The Model OTS-567B is a Portable Oxygen Test Stand used for performing acceptance tests on breathing regulators of the 100% oxygen, diluterdemand and positive pressure types. The OTS-567B automatically sets the altitude and flow rates at user programmable values and generates reports with passfail results.The computer calculates the altitude, flowleak rate, outlet pressuresuction and the ratio of added oxygen to the total flow (for diluterdemand regulators.) Automatic conversion to equivalent oxygen gas flow and equivalent percent-added oxygen prevents the potential for errors commonly made when calibration graphs, tables or charts are used. Test data can be displayed on screen, saved in electronic format or printed if a hard copy is desired.