Voltmeter
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https://term.museum-digital.de/md-de/tag/6449
- Note
- A voltmeter is an instrument used for measuring electric potential difference between two points in an electric circuit. It is connected in parallel. It usually has a high resistance so that it takes negligible current from the circuit.
Analog voltmeters move a pointer across a scale in proportion to the voltage measured and can be built from a galvanometer and series resistor. Meters using amplifiers can measure tiny voltages of microvolts or less. Digital voltmeters give a numerical display of voltage by use of an analog-to-digital converter.
Voltmeters are made in a wide range of styles, some separately powered (e.g. by battery), and others powered by the measured voltage source itself. Instruments permanently mounted in a panel are used to monitor generators or other fixed apparatus. Portable instruments, usually equipped to also measure current and resistance in the form of a multimeter are standard test instruments used in electrical and electronics work. Any measurement that can be converted to a voltage can be displayed on a meter that is suitably calibrated; for example, pressure, temperature, flow or level in a chemical process plant.
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Voltmeter
Viereckiges Gehäuse, das sich...
Object information
Image: Museum Schloss Bernburg - CC BY-NC-SA -
Werbeprospekt: AEG Rundfunkgeräte AEG Neutrodyn, AEG Detektorempfänger Modell D, AEG Zweirörhen-Niederfrequenz-Verstärker Modell Dv, sowie AEG Lautsprecher und Radio-Voltmeter
AEG Rundfunkgeräte AEG...
Object information
Image: Stiftung Deutsches Technikmuseum Berlin - CC0 -
Röhrenvoltmeter HF 2897 Frontansicht; Foto 1953
Röhrenvoltmeter HF2897,...
Object information
Image: www.industriesalon.de - CC BY-SA -
Röhrenvoltmeter HF 2897 Rückansicht geschlossen; Foto 1953
Röhrenvoltmeter HF2897,...
Object information
Image: www.industriesalon.de - CC BY-SA -
Universal- Röhrenvoltmeter, vorn, Foto 1955
Gesamtansicht eines...
Object information
Image: www.industriesalon.de - CC BY-SA
References
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