Electrical Measurements in Principle and Practice |
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Page 77
... full - scale reading is indicated , then the strip must be heated slowly and a separate heater and suitable thermal lagging provided . For intermediate periods a compromise between these methods is effected . Where the strip does not ...
... full - scale reading is indicated , then the strip must be heated slowly and a separate heater and suitable thermal lagging provided . For intermediate periods a compromise between these methods is effected . Where the strip does not ...
Page 140
... scale . Twice full - scale reading , or four times full - scale watts , there- fore , must have caused appreciable heat to be developed . The application of 10 or 100 times full scale value , either in volts or amperes , is , therefore ...
... scale . Twice full - scale reading , or four times full - scale watts , there- fore , must have caused appreciable heat to be developed . The application of 10 or 100 times full scale value , either in volts or amperes , is , therefore ...
Page 224
... full scale , the corresponding current being 5 μA at 50 cycles per second . This provides a means of measuring ... scale commences at about 1 / 5th of full scale value , the maximum reading of 20 times the instru- ment resistance ...
... full scale , the corresponding current being 5 μA at 50 cycles per second . This provides a means of measuring ... scale commences at about 1 / 5th of full scale value , the maximum reading of 20 times the instru- ment resistance ...
Contents
PART I | 1 |
CHAPTER IISTANDARDS ΙΟ | 10 |
in Xray circuits peak r m s and mean readings milli | 17 |
23 other sections not shown
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Common terms and phrases
accuracy adjusted alternating current ammeter ampere-hour ampere-turns amperes angle anode apparatus balance ballistic galvanometer battery cable calibrated capacitance cell circuit comprises condenser conductor connected constant core current transformers cycles per second damping deflection dial direct current disc dynamometer earth electrical electrodes electrostatic voltmeter equal error flux frequency full scale grid high resistance indicating instrument instru insulation resistance lamp linear load magnetic field magnetising maximum means measured megohms ment meter method metre milliammeter milliamperes movement moving coil instrument moving iron instrument mutual inductance necessary null obtained ohmmeter ohms operation oscillograph overload permanent magnet photometer pivoted pointer possible potential divider potentiometer power factor proportional pyrometer r.m.s. value R₁ range ratio reactance reading sensitivity series resistance shows shunt slide wire standard suitable supply switch temperature thermal thermo-couple three-phase torque units usually V₁ V₂ valve variable varying vibration volt-amperes voltage volts wattmeter wave-form Wheatstone Bridge whilst winding zero