wattmeter
C1technical
Definition
Meaning
A device that measures electric power in watts.
An instrument used in electrical engineering to measure the real power (active power) in an electrical circuit, typically by measuring voltage and current and calculating their product.
Linguistics
Semantic Notes
A compound noun formed from 'watt' (the SI unit of power) and 'meter' (a measuring device). It refers specifically to an instrument for measuring electrical power, not voltage or current alone.
Dialectal Variation
British vs American Usage
Differences
Spelling remains the same. UK English may historically use 'wattmeter' and 'watt-meter' interchangeably, but the closed form is now standard. US English consistently uses 'wattmeter'.
Connotations
None; purely technical term with identical meaning and application in both varieties.
Frequency
Equally low-frequency and specialized in both UK and US English, used almost exclusively in electrical engineering, physics, and related trades.
Vocabulary
Collocations
Grammar
Valency Patterns
[Subject] connected the wattmeter to [Object/Circuit].The [Adjective] wattmeter measured [Quantity].Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “None”
Usage
Context Usage
Business
Rare, except in procurement for electrical equipment.
Academic
Used in engineering and physics textbooks, lab reports, and research papers on electrical systems.
Everyday
Virtually never used in everyday conversation.
Technical
The primary register. Used by electricians, engineers, and technicians when testing or diagnosing electrical circuits and devices.
Examples
By Part of Speech
verb
British English
- The engineer will wattmeter the circuit to verify its consumption.
- We need to wattmeter the new appliance.
American English
- Technicians wattmetered the solar array to check its output.
- The procedure requires you to wattmeter the load.
adjective
British English
- The wattmeter reading was stable.
- We need a wattmeter calibration certificate.
American English
- The wattmeter data is logged automatically.
- Follow the wattmeter connection diagram.
Examples
By CEFR Level
- (Too technical for A2. Use a more general sentence.) The machine has a meter to measure electricity.
- The electrician used a special device called a wattmeter to check the power.
- Before installing the new motor, they connected a wattmeter to ensure it wouldn't overload the circuit.
- The precision wattmeter indicated a power factor of 0.87, revealing significant reactive power in the system.
Learning
Memory Aids
Mnemonic
Think: A WATT-METER is a meter for WATTs, just like a thermometer is for heat and an odometer is for distance.
Conceptual Metaphor
A specialized sense organ for an electrical circuit, allowing one to 'see' or 'hear' (via a reading) how much power it is consuming.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not confuse with 'вольтметр' (voltmeter) or 'амперметр' (ammeter). 'Wattmeter' is specifically 'ваттметр'.
Common Mistakes
- Misspelling as 'whatmeter' or 'watmeter'.
- Using it to refer to a device that measures only voltage or current.
- Incorrect plural: 'wattmeters' (correct), not 'wattmeter'.
Practice
Quiz
What does a wattmeter measure?
FAQ
Frequently Asked Questions
No. A multimeter can measure voltage, current, and resistance separately. A wattmeter is specifically designed to measure power (watts) directly, often by measuring voltage and current simultaneously and computing the product.
In electrical engineering laboratories, power plants, industrial settings to monitor machinery, and by energy auditors to measure the power consumption of household or commercial appliances.
The electrodynamometer-type wattmeter, which became a standard, was developed in the late 19th century. It is often associated with the work of scientists like Otto Bláthy, Miksa Déri, and Károly Zipernowsky, and later refined by others like Elihu Thomson.
Yes, consumer-grade plug-in wattmeters (or energy monitors) are available. You plug them into a wall socket and then plug an appliance into them to see its real-time power consumption and calculate energy cost.