... quartz (1011 ) at the sample plan,b) Unclamp the fastening hand knob of the detector, move the detector to reach 26 ... the angle appearance through observing), then lock the hand knob.c) Rotate the hand wheel and transfer the sample to 13°20, regulate ... high-voltage and open X-ray shutter, slightly rotate the hand wheel until intensity is highest on uA meter indicator, at this ...