National Institute of Metrological Research

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1 National Institute of Metrological Research EVALUATION OF THE TRANSMILLE MOD. 808 HIGH PRECISION DIGITAL MULTIMETER BY THE INRIM CALIBRATION LABORATORY OF MULTIFUNCTION ELECTRICAL INSTRUMENTS F. Galliana, M. Lanzillotti INRIM technical report 23/6 July 6 visto Responsabile STALT (Vito Fernicola)

2 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision CONTENTS Pag. TITLE AND SUMMARY TITOLO E SOMMARIO. INTRODUCTION 2. THE TRANSMILLE MOD. 808 HIGH PRECISION DMM 3. GRAPHICAL RESULTS 3. Results for DC Voltage. 3.2 Results for AC Voltage. 3.3 Results for DC Current. 3.4 Results for AC Current. 3. Results for DC Resistance. 4. DATA ANALYSIS 4. DC Voltage. 4.2 AC Voltage. 4.3 DC Current. 4.4 AC Current. 4. DC Resistance.. CONCLUSIONS REFERENCES. Annex. Specifications of the TRANSMILLE MOD. 808 DMM. Annex 2: Image of the TRANSMILLE mod. 808 DMM. Annex 3: Measurement results for DC Voltage. Annex 4: Measurement results for AC Voltage. Annex : Measurement results for DC Current. Annex 6: Measurement results for AC Current. Annex 7: Measurement results for DC Resistance Annex 8: Measurement results for High Currents F. Galliana, M. Lanzillotti pag. of 44

3 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision TITLE AND SUMMARY EVALUATION OF THE HIGH PRECISION TRANSMILLE MOD. 808 DIGITAL MULTIMETER BY THE INRIM CALIBRATION LABORATORY OF MULTIFUNCTION ELECTRICAL INSTRUMENTS This report describes the work made by the laboratory of calibration of electrical multifunction automatic instruments of the National Institute of Metrological Research (INRIM) concerning the metrological verification of a high precision TRANSMILLE mod. 808 digital multimeter (DMM) recently produced in order to assess its accuracy and stability compared with its specifications. The instrument was tested in a six months period in the five basic electrical low frequency fundamental quantities (dc and ac voltage and current and dc resistance). Its stability and precision were compared with its accuracy manufacturer specifications and a performance index of the DMM was evaluated for each examined measurement point. The DMM showed to be in agreement with its specifications so it can be considered at the level of other top-class DMMs and in some measurements points its specifications are even better. In addition, its high current (up to 30 A range), low currents (down to 0 na range) DC Resistance up to 2 T functions are useful and not available in other DMMs. Technical dealing with TRANSMILLE was satisfactory. TITOLO E SOMMARIO VALUTAZIONE DEL MULTIMETRO NUMERALE DI ELEVATA PRECISIONE TRANSMILLE MOD. 808 TRANSMILLE MOD. 808 DA PARTE DEL LABORATORIO DI TARATURA DI STRUMENTI ELETTRICI MULTIFUNZIONE DELL INRIM In questo rapporto tecnico si descrive il lavoro svolto dal laboratorio di taratura di strumenti elettrici automatici multifunzione dell Istituto Nazionale di Ricerca Metrologica (INRIM) riguardante la verifica metrologica di un multimetro commerciale di elevata accuratezza TRANSMILLE mod. 808 di recente produzione al fine di valutarne l accuratezza e la stabilità in confronto con le specifiche. Lo strumento è stato verificato nell arco di sette mesi nelle cinque grandezze elettriche fondamentali in bassa frequenza (tensione e corrente continue ed alternate e resistenza in corrente continua). Le sue stabilità e precisione sono state confrontate con le specifiche di accuratezza dichiarate dal costruttore ed è stato valutato un indice di prestazione del multimetro per ogni punto di misura esaminato. Il multimetro ha dimostrato di rispettare le proprie specifiche così da poter esser considerato al livello di altri multimetri di classe elevata ed in alcuni punti di misura le sue specifiche sono perfino migliori. Inoltre le funzioni di corrente fino a 30 A, basse correnti (fino al campo 0 na) e resistenza fino a 2 T sono molto utili e non disponibili negli altri multimetri. La collaborazione tecnica con la TRANSMILLE è stata soddisfacente... INTRODUCTION Since the late eighties, high precision electrical electronic instruments, such as digital multimeters (DMMs) and multifunction calibrators (MFCs, are used by calibration and industrial laboratories in the five basic electrical low frequency quantities (direct and alternating Voltages and Currents and in direct current Resistance), both as Reference or Working Standards. Consequently, the process of traceability transfer from the Primary or National Institutes (NMI) has changed significantly [ 4]. In addition, in modern electrical calibration laboratories a high precision DMM could play a strategic F. Galliana, M. Lanzillotti pag. 2 of 44

