Basic Electrical Measurements |
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Page 32
... tion curves . Since a large part of the error was caused by hyster- esis , it is reasonable to make separate up and down correction curves . For the sake of comparison , the overall average is also going to be shown and the improvement ...
... tion curves . Since a large part of the error was caused by hyster- esis , it is reasonable to make separate up and down correction curves . For the sake of comparison , the overall average is also going to be shown and the improvement ...
Page 42
... tion " is mentioned , it means that the pointer rotates from the ( arbitrarily selected ) zero to the 100 % points . The smaller the current needed to deflect the pointer fully , the greater is the sensitivity of the meter . Therefore ...
... tion " is mentioned , it means that the pointer rotates from the ( arbitrarily selected ) zero to the 100 % points . The smaller the current needed to deflect the pointer fully , the greater is the sensitivity of the meter . Therefore ...
Page 116
... tion or operational amplifiers . The self - balancing instruments are still in existence but only rarely purchased for new applications . 6.2.1.2 Measuring Resistance by Unbalanced Voltage The equation AV = V R3 R1 + R3 RA R2 + R4 can ...
... tion or operational amplifiers . The self - balancing instruments are still in existence but only rarely purchased for new applications . 6.2.1.2 Measuring Resistance by Unbalanced Voltage The equation AV = V R3 R1 + R3 RA R2 + R4 can ...
Common terms and phrases
ac bridges accuracy and precision accurate adjustable resistor ammeter average balanced calibration capacitance components construction current going decade box deviation plot digital meter diode electrical equation Example full-scale deflection full-wave germanium given Half-wave hysteresis input impedance linear loading effect loading error loop low resistances main resistor measured values measuring instrument ment meter movement meter resistance meter sensitivity midscale reading midscale resistance multiturn null detector number of significant Ohm's law ohms output impedance parallel ohmmeter PMMC meter PMMC movement pointer position potentiometer potentiometric circuits precision problem R₁ R₂ ranging resistor ratio reactance readability readout rectifier reference accuracy resis rotating scientific notation series ohmmeter shown in Figure shows shunt significant digits source output impedance span supply voltage switch tance tion true voltage units V₁ variable resistor Vave volt voltage drop voltage measured voltmeter Vrms Weston cell wiper ΚΩ