Global Flow Measurement Calibration Consistency

Transcription

1 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)

2 Driving to the airport on Friday 2

3 What happened Friday? What happened? 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, What did I forget? 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? 3

4 VSL National Metrology Institute (NMI) of the Netherlands Length Temperature and humidity Electricity Time and frequency Viscosity Chemistry Gas flow Optics Mass Liquid flow and volume Ionising radiation Pressure 4

5 Do we need accurate measurement in flow applications? 500 km A B Country A to B 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

6 What do we need for good measurements? 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, cd All flow measurements units traceable to one or more base units (m 3 /s, kg/s, m/s, kg/m 3 mm 2 /s, kg, m 3, 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. 6

7 Instrument calibration Who performs calibration National Metrology Institute, Notified body or other legal authority, Accredited calibration laboratory, Non accredited calibration laboratory, Manufacturer, Owner, Service provider, Others At what moment 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. 7

8 How is measurement organized in the world? BIPM > National Metrology Institutes like VSL OIML > for example NoBo s like NMi-Certin ILAC > accreditation organizations like UKAS ISO > publishing authority for standards like ISO/IEC17043:2010 Proficiency Testing 8

9 How can we compare calibration results? By means of 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. Who organizes comparisons 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 nonaccredited. VSL has an accredited services and organizes comparisons commercially but also for BIPM and Euramet (RMO of Europe) 9

10 Comparisons between National Metrology Institutes BIPM Level for flow CCM-WGFF 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 Metrology Organizations like Euramet Regional round of the Key-Comparisons Bilateral comparisons All kind of other comparisons Including test runs for Key-Comparisons (R&D) 10

11 Key-Comparison CCM.FF-K (1) 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, NMI-J 11

12 Key-Comparison CCM.FF-K (2) Participants 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 Some facts 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. 12

13 On the road Temperature of skid G-forces 13

14 Results Key-Comparison CCM.FF-K for water 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! 14

15 Emerson Calibration Facilities Flow measurement devices need calibrated to ensure the measurements are accurate and traceable to the International System of Units (SI) Boulder, USA Ede, Netherlands Cluj, Romania Flow meters are produced and calibrated all over the world Chihuahua, Mexico Abu Dhabi, UAE Nanjing, China Accuracy of a flow meter should not depend on where it is calibrated Sorocaba, Brazil Singapore Melbourne, Australia 15

16 Emerson Traceability International Mass Standard Standard calibration programs provide vertical traceability National Mass Standard NIST-USA Reference Mass Standard (Emerson or contract service maintained) Working Measurement Standard Micro Motion Gravimetric Primary Flow Stands National Mass Standard CENAM-Mexico Reference Mass Standard (Emerson or contract service maintained) National Mass Standard NIM-Romania Reference Mass Standard (Emerson or contract service maintained) National Mass Standard NIM-China Reference Mass Standard (Emerson or contract service maintained) National Mass Standard VSL-The Netherlands Reference Mass Standard (Emerson or contract service maintained) Traveling Measurement Standard Micro Motion Global Reference Meters PT programs provide horizontal traceability Emerson MMI Boulder, USA Gravimetric Stand Scales Emerson MMI Boulder, USA TSM Stand Reference Meters Micro Motion Inc. Boulder, USA Traceability & Uncertainty ISO NVLAP LAB Code: EPM Tecnologias de Flujo Chihuahua, Mexico TSM Stand Reference Meters EPM Tecnologias de Flujo Chihuahua, Mexico Gravimetric Stand Scales EPM Tecnologias de Flujo Chihuahua, Mexico Traceability & Uncertainty ISO ema LAB Code: FL-28, DEN-23 EPM Flow Technology Center S.R.L. Cluj-Napoca, Romania TSM Stand Reference Meters EPM Flow Technology Center S.R.L. Cluj-Napoca, Romania Gravimetric Stand Scales EPM Flow Technology Center S.R.L. Cluj-Napoca, Romania Traceability & Uncertainty ISO RENAR Cert No: IN PROCESS EPM Flow Technologies Co. Ltd. Nanjing, China TSM Stand Reference Meters EPM Flow Technologies Co. Ltd. Nanjing, China Gravimetric Stand Scales EPM Flow Technologies Co. Ltd. Nanjing, China Traceability & Uncertainty ISO SAC Cert No: LA C CMC Certified-NIM EPM Flow BV Ede, NL Gravimetric Stand Scales EPM Flow BV Ede, NL Traceability & Uncertainty ISO RvA RvA K 153 Certified-VSL LF

17 Comparisons Between Emerson Calibration Labs Previous Current USA USA Netherlands Australia Netherlands NIST VSL 0.035% 0.020% Mexico China CENAM NIM Singapore Romania 0.035% 0.050% China Mexico 17

18 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 Test Meter 3 repeats Flow Rate Sequence Cardinal Rates (5 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% 18

19 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 19

20 VSL Independent Report of Results VSL is ISO/IEC Accredited for Proficiency Testing 20

21 VSL Evaluation of Claimed Uncertainty (CMC) 21

22 Conclusions The results for water mass flow rate of Key- Comparison CCM.FF-K 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. Emerson performs flow meter calibrations that are traceable to the International System of Units (SI). Emerson utilizes VSL as an ISO/IEC 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. Note: CCM.FF-K results are not final yet! 22