Signal acquisition of voltage AC using NI 9206 9205 and cRIO

Similar Questions

• Acquisition of the voltage with the NI 9206 module

  Hello

  I use a module NI 9206 with a CRIO-9081 to get 14 acquisition of voltage from 0.4V to 5.8V using the mode of CSR.

  Then I plug the 14 to the module of the AI0 of entry I 15. When I connect the first 12 pins, I get the good acquisition but when I connect the two last pole, the tension of the first two (pin AI0 and AI8) traditionally of 0.4V and that's what I don't understand.

  I tried to remove the two first entry, but then the two following voltage increase of 0.4V.

  That's why I wonder if I forgot something, why the first entry increase and if someone already has mett something similar.

  Tahnk you

  Sounds like you see a form of ghost for me.

• NEITHER USB 6008 voltage offset using CSR and measurement of diff.

  Hi all

  I am currently trying the NI USB 6008 housing and I'm getting problems when reading voltage analog using CSR or differential.

  So basically, what I want to measure is a PWM signal (0 to 12V), which is divided by a divisor of tension (by two). But instead of measured 0V and 6V

  I am in a position a constant 0.8V and approximately 3V.

  On the side of digital data acquisition, I give you on impulses for the SSR... and it works fine.

  I connect it that way: http://digital.ni.com/public.nsf/allkb/95CC0CB11D7DF3D18625712E000C4ABD?OpenDocument

  Would apreciate any help

  Best regards

  EDIT: Attached graphics acquired are

  What is the impedance of your voltage divider?  The input of the USB-6008 impedance is not very high. If the impedance of the partition is large, it could cause the effect you see.

  Lynn

• NOR-USB 9229: How audio signal acquisition?

  Hello

  It's one of those stupid beginner questions I use a module OR 9229 USB to capture the audio output of my computer line as follows:

  -left line-out goes to AI0 +.

  -right line output goes to AI1 +.

  -land line out of is divided into two and goes to AI0 - and AI1 -.

  What is the correct way of wiring?

  In case it is, I have (I think) have problems audio signal acquisition. In the Measurement & Automation Explore, I creates a task for the acquisition of voltage AI0 (44100 Hz, etc.) -nothing is displayed on the graph when I run the task! (I have music running on the computer during the measurement) Otherwise, the 9229 flashes green, seems to be ok, auto test work, etc..

  Someone has an idea what I am doing wrong?

  Thank you!

  Hi acgrama,

  That sounds like it should give you a signal any (not an empty graph or a flat line at 0 V), but the USB-9229 is not very suitable for audio:

  • The USB-9229 to entry level is of +/-60 V. A line level audio signal will use a small fraction of that. Of the USB-9229 precision and plug noise are adequate for your application?
  • The USB-9229 can't acquire them exactly 44.1 kech. / s. It supports some 50 kech sampling frequencies. / s divided by a number between 1 and 31, as 50 kech. / s, 25 kech. / s, 16.7 kech. / s and so on. When you specify a sampling clock DAQmx not taking in charge, he is forced to the top supported next, which in this case is 50 kech. / s. (you can read back the SampClk.Rate property to see what DAQmx forced the rate to.) For 44.1 kHz audio to USB-9229, you will need to re - sample the acquired data (which are specific to the programming environment).

  Assuming that you're just trying to do it for learning or experimentation, here are a few ideas:

  • Is the line connector configured as an output line? Many mothers today have reassignables audio connectors.
  • The volume of the source (wave, CD, whatever) high enough?
  • On the graph, is scaling auto turned on? If you display data in a table instead, are the numbers exactly 0 or any close?
  • The output of the line works if you are connecting to another device that is designed to handle signals to line level?
  • If you connect a battery (AA, 9V, whatever) for the USB-9229 instead, read the Max supply voltage?

  Brad

• acquire and graph of a voltage using LABVIEW 8.6 and DAQ 6020

  I recently installed Labview 8.6 on XP based computer and my device is 6020 DAQ. I installed the driver 7.4.4 to my DAQ 6020.

