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A balance normally has two types of calibration modes, internal and external. The internal calibration is performed with internal weights or an electrical compensation to mimic the calibration weight. Performing the internal calibration procedures are an important part of the preventative maintenance program for your scale or balance. It is also important to note that internal calibrations should be verified prior to use.
The external calibration requires a calibrated weight to be placed on the balance when prompted. Certified external weights provide traceability to the International System of Units (SI). The instructions for calibration and the size of the weight required is in the user manual for the balance.
What Is The Accuracy Of My Balance?
Accuracy is the closeness of the measured value to the actual value. The balance will indicate the measured value of a weight based on the accuracy of the weight used to calibrate the balance. The balance can only be as accurate as the calibration weight. Accuracy is normally associated with the tolerance of the weight used to calibrate the balance.
High precision weights E2
Adjustment, test, verification and calibration weights for class I precision balances.
For quality assurance of scales with a number of steps < 1.000.000. For weighing or comparison measurements on scales of class l or on mass comparators. For calibration and verification of weights of classes F1 and F2 according to OIML R111.
| Class | Specification | Milogram weight | Gram weight | kilogram | |||||
| E1 | 1mg-20kg | 1mg 2mg 2mg* 5mg 10mg 20mg 20mg* 50mg 100mg 200mg 200mg* 500mg | 1g 2g 2g* 5g 10g 20g 20g* 50g 100g 200g 200g* 500g | 1kg 2kg 2kg* 5kg 10kg 20kg | |||||
| E2 | 1mg-50kg | 1mg 2mg 2mg* 5mg 10mg 20mg 20mg* 50mg 100mg 200mg 200mg* 500mg | 1g 2g 2g* 5g 10g 20g 20g* 50g 100g 200g 200g* 500g | 1kg 2kg 2kg* 5kg 10kg 20kg | |||||
| F1 | 1mg-1000kg | 1mg 2mg 2mg* 5mg 10mg 20mg 20mg* 50mg 100mg 200mg 200mg* 500mg | 1g 2g 2g* 5g 10g 20g 20g* 50g 100g 200g 200g* 500g | 1kg 2kg 2kg* 5kg 10kg 20kg----1000kg | |||||
| F2 | 1mg-1000kg | 1mg 2mg 2mg* 5mg 10mg 20mg 20mg* 50mg 100mg 200mg 200mg* 500mg | 1g 2g 2g* 5g 10g 20g 20g* 50g 100g 200g 200g* 500g | 1kg 2kg 2kg* 5kg 10kg 20kg----1000kg | |||||
| M1 | 1mg-1000kg | 1mg 2mg 2mg* 5mg 10mg 20mg 20mg* 50mg 100mg 200mg 200mg* 500mg | 1g 2g 2g* 5g 10g 20g 20g* 50g 100g 200g 200g* 500g | 1kg 2kg 2kg* 5kg 10kg 20kg----1000kg | |||||
| M2 |
0.5kg-10tons 0.5kg-10tons |
500g 500g |
1kg 2kg 2kg* 5kg 10kg 20kg 25kg 50kg 100kg 200kg 250kg 500kg 1000kg 2000kg 5000kg 10tons | ||||||
In accordance with OIML R111-1:2004, weights are not marked with their nominal value or with information on the unit. For differentiation purposes, multiple weights of the same nominal value in set assemblies are marked with dots or asterisks. In addition, a maximum of 3 user features (characters, letters and numbers) may be applied to clearly identify the weights as test or measuring equipment.
These user characteristics can be defined by the customer when placing the order.
What Is The Precision Of My Balance?What Is A Calibration Certificate?A calibration certificate provides required information on the weight to make the weight traceable to International System of Units (kg). The calibration laboratory also keeps a record of the calibration and all data that was used to make the calibration report. What is the difference in calibration certificates?
• There are two types of calibration reports, accredited and non-accredited. While both provide traceability to the International System of Measurement (SI), the differences are significant. The accredited calibration process meets the quality standards required of ISO/IEC 17025. In addition, the measurement process is inspected by an independent assessor group like NVLAP or A2LA to insure compliance. Accredited calibration certificates provide more detailed information about the measurement to meet the calibration requirements of regulatory agencies like the FDA, ISO and cGMP compliant manufacturing processes. Non-accredited certificates are controlled solely by the calibration laboratory.
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