Device and method for verifying the correct setup of a blood treatment apparatus

A method for automatically verifying correct setup of a blood treatment apparatus, the blood treatment apparatus comprising only one scale, a hose system, and a control unit, wherein the hose system comprises at least three line portions for connection to at least one drainage bag, at least one solution bag and a patient line, the method comprising:

• detecting a combined weight and/or a combined change in weight of the solution bag and the drainage bag measured by the scale during a filling process of the hose system;
• comparing the combined weight and/or the combined change in weight to an expected value;
• and
• blocking a start of a blood treatment and generating an output by the control unit when a deviation of the combined weight and/or the combined change in weight of the solution bag and the drainage bag from the expected value or a tolerance range of the expected value is determined, wherein
• the output comprises instructions for a problem solving routine, the output being in a form of an acoustic signal and/or a visual signal prompting a user to check a crushing cone of the at least one solution bag and/or to check clamps or shut-off elements arranged on the hose system and/or to check whether the line portions of the hose system are correctly connected.