A micrometer generally provides greater precision than a vernier caliper, but can measure a smaller range of lengths.
Before using a micrometer:
- Make sure the work piece being measured is clean and has no burrs on the edges.
- The temperature of the work piece is required to be around 20°C to have consistent measuring results.
- Precision measuring tools should never be put near a magnetic area to avoid the micrometer being magnetized.