1. Water conservation By Acclima
Closed-Loop Irrigation Control
Sensor-Based
Precision Irrigation system
by Acclima
Water conservation By Acclima

2. Water conservation By Acclima
Conventional Clock-Based Irrigation Control
Manual Program Entry
Timer Program Execution
Occasional Manual Correction Prompted by Stress or Saturation
Open Loop: No Automatic Feedback to Control Moisture Level
Water conservation By Acclima

3. Water conservation By Acclima
Evapo-Transpiration-Based Irrigation Control
Complex Parametric Input with Regular Adjustment
Weather Station, Computer and Communications Means
ET Enabled Clock
Open Loop: No Automatic Feedback to Control Moisture Level
Water conservation By Acclima

4. Soil Moisture-Based Irrigation Control
One-Time Moisture Threshold Inputs
Feedback-Enabled Automatic Controller
Closed Loop: Automatic Feedback Maintains Proper Root Zone Moisture
Water conservation By Acclima

5. Water conservation By Acclima
Instability – The #1 Problem
Temperature
Non-Digital TDT Moisture Sensors
Water Content
Electrical Conductivity
Sensor Output is a Complex Function of all Three Input Variables
Water conservation By Acclima

6. Water conservation By Acclima
XTra Sensor Stability -- Temperature
Less Than 1% Deviation 25
Reading in % Water 20 1
Temperature in Degrees Celsius 50
Water conservation By Acclima

7. Water conservation By Acclima
XTra Sensor Stability – Electrical Conductivity
Less Than 1% Deviation 25
Reading in % Water 20
2.5
In-Soil EC in dS/m
Water conservation By Acclima

8. Water conservation By Acclima
Increasing Water Content
Saturation Area:
Heavy Nutrient and Water Loss
Root Putrefaction
Field Capacity:
Very Small Percolation Loss
Allowable Depletion Limit
Permanent Wilt Point: (dead grass)
Water conservation By Acclima

9. Water conservation By Acclima
Installing the Sensor – Techniques
Install in representative area for the zone
Avoid depressions
Avoid high-traffic areas
Avoid large rocks, tree roots
Install in healthy turf
Remove a 60cm square turf plug
Install sensor 10cm deep
Re-compact soil around rods to original compaction
Replace turf plug and seal around edges
Connect wires in a nearby value box
Water conservation By Acclima

10. Water conservation By Acclima
Advantages – Water Savings
System Monitors ET in the Root Zone and Applies Just the Right Amount of Water to Hold Moisture in the Target Range
All Weather, Soil and Plant Characteristics are taken into Accurate Account in the Measurements
Upwards of 40% Water Savings can be Expected over a Well-Managed Controller Based System
Water conservation By Acclima

11. Water conservation By Acclima
Advantages – Maintenance Savings
Seasonal Clock Adjustments are Eliminated
System Automatically Accommodates Heavy Rains, Cool Periods, Hot Periods, Dry Winds without Need of Adjustment.
Initial Settings Remain Stable Year after Year
Water conservation By Acclima

12. Water conservation By Acclima
Advantages – Environmental Issues
Ground Water Contamination with Pesticides and Fertilizers is the Result of Over-Watering Crops and Turf.
Enormous Reductions in Fertilizer and Pesticide Applications are Possible with Precision Irrigation. Eastern Oregon Onion Fields show 50% Reduction.
Water conservation By Acclima

13. Water conservation By Acclima
Advantages – Healthier Landscape
Over-Watering Drives Oxygen out of the Soil and Putrefies Roots
Over-Watering Leaches Nutrients and Pesticides from the Soil
Over-Watering Develops Fungi in the Soil
Over-Watering Weakens Drought Tolerance and Reinforces Over-Watering
Under-Watering Stresses Lawns and Promotes Weed Growth
Water conservation By Acclima

14. Water conservation By Acclima
8701 – EZ Pro Xtra
Simple retro-fit design
Single Sensor
Works with existing controller
Converts any 24V controller to Sensor-based System
Easy Installation
Water conservation By Acclima

15. Water conservation By Acclima
8710 – EZ Pro Max
Central Control System
Water on Demand
64-Zone capacity
Run up to 16 sensors
Buit-in modem
Remote Control Access
2 Wire Connectivity
Friendly Software
Water conservation By Acclima

16. Water conservation By Acclima
Communicating with other Devices
2-wire bus
1 valve
2 valves
4 valves
1 valve
2 valves
Water conservation By Acclima

17. Water conservation By Acclima
2-Wire System Specifications
Maximum distance for controller to any device: 1300m
Maximum total paired wire load (unsheathed): 3300m
Maximum total paired wire load (sheathed): 4950m
Water conservation By Acclima

18. Water conservation By Acclima
CSU Site Performance 8/1 to 9/16 (2004)
Zone Type
CSU Timer Minutes
Acclima Minutes
Water Savings
Gear Drives
15 Zones
12,150
5,503
54.7%
Spray Head
4 Zones
1,440
356
75.3%
Total
19 Zones
13,590
5,859
56.9%
Water conservation By Acclima

19. Water conservation By Acclima
Clark County School District (Acclima) vs 2002 (ET)
Maxicom
Acclima m3
3,458
2,718 mm
215.39
169.93
%ET
102%
80.6%
cost
$34,963
$27,480
savings
$7,483 (21.4%)
Water conservation By Acclima