Maintenance and calibration


Bilanciai Porro Srl and Metrology Laboratory "SBM" run on behalf of their customers a periodic maintenance schedule. This type of service allows our customers, especially those who work under the quality assurance in accordance with the standards of ISO 9000, to enter into periodic contracts which define the monthly deadlines for interventions on their instruments.


The Assistance Service under such agreements will comprise interventions on the scheduled dates, ensuring punctuality and meeting the deadlines so as to free the customer from the burden of having to monitor and schedule technical operations of maintenance and / or calibration of their instruments.


Ordinary maintenance

It's a work process that entails checks of mechanical and electronic parts of weighing instrument so as to restore the original operational characteristics, eliminate faults, prevent the occurrence of failures and improve performance.

This also includes updating metric provisions according to the updated legislation, software upgrades, cleaning / lubrication of main components and peripherals, replacement of parts subject to wear, the tuning of the instrument.


After such maintenance we can apply labels indicating that the instrument has been inspected and serviced, as well as fill out specific Maintenance Reports.


Calibration and certification

This is an intervention which, through a series of specific tests, determines the error, defined as the difference between the value provided by the indicator device and the theoretical value of the sample attributable to national IS standards, together with an uncertainty of measurement.

Measurements are made by the staff of our Calibration / Certification Service and are made on the basis of the relevant Operating Instructions of the SQ of Bilanciai Porro using reference samples that are fully calibrated and certified by Calibration Laboratories ACCREDIA.


This type of operation is similar to a "snapshot" of metrological performance of the instrument and, contrary to what we usually think, implies no correction of the errors found. You are correct, if you think that:
* measurement of errors that do not comply with their quality standards is entrusted solely to the customer; * error correction that does not leave a trace does not allow the customer to be able to correctly set the frequency of calibration.

The measurement results of calibration interventions are stored and processed in a document that the customer can use to satisfy the requirements of UNI EN ISO 9000 (management tools used in the detection of critical sizes).

Over the years, our Metrology Laboratory has developed various types of documents (Calibration Reports) that can be adapted to the specific needs of the customer by implementing, in some cases, the criteria for acceptability of measurements (Test Reports).

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