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Rain Master Irrigation Systems
Appendix A
Flow Meters
T
he Evolution DX2 series controller provides a variety of user-
configurable, flow-related features for either one or two flow
sensors, referred to as Flow #1 and Flow #2.
The Evolution DX2 flow features/capabilities include:
•
Display of instantaneous flow rate in gallons per minute
(GPM) for Flow #1, Flow #2 and total (Flow #1 + Flow
#2). Flow rates are updated every ten seconds.
•
Display of monthly flow accumulations in gallons for
Flow #1, Flow #2 and total (Flow #1 + Flow #2). Flow
accumulation in gallons is updated every minute.
•
Automatic termination of watering based upon flow
limit violations:
o
o
o
o
o
•
Automatic condemnation and reporting of
stations violating flow limits. Warning
information is provided in the Field
Maintenance Activity and Troubleshooting
section of the manual.
•
Automatic establishment of station upper and
lower flow limits (learn mode).
Page 232
Main line flow rate for controller (GPM)
Maximum flow rate per station (GPM)
Minimum flow rate per station (GPM)
Maximum flow accumulation per month
(gallons)
Unscheduled flow rate for controller (GPM)
DX2 User Manual
Appendix A: Flow Meters
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Summary of Contents for Rain Master DX2 series
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Page 1: Appendix A Flow Meters
DX2 User Manual Appendix A Flow Meters he Evolution DX2 series controller provides a variety of user- configurable, flow-related features for either one or two flow sensors, referred to as Flow #1 and Flow #2. The Evolution DX2 flow features/capabilities include: •... - Page 2 Rain Master Irrigation Systems DX2 User Manual Flow Meter Operation Overview In order to display flow rate and/or flow accumulation data: a. Insure flow sensor/meter has been properly connected Refer to Flow Sensor Installation Instructions b. Establish the appropriate flow calibration criteria, see "Flow Meter Offset and K Values In order to establish flow limit checking either on a controller or individual station basis, verify the following:...
- Page 3 Rain Master Irrigation Systems DX2 User Manual Flow Reading Accuracy Since the Evolution DX2 controller has been designed to work directly with flow sensors, the accuracy of the actual readings are limited only by the flow sensor devices. Typical accuracy values are approximately 1%.
- Page 4 Rain Master Irrigation Systems DX2 User Manual Table 3: Calibration Table Tee Mounted Sensors – Flow Sensors Appendix A: Flow Meters Page 235...
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Page 5: Flow Limit Checking
Rain Master Irrigation Systems DX2 User Manual Data Industrial Tee Mounted Sensors Complete calibration tables for Tee mounted sensors are listed at the end of this appendix. Flow Limit Checking To perform limit checking, the controller computes a Gallon- Per-Minute (GPM) flow rate based upon the total gallons used in the previous 60 seconds. - Page 6 Rain Master Irrigation Systems DX2 User Manual The suggested upper limit flow rate should be set to the nominal flow rate for the station + 20%. The system default value for upper station limit is 500 GPM. Obtain the nominal flow rate from the controller display (see Chapter 7, for the steps in displaying flow rate).
- Page 7 Rain Master Irrigation Systems DX2 User Manual Total Monthly Flow Limit Enter a maximum monthly flow limit, as described in Chapter 4. The controller compares the accumulated monthly flow to maximum monthly flow limit. If the accumulated flow is greater than the limit, an error condition is detected.
- Page 8 Rain Master Irrigation Systems DX2 User Manual The Unscheduled Flow procedure is given in the Controller Setup section of Chapter 4. The default limit is 200 GPM. Enabling and Disabling Flow Limit Checking Once the station limits have been established, the flow limit checking (upper and lower limits) may be enabled or disabled.
- Page 9 Rain Master Irrigation Systems DX2 User Manual Observe which station takes the longest time for its GPM rate to "settle." Round this time period to the next minute and use this rounded value as the flow rate limit check delay. Warning: This delay value establishes the amount of time in which a main or station line break can be detected...
