A blood flow control system, tension adjustable instrument and a method are disclosed. According to one aspect of the invention, after a first dimension separation in a first microchannel, the sample material is electrokinetically and simultaneously transferred to an array of microchannels in the second dimension. The shell may be removably coupled to the jacket using magnetic coupling. For arterial tissue or tissue lining a body cavity, the device can also be equipped with width gauges that measure the diameter of the artery lumen or the width of any section of the body cavity. In a load transient, the quick response signal triggers a quick transient response period to increase the operational frequency of the converter. A processor executes instructions from an application program module stored in the controller to perform a function of the configuration data for an electroluminescent device system selected from the multiple electroluminescent device systems in the internal electroluminescent device system configuration database.