TBTAK Interlaboratory Comparison for the CalibrationVerification of Material

TÜBİTAK Interlaboratory Comparison for the Calibration/Verification of Material Testing Machines Dr. Sinan FANK TUBITAK UME 02. 04. 2013 GULFMET ILC Wrokshop, Dubai, UAE

Contents of ILC TÜBİTAK q ILC for calib. /Verif. of material testing machines § Planning of ILC of MTM calibration/verification § Determination of the needs of ILC of MTM calibration/verification § Determination of Transfer Standards § Preperation Technical Protocol § Invitation to the Accredited laboratories § Time schedule q Measurements and evaluations § Assigned value § Evaluation criteria (En) q Reporting

Planning TÜBİTAK q Laboratories requires to participate an interlaboratory comparison (ILC) with UME. o to evaluate their performances to meet the ISO/IEC 17025 requirements o to meet the TÜRKAK requirements q TÜRKAK requires UME to organize ILCs for Accredited Labs. o To monitor the performances of Accredited Labs. Accredited Calibration Laboratories in Turkey : 79 Laboratories Scope on Verification of MTMs : 24 3

Material testing machine for ILC TÜBİTAK Device : Material testing machine Manufacturer : ZWICK Type : Compression&tension Model : Z 250 / 2006 Serial No : 12305 TUBITAK UME material testing machine (MTM) was used as a verification device for the ILC measurements 4

MTM during ILC measurements TÜBİTAK Material Testing Machine and Calibration System (indicator + load cell)

ILC Force ranges TÜBİTAK ILC Force ranges and force application methods Measuring range Force application mode Force method 100 N Tension With dead weight 1 k. N Tension With force transducer 100 k. N Compression With force transducer

ILC Measurement method TÜBİTAK For the interlaboratory comparison of material testing machine (MTM), below rules are applied; • Each participated laboratory will calibrate/verify the MTM of UME using their own procedure written according to ISO 7500 -1 standard, • Each laboratory will use their own reference standards (force transducer, indicator and etc), • Each laboratory will use their own adaptors and aparatus for the mounting of their transducers into the MTM.

Travelling Standard TÜBİTAK

Announcement TÜBİTAK ü By publishing on website of TUBITAK UME www. ume. tubitak. gov. tr ü By sending e-mail to all Calibration Laboratories ü Accredited Lab. ü Not accredited Lab. Allowed 1 months for the application! 9

Participants TÜBİTAK 4 Different accredited calibration laboratories applied for the comparison Time schedule Technical Protocol Rev. 01 10

Technical Protocol: Contents TÜBİTAK 1. Scope 2. Participants 3. Time Schedule 4. Confidentiality 5. Insurance 6. Preliminary control 7. Measurement instuctions Appendix: A List of Participants B Checklist Form before measurements C Table for Measurement Result D Evaluation of results E Graphs and tables for results 8. Final control 9. Reporting the Results 10. Evaluation criteria (En) 11. References 11

Technical Protokol TÜBİTAK

TP: Participants TÜBİTAK • Number of particiants: 4 Laboratory Name Contact Person Address TÜBİTAK UME Dr. Bulent Barış Mah. AYDEMIR Dr. Zeki Acar Cad. Force No: 1 41470 Gebze Laboratory (Coordinator) KOCAELİ TÜBİTAK UME Phone No / Extension Fax No E-mail Address 262 679 5650 / 5600 262 679 5001 bulent. aydemir @ tubitak. gov. tr LAB 1 LAB 2 LAB 3 LAB 4 13

Participated laboratories TÜBİTAK

Time Schedule-1 TÜBİTAK UME LAB 1 LAB 2 UME LAB 3 LAB 4 Technical Protocol Rev. 01 UME *one day for each laboratory 15

TP: Time Schedule - 2 TÜBİTAK Laboratory Location Measurement Date TÜBİTAK UME KOCAELİ 20. 04. 2010 LAB 1 İSTANBUL 27. 04. 2010 LAB 2 ANKARA 04. 05. 2010 TÜBİTAK UME KOCAELİ 11. 05. 2010 LAB 3 KAYSERİ 21. 05. 2010 LAB 4 İSTANBUL 25. 05. 2010 TÜBİTAK UME KOCAELİ 08. 06. 2010 16

