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ISO 8655 is the official standard for piston-operated volumetric apparatuses, which includes pipettes, burettes, dilutors, dispensers, and manually operated precision laboratory syringes. An updated version of the standard came into force in May 2022 and included the following significant changes for pipettes:
The changes impact pipette calibration service providers, in-house calibration laboratories, and pipette users. However, the revisions are designed to ensure that pipette users benefit from improved reliability and accuracy because their pipettes are calibrated and tested in a safer and more reliable way.
With a focus on pipettes, this guide provides valuable information on the revisions in a clear and easily digestible format and explains what you need to do to ensure compliance with the revised standard, covering:
- Metrological terminology
- Maximum permissible errors for pipettes
- Calibration and routine testing
- Calibration of pipettes using a balance—the gravimetric reference method
