Basic Electrical Measurements |
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Page 5
... ment of 1235 m implies that the true length is between 1234.5 and 1235.5 m ( that is , 1235 + 0.5 and 1235 - 0.5 ) . Other examples : Written Number 203 kg 6.312 g 7 ft 9.052 X 107 Bq 63.200 N 52 000 J Implied Limits of the True Value ...
... ment of 1235 m implies that the true length is between 1234.5 and 1235.5 m ( that is , 1235 + 0.5 and 1235 - 0.5 ) . Other examples : Written Number 203 kg 6.312 g 7 ft 9.052 X 107 Bq 63.200 N 52 000 J Implied Limits of the True Value ...
Page 19
... ment . There is a problem , though , if there is a serious noncorrectable linearity error present . If this is the case , the span and zero adjust- ments can be made in such a way that there will be no error at 0 % and 100 % reading ...
... ment . There is a problem , though , if there is a serious noncorrectable linearity error present . If this is the case , the span and zero adjust- ments can be made in such a way that there will be no error at 0 % and 100 % reading ...
Page 74
... ment with Re is necessary . Example 3.14 The output signal of a transmitter has an output impedance of 5.6 k and the input impedance of the receiving instru- ment is 135 k . What is the true voltage and the error be- fore the ...
... ment with Re is necessary . Example 3.14 The output signal of a transmitter has an output impedance of 5.6 k and the input impedance of the receiving instru- ment is 135 k . What is the true voltage and the error be- fore the ...
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