[en] In this measuring device which is applied, e.g., in nuclear medicine, the energy spectrum of the radionuclides used is split up into channels according to voltage-pulse ranges (multi-channel analyzer). Each channel has got associated with it a number and an energy range, being all stored in a memory. The energy calibration of the measuring equipment is done by means of a comparator circuit having got stored the energy spectrum, especially characteristic maxima, of ¹³⁷Cs, also split up into different channels. On deviation from a desired value determined by calculation there may be given alarm or the energy calibration may be automatically carried out. (DG)