Electrical Measuring Instruments

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Electrical Measuring Instruments Chapter 1
Principles of Meter Operations Electrical Systems
Series 724.1
PowerPoint Masters
720724.1-01PP
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Fig. 1-1. Hand-held digital measuring instrument
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Fig. 1-2. Basic functions of a digital meter
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Fig. 1-3. Single-slope integration
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Fig. 1-4. Graphs of signal states in a
single-slope integration meter
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Fig. 1-5. Circuit diagram, dual-slope integrator
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Fig. 1-6. Output of a dual-slope integrator
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Fig. 1-7. Seven-element digit display
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Fig. 1-8. Analog meter
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Fig. 1-9. DArsonval meter movement
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Fig. 1-10. Deflection of the movable coil as
current is applied
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Fig. 1-11. Electrodynamometer movement
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Fig. 1-12. All three electrodynamometer coils in
series
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Fig. 1-13. Plunger-style moving-vane meter
movement
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Fig. 1-14. Radial-vane meter movement
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Fig. 1-15. Concentric-vane meter movement
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Fig. 1-16. The parallax effect
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