Since 1994, CT2M has been accredited by COFRAC* for mass calibration (scope of accreditation no. 2-1292 available on the website www.cofrac.fr).
High-performance calibration resources
The different areas of the laboratory:
Weight calibration laboratory (1 mg - 5 kg)
| Mass | Expanded uncertainty (k=2) | Mass | Expanded uncertainty (k=2) |
|---|---|---|---|
| 1 mg, 2 mg et 5mg | 2,0 µg | 10 g | 20 µg |
| 10 mg | 2,6 µg | 20 g | 26 µg |
| 20 mg | 3,3 µg | 50 g | 33 µg |
| 50 mg | 4,0 µg | 100 g | 53 µg |
| 100 mg | 5,0 µg | 200 g | 0,10 mg |
| 200 mg | 6,6 µg | 500 g | 0.26 mg |
| 500 mg | 8,0 µg | 1 kg | 0,50 mg |
| 1 g | 10 µg | 2 kg | 3,3 mg |
| 2 g | 13 µg | 5 kg | 8,3 mg |
| 5 g | 16 µg |
Weight calibration laboratory (10 kg - 1t)
| Mass | Expanded uncertainty (k=2) |
|---|---|
| 10 kg | 16 mg |
| 20 kg | 30 mg |
| 50 kg | 200 mg |
| 60 kg | 200 mg |
| 100 kg | 1,6 g |
| 200 kg | 3,3 g |
| 500 kg | 8,3 g |
| 1000 kg | 15 g |
Weight calibration laboratory (2t - 5t)
| Mass | Expanded uncertainty (k=2) |
|---|---|
| 2000 kg | 33 g |
| 5000 kg | 80 g |
Weights ≥ 1 t: our specificity and expertise
The CT2M has calibration facilities for calibrating masses of up to 5 tonnes. This type of calibration requires special equipment and know-how:
- appropriate handling equipment (overhead travelling crane)
- custom-built comparators (our comparator has a resolution of 10 g, enabling calibration of masses of 2 and 5 tonnes)
- high quality standards
Calibration and verification
| Calibration only | Calibration + verification |
|---|---|
| Supply of a calibration certificate stating : | Supply of a calibration certificate and a verification certificate |
| the 'true' value of your mass (called the conventional mass) + the associated calibration uncertainty | The declaration of conformity can be based on regulatory texts (OIML R111 or circular masses) OR on your own MTE (Maximum Tolerated Errors). |
| This service is suitable if you use your mass based on its "true" value (e.g. 50.0023 g). | This service is suitable if you use your weight at its nominal value (e.g. 50 g). |
OIML R111
OIML R111 defines classes of weights used in legal metrology. For example, for standards used to calibrate supermarket scales. This classification is also commonly adopted by laboratories not subject to legal metrology, although it is not compulsory for them.
Specific MTE (Maximum Tolerated Errors)
Outside legal metrology, you have the possibility to define your own MPMEs and calibration uncertainties according to your needs.
Adjusting and maintaining traceability
If your standards do not conform (too heavy or too light), we can adjust them to make them conform to the defined EMT. Adjustment involves adding or removing material by abrasion, sanding or using the adjustment cavity.
Before any work is carried out on your weights (adjustment or recalibration), we carry out an initial calibration to guarantee the traceability of your standard since the last calibration. Note that this prior calibration is mandatory in legal metrology.
At your service
*French Accreditation Committee (COFRAC
A national body that assesses the competence and impartiality of laboratories to give you confidence in their services.
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