4 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision role not only as simple instrument to calibrate customer s sources or standards but also as main laboratory reference Standard or instrument to transfer the traceability from National Standards. To meet the need of calibration of DMMs and MFCs, the National Metrological Institute (INRIM) set up since the early nineties a high performance laboratory (INRIM-Lab) to calibrate these instruments. The calibration system of the INRIM-Lab consists of a group of reference standards (shown in detail in Fig. ), such as 0 V Zener voltage reference standard, a DMM calibrated in linearity and used as voltage divider and an automated DC Voltage divider, a set of standard resistors and shunts, and a programmable ac/dc voltage transfer standard, which are periodically calibrated vs the national Standards. The system also includes three MFCs, used as working instruments, and some other auxiliary instruments used to extend the measurement fields. The calibration of DMMs and MFCs implies an adjustment and a verification in which the measurements of these instruments are compared with the INRIM-Lab reference Standards. INRIM-Lab systems typically calibrate highstability DMMs, MFCs and DC Voltage calibrators. National Standards Standard Resistors (0,02 00M ) DCV reference 0 V ACV/DCV Transfers AC/DC shunts (ma 0A DMM as DCV Divider DCV automated INRIM divider MFC MFC2 MFC3 Multif. Transfer Standard DMMs MFCs Fig.. Traceability chain from national Standards of the INRIM-Lab. F. Galliana, M. Lanzillotti pag. 3 of 44

5 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision 2. THE TRANSMILLE MOD. 808 HIGH PRECISION DMM TRANSMILLE was founded in 99 as a commercial calibration service, and soon after began to develop and manufacture a range of electrical calibration products and software to answer a growing requirement for solutions to common problems. Successively TRANSMILLE worked to provide unique equipment and software for not only our own laboratory but also for calibration laboratories and manufacturers. Now TRANSMILLE produces more than 600 calibration instruments per year, for National Laboratories to small calibration and test houses. One of the top TRANSMILLE instruments is now the 8. digit mod. 808 DMM, that TRANSMILLE evaluates at the same level of the best now commercially available as the J. Fluke mod. 808 and the Agilent/HP 348A. Manufacturer declares that the 808 s main features are: Precision: 4 ppm, resolution: 8. digit; Voltages AC / DC up to 000V; Currents AC / DC up to a 30 A; Resistance measurements from to 2 T with measurement voltage up to 300 V; Electrometer function for high value resistance measurements at low current and low noise; Platinum thermo-resistance (PRT) measurement function at two, three and four wires with ITS90 Callendar van Dusen linearization; Rear panel input terminals; Advanced ratio functions as adjusted value and absolute ratio; Simultaneous temperature and resistance display for metrological confirmation of PRT probes; Thermocouple measurements with display to C, F and K; Dedicated pressure module interface (Option). The DMM can display other interesting features as the visualization of the measurements standard deviation, the maximum and minimum readings, the measurement accuracy and a dynamic uncertainty that are interesting and innovative features. Nevertheless, a DMM user cannot completely trust in this uncertainty evaluation as this parameter depends by many factors and if a laboratory is accredited its uncertainty is linked to its calibration procedures and to its accredited uncertainty. In Annex manufacturer specifications in the five low frequency electrical quantities are reported. TRANSMILLE sent to INRIM a first version of the 808 DMM for evaluation. On this occasion some technical changes were suggested to be made to the instrument, for example to the input terminals that TRANSMILLE correctly implemented. A new version of the DMM was successively re-sent for evaluation to the INRIM-Lab. The DMM was periodically verified by F. Galliana, M. Lanzillotti pag. 4 of 44

