Micro Motion Precision Based Filling
Transcript of Micro Motion Precision Based Filling
[File Name or Event] Emerson Confidential 27-Jun-01, Slide 1
Title: Challenges in Characterizing Flowmeter Dynamic Response
Mass Flow is directly proportional to
Delta T (Pickoff Signal Phase Shift)
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1 7 13 19 25 31 37 43 49 55 61 67 73 79 85Mass Flow
6 7
Coriolis Mass Flow Metering
In this Presentation I will
Discuss Industrial Applications
for High Speed Flow Metering
Chuck Gray, Micro Motion
[File Name or Event] Emerson Confidential 27-Jun-01, Slide 2
Chuck Gray Application & Test Engineer - Micro Motion Inc
Micro Motion Technology • Product support
• EMC
• Flow Measurement Test
• “High End” Customer Support
• 23 Years Experience
Retired Naval Flight Officer
• Patrol Aviation & Naval Air Test
BSEE – University of Colorado
• Electrical Power & Control Systems
[File Name or Event] Emerson Confidential 27-Jun-01, Slide 3
High Speed Applications
Pipeline Provers
High Speed Filling
Numerous Other Specialized Applications
[File Name or Event] Emerson Confidential 27-Jun-01, Slide 4
Response to Flow Change
Response Time is the Time between a Physical Change & a Corresponding Change in an Output Signal
Coriolis meters exhibit a two-part response curve for changes in measured flow
– a fixed processing delay - Latency
• a function of the system architecture
– second part of the response curve approximates an RC delay - Damping
• Typically adjustable by the user
• Rise Time
• Settling Time
[File Name or Event] Emerson Confidential 27-Jun-01, Slide 5
Definitions
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No
rmali
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Flo
w
Time (Seconds)
Response Time; Old vs Improved Technology Rise Time
Latency
Settling Time
Actual Flow
Improved Response Flow
Signal
Flow Signal
95%
63 %
Other Considerations Update Rate
Reference Conditions
[File Name or Event] Emerson Confidential 27-Jun-01, Slide 6
Coriolis Meter Geometry These are dual tube meters
Common Coriolis Geometries
MMI CMF100 1”
MMI CMF400 4”
E&H F83 1”
Straight Tube Meter
[File Name or Event] Emerson Confidential 27-Jun-01, Slide 7
Theory of Operations – Mass Flow
Mass Flow is directly proportional to Delta
T (Pickoff Signal Phase Shift)
[File Name or Event] Emerson Confidential 27-Jun-01, Slide 8
MMI DSP – No Lost Flow data
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Shifted
Reference
T
Frequency (Hz) = 1/T (sec)
2π radians
MMI DSP Transmitters Convert the Pickoff
Signal at a 48 Khz Rate
~80 to 250 samples
per ½ cycle
In Analog
Transmitters Flow
is Computed every
½ cycle (only)
[File Name or Event] Emerson Confidential 27-Jun-01, Slide 9
Measured Meter Response to Valve Closure
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Mass F
low
Lb
s./M
in.
Time in 10's of Milliseconds
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44 MSec 40 MSec
85 MSec
95
Latency
63% (1 Tc) Response
An Older, Production Meter
set for 0.04 Damping
Analog Flow Signal
[File Name or Event] Emerson Confidential 27-Jun-01, Slide 10
Use Appropriate Flow Damping (filtering)
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Steady Flow - 700/2700- Special mode 0.04 Damping
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Steady Flow 700/2700 - Special mode 0.64 damping
This Flow Signal Would be
Severely Aliased with a Slow
Sampling Control System
[File Name or Event] Emerson Confidential 27-Jun-01, Slide 11
Meter Zero & Calibration S
ca
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Meter
Zero Error Changes the Offset
Flow Calibration Changes the Slope
Fill Target
[File Name or Event] Emerson Confidential 27-Jun-01, Slide 12
Micro Motion MVD Technology
Multi- Stage DSP
– “immediate “ conversion to digital data for stability
– Versatile
• Very fast response with moderate filtering
– OR
• Slower response with extensive filtering
[File Name or Event] Emerson Confidential 27-Jun-01, Slide 13
Why are Response Characteristics Important? Matching the Meter to the Application
Pipelines
– Small Volume Provers
Chemical Plants & Refineries – Fast Control Loops
Special Applications
– Automotive RDT&E
Food & Beverage
– Filling
• Short Fills
• Dosing
• Specialty
[File Name or Event] Emerson Confidential 27-Jun-01, Slide 14
Filling Machines
Bag in Box
Rotary – PSA w/1500F
[File Name or Event] Emerson Confidential 27-Jun-01, Slide 15
Heavily Aerated Liquid Laundry Detergent at the
product feed supply to Filling Pressure Tank.
