. A new thermo-electric fluid-meter and hot-wire anemometer. ,The curve a represents the drop of potential acrossthe balancing resistance B as a function of thecurrent through the heater H. The curve b showsvariations of the thermal e. m, f» and is approximate-ly proportional to the second power of the currentthrough the heater, while the drop across the re-sistance E varies directly. The point of inter-section C of these curves is that point at which thethermal e. m. f. developed by the couple equals thedrop across the resistance B^j^* In order to obtain ahigh value of thermal e. m. f* it is
. A new thermo-electric fluid-meter and hot-wire anemometer. ,The curve a represents the drop of potential acrossthe balancing resistance B as a function of thecurrent through the heater H. The curve b showsvariations of the thermal e. m, f» and is approximate-ly proportional to the second power of the currentthrough the heater, while the drop across the re-sistance E varies directly. The point of inter-section C of these curves is that point at which thethermal e. m. f. developed by the couple equals thedrop across the resistance B^j^* In order to obtain ahigh value of thermal e. m. f* it is desirable toheat the filament to a high temperature in this typeof cell. The maximum current that can be used with-out affecting the constancy of the cell, is thatvalue which will bring the filament to a dull redheat when viewed in a dark room. Under actualoperating conditions, the filament current is general-ly maintained somewhat below this value to prevent PLAT£ /i/^£/no/vj£r£f< PAO£ £09. seyfcalichA 7Hef^MO-£L £CrA/C Sr/I/VOAPOCEL M^/VGAA///^
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License: Licensed
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Keywords: ., bookcentury1900, bookdecade1920, bookidnewthermoele, bookyear1920
