global flow measurement calibration consistency · 2018-05-16 · global flow measurement...

Global Flow Measurement Calibration Consistency

Erik Smits – VSL, Manager Metrology Services / Senior Metrologist Liquid Flow & Volume

Dean Standiford – Emerson, Global Calibration Quality

First presented at:

Emerson Global Users Exchange

2018, Den Haag (NL)

Driving to the airport on Friday

2

What happened Friday?

3

What happened? What did I forget?

• I doubted the amount of fuel I received and with that I expected that I paid to much this time,

• I tried to compare fuel dispenser number 2 with number 4 with as reference the indicators in my car,

• There is a tolerance for the fuel dispenser of +/- 0.5%. Was this difference within the tolerance?

• My car is not a calibrated reference volume and the indicators in my car might have large tolerances!

The question is: How can we compare measurements?

VSL – National Metrology Institute (NMI) of the Netherlands

4

Time and frequency

ElectricityTemperature and humidity

Length

Gas flow

Viscosity

OpticsChemistry Mass

Ionising

radiationPressureLiquid flow and

volume

Do we need accurate measurement in flow applications?

• Just inventory measurement within a company (based on volume or flow),

• Between two companies and maybe a large distance (flow based),

• Between two countries and maybe even two or more companies,

• Legal metrology organization in one country and maybe a commercial company in the other.

You can be sure that there are differences in measurements. How much would you allow?

5

A B

500 km

Country A to B

What do we need for good measurements?

6

Measurements need to be Comparable and Reliable and this can be done through:

• A solid measurement system (good definitions)SI units (USC units)

– 7 base units in SI: m, kg, s, A, K, mol, cdAll flow measurements units traceable to one or more base units (m3/s, kg/s, m/s, kg/m3 mm2/s, kg, m3, mol, etc),

• Unbroken chain of calibration and comparisons to (inter)national measurement standards,

• Specified measurement uncertainties,

• Instruments that show repeatable and reproduceable measurements results. Instruments that can cope with changing conditions.

Instrument calibration

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Who performs calibration At what moment

• National Metrology Institute,

• Notified body or other legal authority,

• Accredited calibration laboratory,

• Non accredited calibration laboratory,

• Manufacturer,

• Owner,

• Service provider,

• Others…

• Initial calibration after the instrument is manufactured to characterize the instrument for the intended use,

• Legalization so it can be used in trade,

• During use. For example during loading crude the flow meter is proved and adjusted if needed,

• Annual due to contracts etc,

• When drifts are identified,

• Many, many other occasions.

How is measurement organized in the world?

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• BIPM > National Metrology Institutes like VSL

• OIML > for example NoBo’s like NMi-Certin

• ILAC > accreditation organizations like UKAS

• ISO > publishing authority for standards likeISO/IEC17043:2010 Proficiency Testing

How can we compare calibration results?

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By means of comparisons Who organizes comparisons

• Between National Metrology Institutes and Designated Institutes

– Primary level (realization of the SI units) for example time standard

– Secondary levels like in flow measurement

• Between National Metrology Institutes and commercial accredited and non-accredited laboratories, service providers etc..,

• Between commercial organizations.

• BIPM for NMI’s and DI’s (One NMi or DI takes the lead),

• Regional Metrology Organizations for it’s member and from time to time other NMI’s and DI’s (One NMi or DI takes the lead),

• Proficiency Testing organization for customers. This can be accredited or non-accredited.

• VSL has an accredited services and organizes comparisons commercially but also for BIPM and Euramet (RMO of Europe)

Comparisons between National Metrology Institutes

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BIPM Level for flow CCM-WGFFRegional Metrology Organizations like Euramet

Key-Comparisons for:

• K1 – Water Flow

• K2 – Hydrocarbon Flow

• K3 – Air Speed

• K4 – Liquid Volume

• K5 – High Pressure Gas Flow

• K6 – Low Pressure Volume Flow

• Regional round of the Key-Comparisons

• Bilateral comparisons

• All kind of other comparisons Including test runs for Key-Comparisons (R&D)

Key-Comparison CCM.FF-K2.2011 (1)

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• Hydrocarbon (K2) and Water (K1) flows between 10 and 60 kg/min,

• Free of disturbances from the different pipe configuration at the participants,

• No need for the participant to change the position of meter 1 and 2 upstream or downstream of each other,

• Zero influence in results as small as possible,

• Etc… @ NMI-J

Key-Comparison CCM.FF-K2.2011 (2)

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Participants Some facts

• VSL, Netherlands (Pilot Erik Smits),

• TUV NEL, UK,

• PTB, Germany,

• BEV, Austria,

• NIST, USA,

• NMI-J, Japan

• Kriss, South Korea,

• CMS, Chinese Taipei,

• MC, Canada > Euramet project

• All participants tested with one or more hydrocarbons,

• 5 participants tested also with water,

• VSL tested 3 times at start, after European tour and at the end to check the stability of the system,

• Shocks caused by transport were monitored and stored,

• Transport cost for small flow meters in relative large skid +/- 40 kE,

• Total cost of such a project …….

