Mass and standard weights
Preparing class and nominal values for standard-weight calibration
Standard weights are sensitive to contamination, impact and environmental conditions. Complete class, nominal-value, quantity and use information supports the correct method and scope review.
Information required before calibration
List every nominal value and quantity, the documented or intended class, set identification, manufacturer and the organization's acceptance criteria.
- Nominal value and quantity
- Class such as E2, F1, F2 or M1
- Set identification and case condition
- Use and acceptance criteria
Handling and transport
Avoid bare-hand contact, use a clean dry case, isolate corroded or damaged pieces and agree any cleaning or adjustment before work.
- Use suitable gloves or forceps
- Prevent movement and impact in transit
- Do not polish or add material without agreement
- Retain prior certificates for trend review
FAQ
Does every weight need a unique identity?
A traceable identity is recommended, especially when a set contains repeated nominal values, so certificates and historical results cannot be mixed.
Is the class printed on the case enough to confirm scope?
No. Prior documents, physical condition, intended criteria and the laboratory's current scope should be reviewed before service is represented or quoted.