SCOPE NI Y waveform versus time

Similar Questions

• Find the area between the axe of waveform and time

  Hello.

  I have acquired a signal to 1ms rate. I recorded in a .lvm file, and now I want to calculate the area between the axe of waveform and time. So, it's a classic integral.

  So, I create a .vi separated with a module for reading measurement, but I don't know which is the right module of integration, in this case. I tried all the modules to integrate to find the area, but no good result.

  PS: I also want to display this area, hasurate, somehow, but it's secondary.

  Any idea?

  For the first part, we should look at your code and data.

  The second use the "Fill" option available for the plot which will fill in the specify box.

  Ben

• Updated reading (waverunner 6100) scope of the waveforms?

  I use an oscilloscope (LeCroy) waverunner 6100 and able to get the waveforms of the via drivers downloaded from NI.com. But I would get a waveform only when a new acquisition happens (not not to read the same waveform all the time). How can I do? There is a "read only waveform.vi" available on the site, but it does not work with AUTO trigger mode (I think). I am currently reading in waveforms while loop with "Fetch waveform.vi", but I'm not sure that it reads as "refreshed" display... Here I read some registers (whatever) status or there is already an existing solution?

  Hello Alex Harley,

  Alan LeCroy Tech Support here.  The waveform read various screw run the command 'Arms', so it is not for use in Normal or automatic trigger mode. We recommend that you use this command, because it uses the unique relaxation mode, which is the mode to use when you want your program to control when the scope triggers and so make sure that you're reading data retrospectives that corresponds to a specific triggering event.

  If you prefer to run in automatic mode or Normal mode, you must use the VI 'Wait to acquire full' which is located in
  the range of data/Low Level function.  The looks for the registry "INR" testify to a new acquisition.

  Best regards

  Alan

• Table of waveform in time real Multi ground

  Hello

  I've attached a picture showing part of my code. What I'm trying to do is to create the exact waveform as "Cell pressure (kPa)", but in the x-axis in real-time. I created the "wave form" and that it does not work enough. This table will 'Y' to 'build the waveform"will contain 8 items and when I run the program,"Waveform"shows all the elements in a plot rather than in 8 different locations in a single diagram.

  Can someone choose where I am doing wrong?

  Thank you

  Hoda

  Hoda wrote:

  Table of waveform isn't the time component. I need to show all plots on a graph and real-time

  As you convert scalar data to a cluster to the chart, he has no information indicating the time.  Missing time initial T0 and the dT for the time interval.

  Outside your wire loop right now for the Xscale.Offset property for the graph node.  Because your loop time is 1 second, you must set the DT.  But if it was something else, you must set the XScale.Multiplier property as well.

  

• Getting the scopes to update in real time...

  So, I know that I can put the program monitor scopes, but then I lose the program.   I know I can fix the monitor to the scopes and quit the program in the program monitor, but then the staves don't update in real time.  Arrgghh!

  Any way to do it, or is it yet another feature request number...?  I used all the time in FCP and it's a bit lame, do not have.

  .. is this yet another feature request issue...?

  Yes.

• Reset relative time of graphic waveform

  Hi all

  I created a table of wavefrom which starts from a relative time of 00:00:00 at the start of the vi and visualize that the waveform versus time since the start of the vi.

  I made this using an example that I found in the forums or by subtracting right now relative to the relative time of the waveform, as shown in the attached diagram

  When I stop the vi and start it again normally it starts from scratch and so on.

  the problem I want to the table in order to start from scratch each amount fixed time (ex: 50 seconds) and does not need to stop the vi and restart it in order to start from scratch back!

  I thought a lot about how proceed for many and I tried many things but I could not, have an idea on how to do?

  I feel that the solution will be simple to many people, but please forgive me coz I'm new to labview and its my first project with her

  Thanks in advance,

  Concerning

  Shady

  shadyman says:

  Ben

  First of all thanks a lot for your answer.

  I just that explain how can I replace this tunnel with a shift register, where the sr will be data, coz the 'Get current date and time' is in fact placed out of the loop, also how I can change this value to a structure of housing, I'll put the 'get date and time' in a loop or in a business structure? coz I actually tried in ways that looks like that, but it did not work.