On the road

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Temperature of skid G-forces

Results Key-Comparison CCM.FF-K2.2011 for water

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Clarifications

• The graph is not final yet until WGFF has approved. No changes to be expected,

• Only one meter presented. Upstream and downstream results are combined for readability of Key-Comparison report,

• In the graphs only 30, 40 and 50 kg/min are presented other results are of the same magnitude,

• Hydrocarbon results are still under review.

These results are not final yet. This as the final report has not been

published officially on the BIPM key-comparison database website!

Emerson Calibration Facilities

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• Flow measurement devices need calibrated to ensure the measurements are accurate and traceable to the International System of Units (SI)

• Flow meters are produced and calibrated all over the world

• Accuracy of a flow meter should not depend on where it is calibrated

Boulder, USA

Abu Dhabi, UAE

Nanjing, China

Sorocaba, Brazil

Singapore

Ede, Netherlands

Melbourne, Australia

Cluj, Romania

Chihuahua, Mexico

Emerson Traceability

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• Standard calibration programs provide vertical traceability

• PT programs provide horizontal traceability

National Mass Standard

NIST-USA

Reference Mass Standard(Emerson or contract service

maintained)

Emerson MMI

Boulder, USA

Gravimetric Stand

Scales

Micro Motion Inc. Boulder, USA

Traceability & Uncertainty

ISO 17025-NVLAP

LAB Code: 200918-0

International Mass Standard


VSL-The Netherlands


maintained)

EPM Flow BV

Ede, NL

Gravimetric Stand

Scales

EPM Flow BV Ede, NL


ISO 17025-RvA

RvA K 153

Certified-VSL

LF.2007.06.0005


NIM-China


maintained)

EPM Flow

Technologies Co.

Ltd. Nanjing, China

Gravimetric Stand

Scales

EPM Flow Technologies Co. Ltd.

Nanjing, China


ISO 17025-SAC

Cert No: LA-2010-0469-C

CMC Certified-NIM

Traveling Measurement

StandardMicro Motion Global

Reference Meters

Emerson MMI

Boulder, USA

TSM Stand

Reference Meters

EPM Flow

Technologies Co.

Ltd. Nanjing, China

TSM Stand Reference

Meters

Working Measurement

StandardMicro Motion Gravimetric

Primary Flow Stands


NIM-Romania


maintained)

EPM Flow

Technology Center

S.R.L. Cluj-Napoca,

Romania Gravimetric

Stand Scales

EPM Flow Technology Center

S.R.L. Cluj-Napoca, Romania


ISO 17025-RENAR

Cert No: IN PROCESS

EPM Flow

Technology Center

S.R.L. Cluj-Napoca,

Romania TSM Stand

Reference Meters

EPM Tecnologias de

Flujo

Chihuahua, Mexico

TSM Stand

Reference Meters

EPM Tecnologias de Flujo

Chihuahua, Mexico


ISO 17025-ema

LAB Code: FL-28, DEN-23

EPM Tecnologias de

Flujo

Chihuahua, Mexico

Gravimetric Stand

Scales


CENAM-Mexico


maintained)

Comparisons Between Emerson Calibration Labs

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USA

Netherlands

Romania

MexicoChina

Singapore

Australia

Previous Current

Netherlands

VSL

0.020%

China

NIM

0.050%

Mexico

CENAM

0.035%

USA

NIST

0.035%

Micro Motion Coriolis Transfer Standards

• Use Coriolis flow meters to run four tests on two same size meters

– Take-out / Put-back reproducibility

– Hysteresis

– Repeatability

– Compare with local National Metrology Institute

• Different size flow meter run each year to cover entire system flow range over the span of 5 years with external labs

– Internal comparisons covering the entire flow range performed routinely as part of a measurement assurance program

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3 repeats 3 repeats

A 1 5% 100% 67% 25% 5%

B 2 5% 25% 67% 100% 5%

C 1 5% 25% 67% 100% 5%

D 2 5% 100% 67% 25% 5%

Test Meter

Flow Rate Sequence

Cardinal Rates (5 repeats)

2017 Proficiency Test Results

• Details

– Only 1 meter, Test A presented

– Other tests also representative

• (see En slides)

– Cardinal flow rates (4.8, 12, 18.1 kg/min)

– 1 year, start to finish

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VSL Independent Report of Results

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VSL is ISO/IEC 17043 Accredited for Proficiency Testing

VSL Evaluation of Claimed Uncertainty (CMC)

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Conclusions

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• The results for water mass flow rate of Key-Comparison CCM.FF-K2.2011 meet all criteria’s set,

• VSL results for water mass flow compare with four other NMI’s, DI’s and CMC is consistent with the Key Comparison Reference Values,

• Results of VSL can be used in commercial comparisons under ISO/IEC17043 accreditation as reference values for others. Other water flow facilities can be linked to the KCRV.

Note: CCM.FF-K2.2011 results are not final yet!

• Emerson performs flow meter calibrations that are traceable to the International System of Units (SI).

• Emerson utilizes VSL as an ISO/IEC 17043 accredited proficiency test provider to ensure the accuracy of the calibration does not depend on where it is calibrated.

• Comparison results between the Emerson labs support the claimed uncertainty.

global flow measurement calibration consistency · 2018-05-16 · global flow measurement...

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