6 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision comparison with the Standards of the INRIM-Lab for a period of six months without performing the adjustment to evaluate its time stability with respect to its specifications. 3. GRAPHICAL RESULTS As previously said, the TRANSMILLE mod. 808 DMM was verified in the five fundamental low frequency electrical quantities comparing it with a MFC J. Fluke 700 A of the INRIM-Lab in turn calibrated vs. the Reference Standards of the INRIM-Lab. To facilitate the comprehension of the measurements data, in Figures 2 to 33 are shown in graphical form the results obtained as relative deviation from the applied values. For some significant values a comparison of the results vs. the declared 80-days DMM accuracy specification was also added. 3. Results for DC Voltage. In Figures from 2 to 6 the verification results for DC Voltage are graphically shown. 00 mv range 0 0 mv Relative deviation from applied value ( 0-6 ) 0-0mV 00mV -00mV -0 mv Fig. 2. Relative deviations from applied standard values in the 00 mv range. F. Galliana, M. Lanzillotti pag. of 44

7 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision Relative deviation from applied value ( 0-6 ) V range V -V 0. V V -V -3 Fig. 3a). Relative deviations from applied standard values in the V range. Relative deviation from applied value ( 0-6 ) V Fig. 3b). Relative deviations from applied standard values at V compared with the 80-days DMM specifications. V -V spec. spec. F. Galliana, M. Lanzillotti pag. 6 of 44

8 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision Relative deviation from applied value ( 0-6 ) V range 2V -2V 3V 4V 6V 8V 0V -0V Fig. 4a). Relative deviations from applied standard values in the 0 V range. 0 V 0V Relative deviation from applied value ( 0-6 ) V spec. spec. Fig. 4 b). Relative deviations from applied standard values at 0 V Compared with the 80-days DMM specifications. F. Galliana, M. Lanzillotti pag. 7 of 44

9 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision Relative deviation from applied value ( 0-6 ) V range V - V 0 V 00 V -00 V Fig.. Relative deviations from applied standard values in the 00 V range. Relative deviation from applied value ( 0-6 ) V range 0 V -0 V 400 V 600 V 800 V 000 V -000 V Fig. 6. Relative deviations from applied standard values in the 000 V range. 3.2 Results for AC Voltage In Figures from 7 to the verification results for AC Voltage are graphically summarized. F. Galliana, M. Lanzillotti pag. 8 of 44

10 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision Relative deviation from applied value ( 0 6 ) 00 mv range at khz mv 80 mv mv 40 0 mv 0 00 mv Fig. 7. Relative deviations from applied standard values in the 00 mv range at khz. 00 mv multiple frequencies deviazione relativa rispetto val appl. (x0 - ) Hz khz khz Fig. 8. Relative deviations from applied standard values at 00 mv at multiple frequencies. V range multiple frequencies Relative deviation from appl. value. (x0 - ) V khz 0.V khz V 40 Hz V khz V khz V 00kHz V 300kHz V MHz Fig. 9. Relative deviations from applied standard values in the V range at multiple frequencies. F. Galliana, M. Lanzillotti pag. 9 of 44

11 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision Relative deviation from applied value ( 0 6 ) V multiple frequencies khz khz 00kHz 0kHz Fig. 0a). Relative deviations from applied standard values at 0 V at multiple frequencies. 40hz Relative deviation from applied value ( 0 6 ) V khz Fig. 0b). Relative deviations from applied standard values at 0 V khz compared with the 80-days DMM specifications. 0V range at khz khz specif specif Relative deviation from applied value ( 0 6 ) V 4 V 6 V 8 V Fig.. Relative deviations from applied standard values in the 0 V range at khz. F. Galliana, M. Lanzillotti pag. 0 of 44

