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<br />14 <br /> <br />TECHNIQUES OF WATER-RESOURCES INVESTIGATIONS <br /> <br /> <br />, <br />, <br />1 <br /> <br />~ <br /> <br />" <br />-'-' <br /> <br />It! <br /> <br />Figure 19.-Sounding-weight hangers and hanger pins. <br /> <br /> <br />The E-53 reel is the largest reel commonly <br />used for current-meter measurements. This reel <br />will handle the heaviest sounding weights and <br />is designed exclusively for use with power <br />equipment. It has a handcrank for emergency <br />use. (See fig. 23.) <br /> <br />Sounding cable <br /> <br />Ellsworth reverse-lay two-conductor cable is <br />normally used on all sounding reels except the <br /> <br />f <br />1 <br /> <br />Figure 20...:-A-pack reel. <br /> <br />single-conductor Canfield reel which uses gal- <br />vanized steel aircraft cord. It is important that <br />the appropriate size cable-laying sheave be <br />used on the reels. <br /> <br />CORnectors <br /> <br />A connector is used to join the end of the <br />reel cable to the sounding-weight ha.nger. The <br />three types of connectors generally used are <br />types B, Au, and pressed sleeve. (See fig. 24.) <br />The type-B connector is used with A-55, B-56, <br />and E-53 reels. The Au connector is used with <br />the A-pack and Canfield reels although the <br />pressed-sleeve connector can be used on these <br />reels. The pressed-sleeve connector is used <br />mainly on handlines. (See p. 15.) <br /> <br />Depth indicators <br />A computing depth indicator is used on the <br />A-55, B-56, and E-53 reels. (See fig. 25.) The <br /> <br />Table 1.-Sounding reel data <br /> <br />Sounding cable <br /> <br />amb <br /> <br />Reel <br /> <br />Cable <br />diameter <br />(inches) <br /> <br />Drum <br />circum. <br />ference <br />(feet) <br /> <br />Ca.ble <br />capacity <br />(feet) <br /> <br />Maximum <br />size weight <br />mcom- <br />mended <br />(pounds) <br /> <br />Type <br />operation <br /> <br />Depth lnd1eator <br /> <br />A-packh____h EUsworth_________ 0.084 1 45 50 Counter h__ h__ No____ Hand. <br />Canfield__ _ n n Single .0625 1 45 50 _____do_________ No____ Do. <br /> conductor.1 <br />_\-55__________ Ellsworth_h__ _ _ __ .084 95 50 Self NOuh Do. <br /> 10 80 100 computing. <br />B-56_nh_n__ ____do___________ 10 1% 144 150 ____.do_________ YeSn__ Hand or <br /> .125 115 200 power. <br />E-53_____._________do___~____~~_ .10 2 206 150 _____do_________ yesh__ Power. <br /> 125 165 300 <br /> <br />I Some Canfield reels have been converted to double-conductor (lable but most of them are still used as sIngle-conductor reels. <br />