more force pulses assuming that the capsule floats on the water surface at the start of the force curve a force curve is applied generating an odd number of force pulses having a step profile each odd force pulse brings about at least a partial immersion of the endoscopy capsule in the liquid and each even force pulse bring about at least a partial emersion of the endoscopy capsule out of the liquid application_number US 200913138355 A description reference will now be made in detail to the preferred embodiments examples of which are illustrated in the accompanying drawings wherein like reference numerals refer to like elements throughout fig1 a shows the stomach 10 of a patient 1 in a view which is not to scale an endoscopy capsule 20 with a permanent magnet 21 for carrying out a stomach screening is located in the stomach 10 the stomach 10 is partially filled with water 30 and the endoscopy capsule 20 floats on the water surface 31 the longitudinal axis of the endoscopy capsule 20 is oriented in fig1 a in the y direction the longitudinal axis of the endoscopy capsule 20 and the y direction do not have to coincide but may be at an angle of up to approximately 70 u00b0 relative to one another the y direction is defined hereinafter as the direction which is perpendicular to the water surface 31 thus the positive y direction is oriented out of the water 30 accordingly a movement in the negative y direction equates to the endoscopy capsule 20 being dipped in.