ESP-SMT Smart Modular Control System81Total Area Covered Method to DeterminePrecipitation Rate and Efficiency (moderateaccuracy)1. Determine the Manufacturer and Model of thesprinkler being used in the zone, making particularnote of the specific nozzle being used at eachsprinkler location. For Example a Rain Bird 5004 withthe following MPR nozzles are being used on Zone 1(Full Circle = MPR 30Q, Half Pattern = MPR30H andQuarter Patterns = MPR30Q). See illustration in thenext column.2. Determine the operating water pressure at theSprinkler Nozzle. Example = Water Pressure = 45 psi.3. Obtain Catalog Information for Sprinkler (Thisinformation is usually found on the Manufacturerweb site).5004 MPR Nozzle Series @ 45 psiModel Radius Pattern Flow (GPM)30Q 30 Foot Quarter 1.4030H 30 Foot Half 2.5930F 30 Foot Full 5.784. Determine the Total Amount of flow (GPM) for thearea being covered by the zone.Example: (4) 30Q’s @ 1.40 GPM+ (6) 30H’s @ 2.59GPM + (2) 30F’s @ 5.78. Total Zone 1 Flow = 32.7GPM5. Determine the Total Area (square feet) covered byZone 1.Example: the area is 60 feet by 90 feet = 5,400 squarefeet (SF)6. Calculate the Precipitation Rate (PR) using thefollowing formula:Total Flow (GPM) X 96.3____________________Total Area (sq. ft.)Example: Zone 1 PR = 32.7 X 96.3__________5,4007. Enter 0.58 inches per hour into the ESP-SMTcontroller based on information contained on page20-21 of this User Manual.30Q(1.40)30Q(1.40)30Q(1.40)30 H(2.59)30 H(2.59)30 H(2.59)30 H(2.59)30 H(2.59) 30F(5.78)IrrigatedArea 30F(5.78)ZONE 1TOTALFLOW(32.7GPM)30 H(2.59) 30Q(1.40)90 FT.60 FT.