12 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision 00V range at khz Relative deviation from applied value ( Fig. 2. Relative deviations from applied standard values in the 00 V range at khz. V 40 V 60 V 00V multiple frequencies lative deviation from applied value ( 0 6 ) Fig. 3. Relative deviations from applied standard values at 00 V at multiple frequencies. 40 Hz khz khz 0 khz 000 V range multiple frequencies Relative deviation from applied value ( 0 6 ) V khz 300 V khz 400 V khz 600 V 40Hz 600 V khz Fig. 4. Relative deviations from applied standard values in the 000 V range at multiple frequencies. F. Galliana, M. Lanzillotti pag. of 44

13 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision Relative deviation from applied value ( 0 ) V multiple frequencies Fig.. Relative deviations from applied standard values at 000 V at multiple frequencies. 40Hz khz khz 30 khz 3.3 Results for DC Current. In Figures from 6 to 22 the verification results for DC Current are graphically summarized. Relative deviation from appl. value. (x0-) A range 0 ua 00 ua -00 ua Fig. 6. Relative deviations from applied standard values in the 00 A range. F. Galliana, M. Lanzillotti pag. 2 of 44

14 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision Relative deviation from appl. value. (x0 - ) ma range 0. ma ma - ma Fig. 7. deviations from applied standard values in the ma range. Relative deviation from appl. value (x0 - ) ma range ma 0 ma -0 ma Fig. 8a). deviations from applied standard values in the 0 ma range. F. Galliana, M. Lanzillotti pag. 3 of 44

15 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision Relative deviation from appl. value (x0 - ) ma specif 0 ma -0 ma specif -0 - Fig. 8b). Relative deviations from applied standard values at 0 ma compared with the 80-days DMM specifications. 00 ma range Relative deviation from appl. val. (x0-6 ) mA ma 0 ma 00 ma -00 ma Fig. 9. Relative deviations from applied standard values in the 00 ma range. F. Galliana, M. Lanzillotti pag. 4 of 44

16 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision A range Relative deviation from appl. val.lue. (x0-6 ) A 23 A 2 0. A A - A Fig.. Relative deviations from applied standard values in the A range. Relative deviation from applied value ( 0 6 ) A range A -0 A Fig. 2. Relative deviations from applied standard values in the 0 A range. Relative deviation from applied value ( 0 6 ) DC Current 30 A range A - A Fig. 22. Relative deviations from applied standard values in the 30 A range. F. Galliana, M. Lanzillotti pag. of 44

17 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision 3.4 Results for AC Current. In Figures from 23 to 30 the verification results for AC Current are graphically summarized. Relative deviation from appl. value (x0-4 ) A range Fig. 23. Relative deviations from applied standard Values in the 00 A range at multiple frequencies. 00 ua khz 00 ua 300 Hz 00 ua 40 Hz Relative deviation from appl. value (x0 ) ma range ma khz makhz ma 300Hz ma40 Hz Fig. 24. Relative deviations from applied standard values in the ma range at multiple frequencies. F. Galliana, M. Lanzillotti pag. 6 of 44

18 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision 0 Relative deviation from appl. val (x0 - ) ma range 0 ma khz 0mA khz 0 ma 300 Hz 0 ma 40 Hz Fig. 2. Relative deviations from applied standard values in the 0 ma range at multiple frequencies. Relative deviation from appl. (x0 ) ma range khz ma 30 ma ma Fig. 26. Relative deviations from applied standard values in the 00 ma range at khz. F. Galliana, M. Lanzillotti pag. 7 of 44

19 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision 00 ma multiple frequencies Relative deviation from appl. value (x0 ) Hz 300 Hz khz khz Fig. 27a). Relative deviations from applied standard values at 00 ma at multiple frequencies. 00 ma khz Relative deviation from appl. value (x0 ) khz specif specif Fig. 27b). Relative deviations from applied standard values at 00 ma, khz compared with the 80-days DMM specifications. A range Relative deviation from appl. value (x0 ) A khz A 40 Hz A 300 Hz A khz A khz Fig. 28. Relative deviations from applied standard values in the A range at multiple frequencies. F. Galliana, M. Lanzillotti pag. 8 of 44