- Page 10 Rain Master Irrigation Systems DX2 User Manual Limit Checking with Two Flow Meters When two flow meters are used, you may select which meter is used for limit checking. Alternately, you may check the total flow from both meters. See Chapter 4: Setup for details. Flow Meter Reading Procedure To observe flow meter readings, from the base menu:...
- Page 11 Rain Master Irrigation Systems DX2 User Manual FLOW #1 GPM=55 TOTAL GPM=205 FLOW #2 GPM=150 Figure 176: Flow Meter Readings Page 242 Appendix A: Flow Meters...
- Page 12 Rain Master Irrigation Systems DX2 User Manual Reading Monthly Water Totals Procedure To read the monthly water totals, from the base menu: Step 1 Advance to the Status Options screen as follows: F1=Main Menu F3=Status |F1|=COMM STATUS |F2|=MEASUREMENTS |F3|=WATER TOTAL |F4|=REVIEW ALL | | Figure 177: Status Options Step 2...
- Page 13 Rain Master Irrigation Systems DX2 User Manual When a Flow Limit Violation is Detected Upon detection of a flow limit violation, Evolution DX2 performs the following actions: 1. Terminate Irrigation • For a faulty station, immediate termination of irrigation for that station. The program will automatically advance to the next station in the program.
- Page 14 Rain Master Irrigation Systems DX2 User Manual Flow Limit Violation Examples Overflow in Controller/Main Line Break Assume the maximum controller flow rate is 500 GPM. A main line break occurs while attempting to water station 7. The break results in a flow of 750 GPM. The following warning message is displayed, as well as the station number and GPM reading.
- Page 15 Rain Master Irrigation Systems DX2 User Manual Station Overflow Assume station 2 has an upper limit of 300 GPM. A broken line occurs, resulting in a 400 GPM flow. The following entry is placed in the warning list. WARNING = FLOW UP LIMIT 05/20/96 12:05 STA = 2, MV1,...
- Page 16 Multiple Stations with Non-Overlap Protection The Evolution DX2 controller allows the user the capability of turning "on" several stations simultaneously. When flow meters are used in this environment, the individual station limits are summed and compared to the total flow rate.
- Page 17 Table 4: Rain Master K and Offset Value Rain Master K and Offset Value For Data Industrial Flow Sensors CALIBRATION TABLE – TEE MOUNTED SENSORS (Current Production) Models) (Series: 228PV, 228 BR, 228 CB, 228 CS, 228SS, 250BR) Data Apparent Evolution Evolution Industrial Satellite Satellite Design...
- Page 18 Rain Master Irrigation Systems DX2 User Manual OBSOLETE OR OLDER MODEL FLOW SENSORS (Series: 220P, 228B, 228CB, 250B, 228PF, 228PD, 228CS, 228SS, *IR220P, IR228B, IR228CB, IR250B, IR228CS, IR228SS) Data Apparent Evolution Evolution Max Design Minimum Industrial Satellite Satellite Design Flow...
- Page 19 Rain Master Irrigation Systems DX2 User Manual Rain Master K and Offset Value For Data Industrial Flow Sensors Evolution Evolution Pipe Size Pipe Pipe Min. Min. Satellite Satellite O.D. in I.D. in Flow in Flow in K Value Offset Inches...
- Page 20 Rain Master Irrigation Systems DX2 User Manual Rain Master K and Offset Value For Data Industrial Flow Sensors Evolution Evolution Pipe Size Pipe Pipe Min. Min. Satellite Satellite O.D. in I.D. in Flow in Flow in K Value Offset Inches...
- Page 21 Rain Master Irrigation Systems DX2 User Manual Rain Master K and Offset Value For Data Industrial Flow Sensors Evolution Evolution Pipe Size Pipe Pipe Min. Min. Satellite Satellite O.D. in I.D. in Flow in Flow in K Value Offset Inches...
- Page 22 Rain Master Irrigation Systems DX2 User Manual Figure 184: Flow Sensor Installation Appendix A: Flow Meters Page 253...