electronic voltmeter

Thân thiện

An engineer uses an electronic voltmeter to test a circuit board.

Definition

1. Noun:
   • An electronic voltmeter is a measuring instrument used to determine the electrical potential difference (voltage) between two points in a circuit. Its sensitivity is increased by electronic amplification, allowing it to measure very small voltages more accurately than a non-amplified meter.

Usage Examples

• Noun:
  • The technician used an electronic voltmeter to check the low-voltage signal from the sensor.
  • For precise measurements in the microvolt range, an electronic voltmeter is essential.

Advanced Usage

• In technical contexts: The term specifically distinguishes voltmeters that use active electronic components (like transistors or operational amplifiers) for signal amplification from simpler, passive analog meters (like moving-coil voltmeters).
  • The design of the electronic voltmeter incorporates a high-input-impedance amplifier to prevent circuit loading.

Variants and Related Words

• Digital voltmeter (DVM): A common type of electronic voltmeter that displays the measured voltage as a numerical digit. All DVMs are electronic voltmeters, but not all electronic voltmeters are digital (some may have analog displays).
• Voltmeter: The general term for any instrument that measures voltage. "Electronic voltmeter" is a subtype of this category.
• Multimeter: An electronic instrument that can measure voltage, current, and resistance. Its voltage measurement function is an electronic voltmeter.

Synonyms

• Amplified voltmeter
• Active voltmeter

Related Phrases

• To measure voltage with an electronic voltmeter: The standard phrase for using the instrument.
  • Always ensure the electronic voltmeter is set to the correct range before you measure voltage.

Học thuật

Noun

1. a voltmeter whose sensitivity is increased by amplification