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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50.000

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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


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


High Speed Applications

Pipeline Provers

High Speed Filling

Numerous Other Specialized Applications


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


Definitions

0.00

0.20

0.40

0.60

0.80

1.00

1.20

1.40

23.500 24.500 25.500 26.500 27.500 28.500

No

rmali

zed

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


Coriolis Meter Geometry These are dual tube meters

Common Coriolis Geometries

MMI CMF100 1”

MMI CMF400 4”

E&H F83 1”

Straight Tube Meter


Theory of Operations – Mass Flow

Mass Flow is directly proportional to Delta

T (Pickoff Signal Phase Shift)


MMI DSP – No Lost Flow data

-1.5

-1

-0.5

0

0.5

1

1.5

123

45

67

89

11

113

315

517

719

922

124

326

528

730

933

135

337

539

741

944

146

348

550

752

955

1

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)


Measured Meter Response to Valve Closure

-20

0

20

40

60

80

100

120

140

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

Mass F

low

Lb

s./M

in.

Time in 10's of Milliseconds

63

44 MSec 40 MSec

85 MSec

95

Latency

63% (1 Tc) Response

An Older, Production Meter

set for 0.04 Damping

Analog Flow Signal


Use Appropriate Flow Damping (filtering)

126.000

126.500

127.000

127.500

128.000

128.500

178

15

523

230

938

646

354

061

769

477

184

892

510

02

10

79

11

56

12

33

13

10

13

87

14

64

15

41

16

18

16

95

17

72

18

49

19

26

Steady Flow - 700/2700- Special mode 0.04 Damping

126.500

127.000

127.500

128.000

128.500

1

47

93

13

9

18

5

23

1

27

7

32

3

36

9

41

5

46

1

50

7

55

3

59

9

64

5

69

1

73

7

78

3

82

9

87

5

92

1

96

7

Steady Flow 700/2700 - Special mode 0.64 damping

This Flow Signal Would be

Severely Aliased with a Slow

Sampling Control System


Meter Zero & Calibration S

ca

le

Meter

Zero Error Changes the Offset

Flow Calibration Changes the Slope

Fill Target


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


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


Filling Machines

Bag in Box

Rotary – PSA w/1500F


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

995

996

997

998

999

1000

1001

1002

1003

1004

1005

1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39

-0.2

-0.1

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

Fill_Value

Scale

% Accuracy

% Fill accuracy

H 50 Performance on

Aerated Detergent

Fill = 1000 Grams; Fill Time ~ 3.78 Sec Flow ~ 264 G/Sec.


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.


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.


3950

3960

3970

3980

3990

4000

4010

4020

4030

4040

4050

Avg

. W

eig

ht

(gra

ms

)

Old Filling Technology Machine

Filled Container

Samples New Filling Machine with MMI

Coriolis Filling Technology

Target Fill 3990 Grams


Flow Meter Fill Standard Deviation vs Flow Rate – Several Fill Times

10:1 Turndown 2:1 Turndown


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)


Daniel Ball Prover

The time is measured as the ball traverses the pipe between two detectors

The ball is launched & recovered here


Daniels Compact Prover


Daniel Small Volume Prover

Outlet

Inlet

Valve Actuation Cause flow

rate change

Pre-Run Time Run Time


Flow Change with Prover “Launch”

Analog RFT 9739 Data

Micro Motion

Proving Manual


Erratic Product Delivery

-200.000

-100.000

0.000

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119

37

55

73

91

10

912

714

516

318

119

921

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525

327

128

930

732

534

336

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984

7

Mass Flow_4

Mass Flow_4


THANK YOU !

micro motion precision based filling

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