TY - CONF A1 - Melzer, Michael ED - Deschermeier, Regina ED - Bünger, Lars ED - Schüür, Jens T1 - Good practice für digitale Kalibrierscheine von Temperatur- und Feuchtemessgrößen N2 - Der digitale Kalibrierschein (DCC) enthält alle Informationen eines herkömmlichen Kalibrierscheins in maschinenlesbarer und möglichst auch -interpretierbarer Form, um eine Automatisierung des Qualitätsmanagements und der metrologischen Rückführbarkeit in den Laboren und im industriellen Messwesen zu ermöglichen. Neben den allgemeinen Anforderungen, z.B. aus ISO/IEC 17025, gibt es spezifische Anforderungen bezüglich der Messgrößen und der Kalibrierverfahren, die auch in digitalen Ergebnisberichten erfüllt sein müssen. Innerhalb des DKD Fachausschusses für Temperatur und Feuchte werden derzeit good practice Empfehlungen erarbeitet, um zu definieren, wie genau diese Anforderungen im Rahmen des DCC erfüllt werden sollten. Anhand der Temperaturskala und des Kalibriermediums werden zwei dieser good practices hier beispielhaft erläutert. Außerdem wird eine Übersicht über die bereits definierten spezifischen refType-Attribute für Temperatur- und Feuchtemessgrößen gegeben. T2 - TEMPERATUR 2024 CY - Berlin, Germany DA - 05.06.2024 KW - Digital Calibration Certificate KW - Digital certificates KW - Digital Metrology KW - QI-Digital KW - Calibration PY - 2024 UR - https://www.temperatur.ptb.de/startseite SP - 145 EP - 151 AN - OPUS4-61923 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Melzer, Michael T1 - Good practice definitions for DCCs on temperature- and humidity quantities N2 - Automation in metrological traceability of measurements bears high potential for a more effective quality management with less human interaction and reduced risks from manual data processing. However, this can only be achieved, if the metrological data from the calibration service is provided in a machine-readable and machine-interpretable format. With the provision of an XML-schema for digital calibration certificates (DCCs), PTB has defined a comprehensive frame for machine-readable reports that is applicable to calibrations of arbitrary quantities and methods. In order to increase the interoperability of DCCs, further harmonization needs to be established, especially within the communities of specific measurement quantities. This allows for a straight-forward automation in the processing of DCCs independent from the issuing laboratory. Recently, the German Calibration Service (DKD) has started to compile quantity-specific as well as overarching good practice definitions for DCCs in its various technical committees. The committee for temperature and humidity quantities set the focus on good practice for calibrations according to its guidelines DKD-R 5-1 for resistance thermometers (e.g. Pt100) and DKD-R 5-8 for hygrometers for the direct measurement of relative humidity, first. Here, for several specific expressions, e.g. the used temperature scales (e.g. ITS-90 vs. thermodynamic temperature), the impact of hysteresis and self-heating or the calibration medium used, related XML code implementations are defined and tested. Another important aspect to achieve machine-interpretability of information in a DCC are refType definitions. RefTypes are key semantic providing attributes that are used in the XML code if no unique structure is available in the DCC scheme for a particular information that should still be associated with a specific meaning. Hence, they represent “bookmarks” for the algorithms interpreting good practice DCCs and therefore it is vital that they have a fixed wording. For the case of temperature and humidity calibrations, several refType denotations together with their meanings and allowed locations in the DCC-schema were defined, respectively. These refType definitions will be available in an online refType repository that is hosted by the DKD and can be incorporated into good practice DCCs for validation. The good practice definitions for temperature and humidity DCCs introduced in this contribution will be thoroughly described and published in an open access DKD expert report that is also equipped with validated DCC templates for most common calibration items and procedures. Since most of the added values of an automated metrological traceability are provided on the receiving side of DCCs, specific use cases are currently acquired for temperature and humidity calibrations, respectively. These pilot applications are especially intended to demonstrate the potential of DCC utilization for the industrial metrology and quality management. T2 - IMEKO 2024 XXIV World Congress CY - Hamburg, Germany DA - 26.08.2024 KW - Digital Calibration Certificate KW - QI-digital KW - Digital Metrology KW - Calibration KW - Temperature quantities PY - 2024 UR - https://www.imeko2024.org/home AN - OPUS4-61870 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Melzer, Michael T1 - The temperature DCC exposed N2 - The DAkkS-accredited calibration laboratory of the German Federal Institute for Materials Research and Testing (BAM) has established valid XML digital