Martin Posted August 28, 2018 Share Posted August 28, 2018 Hello Forum... We wish to be able to measure the time a current is flowing over each of 4 channels. It may be for a fraction of a second or several seconds (maybe up to a minute). We have two Labjack T7's and each currently monitors 4 experimental reactors Our logging frequency for our experimental workbench is currently by the second and is something we want to maintain. What we need to know is what is the duration of current "ON" for each second. The frequency of current pulse is random. A channel may pulse a fraction of a second or indeed may remain "ON" for a number of seconds, therefore no rising or falling edges, just a constant high for the duration of several logging cycles (see attached graph). I understand that if there are no rising (or falling edges) then the data will read as "0" which will be totally wrong for our purpose... or am I reading this wrong? Is "Duty Cycle" using a rising edge the thing I should be looking for or should I be looking to count the number of pulses a signal is "HIGH". The "HIGH" being provided by our Hall Effect current sensor? The current is a regulated 7.5 Amps... it does not vary except in terms of the time that is is on. I made up a simple Excel chart to illustrate what we are looking at. Any guidance would be appreciated. Regards, Martin Quote Link to comment Share on other sites More sharing options...
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.