Method for calibrating an infusion device, the infusion device comprising: a pump device having a housing part and a flexible wall section together forming a pump channel through which a fluid is to be pumped, wherein the pump channel has a first end as inlet for a fluid and a second end as outlet for a fluid, wherein the pump channel extends along a channel length between the first end and the second end, a pump actuation mechanism having an actuation device for acting onto the flexible wall section along the channel length of the pump channel for locally depressing the flexible wall section in a vertical direction in order to pump a fluid through the pump channel, the actuation device being displaceable with respect to a housing section of the pump actuation mechanism along the vertical direction, wherein the actuation device is constituted as a tumbling device performing a tumbling movement for acting onto the flexible wall section, and a control device to control the operation of the pump actuation mechanism, wherein, for pumping a fluid through the pump channel, the actuation device is actuated to depress the flexible wall section at a depression location, wherein the depression location during one pump cycle moves along the channel length of the pump channel, characterized by the following steps: measuring the position of the actuation device along the vertical direction during one pump cycle to obtain a measured profile, forming a difference between the measured profile and a nominal profile prestored in the control device to obtain a difference profile, calculating, from the difference profile, a characteristic value for correcting and/or checking the pump operation of the infusion device. a pump device having a housing part and a flexible wall section together forming a pump channel through which a fluid is to be pumped, wherein the pump channel has a first end as inlet for a fluid and a second end as outlet for a fluid, wherein the pump channel extends along a channel length between the first end and the second end, a pump actuation mechanism having an actuation device for acting onto the flexible wall section along the channel length of the pump channel for locally depressing the flexible wall section in a vertical direction in order to pump a fluid through the pump channel, the actuation device being displaceable with respect to a housing section of the pump actuation mechanism along the vertical direction, wherein the actuation device is constituted as a tumbling device performing a tumbling movement for acting onto the flexible wall section, and a control device to control the operation of the pump actuation mechanism, wherein, for pumping a fluid through the pump channel, the actuation device is actuated to depress the flexible wall section at a depression location, wherein the depression location during one pump cycle moves along the channel length of the pump channel, measuring the position of the actuation device along the vertical direction during one pump cycle to obtain a measured profile, forming a difference between the measured profile and a nominal profile prestored in the control device to obtain a difference profile, calculating, from the difference profile, a characteristic value for correcting and/or checking the pump operation of the infusion device.