calibration certificates (DCCs) for calibrations of resistance thermometers within the scope of its accreditation. Hence, all necessary information according to ISO/IEC 17025 and the DKD-R 5-1 calibration rule is provided in a machine-readable and machine-interpretable form. Furthermore, we actively participate in the definition of general and community-specific good practice requirements for the DCC of temperature quantities as technical specifications, hosted by the German Calibration Service (DKD). In this contribution the entire XML source code of a DCC from a Pt 100 thermometer calibration will be exposed and discussed. The DCC was automatically generated using a self-implemented middleware that is compiling the metadata (i.e. customer-, order-, item- and method data) and combines it with the measured calibration data and influence conditions into a process- and lab-specific DCC template. Since it was issued as an accredited calibration certificate, the validated and authorized DCC is also equipped with the novel digital accreditation symbol to form an `eAttestation´. This advanced electronic seal with a qualified certificate was recently piloted with the German national accreditation body (DAkkS), and, after successful validation by the receiver, verifies the active accreditation status of the issuing body at the time of sealing (authorization). As it also provides all other functionalities of an electronic seal, (i.e. data integrity and authenticity), it can fully replace a digital signature on accredited DCCs. The presented temperature DCC architecture fully complies to the latest good practice definitions of the DKD and thus represents a level 4 DCC according to the utility model for machine interpretability of DCCs. This also includes basic and quantity-specific refType definitions that are linked to an online refType repository to harmonize these key semantic providing elements across other DCC-issuing laboratories. The paper and also its conference poster will not represent a general introduction and motivation for the DCC itself. It rather addresses more detailed aspects of good practice, especially for DCCs from temperature quantity calibrations and may stimulate in-depth discussions between DCC experts from the providing, utilizing and accrediting points of view. The work was performed within the national QI-Digital initiative of the German Federal Ministry for Economic Affairs and Climate Action. T2 - IMEKO 2024 XXIV World Congress CY - Hamburg, Germany DA - 26.08.2024 KW - Digital Calibration Certificate KW - E-Attestation KW - QI-Digital KW - Digital Metrology KW - Calibration PY - 2024 UR - https://www.imeko2024.org/home AN - OPUS4-61872 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Melzer, Michael T1 - Accredited Digital Calibration Certificates (DCCs): Automated Generation and Utilization for Thermal Process Monitoring T1 - Der digitale Kalibrierschien (DCC) mit Akkreditierung: Metrologische Rückführung und Qualitätssicherung auf Knopfdruck N2 - The accredited calibration laboratory of the German Federal Institute for Materials Research and Testing (BAM) has established validated XML digital calibration certificates for calibrations of resistance thermometers (e.g. Pt100) within the scope of its accreditation. Hence, all necessary information according to ISO/IEC 17025 and the DKD-R 5-1 calibration rule is provided in a machine-readable and machine-interpretable form. For the automated DCC generation, a self-implemented middleware is compiling the calibration- and metadata into a process- and lab-specific DCC template. All generated DCCs can be readily validated against the approved DCC schema (v.3.2.1). Furthermore, the authorized DCCs are equipped with the novel digital accreditation symbol, that was recently piloted with the German national accreditation body (DAkkS). In order to demonstrate the added value of DCCs particularly on the receiver side, a DCC demonstrator was developed for the use case of thermal process monitoring, which is also exhibited at the “innovative calibration” area. The software automatically processes incoming DCCs, to provide metrological traceability and a quality-assured process conformity assessment, practically at the push of a button. T2 - SENSOR+TEST 2024 Technology Forum "Innovative Calibration" CY - Nuremberg, Germany DA - 11.06.2024 KW - Digital Calibration Certificate KW - QI-digital KW - Digital Metrology KW - Calibration PY - 2024 UR - https://www.sensor-test.de/de/besucher/sensor-test-2024-digital/ AN - OPUS4-61875 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Melzer, Michael T1 - Werkzeugkasten für die digitale Transformation der QI: eAttestation N2 - Für den internationalen Handel mit Waren und Dienstleistungen ist es entscheidend, dass sich Qualitätsaussagen schnell und verlässlich überprüfen lassen. Gleichzeitig müssen digitale Ergebnisberichte immer häufiger maschinenlesbar sein und vertrauensvoll in Anwendungen und Prozesse der Industrie 4.0 eingebunden werden. Aus diesen Gründen hat die DAkkS ein digitales Akkreditierungssymbol (d-AS) entwickelt. Dieser Impulsvortrag zeigt kurz die Entwicklung des d-AS von der analogen Form bis zur automatisierten digitalen Verifizierung und stellt seine Anwendung und Funktionalitäten auf einer eAttestation vor. T2 - QI-Digital Forum 2024 CY - Berlin, Germany DA - 09.10.2024 KW - eAttestation KW - Digital certificates KW - QI-Digital KW - Quality Infrastructure KW - Automation PY - 2024 UR - https://www.qi-digital.de/termine-und-veranstaltungen/meldung/rueckblick-auf-das-qi-digital-forum-2024-pressemitteilung AN - OPUS4-61897 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - VIDEO A1 - Melzer, Michael T1 - Der DCC-Demonstrator erklärt N2 - In diesem Video erklärt Dr. Michael Melzer (Leiter des BAM-Kalibrierlabors) die notwendigen Entwicklungsschritte hin zu einer Praxistauglichkeit des DCCs und wie die „Metrologische Rückführung auf Knopfdruck“ funktioniert. Der digitale Kalibrierschein macht den Kalibrierprozess effizienter, sicherer und digital nachverfolgbar. Anhand eines Demonstrators zeigt er die Vorteile der metrologischen Digitalisierung und Automatisierung in der Anwendung – von der Reduzierung von Fehlerquellen bis hin zum wirtschaftlichen Nutzen im industriellen Messwesen. KW - Digital calibration certificate KW - QI-digital KW - Digital metrology KW - Calibration KW - Automation PY - 2024 UR - https://www.youtube.com/watch?v=0lfYypvTl9E&t=8s PB - YouTube, LLC CY - San Bruno, CA, USA AN - OPUS4-62076 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Melzer, Michael T1 - Good Practice für DCCs von Temperatur- und Feuchtemessgrössen N2 - Der digitale Kalibrierschein (DCC) enthält alle Informationen eines herkömmlichen Kalibrierscheins in maschinenlesbarer und möglichst auch -interpretierbarer Form, um eine Automatisierung des Qualitätsmanagements und der metrologischen Rückführbarkeit in den Laboren und im industriellen Messwesen zu ermöglichen. Neben den allgemeinen Anforderungen, z.B. aus ISO/IEC 17025, gibt es messgrößen- und kalibrierverfahrensspezifische Anforderungen, die auch in digitalen Ergebnisberichten erfüllt sein müssen. Innerhalb des DKD Fachausschusses für Temperatur und Feuchte werden derzeit good practice Empfehlungen erarbeitet, um zu definieren, wie genau diese Anforderungen im Rahmen des DCC erfüllt werden sollten. Anhand der Temperaturskala des Kalibriermediums und der Angabe der Hysterese werden drei dieser good practices hier beispielhaft erläutert. T2 - TEMPERATUR 2024 CY - Berlin, Germany DA - 05.06.2024 KW - Digital Calibration Certificate KW - Digital certificates KW - QI-Digital KW - Digital Metrology KW - Calibration PY - 2024 UR - https://www.temperatur.ptb.de/startseite AN - OPUS4-61891 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Nicolicea, Alberto A1 - Oliveros-Mata, E. S. A1 - Zabila, Y. A1 - Makarov, D. A1 - Melzer, Michael A1 - Pelkner, Matthias T1 - Flexible anisotropic magnetoresistive sensors for novel magnetic flux leakage testing capabilities N2 - Rigid magnetic field sensors such as anisot Hall sensors have been used for years and have become industry standard for electromagnetic non-destructive testing (NDT). Recent technological developments in the field of flexible electronics allow for the fabrication of reshapeable magnetic field sensors on flexible substrates via thin-film deposition or printing. The magnetic properties of these sensors have comparable characteristics to industry-standard rigid magnetic field sensors, with the added ability of adapting to the surface of complex components and scanning in contact with the sample surface. This improves defect detectability and magnetic signal strength by minimizing the scanning lift-off (LO) distance. In this article flexible AMR sensors mounted on a rotative mechanical holder were used to scan a semi-circular ferromagnetic sample with 3 reference defects via magnetic flux leakage (MFL) testing, thus demonstrating the applicability of this type of sensors for the scanning of curved samples. In order to benchmark the performance of these sensors in comparison to industry standard rigid magnetic field sensors, a ferromagnetic sample with 10 reference defects of different depths was scanned employing flexible AMR and rigid GMR sensors. Defects with depths ranging from 110 μm up to 2240 μm were detected with an signal-tonoise ratio (SNR) of 2.7 up to 27.9 (for flexible AMR sensors) and 6.2 up to 72.3 (for rigid GMR sensors), respectively. A 2D magnetometer mapping of the sample with a spatial scanning step of 10 × 50 μm2 (flexible AMR) and 16 × 100 μm2 (rigid GMR) was obtained. The results show that this type of sensor can be used for high-resolution and high-detail mapping of defects on the surface of planar and non-planar ferromagnetic samples since the scanning lift-off distance is equal to the substrate thickness of 20 μm for in-contact scanning. The SNR comparison between flexible and rigid sensors shows that the performance of the flexible AMR sensors employed is not very far behind the performance of the rigid GMR sensors used. KW - Flexible magnetic field sensors KW - Non-destructive testing KW - Magnetic flux leakage KW - Thin film sensor fabrication KW - Defect detection PY - 2024 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-603931 DO - https://doi.org/10.1016/j.ndteint.2024.103160 SN - 0963-8695 VL - 146 SP - 1 EP - 15 PB - Elsevier CY - Amsterdam AN - OPUS4-60393 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Melzer, Michael T1 - The temperature DCC exposed N2 - The DAkkS-accredited calibration laboratory of the German Federal Institute for Materials Research and Testing (BAM) has established valid XML digital calibration certificates (DCCs) for calibrations of resistance thermometers within the scope of its accreditation. Hence, all necessary information according to ISO/IEC 17025 and the DKD-R 5-1 calibration rule is provided in a machine-readable and machine-interpretable form. Furthermore, we actively participate in the definition of general and community-specific good practice requirements for the DCC of temperature quantities as technical specifications, hosted by the German Calibration Service (DKD). In this contribution the entire XML source code of a DCC from a Pt 100 thermometer calibration will be exposed and discussed. The DCC was automatically generated using a self-implemented middleware that is compiling the metadata (i.e. customer-, order-, item- and method data) and combines it with the measured calibration data and influence conditions into a process- and lab-specific DCC template. Since it was issued as an accredited calibration certificate, the validated and authorized DCC is also equipped with the novel digital accreditation symbol to form an `eAttestation´. This advanced electronic seal with a qualified certificate was recently piloted with the German national accreditation body (DAkkS), and, after successful validation by the receiver, verifies the active accreditation status of the issuing body at the time of sealing (authorization). As it also provides all other functionalities of an electronic seal, (i.e. data integrity and authenticity), it can fully replace a digital signature on accredited DCCs. The presented temperature DCC architecture fully complies to the latest good practice definitions of the DKD and thus represents a level 4 DCC according to the utility model for machine interpretability of DCCs. This also includes basic and quantity-specific refType definitions that are linked to an online refType repository to harmonize these key semantic providing elements across other DCC-issuing laboratories. The work was performed within the national QI-Digital initiative of the German Federal Ministry for Economic Affairs and Climate Action. T2 - Deutsche Marktüberwachungskonferenz 2025 CY - Berlin, Germany DA - 17.09.2025 KW - Calibration KW - Digital Calibration Certificate KW - E-Attestation KW - Digital Metrology KW - QI-Digital PY - 2024 AN - OPUS4-64147 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Melzer, Michael T1 - The temperature DCC exposed N2 - The DAkkS-accredited calibration laboratory of the German Federal Institute for Materials Research and Testing (BAM) has established valid XML digital calibration certificates (DCCs) for calibrations of resistance thermometers within the scope of its accreditation. Hence, all necessary information according to ISO/IEC 17025 and the DKD-R 5-1 calibration rule is provided in a machine-readable and machine-interpretable form. Furthermore, we actively participate in the definition of general and community-specific good practice requirements for the DCC of temperature quantities as technical specifications, hosted by the German Calibration Service (DKD). In this contribution the entire XML source code of a DCC from a Pt 100 thermometer calibration will be exposed and discussed. The DCC was automatically generated using a self-implemented middleware that is compiling the metadata (i.e. customer-, order-, item- and method data) and combines it with the measured calibration data and influence conditions into a process- and lab-specific DCC template. Since it was issued as an accredited calibration certificate, the validated and authorized DCC is also equipped with the novel digital accreditation symbol to form an `eAttestation´. This advanced electronic seal with a qualified certificate was recently piloted with the German national accreditation body (DAkkS), and, after successful validation by the receiver, verifies the active accreditation status of the issuing body at the time of sealing (authorization). As it also provides all other functionalities of an electronic seal, (i.e. data integrity and authenticity), it can fully replace a digital signature on accredited DCCs. The presented temperature DCC architecture fully complies to the latest good practice definitions of the DKD and thus represents a level 4 DCC according to the utility model for machine interpretability of DCCs. This also includes basic and quantity-specific refType definitions that are linked to an online refType repository to harmonize these key semantic providing elements across other DCC-issuing laboratories. The paper and also its