A condition monitoring unit for a fire detection and/or extinguishing control unit , comprising: - at least one current circuit connection for connecting the condition monitoring unit to at least one current circuit , wherein the current circuit has at least one participant (M 1 - M N ) which detects an event, - a measuring device for measuring values of currents (I L ) and/or voltages at the current circuit connection , - an analysis unit in which one or more threshold values (P 1 , P 2 ) can be stored, wherein - the analysis unit is designed to detect, in an operating mode at least, an event in which values of currents (I L ) and/or voltages measured by the measuring device exceed or fall below the at least one threshold value (P 1 , P 2 ), - a memory unit or an interface for transmitting data to an external memory unit, wherein - the condition monitoring unit is designed to store values of the currents (I L ) and/or voltages measured by the measuring device in the memory unit , in a learning mode at least, or to output the values via the interface to the external memory unit and to determine or change the threshold values (P 1 , P 2 ) depending on the stored values of the currents (I L ) and/or voltages, wherein the condition monitoring unit is designed to determine or change the threshold value(s) (P 1 , P 2 ) depending on the stored values of the currents (I L ) and/or voltages, to determine a frequency distribution of the measured values of the currents (I L ) and/or voltages and to select for threshold value(s) (P 1 , P 2 ) those values of the currents (I L ) and/or voltages which correspond respectively to a minimum in the frequency distribution and/or which correspond respectively to a mean value between adjacent maxima in the frequency distribution. - at least one current circuit connection for connecting the condition monitoring unit to at least one current circuit , wherein the current circuit has at least one participant (M 1 - M N ) which detects an event, - a measuring device for measuring values of currents (I L ) and/or voltages at the current circuit connection , - an analysis unit in which one or more threshold values (P 1 , P 2 ) can be stored, wherein - the analysis unit is designed to detect, in an operating mode at least, an event in which values of currents (I L ) and/or voltages measured by the measuring device exceed or fall below the at least one threshold value (P 1 , P 2 ), - a memory unit or an interface for transmitting data to an external memory unit, wherein - the condition monitoring unit is designed to store values of the currents (I L ) and/or voltages measured by the measuring device in the memory unit , in a learning mode at least, or to output the values via the interface to the external memory unit and to determine or change the threshold values (P 1 , P 2 ) depending on the stored values of the currents (I L ) and/or voltages, wherein the condition monitoring unit is designed to determine or change the threshold value(s) (P 1 , P 2 ) depending on the stored values of the currents (I L ) and/or voltages, to determine a frequency distribution of the measured values of the currents (I L ) and/or voltages and to select for threshold value(s) (P 1 , P 2 ) those values of the currents (I L ) and/or voltages which correspond respectively to a minimum in the frequency distribution and/or which correspond respectively to a mean value between adjacent maxima in the frequency distribution. <EOS>