Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
was operating correctly
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "was operating correctly" is correct and usable in written English.
You can use it to describe a situation where a machine, system, or process was functioning as intended in the past. Example: "The equipment was operating correctly during the test, which gave us confidence in its reliability."
✓ Grammatically correct
Science
News & Media
Academia
Alternative expressions(2)
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
3 human-written examples
But Nolan Barkhouse, an embassy spokesman, said the monitor was operating correctly.
News & Media
Prior to the eruption, JR Kyushu recently installed 360-degree lights at crossings, which allowed drivers and others to see that the crossing was operating correctly.
Science
The initial measurements were taken on pollen grains (cultivated Rye grass pollen, Sigma-Aldrich P9145-1G) using their broadband autofluorescence, Fig. 3(a), to ensure that the system was operating correctly before the use of animals.
Science
Human-verified similar examples from authoritative sources
Similar Expressions
57 human-written examples
These results indicate that the hybrid DEMUX was operated correctly.
Science
These results indicate that the front-end circuit was operated correctly.
Science
Each quarter a 'test' message is sent to make sure the Twitter account is operating correctly.
Academia
A department spokesman said all 55 cameras had been "operating correctly and accurately" while infected, but that the issue had been referred to the road safety camera commissioner.
News & Media
However, a spokesperson for Moscow's information technology department, which oversees surveillance cameras in the city, told the AP news agency that all cameras "belonging to the city" were operating correctly on the night of the shooting.
News & Media
Correlation-based model validity tests are introduced to monitor the operation of non-linear adaptive noise cancellation filters and to detect whether the filters are operating correctly or incorrectly.
Details of the designs are given, and measurements of scattering and impedance used to show that the active diffusers are operating correctly over a bandwidth of about 100 Hz to 1.1 kHz.
Availability concerns what percentage of time a system is operating correctly [1].
Science
Expert writing Tips
Best practice
When describing past events, use "was operating correctly" to clearly indicate that a system or device functioned as intended at that specific time. This avoids ambiguity about its current state.
Common error
Avoid using "was operating correctly" to describe the current state of a system. Use "is operating correctly" or "operates correctly" for present tense descriptions to prevent misunderstandings.
Source & Trust
84%
Authority and reliability
4.3/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "was operating correctly" primarily functions as a descriptive statement, indicating that something functioned as intended at a specific time in the past. According to Ludwig AI, the phrase is grammatically correct and usable in written English.
Frequent in
Science
33%
News & Media
33%
Academia
33%
Less common in
Wiki
0%
Formal & Business
0%
Encyclopedias
0%
Ludwig's WRAP-UP
In summary, the phrase "was operating correctly" is a grammatically sound and commonly used expression to describe a past state of proper functionality. According to Ludwig AI, the phrase is correct and usable in written English. It appears frequently in various contexts, including science, news, and academia, making it versatile for both formal and informal writing. When using this phrase, ensure you're accurately representing a past condition and consider alternatives like "functioned as expected" or "worked properly" to add nuance. Be cautious not to confuse the past state with the present; use "is operating correctly" to describe current functionality. By keeping these points in mind, you can effectively communicate the operational status of systems and devices with clarity and precision.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
functioned as expected
Focuses on meeting expectations rather than strict correctness.
worked properly
A more general term for correct operation.
performed correctly
Emphasizes the action of performing in a correct manner.
ran smoothly
Implies a lack of issues during operation.
was functioning well
Highlights the state of functioning in a positive way.
was in good working order
Focuses on the overall condition being suitable for work.
was up and running properly
Emphasizes the active and correct state of operation.
was working according to specifications
Highlights adherence to predefined standards.
was compliant with standards
Focuses on meeting regulatory requirements.
was in proper working condition
Stresses the state of being in a fit condition for work.
FAQs
How can I use "was operating correctly" in a sentence?
You can use "was operating correctly" to describe something that functioned as intended in the past. For example: "The sensor "was operating correctly" during the initial tests."
What are some alternatives to "was operating correctly"?
Alternatives include "functioned as expected", "worked properly", or "performed correctly", depending on the specific context.
Is it appropriate to use "was operating correctly" in formal writing?
Yes, "was operating correctly" is appropriate for formal writing, as it clearly and professionally describes a past state of proper function. Ludwig AI confirms its usability in written English.
What's the difference between "was operating correctly" and "is operating correctly"?
"Was operating correctly" describes a past state, while "is operating correctly" describes the current state. For example, "The machine "was operating correctly" yesterday, but now it is malfunctioning" versus "The machine "is operating correctly" at the moment".
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
84%
Authority and reliability
4.3/5
Expert rating
Real-world application tested