  I would appreciate a lot if you showed me what you mean by a schema or on the actuall vi that I fixed to the Terminal.

  Thanks in advance

  Concerning

  Shady

  I reserve this type of service to my paying customers.

  I would turn around and invite YOU to post a picture of what you have tried and let us comment based on your efforts.

  I'll help you get started with two suugestions and a question.

  (1) you can click the tunnel entry and select 'replace with shift register.

  (2) If you look at your code in execution, highlighting mode, you can see data comes and goes when.

  Now for your question!

  After I look at the code to run where it will take another "Get time" node should be located to obtain a new value, WHILE the loop is running?

  As I said, post advise images of what you're trying to do and offer us on this basis.

  Ben

• waveform, with an average of results using labview to O-scope

  Hello fellow engineers! I'm a first-yeargraduatestudent in CHEE at the University of Houston. Basically, I know nothing about labview. I am trying to program an application that looks like this - I collect a waveform of the signal of O-scope. This waveform does not change its characteristic shape. I need to find the wave form average of waveforms of N (100 for example). Thus, the slight changes (or noise) in the feature of form during the period mustbeaveraged out and I need to have a resultant waveform that represents the average waveform over a period. So, basically, I'm collecting the wave several times (for example 100) on a single period. The O-scope that I use now is Tektronix TDS 2024 B. It communicates with the computer via USB. The version of labview is 8.5. For now, I am able to communicate with the computer using our o-scope through labview. I already downloaded the driver of instruments of your Web site. It turns out that the program can give me only the average result I can get directly from o-scope manually. I need to have more say on average (100) using labview. I wrote a program that relies on the instrument driver that is downloaded on your website (for loop part is average, the waveform). The program that I modified and an instrument driver are attached. The program cannot be fully open, if the driver is not put in the right place in the labview (under lib inst.) When I run the program, the average waveform does not appear on the front panal and signal waveform file is not saved correctly. Is there someone can find where I did wrong and it develop for me? Because I barely know Labview, it will be even better if you can add an image or program that you have changed. I'm waiting for your creative ideas.
   
  With the best regards,.
  --
  Weiye

  
  

• Waveform output n-times with DAQmx screws

  Hello

  I want to output to an analog waveform 1 d a specified number of times.

  The problem is that I am converting a Labview 7.1 to 9 Labview program.  To do this, the Legacy DAQ screws must be replaced with modern versions of DAQmx.

  The old 'AO Start' VI allowed the user over the "number of iterations of the buffer" and it would simply exit the waveform given that several times.

  There seems to be no way to do this with the new DAQmx screws?

  Other people have said:

  "To produce an n-time waveform, simply call the VI"DAQmx Start Task"that many times."

  This won't work, as long as the task is stopped before trying again - HOWEVER, this is not the service I need for the following reason:

  -There is a delay between the end of the output waveform and the beginning of the next iteration of this waveform, in the order of 15 ms.  It is unacceptable, there should be no delay.

  "A form of continuous output, just wave wire wish all waveform to the 'DAQmx write" VI".

  It is also unacceptable that I went out on four-lane 1 MHz, with iterations of waveform more than 100.

  Does anyone know how to produce a waveform of 1 d n-times without the problems mentioned above?

  Thanks in advance,

  Chris.

  Hi Chris,

  The best way to get the functionality that you are looking for must first consider the size of your waveform.  Let's say for example it is 1000 samples.  If you want to generate this amount of waveform a N cycles, should perform a simple calculation to take the size of waveform table times the number of iterations, and set up a finished task of output to the output as many samples.  So let say we want to exit 20 cycles of our sample of 1,000 signals, we would put up a VI of Timing DAQmx for finite samples, and samples per channel at the output of the task must be 20,000 samples.  Thus, you generate continuous 20 cycles of your waveform before going out and turning off the task.

  We will find a good example of base from here, make over, change the waveform to VI to your real table and set the terminal of samples per channel to the amount calculated in the way I did above.

