Calibrated measuring equipment requires calibrated test equipment
For your balance to display correct values, it must be calibrated regularly with a returned test weight (normal). This is also required by the DIN EN ISO 9001ff standard.
We therefore recommend that you order the appropriate standard including DAkkS calibration certificate for your balance.
The appropriate standard will be suggested to you when you purchase the balance, depending on the desired accuracy level.
Quality of the test weight
A balance can never be more accurate than the test weights used to adjust it, it all depends on its tolerance.
Accuracy of the test weight
Should correspond to the readout [d] of the balance, or rather be better.
Nominal weight value
This is shown in adjust mode "CAL" in the balance display. Given a choice, the heaviest weight is the most suitable for accurate measurement. The weight value should be more than 80% of the maximum weighing range of the balance. Once accuracy and nominal weight value are specified, the suitable test weight is selected according to the tolerances of the accuracy classes E1 - M3.
Example:
This is shown in adjust mode "CAL" in the balance display. Given a choice, the heaviest weight is the most suitable for accurate measurement. The weight value should be more than 80% of the maximum weighing range of the balance. Once accuracy and nominal weight value are specified, the suitable test weight is selected according to the tolerances of the accuracy classes E1 . M3.
Example:
Balance with weighing range [Max] 2000 g (2 kg) and readout [d] 0,01 g (10 mg)
- The accuracy of the required test weight is determined by readout[d] with approx. ±10 mg.
- Displayed weight size on „CAL“: 1000 g or 2000 g. The required test weight has a 2 kg weight size.
- Suitable test weight with ±10 mg tolerance and 2 kg weight size can be found in accuracy class F1.
E1 test weights are recommended. Depending on the safety requirements, E2 test weights with a DAkkS calibration certificate will also be sufficient.