In hydraulic and lever amplification machines, the lower values for the CMC can only be achieved by the correction of any systematic component of the amplification effect. For the determination of the CMC of the comparator type force calibration machine, the machine’s incorporated reference force transducer(s) should, if possible, first be calibrated in a force standard machine to determine relevant metrological characteristics – calibration of the force calibration machine should then be carried out using force transfer standards.