The most important geometrical characteristics to be measured are the cylindrical shape of the syringe barrel, the coaxiality of the plunger to the syringe barrel and the sealing of the sealing surface of the plunger. With tolerances of 20 µm to 100 µm, the requirements for measurement uncertainty are in the medium range. To ensure that the test frequency can be kept sufficiently high, the measuring time must be correspondingly short.
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