Basic Electrical Measurements |
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Page 62
... voltmeter is directly across the unknown and receives the correct voltage , but the ammeter reading includes the current drawn by the voltmeter . In ( b ) the current is correct , but the voltmeter reading is too large by the amount of ...
... voltmeter is directly across the unknown and receives the correct voltage , but the ammeter reading includes the current drawn by the voltmeter . In ( b ) the current is correct , but the voltmeter reading is too large by the amount of ...
Page 169
... voltmeter has been calibrated at a previous time , and a check calibration is desired , the pointer of the meter is ... Voltmeter Potentiometer Volt Box Steady DC Supply FIG . 8-1 . Calibration of a voltmeter by a potentiometer . Note ...
... voltmeter has been calibrated at a previous time , and a check calibration is desired , the pointer of the meter is ... Voltmeter Potentiometer Volt Box Steady DC Supply FIG . 8-1 . Calibration of a voltmeter by a potentiometer . Note ...
Page 414
... voltmeter . The current drawn at full - scale is the reciprocal of this number , or 0.01 amp . In some circuits the current drawn by the voltmeter becomes an important matter . A current of 0.01 amp is insignificant if we are testing a ...
... voltmeter . The current drawn at full - scale is the reciprocal of this number , or 0.01 amp . In some circuits the current drawn by the voltmeter becomes an important matter . A current of 0.01 amp is insignificant if we are testing a ...
Contents
DEVELOPMENT OF THE ELECTRICAL UNITS | 1 |
EXPERIMENTAL PROCEDURES ERRORS | 18 |
AIDS TO COMPUTATION | 41 |
Copyright | |
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accuracy adjustment ammeter amount angle application arrangement balance bridge burden calibration capacitance cause cell cent circuit coil comparison component computed connected constant construction convenient correct Courtesy curve cycles damping deflection depends desired detector determined diagram dial direction effect electrical element equal equation error factor field Figure Find flux frequency galvanometer given gives greater ground impedance important increase indicated inductance instrument limit load magnetic material means measurements ment meter method moving needed obtained ohms operating parallel particular phase placed pointer position possible potential potentiometer primary produced quantity R₁ range ratio reading reason Reference represents resistance resistor result scale secondary sensitivity shield shown in Fig shows shunt standard switch temperature terminals torque transformer turns units unknown usually voltage voltmeter wattmeter winding wire zero