20 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision 0 A range Relative deviation from applied value ( 0 6 ) Fig. 29. Relative deviations from applied standard values in the 0 A range at multiple frequencies. 0 A 40 Hz 0 A 300 Hz 0 A khz 0 A khz Relative deviation from applied value ( 0 6 ) A range A khz A 300 Hz A 40 Hz A khz Fig. 30. Relative deviations from applied standard values in the 30 A range at multiple frequencies. 3. Results for DC Resistance. Figures from 3 to 33 the verification results for DC Resistance are graphically summarized. F. Galliana, M. Lanzillotti pag. 9 of 44

21 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision Relative deviation from applied value (x0-6 ) ranges ohm 0 ohm range 00 ohm 0 ohm ohm Fig. 3a). Relative deviations from applied standard values in the, 0 and 00 ranges. Relative deviation from applied value (x0-6 ) specif ohm Fig. 3b). Relative deviations from applied standard values at compared with the 80-days DMM specifications. F. Galliana, M. Lanzillotti pag. of 44

22 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision 2 Relative deviation from applied value (x0-6 ) k ranges kohm 0 kohm range 00 kohm" 0 kohm kohm range 0 kohm kohm 0. kohm range kohm Fig. 32a). Relative deviations from applied standard values in the k, 0 k and 00 k ranges Relative deviation from applied value (x0-6 ) k. specif 0 kohm Fig. 32b). Relative deviations from applied standard values at 0 k compared with the 80-days DMM specifications. F. Galliana, M. Lanzillotti pag. 2 of 44

23 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision M ranges Relative deviation from applied value (x0-6) range. range Fig. 33. Relative deviations from applied standard values in the M and 0 M ranges DATA ANALYSIS In Tables to the values obtained, expressed as relative deviations with respect to the applied standard values, are compared with the manufacturer specifications at 80 days. From column to 8 are shown respectively: the range, the measurement value, the frequency (for alternating quantities), the 80 days manufacturer specification, the deviation between the first and the last verification (fin-first), the max deviation from the applied standard value in absolute value max_abs, the relative uncertainty of the applied reference values and a DMM performance index evaluated as follows: pi = max abs U U 2 INRIM where U 808 is the 80-days accuracy specifications of the DMM while U INRIM is the expanded calibration uncertainty of the INRIM-Lab measurements. The performance can be considered satisfactory if pi. () F. Galliana, M. Lanzillotti pag. 22 of 44

24 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision 4. DC Voltage. range 00 mv V 0 V Table. 808 DMM performance in DC Voltage. Value 80 days spec. freq. (mv) ( 0 6 ) fin first ( 0 6 ) max abs ( 0 6 ) U INRIM ( 0 ) V ( 0 6 ) pi For these values the pi cannot be considered completely significant as the DMM declared 80-days specification is smaller than the INRIM capability, that comprehends the uncertainties of National standards, those of the traceability transfer to the MFC J. Fluke 700 A of the INRIM-Lab and its one year use uncertainty []. F. Galliana, M. Lanzillotti pag. 23 of 44

25 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision Value range (V) 00 V freq. 80 days spec. ( 0 6 ) fin first ( 0 6 ) max abs ( 0 6 ) U INRIM ( 0 6 ) pi V AC Voltage. Table 2: 808 DMM performance in AC Voltage. range 00 mv Value (mv) freq. (khz) days spec. ( 0 ) fin first ( 0 ) max abs ( 0 ) U INRIM ( 0 ) pi F. Galliana, M. Lanzillotti pag. 24 of 44

26 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision range Value (V) freq. (khz) 80 days spec. ( 0 ) fin first ( 0 ) max abs ( 0 ) U INRIM ( 0 ) pi V 0 V 00 V F. Galliana, M. Lanzillotti pag. 2 of 44

