Method for calibrating an infusion device

An 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 an inlet for a fluid and a second end as an outlet for a fluid, wherein the pump channel extends along a channel length between the first end and the second end on the pump device,
• 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, and
• a control device to control operation of the pump actuation mechanism,
• wherein, for pumping a fluid through the pump channel, the actuation device is actuatable to depress the flexible wall section at a depression location such that during one pump cycle the depression location moves along the channel length of the pump channel,
• wherein the control device is configured to form a difference between a measured profile, obtained by measuring a position of the actuation device along the vertical direction during one pump cycle, and a nominal profile prestored in the control device to obtain a difference profile, wherein the control device furthermore is configured to calculate, from the difference profile, a characteristic value for correcting and/or checking pump operation of the infusion device, and
• wherein an integral of the difference profile along the channel length is formed to obtain the characteristic value.