FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity...
Transcript of FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity...
![Page 1: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/1.jpg)
1
MWEA Collection System Seminar September 11, 2014
FLOW METER OPERATION & MAINTENANCE
1
![Page 2: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/2.jpg)
2
Operations & Maintenance
• Permanent Meters
• Billing meters
• Meters used for Temporary Studies
2
![Page 3: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/3.jpg)
3
Area - Velocity Flow Meter
• Continuity Equation Q = A x V
• Q = the volumetric flow rate
• A = the cross sectional area of the flow
• V = the mean velocity
3
![Page 4: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/4.jpg)
Area Velocity Flow Meters
![Page 5: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/5.jpg)
Area Velocity (Continuous Wave Doppler)
Flow Meters
Advantages
• Easy installation & maintenance.
• Can measure flows down to 1 inch of level.
• No enclosure required.
• Relatively low cost.
Disadvantages
• Accuracy of +5% in normal field conditions.
• Maintenance required (Sensor subject to fouling and grease).
![Page 6: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/6.jpg)
6
Doppler - Area Velocity Meter Probe
![Page 7: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/7.jpg)
7
7
![Page 8: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/8.jpg)
8
Pressure - Depth sensor
8
![Page 9: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/9.jpg)
9
Doppler - Area Velocity Meter Probe
![Page 10: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/10.jpg)
10
Atmospheric Pressure
10
![Page 11: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/11.jpg)
11
Pressure Sensors
• Atmospheric vent tube
11
![Page 12: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/12.jpg)
12
DESICCANT - ATMOSPHERIC REFERENCE
• Blue is good!!
12
![Page 13: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/13.jpg)
13
DESICCANT
13
![Page 14: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/14.jpg)
14
It’s time to replace the desiccant
14
![Page 15: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/15.jpg)
15
Pressure Sensors are expensive
15
![Page 16: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/16.jpg)
16
Pressure - Depth sensor
16
![Page 17: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/17.jpg)
17
Communicate with Maintenance staff
17
![Page 18: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/18.jpg)
18
Site Selection - ?
18
![Page 19: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/19.jpg)
19
Range Gated Doppler Flow Meter
19
![Page 20: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/20.jpg)
20
ADFM
• Ultrasonic level sensor
20
![Page 21: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/21.jpg)
21
ADFM Velocity Profile
21
![Page 22: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/22.jpg)
22
Full Pipe Flow Meter (ADFM)
22
![Page 23: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/23.jpg)
23
ADFM Flow Meter
• AC or DC powered
23
![Page 24: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/24.jpg)
24
Radar Flow Meter
24
![Page 25: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/25.jpg)
25
Radar Flow Meter
25
![Page 26: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/26.jpg)
26
Radar Flow Meter
26
![Page 27: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/27.jpg)
27
Radar Flow Meter
27
![Page 28: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/28.jpg)
Radar Flow Meters
Advantages • Non-contact level and
velocity sensors.
• Will work in large & small pipes.
• Easy installation & maintenance.
• No enclosure required.
• Relatively low cost.
Disadvantages • Accuracy of +5-% in
normal field conditions.
• Surface velocity only.
• Requires trained technician for repair and calibration.
![Page 29: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/29.jpg)
29
LASER - FLOW METER
29
![Page 30: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/30.jpg)
30
LASER FLOW METER
• No contact with the flow
30
![Page 31: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/31.jpg)
31
LASER FLOW METER
• Multiple velocity reads
31
![Page 32: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/32.jpg)
32
LASER FLOW METER
• No contact with the flow
32
![Page 33: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/33.jpg)
Laser Flow Meters
Advantages • Non-contact level and
velocity sensors.
• Multipoint profile, (15 -measurements 5 horizontal and 3 vertical
• Depth measurements (5%, 8% and 11% of depth)
• No enclosure required.
• Relatively low cost.
Disadvantages • Accuracy of +5-% in
normal field conditions.
• Maximum depth penetration is 6”
• Therefore the meter is seeing peak velocity and is unable to see the full profile of the flow
• Requires trained technician for repair and calibration.
