Calibration & Service FAQs

Calibration & Metrological Traceability

Rhopoint Instruments operates a central ISO/IEC 17025‑accredited gloss laboratory in the United Kingdom, UKAS laboratory number 32245, with regional calibration services in Germany and the United States.

During recalibration at a regional location, gloss instruments are adjusted to Rhopoint manufacturer traceable standards, and the reference standard is replaced with a new standard certified by the UK laboratory in accordance with ISO/IEC 17025.

This combination ensures metrological traceability to the accredited UK laboratory while maintaining manufacturer‑controlled calibration through local service.

The UK laboratory is accredited to ISO/IEC 17025 by UKAS for gloss calibration and the certification of high‑gloss reference tiles.

Neither Rhopoint Instruments GmbH nor Rhopoint Americas is itself ISO/IEC 17025‑accredited; regional calibration services are traceable to, but not performed within, the accredited laboratory.

Certificate dates and traceability

Calibration tiles used by Rhopoint Instruments Germany or Rhopoint Americas Inc are calibrated in our UKAS‑accredited ISO/IEC 17025 gloss laboratory in the UK – each tile is supplied with its own calibration certificate showing the actual calibration date in that laboratory.

We cannot alter or back‑date these UKAS calibration certificates; the date on each tile certificate always reflects when the tile was calibrated in the UK lab.

During service in Germany or USA, the instrument’s original reference tile is replaced by a new tile calibrated in the UK laboratory, and the device is adjusted and verified against this tile using ISO/IEC 17025‑traceable service equipment.

This process provides a documented traceability chain from the instrument readings to standards calibrated in the accredited laboratory.

Because the tile calibration date and the device service date are different, customers typically use the issue date of the device calibration report from Germany or the USA as the start of their chosen validity period or maintenance interval.