Please note that this is not a call for tenders but a publication announcing the Contracting authority’s intention to publish a future negotiated low or middle valueprocedure. Compliance with the JRC ISO 9001 certification obliges technical services to ensure that measurement assets perform to specification over time. This goal is achieved by periodic calibration exercises, during which an instrument is compared to physical standards, and correction factors derived. This procurement aims to establish a multiannual framework contract with a provider of on-site calibration services. Contract deliverables shall be certified calibration reports complying with ISO 9001. Calibration activities shall be conducted on-site to avoid exposing JRC assets to transport risks.