UNCLASSIFIED yy APPENDIX B CALIBRATION OF THE ROLLER ANALYZER by Frank Celio Bel INTRODUCTION AND SUMMARY ORE Te wr The Roller particle size analyzer,* Fig. B.1, was used to separate the particles under study, The Roller analyzer was used for the par~ ticle size separation of coral (Cacos, density 2.3 g/cc) in the O44 » range, The Roller analyzer and the Calibration curves in the in- lowing ranges: e2 0-5, 5-10, 10-20, 20-30, and 30-40 1. OPERATIONAL FUNCTION 1, The air is pumped from the air compressor to an oil filter and then proceeds to the capillary flowmeter where the proper rate of flow is selected. 2, Three paper thimble filters connected in parallel are used - to remove any impurities in the air, 3. The air passes through the Laboratory Lectrodryer™ (an wm particles, Since the coral in question was not spherical, it was necessary to calibrate the instrument for the coral, Separation was achieved experimentally with favorable and usable resuits in the fole« net ee ee De ee ne + struction mamual are designed for the size separation of spherical activated alumina system) in which it is dried to 3 per cent relative humidity at room temperature. : ¥inInstrument for particle size separation made by the American Instrument Company, Silver Spring, Maryland xtHanufactured by the Pittsburgh Lectrodryer Corporation, Pittsburgh, Pennsylvania 9 UNCLASSIFIEDED OnFe Ji vr The air ig passed through the humidifying solution, which on 5. gives it a 25 per cent relative humidity at room temperature, 6 It then passes through a water trap and flows directly to the sample in the glass tube, ET Seg PT kh. <A Drierite train is next in the system. When it turns a pinkish color, the Lectrodryer must be reactivated,