By Norman Bartlett Creative Sensor Technology 1. Irrigator’s View of Landscape Irrigation “ We...
-
Upload
heather-mitchell -
Category
Documents
-
view
212 -
download
0
Transcript of By Norman Bartlett Creative Sensor Technology 1. Irrigator’s View of Landscape Irrigation “ We...
CST Flow Sensor Basics
ByNorman Bartlett
Creative Sensor Technology
Creative Sensor Technology 2
Irrigator’s View of Landscape Irrigation“ We are beautifying the world”
Public’s View “You are wasting water, our precious and
dwindling resource”
Creative Sensor Technology 3
REASON #1 TO MEASURE WATER1. Verify system design efficiency
A. Distribution uniformityB. Matched sprinkler precipitation ratesC. Sprinkler zone make-up by:
A. Plant materials (crop coefficients)B. SlopeC. ExposureD. Soil type
D. Observe Actual Precipitation Rate
Creative Sensor Technology 4
REASON #2 TO MEASURE WATER2. Create a Water Budget and Balance Supply
with Demand
LWA ≥ LWRYou cannot Balance unless you measure
Creative Sensor Technology 5
REASON #3 TO MEASURE WATER3. Document what you have done
A. Keep detailed records of water usage, ET or temperature information, etc. by day, month, season, year
B. Defend your water usage with dataC. Market your skill as a water managerD. Promote your organization as a good citizen and
good steward of the environment.
Creative Sensor Technology 6
REASON #4 TO MEASURE WATER
4. Detect Leaks and Prevent Waste
Creative Sensor Technology 7
REASON #5 TO MEASURE WATER
Comply with the new Cal. MWELO
Creative Sensor Technology 8
Fundamentals
Creative Sensor Technology 9
Flow Sensor Parts
Creative Sensor Technology 10
Water flowing through the pipe turns the
impeller
Electronics in the insert count the blades as they go by the detector
The output is a digital pulse proportional to the speed of rotation
Formula converts the signal into a flow rate using conversion factors (K and Offset, PPG)
Creative Sensor Technology 11
Designed to measure a range of water qualities
Rate of Flow measuring device
Broad range of flow Negligible pressure
loss Fast Signal format
Flow Sensor
Creative Sensor Technology 12
Meter vs. SensorWater Meter
Designed to measure domestic (potable) water
Totalizer Clean water only Limited range of
flows High pressure loss Slow signal format
Creative Sensor Technology 13
Flow Sensor Insert
Creative Sensor Technology 14
Alternative Mounting Options
Creative Sensor Technology 15
Alternative Mounting Options
Creative Sensor Technology 16
Creative Sensor Technology 17
Creative Sensor Technology 18
19
Flow sensor wiring
Creative Sensor Technology 20
Creative Sensor Technology 21
Creative Sensor Technology 22
Creative Sensor Technology 23
Why is CST a better mousetrap? Comparison with other impeller sensors
2. 1” Sensor ConstructionCST has a 1 inch PVC Sensor in the FSI seriesDI has only a threaded brass unit.
Creative Sensor Technology, Inc. 24
3. Sensor Assembly
The CST sensor insert is held into the mounting tee with a larger diameter, ACME threaded retaining nut making disassembly and assembly quick and easy, particularly in underground valve boxes.
The DI sensor insert is held in the mounting tee with a pin and split ring. The insert must be aligned and inserted to the correct depth in order to push the pin horizontally through the housing. This can be awkward and difficult in the small valve box.
Creative Sensor Technology, Inc. 25
Creative Sensor Technology, Inc. 26
4. Saddle type sensors
◦ Available in 3 and 4 inch◦ Easier to install on
larger pipe sizes◦ Complete with saddle◦ Offers same wide range
of flows
5. Electrical Protection The CST sensor electronics have been designed
with protection against reverse wiring, overvoltage and over current.
6. Watertight Integrity The CST sensor housing and wiring has been
designed to protect the electronics from moisture, improving on the design flaw of the DI sensor.
Creative Sensor Technology, Inc. 27
CST Sensor Advantages Better low flow detection Easier to install/service with jar top Better electronic protection Higher pressure rating Virtually no friction loss Lower cost
Creative Sensor Technology, Inc. 28
Creative Sensor Technology 29
Why are we better?
Comparison with combination master valve/meters (Hydrometer
Creative Sensor Technology 30
Hydrometer
Creative Sensor Technology 31
Creative Sensor Technology 32
Creative Sensor Technology 33
Creative Sensor Technology 34
Creative Sensor Technology 35
Creative Sensor Technology 36
Installation
Creative Sensor Technology 37
Creative Sensor Technology 38
Creative Sensor Technology 39
Creative Sensor Technology 40
Creative Sensor Technology 41
To Summarize-Add flow measurement to:1. Verify that your installed system meets the
design goals of efficiency and functionality2. Verify water application rates and balance
water use with available water supply3. Document and record water usage and
savings4. Prevent water loss or site damage by
continually monitoring flow
Questions?