Practical experiences with OIML R60

1. Practical experiences with OIML R60 Sascha Mäuselein Oliver Mack

2. Table of contents • Excitation voltage • Force introduction • Material • Types • Embodiment • Eccentricity • Stability of temperature • Air flow • Settling- and Drying-effects

3. Table of contents • Excitation voltage • Force introduction • Material • Types • Embodiment • Eccentricity • Stability of temperature • Air flow • Settling- and Drying-effects

4. Excitation voltage – creep Excitation voltage5 V Z = 5000 Excitation voltage10 V Z < 3000 Creep, DR and error limit of a C3-LC (300g)at 40°C as function of time

5. Excitation voltage – load cell errors Excitation voltage5 V Excitation voltage10 V Load cell errors of a 600 kg LC (C5)

6. Table of contents • Excitation voltage • Force introduction • Material • Types • Embodiment • Eccentricity • Stability of temperature • Air flow • Settling- and Drying-effects

7. Force introduction – material Force introduction made ofstainless steel Y = 20000 Force introduction made ofaluminium Y = 4500 Influence of temperature on MDLO in v for a C3 LC and mpe for Y = 20000 as function of ambient temperature

8. Table of contents • Excitation voltage • Force introduction • Material • Types • Embodiment • Eccentricity • Stability of temperature • Air flow • Settling- and Drying-effects

9. Force introduction – types Force introduction viaplatform n = 1500 Force introduction viasuspension gear n = 3000 Load cell errors of a 8kg single point LC (C3)

10. Table of contents • Excitation voltage • Force introduction • Material • Types • Embodiment • Eccentricity • Stability of temperature • Air flow • Settling- and Drying-effects

11. Force introduction – embodiment Load cell errors of a LC for different punctual force introductions

12. Table of contents • Excitation voltage • Force introduction • Material • Types • Embodiment • Eccentricity • Stability of temperature • Air flow • Settling- and Drying-effects

13. Eccentricity Mpe for class C3 and load cell errors in units of vas function of load for a 8 kg LC

14. Table of contents • Excitation voltage • Force introduction • Material • Types • Embodiment • Eccentricity • Stability of temperature • Air flow • Settling- and Drying-effects

15. Stability of temperature Zero signal of a single point LC (C3, 140kg) in units of vas function of time at 40°C and 85%rH Variation of zero signal of 4 vat a variation of temperature of 2°C

16. Table of contents • Excitation voltage • Force introduction • Material • Types • Embodiment • Eccentricity • Stability of temperature • Air flow • Settling- and Drying-effects

17. Air flow Zero signal of a single point LC (C3, 140kg) in units of vas function of time at 41°C and 85%rH Variation of zero signal of 0,5 v

18. Air flow Reduction ofair flow by a tent Zero signal of a single point LC (C3, 140kg) in units of vas function of time at 41°C and 85%rH; LC in tent Variation of zero signal of 0,02 v  Reduction by a factor of 25

19. Table of contents • Excitation voltage • Force introduction • Material • Types • Embodiment • Eccentricity • Stability of temperature • Air flow • Settling- and Drying-effects

20. Settling- and drying-effects 1. first creep measurement at 20°C;after delivery 2. first creep measurement at 40°C -> failed -> failed

21. Settling- and drying-effects 3. first creep measurement at -10°C 4. repeat of creep measurement at 20°C -> passed -> passed

22. 3 days storingat 40°C Settling- and drying-effects 5. repeat of creep measurement at 40°C 6. further creep measurement at 40°Cafter 3 days storing at 40°C -> passed -> failed

23. Table of contents • Excitation voltage -> Creep and LC error • Force introduction • Material -> Zero point (Y) • Types -> LC error • Embodiment -> LC error • Eccentricity -> LC error • Stability of temperature -> Zero signal, LC signal • Air flow -> Zero signal, LC signal • Settling- and Drying-effects -> Creep

24. Thank you for your attention Practical experiences with OIML R60 Sascha Mäuselein Oliver Mack