Sample cupsSample cups can be placed almost anywhere along the length of the Ettan IPGphor strip holder that is not blocked by a protrusion. For proper sealing of the cup to the gel, the feet of the sample cup must all rest on the bottom of the channel.CoverThe cover is used to ensure that the electrodes stay in place and that they are in good contact with the IPG strip. The cover also applies gentle pressure to ensure that the strip holder makes good contact with the IPGphor separation platformand power supply contact pads when the safety lid is closed.