Round-robin test

for particulate measuring systems according to VDA 19 Teil 1

What is a round-robin test?

A round-robin test is a method of external quality assurance for measuring systems. Identical comparison samples are examined with the same processes on different measuring systems. The comparison of the results allows conclusions to be drawn about the measurement quality of the measurement systems involved.

Why a round-robin test?

In-house laboratories are recommended to have their measuring systems checked regularly as part of their quality management system and to include this in their quality management manual in accordance with DIN EN ISO 9001.

It is mandatory for accredited test laboratories to regularly participate in round-robin tests as part of the state approval process. Annual participation is even recommended as part of the DIN EN ISO / IEC 17025 standard. This is to ensure the quality of their results and prove their competence.

How much does it cost to participate?

The fee for a measuring system that wants to take part in the laboratory interlaboratory comparison is 550 euros plus VAT, for CEC members 300 euros plus VAT. Other participating measuring systems receive a discount. Please contact us in this regard. In addition, we charge a one-time travel fee of 0.30 euros / km for the return journey between the CEC Leonberg and the participant’s address in order to bring the comparative sample to you for analysis.

When is the round robin test carried out?

The CEC is currently offering one round robin test per year. A round-robin test starts as soon as the minimum number of measuring systems has been reported, but at the earliest at the beginning of the specified implementation period. It is therefore important to register in good time.

Registration and documents

The next proficiency test will start in May 2021.



How does the round-robin test work?

  1. A laboratory registers its various measuring systems *, regardless of the manufacturer, for the laboratory interlaboratory comparison.
  2. A test filter is made available to the laboratory as part of the laboratory round-robin test, which is checked for each registered measuring system according to the standard analysis of VDA 19 Part 1.
  3. The existing data of all participants is evaluated confidentially by the independent provider Cleaning Excellence Center.
  4. Each participant receives an anonymized results report for each registered measurement system, in which his own results are compared with those of the others and evaluated using the z-score according to DIN 38402-A45.
  5. In this way, the participant is enabled to identify and eliminate potential weak points.
  6. Every successfully participating measuring system receives a CEC badge, which makes it immediately clear to the auditors when the last interlaboratory test was carried out on this measuring system.
  • In the laboratory interlaboratory comparison of the Cleaning Excellence Center, a measuring system is defined as a light-optical measuring instrument and the person who carries out the manual follow-up control. Stereo microscopy systems, zoom microscopy systems, materials microscopy systems and flatbed scanners are permitted for the laboratory round robin test.

The measuring instrument must meet the requirements for the complete implementation of the standard analysis of VDA 19 Part 1. This ensures that the laboratory ring tests are carried out independently of the manufacturer and in accordance with VDA 19 Part 1.

Previous participants:

  • Albert Handtmann Metallgusswerk GmbH & Co. KG
  • Analytik Aurachtal GmbH
  • Arnold Umformtechnik GmbH & Co. KG
  • Benseler Entgratungen GmbH & Co. KG
  • Brose Fahrzeugteile GmbH & Co. KG
  • Bystronic Laser AG
  • CasoCleanCheck GbR
  • CleanControlling GmbH
  • Conti Temic microelectronic GmbH
  • Continental Teves AG & Co. oHG
  • Daimler AG
  • DHD Clean Parts GmbH & Co. KG
  • dhs Dietermann & Heuser Solution GmbH
  • Dr. O.K. Wack Chemie GmbH
  • Ebm-papst St. Georgen GmbH & Co. KG
  • EVS Technology GmbH
  • Gläser GmbH
  • Hochschule Heilbronn
  • Hoeckle GmbH
  • Hydac FluidCareCenter GmbH
  • Intercable GmbH
  • Jomesa Messsysteme GmbH
  • LPW Reinigungssysteme GmH
  • Mebis LfTS GmbH
  • Modine Europe GmbH
  • Olympus Soft Imaging Solutions GmbH
  • Probamus Werkstofflabor GmbH
  • QTS GmbH
  • Quality Analysis GmbH
  • realclean GmbH
  • RIO GmbH
  • RMS-Foundation
  • Schaeffler Technologies AG & Co. KG
  • Schuk GmbH
  • Sefar AG
  • Strabag Proberty and Facility Services GmbH
  • Sumida Components & Modules GmbH
  • TE Connectivity Germany GmbH
  • TecClean GmbH
  • Thyssenkrupp Presta Mülheim GmbH
  • TRUMPF Laser GmbH
  • TU Dortmund, Institut für Produktionssysteme
  • VIA Oberflächentechnik GmbH
  • vohtec Qualitätssicherung GmbH
  • ZF Friedrichshafen AG

Press releases

Compare particular measuring systems with one another

Pressemitteilung in der MED engineering (Ausgabe 04/2018)

Labor-Ringversuch von unabhängigem Anbieter liefert zuverlässige Daten über Messqualität. 

Da bereits mikroskopisch kleine Partikel die Funktion von empfindlichen und sicherheitsrelevanten Bauteilen beeinträchtigen können, spielt die technische Sauberkeit in Branchen wie der Medizintechnik oder dem Maschinenbau eine immer bedeutendere Rolle […]

 vollständige Pressemitteilung herunterladen (PDF) >>

A plus for quality and safety

Pressemitteilung vom 16.06.2016

Das Cleaning Excellence Center (CEC) Leonberg bietet seit kurzem einen unabhängigen Labor-Ringversuch für partikuläre Messsysteme nach VDA 19 Teil 1 für betriebseigene und akkreditierte Prüflabore an. […]

vollständige Pressemitteilung herunterladen (PDF) >>

Laboratory circle test for particulate measuring systems in practice

Pressemitteilung in der WOTech (Ausgabe 10/2017)Die Prüfung der Sauberkeit nach VDA 19 stellt für zahlreiche Bauteile ein wichtiges Verfahren der Prozesskette zur Herstellung von Produkten dar. Für den Beleg der Prozesssicherheit des Verfahrens werden regelmäßig Ringversuche der eingesetzten Messsysteme bei Prüf- und Betriebslaboratorien durchgeführt. Von den 23 geprüften Messsystemen […] vollständige Pressemitteilung herunterladen (PDF) >>

Comparative test for particulate measuring systems

Pressemitteilung im Journal für Oberflächentechnik (JOT) Spezial: Industrielle Teilereinigung (Ausgabe 14/2017)Die zweimal jährlich vom Cleaning Excellence Center durchgeführten Labor-Ringversuche für partikuläre Messsysteme nach VDA 19.1 [1] ermöglichen Laboratorien, ihre Messergebnisse durch einen unabhängigen Anbieter und anonymisiert miteinander zu vergleichen und eine qualitative Aussage über die eigene Messqualität zu erhalten. […]vollständige Pressemitteilung herunterladen (PDF) >>

We create platforms for sharing experiences

TecSa TALK series on current topics from technical cleanliness

Topic guests from the technical cleanliness sector are invited in the form of a discussion round. Led by a moderator through the exchange, the interlocutors describe their experiences and share their expertise. Following the conversation, the listening participants can take action themselves and ask their questions to the guests.

The series of events takes place regularly on the third Tuesday of the month as an online format on different topics from technical cleanliness and is accessible to anyone interested as a listening participant.

You can find more information about the TecSa-TALK and the upcoming dates here. hier.

We arrange contacts

Mediation of contacts for tasks in the context of technical cleanliness

Talk to the CEC office. We provide you with helpful contacts on the subject of technical cleanliness.

It doesn’t matter whether you are a member of the CEC or not.

Scroll to top