A method of calibrating a burner device for liquid fuels, wherein the method comprises at least the following steps: a) controlling the burner device with a first power stage, wherein a first blower speed and a first fuel pump speed is assigned to the first power stage; and b) measuring a first measured value of at least one measurand, in particular a CO2 value and / or a CO value and / or an O2 value and / or a soot number and / or an emission value and / or a temperature and / or a nitrogen oxide value, in the exhaust region of the burner device; and c) checking whether the first measured value is within a predetermined first setpoint range; and d) changing the first blower speed by manually entering or automatically adjusting a new first blower speed or a value corresponding to a new first blower speed if the first measured value is outside the predetermined first setpoint range; or changing the first fuel pump speed by manually entering or automatically adjusting a new first fuel pump speed or a value corresponding to a new first fuel pump speed if the first measured value is outside the predetermined first setpoint range; and e) assigning the new first blower speed or the new first fuel pump speed to the first power stage; and f) repeating steps a) to e) for a second power stage, wherein the burner device is controlled with the second power stage, a second measured value is measured and it is checked whether it is in a predetermined second setpoint range, a second blower speed or a second fuel pump speed is changed if the second measured value is outside the predetermined second setpoint range, wherein a new second blower speed or a new second fuel pump speed is assigned to the second power level, characterized in that in calibrating each individual power stage (210, 211), a monitoring value, namely a flame resistance value or a flame signal current corresponding to a flame resistance, is determined and then saved as a new monitoring setpoint for the respective power stage (210, 211). a) controlling the burner device with a first power stage, wherein a first blower speed and a first fuel pump speed is assigned to the first power stage; and b) measuring a first measured value of at least one measurand, in particular a CO2 value and / or a CO value and / or an O2 value and / or a soot number and / or an emission value and / or a temperature and / or a nitrogen oxide value, in the exhaust region of the burner device; and c) checking whether the first measured value is within a predetermined first setpoint range; and d) changing the first blower speed by manually entering or automatically adjusting a new first blower speed or a value corresponding to a new first blower speed if the first measured value is outside the predetermined first setpoint range; or changing the first fuel pump speed by manually entering or automatically adjusting a new first fuel pump speed or a value corresponding to a new first fuel pump speed if the first measured value is outside the predetermined first setpoint range; and e) assigning the new first blower speed or the new first fuel pump speed to the first power stage; and f) repeating steps a) to e) for a second power stage, wherein the burner device is controlled with the second power stage, a second measured value is measured and it is checked whether it is in a predetermined second setpoint range, a second blower speed or a second fuel pump speed is changed if the second measured value is outside the predetermined second setpoint range, wherein a new second blower speed or a new second fuel pump speed is assigned to the second power level,