the invention relates to a method for adjusting a cryogenic refrigeration apparatus including a plurality of liquefiers / refrigerators arranged in parallel in order to cool a single device . the method includes a step of calculating in real time the dynamic mean value of at least one operating parameter for all the liquefiers / refrigerators . the apparatus controlling in real time the at least one valve for controlling the stream of working gas of at least one liquefier / refrigerator in accordance with the difference between the instantaneous values of the parameter relative to said dynamic converge toward said dynamic mean value .