  This is my first attempt to write a labview on this configuration code, and my request is very simple.

  I want to measure a voltage at the analog input channel "Ach0" and this chart. The voltage must be sampled all 1millisec.

  I used a code that I found on google image search to do this, but I had got stuck at the point where I have to select channels using the DAQ assistant. The wizard DAQ says "no device supported found.

  In MAX, however my 6020 DAQ is present as device 1 and I can view tensions properly he is using "ach0" data acquisition channel 6020.

  The code is attached below. I use 'the edification of a voltmeter' to the page 11 of the attached pdf file.

  I searched the archives of this discussion forum, there is a code for graph 2 tension, unfortunately I couldn't find the code for my application. So I am writing from scratch.

  Please help me get the strings recognized by the DAQ assistant.

  Concerning

  Poli

  According to another post of yours, that you have really a DAQPad 6020 and it's an important distinction. If you had the pci version, I think you could install DAQmx and use the DAQ Assistant. As you said, you can use the traditional pilot and in fact it is what you have installed. The pdf file you fixed clearly mention using DAQmx so information on the functions of data acquisition are not related.

  I don't know if traditional DAQ examples still install, but if they are not, you will need to watch features on IO action > Data Acquisition > analog input palette. A good one is to start by HAVE acquire the waveform. A chart of output waveform and put everything inside a while loop wire.

• How to view analog channels during an ongoing acquisition, what type of used wave form, table, or chart?

  I use Labview 8.5. and the NI USB-6210 device.

  I want to display the analog channels over the continuous acquisition.

  I can use the table of waveform or waveform graph. Waveform allows you to eat a history buffer. This function is very interresting and useful for my system, but I can't change this value to programming (if I do not mistake!). So, I was wondering if I can also use the waveform graph, but I do not have how to make a circular buffer to replace function "history buffer. I have to use the waveform as a data type.

  What is the best solution for my problem? I would like to know if my solution is good (graphic use of waveform) and if anyone has a solution to make an effective circular buffer with the waveform data type?

  Thanks in advance, best regards, Daniel

  There is an example that comes with LabVIEW called "XY table". It shows you how to create a history for a XY Chart buffer. The size of the history can be changed on the fly. You can adapt the VI "graphic buffer XY ' to work with a data type of waveform." This type of data consists of 3 elements: start on time, delta t and table of values. The only thing that you should be buffering is the array of values.

• How to use NI 9264 and NI 9205 with NI PXI-7813R and cRIO-9151

  Hello world

  I am currently working on an application in time real NI PXI-7813R (map FPGA) and NI PXI-8184 (on-board controller). They are all in an NI PXI-1031 chassis.

  I need to generate/receive analog signals.

  I already managed to use the SCB-68 with my NI PXI-7813R (FPGA card) to process digital signals. (Slot 0)

  Connector 1 and 3 of my FPGA I have respectively cRIO-9151 with NI 9264 for analog and cRIO-9151 output with NI 9205 for the analog input.

  • with NI 9264, I have on every 16 outputs-10, 5V (!) Isn't it supposed to be between-10 and 10V?), whether or not the vi runs. (But not when my PXI turned...)
  • with the NI 9205 module, I always get-32767 when the VI is running, regardless of pressure I apply. (I tested AI0 and AL10)

  Maybe is my hardware not configured properly? I did the configuration automatically, when I started the project, Labview detected the devices connected.

  Unfortunately, MAX does not seem to be useful because inputs and outputs are on the FPGA...

  Any idea?

  Thank you

  PS: VI on the FPGA is really basic, only read/write controls.

  Hello

  Back with the solution...

  My modules came! Each of them has been plugged in the wrong cRIO-9151.

  This must occur after the first configuration.

  I noticed when I right click on my fpga device > RIO Device Setup. I wanted to check the devices again, but crashed for Labview.

  I could also have seen 'Connector [number]' (automatically added by Labview) and the removal of material number (9205 or 9264) in the project and check if it really was what I had.

  Hope that my mistake will help someone in the future...

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