In the industry, in the assembling production lines, in mass production, very often are popular special dedicated systems, so-called calibration benches, with which it is possible to ensure the correct performance and calibration of production torque tools, pneumatic, electric or electronic power tools and torque wrenches. Most important problems are encountered during the transfer of the torque unit from the accredited laboratories to the industrial laboratories. For this purpose was designed a portable calibration system named Calibration Bell, particularly dedicated to calibration of torque transducers installed in the calibration benches of its production. In the paper the main metrological characteristics of these systems, evaluated during the assessment of the Calibration Centre are reported.
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