H 050 Sensor with Precision Filling Valve
Sample from
Pressure Tap
Accuracy
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Fill_Value
Scale
% Accuracy
% Fill accuracy
H 50 Performance on
Aerated Detergent
Fill = 1000 Grams; Fill Time ~ 3.78 Sec Flow ~ 264 G/Sec.
[File Name or Event] Emerson Confidential 27-Jun-01, Slide 16
FMT Performance – Better Std Dev!
Meter Rate
G/Sec.
Fill
Target
Grams
Fill Time
Sec.
Average Fill
Grams
Fill
Standard
Deviation*
.5” 250 1250 4.87 1249.94 0.06%
.5” 125 250 1.99 250.37 0.15%
.5” 62.5 47 0.74 47.02 0.18%
.15” 100 50 0.52 50.02 0.12%
.15” 50 37.5 0.69 37.55 0.18%
.15”
10 5 0.49 5.01 0.33%
* Fill Standard Deviation was calculated using 30 points. Test
data demonstrates performance of the complete fill system.
[File Name or Event] Emerson Confidential 27-Jun-01, Slide 17
Filler OEM: Results with Micro Motion Coriolis
Higher Efficiency and Reliability – 10,000 cases per shift vs. 8,000 with older, less reliable filling technology
Greater Accuracy = Less Giveaway: Product savings alone can pay for a machine in 2 to 5 years.
Faster changeover/cleaning = More flexibility and shorter runs. Less inventory and greater uptime!
Additional measurables provide new features such as density & temperature tracking for quality control.
[File Name or Event] Emerson Confidential 27-Jun-01, Slide 18
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Avg
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eig
ht
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Old Filling Technology Machine
Filled Container
Samples New Filling Machine with MMI
Coriolis Filling Technology
Target Fill 3990 Grams
[File Name or Event] Emerson Confidential 27-Jun-01, Slide 19
Flow Meter Fill Standard Deviation vs Flow Rate – Several Fill Times
10:1 Turndown 2:1 Turndown
[File Name or Event] Emerson Confidential 27-Jun-01, Slide 20
Pipeline Proving
Volumetric Flow Meter References
– Useful when Flow Can’t be Interupted
Large Volume – “Ball” Provers
– Long Run Times
• Measurement Phase Difference Generally not Problematic
Small Volume – “Piston” Provers
– Short Run Times
• Measurement Phase Difference may Cause Significant Error
• Well Documented by others.
– Takashi Shimada, et all (National Metrology Institute of Japan)
– Micro Motion Proving Manual, (Cathy Apple)
[File Name or Event] Emerson Confidential 27-Jun-01, Slide 21
Daniel Ball Prover
The time is measured as the ball traverses the pipe between two detectors
The ball is launched & recovered here
[File Name or Event] Emerson Confidential 27-Jun-01, Slide 22
Daniels Compact Prover
[File Name or Event] Emerson Confidential 27-Jun-01, Slide 23
Daniel Small Volume Prover
Outlet
Inlet
Valve Actuation Cause flow
rate change
Pre-Run Time Run Time
[File Name or Event] Emerson Confidential 27-Jun-01, Slide 24
Flow Change with Prover “Launch”
Analog RFT 9739 Data
Micro Motion
Proving Manual
[File Name or Event] Emerson Confidential 27-Jun-01, Slide 25
Erratic Product Delivery
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Mass Flow_4
Mass Flow_4
[File Name or Event] Emerson Confidential 27-Jun-01, Slide 26
THANK YOU !