes that they have for the hot time of year in their "dumb" timer. Landscapers already know how many minutes per night to run a Rainbird 1820 or other heads. Enter the timing into the "Set MAX Runtime" for each valve.

Our Smart Timers™ will probably water fewer days per week than is set into your "dumb" timers. If landscapes are soggy during normal weather, this combination will often bring the watering into line with the needs of the plants.

During the first hot spells, some tuning of these Runtimes may be required. Your employees may then find a new "favorite" runtime for each head and landscape which they can use with more confidence than they had with "dumb" timers.

Routine maintenance.

"1,2,3 Minute Test"

Purpose: To test that the sprinkler system is operating efficiently.

Accurate WeatherSet recommends that a "1,2,3 Minute Test" be performed every month. This simple and pleasant task on a warm day will allow testing of the sprinkler systems for problems such as

The photo to the right shows the main switch is pointing at the "1,2,3 Minute Test" position. The MORE switch was pushed to the set the test of each valve to 4 minutes. The display shows that valve #1 has already run for 4 minutes and the Smart Timer™ is now running valve #2. The display shows that valve #2 has run for 1 minute and 37 seconds.

When you perform this monthly test, carry a note pad and pruning shears. Prune any plants that have grown to block the spray. Make notes of broken parts or over-spray. To correct over-spray, please see our SprinklerChecklist.

That is all that most homeowners and landscapers need to do to reach effective water management.


If a commercial site has more than 12 valves, an additional step may be used to better fit all the watering into water windows. The Cycle Limit may extend watering beyond the water window.

"Stop RUNOFF - set Cycle Limit"

Purpose: To RUNOFF and erosion by breaking long Runtimes into shorter hourly cycles. The Cycle Limit may be set from 2, 4, 6, 8, 10, 15 or 20 minutes per hour or shut off to allow up to 255 minutes of continuous watering. All controllers are shipped with the Cycle Limit set a 4 minutes per hour which is good for most homeowners.

Shown to the right is the Smart Timer™ with the dial pointing at "Stop RUNOFF-set Cycle Limit" to see/change the Cycle Limit. The Smart Timer™ shows that the valve #3 will run 8 minute per hour up to a maximum of 40 minutes. So the 40 minutes will be spread over 5 hours.

Since it is the Cycle Limit may be changed, the 8 and M will flash once per second calling attention to itself. Pushing the MORE or LESS switches will change to Cycle Limit over its range of 2, 4, 6, 8, 10, 15 or 20 minutes per hour.

Accurate WeatherSet provides a very simple procedure to determine whether the Cycle Limit should be 8 minutes per hour or some other setting. (All WeatherSet Smart Timers™ ship will the cycle limit set at 4 minutes per hour for every valve.) This practical procedure is shown below.

This simple test avoids the complicated inputs required by some ET controllers such as knowing the

Easy programming for effective
landscape water management and healthier plants.
Our Smart Timers™ are like thermostats in homes which automatically adjust (turn-on and turn-off) the heating and cooling equipment to maintain an even temperature. Our Smart Timers™ automatically adjust (turn-on and turn-off) the sprinkler timing to maintain even moisture in the soil. The chart to the below shows this automatic adjustment of sprinkler timing to track the weather from summer to winter.
Factory default settings