Electrical Instruments and Measurements |
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Page 389
... impedance Z11 w Output impedance Zero - impedance voltage sources Z22 12 w E'1 = Z12 / 2 E12 = Z21 / 1 Load impedance E2 ZL Reverse or " feedback " transimpedance Forward transimpedance Fig . 12-24 Equivalent circuit using impedance ...
... impedance Z11 w Output impedance Zero - impedance voltage sources Z22 12 w E'1 = Z12 / 2 E12 = Z21 / 1 Load impedance E2 ZL Reverse or " feedback " transimpedance Forward transimpedance Fig . 12-24 Equivalent circuit using impedance ...
Page 428
... impedance of the divider were 5 ohms and the load impedance 10,000 ohms , the drop in the loaded output volt- age , from its open - circuit value , would be 5 / 10,000 or 0.05 percent . When properly used , within its limitations as to ...
... impedance of the divider were 5 ohms and the load impedance 10,000 ohms , the drop in the loaded output volt- age , from its open - circuit value , would be 5 / 10,000 or 0.05 percent . When properly used , within its limitations as to ...
Page 437
... impedance . Where greater accuracy is required , the bridge circuit shown in Fig . 13-19 must be used . With this circuit , the adjustable impedance Power source Standard meter Ratio transformer Adjustable impedance S1 0000000000000 G ...
... impedance . Where greater accuracy is required , the bridge circuit shown in Fig . 13-19 must be used . With this circuit , the adjustable impedance Power source Standard meter Ratio transformer Adjustable impedance S1 0000000000000 G ...
Contents
preface | 1 |
voltage and current measurements | 13 |
indicating instruments | 60 |
Copyright | |
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accuracy adjusted angle applied arms arrangement balance basic bridge calibration capacitance capacitor cell circuit coil Company compared connected constant core correction deflection depends determined dial difference direct Division drop effect electrical element equal error example factor field Figure fixed flow flux frequency galvanometer heat impedance increase indicated inductance inductor input instrument junction known leads length less limit load lower magnetic means measurement ments meter method mounted moving nominal obtained ohms operation output parallel percent phase position potential potentiometer precision primary produce proportional Radio range ratio reading reference resistance resistors result scale secondary sensitivity shield shown in Fig shows shunt standard standard cell supply switch temperature terminals torque transformer turns units unknown usually voltage voltmeter volts wattmeter Weston winding wire zero