TP: Confidentiality TÜBİTAK Ø A random code will be given for each Laboratories. Ø Laboratory code will sent to its contact person. Ø Laboratories will be represented by these codes in the Comparison Report. 17

TP: Insurance TÜBİTAK Ø Laboratories are responsible for Ø the costs for insurance of the shipment to their standards, Ø any damage that may occur during their measurements. 18

TP: Checklist Form TÜBİTAK Check List Form Before measurements □ Verticality of the machine □ Hardness of compression table □ Straightness of the tables □ Paralelesim of the moving table □ Alignment of the tension bars □ Technical Protocol 19

TP: Preliminary Control of MTM TÜBİTAK Ø After 1 hour warm-up time, before performing the measurements, Ø Crosshead of the MTM is runned with different speed, Ø Limit switches are checked and adjusted for undesired movement of the crossheads and preventing the damage of the MTM Ø In case of preliminary test is failed measurements are stopped and waited up to solving of pilot lab. 20

TP: Measurement Instructions TÜBİTAK Ø Calibration/verification and uncertainty of material testing machines according to EN ISO 7500 -1 standard. 21

TP: Mounting the Force transdcuers into MTM TÜBİTAK Calibration/verification procedure acc. To EN ISO 7500 -1 1. Alignment of the force-proving instrument 2. Conditioning of the testing machine (at least three times preloading) 3. Aplication of verification procedure • Three series of measurements shall be taken with increasing force. • For machines applying not more than five discrete levels between 20 % and 100 % of the maximum range of the scale. • The force-proving instrument may be rotated through an angle of 120° before each series of measurements and a preload run undertaken

TP: Reporting the Results TÜBİTAK Ø Each lab. calculates the error of calibration of MTM according to EN ISO 7500 -1 • Relative accuracy error • Relative repeatability error • Relative zero error • Relative resolution error • Relative reversibility error Ø Each lab. calculates the uncertainty acc. to EN ISO 7500 -1 (k=2, %95) Ø Reporting the results on their calibration certificate form Ø Sending the reports to the Coordinator within 2 weeks

Calculatilon of measurement uncertainty TÜBİTAK

TP: Evaluation TÜBİTAK Ø Declared that, assigned value XREF will be calculated using UME results. Ø En score will be used for the evaluation. │En│≤ 1. 0 “satisfactory” performance │En│> 1. 0 “unsatisfactory” performance 25

Results TÜBİTAK 26

Results TÜBİTAK 27

Results TÜBİTAK 28

Results TÜBİTAK 29

En score TÜBİTAK Ø │En│≤ 1. 0 “satisfactory” performance Ø │En│> 1. 0 “unsatisfactory” performance 30

En score TÜBİTAK

En score TÜBİTAK

Control of Results TÜBİTAK Ø Excel sheet containing participant result only were sent to corresponding participant to be controlled. Ø It is declared that, after publishing the report, any requests to make changes in results were not accepted, except errors due to mistyping by UME. 33

Comparison Report TÜBİTAK Ø Draft A Report 01. 11. 2010 Ø Draft B Report 01. 12. 2010 Ø Final Report 07. 01. 2011 34

Comparison Report TÜBİTAK 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. Introduction Pilot Laboratory Participants Organization and Schedule Travelling Standard Deviations from the Protocol Measurement Comparison Points Environmental Conditions Calibration Method Behavior of Traveling Standard Reference Value Evaluation Comparison Results 35

TÜBİTAK Thank you very much for your attention TÜBİTAK Ulusal Metroloji Enstitüsü TÜBİTAK Gebze Yerleşkesi, Dr. Zeki Acar Caddesi, P. K. 54, 41470, Gebze – Kocaeli Tel: 262 679 50 00 Faks: 262 679 50 01 www. ume. tubitak. gov. tr E-mail: sinan. fank@tubitak. gov. tr