![Page 34: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/34.jpg)
34
Magnetic Flow Meter
34
![Page 35: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/35.jpg)
35
Magnetic Field
35
![Page 36: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/36.jpg)
36
Magnetic Flow Meter Probe
36
![Page 37: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/37.jpg)
37
Magnetic Flow Meter Probe
37
![Page 38: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/38.jpg)
38
Battery Powered Meters
• You get what you pay for
38
![Page 39: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/39.jpg)
39
TRANSIT-TIME FLOW METER
• Multi-Path Meter
39
![Page 40: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/40.jpg)
40
Transit-Time Flow Meter
40
![Page 41: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/41.jpg)
41
Transit-Time Flow Meter
41
![Page 42: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/42.jpg)
Transit Time Flow Meters
![Page 43: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/43.jpg)
Transit-Time Flow Meters
Advantages • High degree of accuracy
(+2 to 5%) – Open Channel. (+0.5%) Full pipe application.
• Good for large pipes.
• Wide flow range.
• Ability to handle poor hydraulics.
Disadvantages • Relatively high cost.
• Air entrainment can cause issues.
• Requires a skilled technician and specialized equipment.
• Above ground enclosure required.
![Page 44: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/44.jpg)
Transit Time Flow Meters
![Page 45: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/45.jpg)
45
45
![Page 46: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/46.jpg)
46
• Cable Repair
– Don’t step on the cables. You can nick the cable jacket and this may allow moisture to cause short circuits.
– Most cables can not be repaired.
– If the cable or probe are damaged, it is very costly to replace.
46
![Page 47: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/47.jpg)
47
Magnetic (MAG) Flow Meter
47
![Page 48: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/48.jpg)
Magnetic Flow Meters
![Page 49: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/49.jpg)
Magnetic Flow Meters
Advantages • High degree of accuracy
(+0.5%) and consistent over full flow range when calibrated properly.
• No obstructions to flow.
• No moving parts.
• Wide flow range.
• Fixed area measurement
Disadvantages • Requires a FULL pipe
• Relatively high construction cost.
• Power supply is required.
• Repairs require skilled technician and specialized equipment.
• Electronic components vulnerable to lightning damage.
![Page 50: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/50.jpg)
50
Verify Your Information
50
![Page 51: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/51.jpg)
51
Pull out the maintenance file and check the settings
51
![Page 52: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/52.jpg)
52
Check all of the settings
52
![Page 53: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/53.jpg)
53
Parshall Flumes
53
![Page 54: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/54.jpg)
54
54
![Page 55: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/55.jpg)
55
Ultrasonic Down Looker
55
![Page 56: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/56.jpg)
Parshall Flumes
Advantages • High degree of accuracy
(+2%) and consistent over full flow range when calibrated properly.
• No moving parts.
• Wide flow range.
• Sediment control.
Disadvantages • Relatively high
construction cost.
• Level measurement required.
• Possible construction flaws.
![Page 57: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/57.jpg)
Parshall Flumes
![Page 58: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/58.jpg)
Parshall Flume with Foam
![Page 59: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/59.jpg)
Parshall Flume with Solids
![Page 60: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/60.jpg)
60
The Data Looks Good ???
60
![Page 61: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/61.jpg)
61
61
![Page 62: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/62.jpg)
62
Verify the As-Built Information
62
![Page 63: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/63.jpg)
63
Velocity Profiling
• .
63
![Page 64: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/64.jpg)
64
Portable Velocity Meter
• Send it back to the factory once per year to be re-certified
64
![Page 65: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/65.jpg)
65
Velocity Profile
65
![Page 66: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/66.jpg)
66
66
![Page 67: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/67.jpg)
Why isn't there any velocity reads?
![Page 68: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/68.jpg)
68
Flow Lab Verification
68
![Page 69: FLOW METER OPERATION & MAINTENANCE - … - Flow Meter.pdf3 Area - Velocity Flow Meter •Continuity Equation Q = A x V •Q = the volumetric flow rate •A = the cross sectional area](https://reader034.fdocuments.in/reader034/viewer/2022051602/5b007ecd7f8b9a84338cb269/html5/thumbnails/69.jpg)
69
Flow Lab Verification
69