27 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision range 000 V Value (V) freq. (khz) days spec. ( 0 ) fin first ( 0 ) max abs ( 0 ) U INRIM ( 0 ) pi F. Galliana, M. Lanzillotti pag. 26 of 44

28 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision 4.3 DC Current. range 00 A ma 0 ma 00 ma A 0 A Value ( A) freq. (khz) Table 3: 808 DMM performance in DC Current. 80 days spec. fin first max-abs U INRIM ( 0 ) ( 0 ) ( 0 ) ( 0 ) ma ( 0 6 ) ( 0 6 ) ( 0 6 ) ( 0 6 ) pi These performance values were evaluated taking into account fin-first instead of max-abs as the declared accuracy in these points is presumably too small. 3 These performance values were evaluated taking into account fin-first instead of max-abs as presumably a systematic error in the DMM adjustment process happened. F. Galliana, M. Lanzillotti pag. 27 of 44

29 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision range 30 A Value (A) freq. (khz) 80 days spec. ( 0 6 ) fin-first ( 0 6 ) max-abs ( 0 6 ) U INRIM pi ( 0 6 ) AC Current. range 00 A ma 0 ma 00 ma Value ( A) freq. (khz) days spec. ( 0 4 ) Table 4: 808 DMM performance in AC Current. fin-first ( 0 4 ) max-abs ( 0 4 ) U INRIM ( 0 4 )... ma ( 0 ) ( 0 ) ( 0 ) ( 0 ) pi F. Galliana, M. Lanzillotti pag. 28 of 44

30 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision range A 0 A 30 A Value (A) (A) (A) (A) freq. (khz) days spec. ( 0 ) 86 3 ( 0 6 ) ( 0 6 ) fin first ( 0 ) ( 0 6 ) ( 0 6 ) max-abs ( 0 ) ( 0 6 ) ( 0 6 ) U INRIM ( 0 ) ( 0 6 ) ( 0 6 ) pi These measurement points were evaluated although outside the 808 DMM specifications and considering the same specification value at khz. F. Galliana, M. Lanzillotti pag. 29 of 44

31 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision 4. DC Resistance. Table : 808 DMM performance in DC Resistance. Range ( ) 0 00 (k ) 0 00 Value ( ) (k ) freq. 80 days spec. ( 0 6 ) fin first ( 0 6 ) max abs ( 0 6 ) U INRIM ( 0 6 ) 0 pi (M ) 0 (M ) F. Galliana, M. Lanzillotti pag. 30 of 44

32 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision CONCLUSIONS In this report the TRANSMILLE mod. 808 high precision DMM was evaluated by the INRIM- Lab for multifunction programmable instruments calibration in a six-months period. The DMM showed a satisfactory stability and a good agreement with the declared accuracy specifications that are at the level and somewhere even better than other top-class 8. digits DMMs. 808 high Currents (up to 30 A range), low Currents (down to 0 na range) DC Resistance up to 2 T functions are very useful and not available in other DMMs Only the 0mA and 00 ma DC current ranges have to be further verified either as declared accuracy and in the adjustment process. In the 0 A and 30 A ranges in AC Current, the DMM was evaluated also at khz showing a satisfactory stability. Hence, an evaluation of the specification values for these points could be made by TRANSILLE and successively added to the current 808 DMM specifications. REFERENCES [] G. C. Bosco, G. La Paglia, U. Pogliano, G. Zago, A system for traceability maintenance and verification based on high stability multimeters, Proc XIII IMEKO World Congress, Torino, 994, pp [2] U. Pogliano, G. C. Bosco, R. Cerri, G. La Paglia, An alternative approach to ensure traceability utilizing high stability multimeters, Proc. Métrologie 97, Nimes, France, 99, pp [3] G. C. Bosco, R. Cerri, C. Cassiago, G. La Paglia, and U. Pogliano, Investigation on the use of multifunction programmable instruments, in Proc. X IMEKO TC4 Symp., 998, pp [4] C. Cassiago, G. La Paglia, U. Pogliano, Stability Evaluation of High Precision Multifunction Instruments for Traceability Transfer. IEEE Trans. Meas., Vol. 49 no. 6, pp. 6, December 00. [] W. Bich, F. Pennecchi, On the in-use uncertainty of an instrument, in: P. Ciarlini, M. G. Cox, E. Filipe, F. Pavese, D. Richter (Eds), Advanced Mathematical & Computational Tools in Metrology, World Scientific, Singapore, 04, pp F. Galliana, M. Lanzillotti pag. 3 of 44

