Non-automatic weighing scales
A non-automatic weighing instrument is a measuring instrument for determining a weight that requires the intervention of an operator. This means that non-automatic scales cannot be integrated into fully automated processes. Weiterlesen
Can a non-automatic scale be calibrated?
Yes, according to the calibration regulations, the scale can be calibrated by a scale builder or scale manufacturer, who is authorized to calibrate scales.
Here you will find all information about certified scales
Accuracy of non-automatic scales
Certified scales are classified into accuracy classes. This is the qualitative designation for the extent of the approximation of the displayed value to the true value. For non-calibratable scales, repeatability (a measure for precision) and linearity (a measure for accuracy) are usually provided to quantify accuracy.
Accuracy Class
The following accuracy classes have been defined for calibratable scales
(see Directive 2014/31/EU Annex I No. 2):
- Accuracy Class I: Fine scale
- Accuracy Class II: Precision scale
- Accuracy Class III: Commercial scale
- Accuracy Class IIII: Industrial scale
Definition of classes and values:
| Accuracy Class | Calibration Value "e" | Number of Calibration Values | Minimum Load | |
|---|---|---|---|---|
| Min | Max | |||
| Fine scale I | 0.001 g ≤ e | 50,000 | - | 100 e |
| Precision scale II | 0.001 g ≤ e ≤ 0.05 g 0.1 g ≤ e |
100 5,000 |
100,000 100,000 |
20 e 50 e |
| Commercial scale III | 0.1 g ≤ e ≤ 2 g 5 g ≤ e |
100 500 |
10,000 10,000 |
20 e 20 e |
| Industrial scales IIII | 5 g ≤ e | 100 | 1,000 | 10 e |
*For scales of classes I and II, in the Minimum Load column, the calibration value "e" is replaced by the division value "d" ("Scale with auxiliary display device").
Industrial scales are only permitted for some specific uses. Usually, at least one scale of class III (commercial scale) must be used. When selecting an appropriate certified scale, always consider the minimum load and the error limits.