non ecls types of devices in which this pressure feedback control feature may be incorporated include but are not limited to devises used for apheresis autotransfusion hemodialysis hemofiltration plasmapheresis photopheresis etc ecls devices 12 may also include modifications to the controller software aimed at streamlining the initial start up and testing of the ecls device specifically as mentioned above the ecls device may include a controller c which may be programmed to perform self tests of the overall system performance and bubble detector and to display information and error signals in ways that facilitate rapid location and correction of any detected problems fig4 through 9 are screen shots showing examples of information that may appear on the screen of the user interface 24 during preparation and pre testing of the ecls device 12 fig1 a through 10d show enlarged views of the error signals associated with each of the screen shots shown in fig4 through 8 fig4 and 10a show information displayed on the screen of the user interface 24 during the device performance or system test with reference to the device components shown in fig1 a and 3 this performance or system test checks whether the device 12 after the patient module 22 has been fully filled with fluid can generate pre determined flow rates the device 12 has clamps that directly affect the flow rate because of this the performance test includes three.