• How can I trace data to a table 2d one at a time on the same waveform graph

  Hello. everyone. I have two readings of the sensor build in a 2d array. I would draw as bar on the same waveform each time that each sensor reading is display as a bar on the graph.the problem is that I don't really know how to access each given at the time and sent each sensor reading on the 2d of waveform.the table is actually a two monofores rwo/100 100 representative reading of each sensor every 1 sec.

  
  

• Chart based on the irregular time

  Hi, I'm continually acquire voltage with a compaqdaq. I want to do is chart as the voltage (Y) versus time (X). The problem I have is that the time between measurements is not constant, so I can't put a time constant to rate and graph XY or equivalent. So, how can I chart the values of voltage with the X in time?

  Thanks in advance.

  You can always move a waveform (with a single point) to the table and it will show the irregular points.  Use Waveform build with updated t0 at the present time and Y a table of a point (present value).  That said, I generally don't like graphics and roll my own with the XY graph like others around here.

• NI9225 waveform measurement of network 230VAC

  Hi all

  I measure the waveform complete (time of the voltage signal) the local power grid with a voltage of 230V L1 - N with a NI9225 module.
  Peak values (RMS) 230VAC * 1 414 = 325V pic.

  I can't to scale greater than + 300V M.A.X parameters entered.

  In the statement indicates that the module can measure 240V electric networks.

  Can directly measure the shape of wave or shoul, I use a 01:10 for measures voltage divider?

  Thanks in advance

  Regards Christof

  Text of the Manual:

  The NI 9225 300 module input analog Vrms C Series has been designed for the waveform of signals measures high voltage. The Vrms 300 range allows line-neutral as a line of measures of electrical of 110 V and grids of the 240 line-neutral networks V. Three NI 9225 channels make the ideal module for a three-phase system. Measures voltage waveform are required to follow events like sag, swell, transient power quality and harmonics. Combine the 9225 OR with the NI 9239 (10 V) and a current transducer to create customizable power quality monitor or a power measurement system.

  Die Skalierung as AC measurement wenn ich die richtig Spec understand habe ist.

  BIS + / 425VDC ist der range sogar in der Spec angegeben.

  Also im bereich messen und deine Wfrms bekommst 300V 240VAC mit schönen Sinus...

  No vote was now a screw also as Poweranalyse Schön mitkommt, aber your über etwa 15 Perioden so sicher detection...

  10:1 Tastkopf kann nicht schaden, if abgeglichen.

  Offenbach... VDE?

• How to get the length of a waveform above a certain threshold?

  A simple problem... I have acquire the data of the DAQ Assistant and read it back draw the measures file using read.

  My signal will be with just a peak (see figure)

  I need to find the duration for which my wave form value is more than 150.

  I am unable to find that the waveform of time first crosses threshold... but the second point waveform the threshold comes in... I'm not able to find

  second attachment is part of the created vi...

  If I can find the second time where the wave goes the threshold, I can calculate the time using dt...

  As David and VSH have hinted at, you can use threshold spikes.  I did it several times...  See the attached VI.

• stationary graphic grid of waveform

  Hello

  I want to draw a mobile graphic waveform and the background grid must be stationary. I got graphic Wescott, as well as the grid. But while the graph is moving the grid moves also. could someone suggest me how do a grid fixed as a backdrop in the displacement of waveform.

  Thanks in advance

  A waveform graph shows the historical value of a waveform with time, so brands relevant grid must move with data waveform having no relevance, think of it as an old recorder paper. If what you're trying to look more like an oscilloscope, then the correct display would be a waveform graph.

• generate waveforms

  Hi all

  How can you generate waveforms with time and amplitude? where you mention amplitude step size and grandeur of no time.

  Thank you

  This strangely similar to work at home.

  You try to build a specific type like a sine or triangle wave?

  Where are you stuck?

  I recommend you watch the LabVIEW tutorials online
  LabVIEW Introduction course - 3 hours
  LabVIEW Introduction course - 6 hours

• Why did I fail discover "All scopes" in monitor calibration?

  There is no 'all scopes""Vector field""Waveform YC"or parades in my reference monitor setting. What happened to my first pro?

  They are now under Lumetri in the view menu.