A modular exhibit system includes modular components capable of easy assembly, disassembly, and reuse. An absorbent pad can be disposed between the test strip and capillary tube for spreading-out the fluid being transferred to the test strip. The discharging of scan lines is performed a designated number of scan lines apart so as to achieve the purpose of preventing the liquid crystal display from generating display delay and exhibiting an image-sticking phenomena. The modulation method and signal bandwidth can be varied depending on errors to provide optimum communications capacity via any particular line, and a ratio of upstream to downstream information packets can be varied depending on buffer fills at the modems. No lime and no carbon dioxide are required to be contacted with the juice or the permeate in this process.