A method for testing electrochemical cells applies to a portion of a cycle of a low-frequency excitation waveform to a cell under test while maintaining an amplitude of the excitation waveform below a threshold value. The method includes a new wash step which increases the tissue repair properties of the TRCs of the invention. An alternating current conversion type surface potential sensor is provided to detect a potential of the surface of the photoconductive member. A controller circuit within the housing calculates the difference between currently measured tension between the head of the bolt and the workpiece surface and an initially measured tension. Also provided is a method of preparing an electrode including the metal catalyst. The transporter and sorter may be used in connection with various electronic component manufacturing processes.