Communities

Writing
Writing
Codidact Meta
Codidact Meta
The Great Outdoors
The Great Outdoors
Photography & Video
Photography & Video
Scientific Speculation
Scientific Speculation
Cooking
Cooking
Electrical Engineering
Electrical Engineering
Judaism
Judaism
Languages & Linguistics
Languages & Linguistics
Software Development
Software Development
Mathematics
Mathematics
Christianity
Christianity
Code Golf
Code Golf
Music
Music
Physics
Physics
Linux Systems
Linux Systems
Power Users
Power Users
Tabletop RPGs
Tabletop RPGs
Community Proposals
Community Proposals
tag:snake search within a tag
answers:0 unanswered questions
user:xxxx search by author id
score:0.5 posts with 0.5+ score
"snake oil" exact phrase
votes:4 posts with 4+ votes
created:<1w created < 1 week ago
post_type:xxxx type of post
Search help
Notifications
Mark all as read See all your notifications »
Q&A

Post History

75%
+4 −0
Q&A Standardized way of measuring AC line frequency

In a general sinewave as below, is there a "right" way/"standardized" way to measure line frequency - and how do energy meters calculate that? measuring pulse width of half-period, ie. time elap...

3 answers  ·  posted 6mo ago by 2kind‭  ·  last activity 6mo ago by Pete W‭

Question frequency AC
#2: Post edited by user avatar 2kind‭ · 2024-05-03T19:14:42Z (6 months ago)
  • In a general sinewave as below, is there a "right" way/"standardized" way to measure line frequency - and how do energy meters calculate that?
  • - measuring pulse width of half-period, ie. time elapsed and then doing f=2/T
  • - measuring pulse width of full-period, then f=1/T
  • Is there a need to average and filter?
  • ![sinewave period](https://electrical.codidact.com/uploads/dhj3n3xy3wkvlfmkw5nl36aj5sna)
  • In a general sinewave as below, is there a "right" way/"standardized" way to measure line frequency - and how do energy meters calculate that?
  • - measuring pulse width of half-period, ie. time elapsed and then doing f=2/T
  • - measuring pulse width of full-period, then f=1/T
  • Is there a need to average and filter assuming the reading is being taken with a microcontroller?
  • ![sinewave period](https://electrical.codidact.com/uploads/dhj3n3xy3wkvlfmkw5nl36aj5sna)
#1: Initial revision by user avatar 2kind‭ · 2024-05-03T12:18:24Z (6 months ago)
Standardized way of measuring AC line frequency
In a general sinewave as below, is there a "right" way/"standardized" way to measure line frequency - and how do energy meters calculate that?

- measuring pulse width of half-period, ie. time elapsed and then doing f=2/T
- measuring pulse width of full-period, then f=1/T

Is there a need to average and filter?

![sinewave period](https://electrical.codidact.com/uploads/dhj3n3xy3wkvlfmkw5nl36aj5sna)