Technical information
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0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
Total Mean ET ADD
13. Next, select SPACING. If no informaon is available for
the spacing select preset. If preset is selected, it will
calculate irrigaon me using predetermined spacing.
When nished, download the new informaon. The
UPDATE SUCCESSFUL message appears conrming that
the controller accepted the new informaon and the
SELECT VALVE screen appears again. Repeat the steps for
the second valve.
Steps the controller uses to calculate irrigaon me
based on ET:
Step 1: Reference daily ETo: provided by the weather
staons
Step 2: Finding the landscape coecient (Kl) (handset
seng)
Step 3: Finding the ET rate for specic landscape plants
(ETl) when two factors are known: Kl and ETo
(controller)
Step 4: Calculang the system precipitaon rate based
on informaon the user provided (controller)
Step 5: Calculang the total me to apply per day
based on precipitaon rate and landscape
Evapotranspiraon in inches per day (controller)
Step 6: Calculang the depth of irrigaon to apply
(controller)
Step 7: Calculang allowable depleon (controller)
Step 8: Calculang irrigaon intervals based on allowable
depleons (controller)
Step 9: Calculang total irrigaon me per day needed
based on allowable depleon (controller)
Step 10: Calculang maximum duraon allows taking into
account basic intake rate (controller)
Step 11: Calculang total number of cycle run mes per
day if needed (controller)
Detailed steps used with the LEIT RC2ET handset to
acvate evapotranspiraon (ET):
1. In the ENVIRONMENT Menu screen highlight the ET
MONITOR icon.
2. SELECT VALVE screen appears with valve 1 and 2.
Select a valve.
3. CONNECTED and then ET MONITOR screen appears
with ET INACTIVE blinking. Change
INACTIVE to ACTIVE.
4. Next, ET MONITOR screen appears with NEW or
MATURE blinking. Select one of the plant
stage of life opons.
5. Next, select SOIL TYPE. Select the soil type for the
indicated valve (refer to How to Determine
Soil Texture).
6. Next, select PLANT CATEGORY. Select from MIX
PLANTING to ANNUALS.
7. Next, select PLANT DENSITY. Select from 10-30% to
70-100% of plant density.
8. Next, select MICROCLIMATE. Select from OPEN SPACE
to FULL SHADE.
9. Next, select SLOPE %. Select from 0%–4% to 13%–
20%.
10. Next, select IRR. METHOD. Select from DRIP EMITTER,
DRIP LINE, to ROTOR.
11. Next, select IRR. EFFICIENCY. Irrigaon eciency is set
with a recommended default seng for each category
but the user can adjust this seng up or down. If
eciency is set higher, irrigaon me will be lower, if
eciency is set lower, irrigaon me will be higher.
12. Next, select FLOW RATE. If no informaon is available
for the ow select preset. If preset is selected, it will
calculate irrigaon me using a predetermined ow
rate.
Example using daily ET in June (AZ):