conference poster will not represent a general introduction and motivation for the DCC itself. It rather addresses more detailed aspects of good practice, especially for DCCs from temperature quantity calibrations and may stimulate in-depth discussions between DCC experts from the providing, utilizing and accrediting points of view. The work was performed within the national QI-Digital initiative of the German Federal Ministry for Economic Affairs and Climate Action, T2 - Global Industrie CY - Lyon, France DA - 11.03.2025 KW - Calibration KW - Digital Calibration Certificate KW - E-Attestation KW - Digital Metrology KW - QI-Digital PY - 2024 AN - OPUS4-64177 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Melzer, Michael T1 - The Digital RM Certificate Derived from the DCC N2 - The digital calibration certificate (DCC), is based on an XML-schema, which defines its general data structure and terminology. This DCC-schema is maintained and hosted by the PTB. In oder to also provide reference material certificates in machine-readable formats, allowing its automated processing and administration, the DCC-Schema is adapted to meet the specific requirements of reference material documents. This video presentation highlights the differences and similarities of both quality documents in terms of digitalization and introduces a first attempt to a DRMC-schema. T2 - CCQM Online Workshop on Digital and FAIR Chemical and Biological Reference Data and Certificates: Challenges and Opportunities CY - Online meeting DA - 09.09.2024 KW - Reference materials KW - Digital certificates KW - QI-Digital KW - Digital reference material document KW - Digital Metrology PY - 2024 AN - OPUS4-61888 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Melzer, Michael A1 - Nattuveettil, Keerthana T1 - Automated generation and utilization of accredited temperature DCCs N2 - The accredited calibration laboratory of the German Federal Institute for Materials Research and Testing (BAM) has established verified XML digital calibration certificates for calibrations of resistance thermometers within the scope of its accreditation. Hence, all necessary information according to ISO/IEC 17025 and the DKD-R 5-1 calibration rule is provided in a machine-readable and machine-interpretable form. For the automated DCC generation, a self-implemented middleware is compiling the metadata (i.e. customer-, order-, item- and method data) and combines it with the measured calibration data and influence conditions into a process- and lab-specific DCC template. This DCC software is able to handle both, single probe calibrations (e.g. Pt 100) as well as measurement chains (e.g. thermometers and temperature loggers) and also supports multiple item calibrations with the automated creation of individual DCC files. All generated DCCs can be readily validated against the DCC scheme (v.3.2.1). The validated and authorized DCCs are equipped with the novel digital accreditation symbol, that was recently piloted with the German national accreditation body (DAkkS), to form `eAttestations´. This advanced electronic seal with a qualified certificate, after successful validation by the receiver, provides three basic functionalities in a DCC: 1. Authenticity: It confirms that the issued certificate actually originates from the BAM calibration laboratory (D-K-11075-08) 2. Integrity: It protects all the data and information in the DCC from change and manipulation 3. Accreditation: It verifies the active accreditation status of the issuing body at the time of sealing (authorization) Thus, this accreditation seal can fully replace an electronic signature on an accredited DCC. In order to demonstrate the added value of DCCs also on the receiver side, the BAM DCC-team started to develop a simple but capable DCC demonstrator. For the use case of thermal process monitoring, the software reads out the metrological data of an incoming DCC, performs a linear regression of the temperature calibration values, uses the obtained calibration function to correct the raw sensor readings, extends the DCC measurement uncertainty values with further contributions (e.g. from the correction and the hysteresis) and adjusts the process-defined acceptance limits to account for the measurement uncertainty, all in real-time. Hence, it automatically utilizes a DCC to obtain metrological traceability and a quality-assured process conformity assessment, practically at the push of a button. In the talk, the automated DCC generation in the scope of our accreditation, including the electronic sealing with the digital accreditation symbol, as well as the one-click DCC utilization with our demonstrator will be presented. The work was performed within the national QI-Digital initiative. T2 - 4th International DCC Conference CY - Online meeting DA - 27.02.2024 KW - Digital Calibration Certificate KW - DCC KW - E-Attestation KW - Calibration KW - Digital Metrology PY - 2024 UR - https://www.dcc-conference-2024.ptb.de/home N1 - Video file from minute 28 on AN - OPUS4-61867 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -