In all scales there is a so-called eccentricity error.
Performing an eccentricity test is an important part of ensuring the accuracy of your weighing scale. It helps to identify any errors that may occur due to an uneven distribution of weight on the scale’s platform. Here’s how you can perform an eccentricity test yourself:
The eccentricity error is checked by placing a mass of 1/3 of the maximum capacity of the scale on each load cell, i.e. on each of the four corners in succession.
The difference between each indication and the nominal value of the test mass must not exceed ±1 step or scale division.
On a Max 600 kg / e= 0.2kg scale, the eccentricity test is performed with 200 kg. The error must not be greater than ±0.2 kg.
This means that such a result, for example, would be acceptable:
For scales with a single load cell, the load should be placed centrally, but eccentricity testing is nevertheless mandatory for scales verified for use in legal metrology.
If the above error is exceeded, this indicates a fault / damage of at least one load cell.