33 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision Annex : Specifications of the TRANSMILLE mod. 808 DMM. F. Galliana, M. Lanzillotti pag. 32 of 44

34 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision F. Galliana, M. Lanzillotti pag. 33 of 44

35 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision F. Galliana, M. Lanzillotti pag. 34 of 44

36 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision F. Galliana, M. Lanzillotti pag. 3 of 44

37 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision F. Galliana, M. Lanzillotti pag. 36 of 44

38 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision F. Galliana, M. Lanzillotti pag. 37 of 44

39 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision Annex 2: Image of the TRANSMILLE mod. 808 DMM. F. Galliana, M. Lanzillotti pag. 38 of 44

40 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision Annex 3: Measurement results for DC Voltage. measurement days (mv) Portata (mv) (V) (V) V V V V V F. Galliana, M. Lanzillotti pag. 39 of 44

41 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision Annex 4: Measurement results for AC Voltage. Valore f measurement days (mv) (khz) (mv) (0-) (0-) (0-) (0-) (0-) (0-) (0-) (0-) (0-) (0-) (0-) , (V) (khz) (V) , , , , , F. Galliana, M. Lanzillotti pag. 40 of 44

42 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision Annex : Measurement results for DC Current. applicata Corrente 0 (0-) (0-) (0-) (0-) (0-) (0-) (0-) (0-) (0-) (0-) (0-) measurement days (ma) (ma) (ma) (ma) (0-6) (0-6) (0-6) (0-6) (0-6) (0-6) (0-6) (0-6) (0-6) (0-6) (0-6) (A) (A) F. Galliana, M. Lanzillotti pag. 4 of 44

43 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision Annex 6: Measurement results for AC Current. measurement days Valore f (ma) (khz) (ma) (0-4) (0-4) (0-4) (0-4) (0-4) (0-4) (0-4) (0-4) (0-4) (0-4) (0-4) , , (ma) (khz) (ma) (0-) (0-) (0-) (0-) (0-) (0-) (0-) (0-) (0-) (0-) (0-) , , (khz) (ma) (0-) (0-) (0-) (0-) (0-) (0-) (0-) (0-) (0-) (0-) (0-) , , (khz) (ma) (0-) (0-) (0-) (0-) (0-) (0-) (0-) (0-) (0-) (0-) (0-) , , (A) (khz) (A) , , F. Galliana, M. Lanzillotti pag. 42 of 44

44 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision Annex 7: Measurement results for DC Resistance ( ) ( (0-6) (0-6) (0-6) (0-6) (0-6) (0-6) (0-6) (0-6) (0-6) (0-6) (0-6) (k ) (k ) (0-6) (0-6) (0-6) (0-6) (0-6) (0-6) (0-6) (0-6) (0-6) (0-6) (0-6) (M ) (M ) F. Galliana, M. Lanzillotti pag. 43 of 44

45 report 23/6 July 6 Evaluation of the TRANSMILLE mod. 808 high precision Annex 8: Measurement results for High currents. 0 A range port 0 A (0-6 ) (0-6 ) (0-6 ) f (0-6 ) (0-6 ) (0-6 ) (khz) port 0 A , , A range (0-6 ) (0-6 ) (0-6 ) f (0-6 ) (0-6 ) (0-6 ) (khz) , , F. Galliana, M. Lanzillotti pag. 44 of 44

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