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Hydrometers, digital density meters and thermometers are verified every 6 months — against a certified master instrument, or by cross-verification between 3 instruments on the same sample. An instrument without a valid record may not be placed in service.
Acceptance limits in use: ±0.5 kg/m³ · ±0.5 °C · reminder 30 days before due
No hydrometers, density meters or thermometers in the register yet. Add them as objects on a site and their calibration schedule starts automatically.