FIELD: smoking accessories.
SUBSTANCE: electrically controlled system which generates an aerosol containing means for detecting unfavourable conditions, such as a dry heater or an unauthorized heater type. System comprises electric heater (30) comprising at least one heating element for heating the aerosol-forming substrate, a power supply unit (14) and electrical circuit (16) connected to the electric heater and the power supply unit and having a storage device, wherein electrical circuit (16) is configured to determine an unfavourable condition, when ratio of initial electric resistance (R1) of heater (30) and change of electric resistance (R2-R1) from initial resistance is more than maximum threshold value or less than minimum threshold value stored in storage device, and with possibility of limiting supply to electric heater (30), or with possibility to provide indication to user in presence of unfavourable condition.
EFFECT: system has the advantage that no previously stored maximum resistance value is required, and therefore different heaters can be used in the system and allowance for deviations in resistance caused by production tolerances.
13 cl, 9 dwg
