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How often should the sensitivity of a balance or scale be checked?

A daily test is the standard for analytical balances and it is generally required for legally verified (stamp approved) Accuracy Class I and II balances and scales.

Depending on the resolution and accuracy requirements, we recommend daily to monthly sensitivity tests.

Testing the sensitivity at the beginning of a workday (with the balance warmed-up or left in a standby state overnight) is common, however, it makes more sense to do this immediately before starting an important series of measurements - to meet especially high requirements, the sensitivity should also be tested immediately after such a series.

Because the sensitivity considerably depends on the ambient conditions, particularly on the temperature, it should be checked when high fluctuations in the temperature or barometric pressure occur.

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GAVTT Precision Balances Limited

Service and Repair of High Precision Mechanical and Electronic Weighing Balances and Scales in Canada.

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