Sitting DAQ

Similar Questions

• Simulate signals wired to the DAQ assistant for USB-6009 device

  Hello

  I'm trying to send a signal to the DAQ Assistant Express VI.  I watched the movie "Generating a Signal" on the Web site of NOR (www.ni.com/academic/students/learnlabview/generate.htm) and I have my Signal simulate connected directly on the DAQ Assistant, as shown in this film.  In my case, the DAQ Assistant sends the signal to a device USB-6009.

  However, I received this message:

  Error-200077 occurred to the DAQ Assistant
  Possible reasons:

  Requested value is not supported for this property value. The value of the property may be invalid because it is in conflict with another property.

  Property: SampTimingType
  asked the value: Sample clock
  You select: On-demand

  If I select 'On Demand' in my DAQ assistant and run the vi everything works beautifully.  However, I need my DAQ assistant to be configured to generate a waveform AC continuous, not output a single alternating current rippling.

  What happens here?  I did not have this problem before on other devices of NOR. I am using LABView 2010.

  Please answer.

  Thank you.

  double post

• Hardware DAQ do not appear in LabVIEW measurement IO after loading 2014 DS2, uninstall 2014 DS2 and then reinstalling 2013 DS1.

  Hardware DAQ do not appear in the measures of e/s. I installed LabVIEW worm 2014 DS2 Developer suite and my request is not worked. I then uninstalled ver 2014 DS2 Developer suite and re-installed worm 2014 DS1 Developer suite that installs such as LabVIEW 2013. Now none of the DAQ screws are present in measures of e/s. I uninstalled all the software of NOR and remove this software OR who do not uninstall. LabVIEW worm 2014 DS1 Developer suite installs normally, but I get an "unknown error" when trying to install drivers for data acquisition from the CD and the CD device drivers maintains a loop with a message indicating "currently exectuing License Manager."

  All return to work! I downloaded NIDAQ 9.8 on the site of NOR, and everything back to normal.

• DAQ Assistant does not export the values on the scale

  Hello all-

  Potentially stupid question but here goes: I'm using the DAQ Assistant to read in 4 analog input voltages, continuous sampling acquires data at 10 Hz 1 point, using LabView 12 on a machine with an acquisition of data USB-6341 simulated device (because my office is more comfortable than the lab!). I want to change the first two signals of voltage to temperature and humidity, respectively. I used the «create a new...» "in the 'Custom Scaling' drop-down in the"Voltage configuration"tab for each of these channels, named gave the slope and the intercept at the origin for the respective linear scales and click OK."

  When I test the code - and yet once again, I'm not on a machine with a 'real' DAQ system, I use a simulated device, and it seems that NEITHER MAX generates a sine wave of long period with little noise on top for this - I do not get the results on the scale of my 'signal', I get the raw tension. (If you run my code, I will join, the Relative humidity must be between 0 and 100 and temperature-40 to 60, is not 0 to 5, for example.)

  So, what happens? Is there some flag or setting that I missed? The scaling only works on voltage data 'real' of a 'real' instrument DAQ, instead of a simulation (which is why I mentioned twice!)? I have to do something in NI MAX as well as Labview?

  Thanks for any help you can give.

  John Easton

  Simulations devices will not respond to custom scale.  They are just supposed to allow you to configure your device without errors when you do not have the unit on-site.

  "NOR-DAQmx simulated devices create a noisy sine wave to all the entered analog." Simulated data other set-up is not available at this time. »

  http://www.NI.com/white-paper/3698/en

  They generate a sine with an amplitude equal to half of your specified input range.  If you want to work with simulated data that would be more realistic for your application, you could write a VI to generate the data and have a business structure to manage both "simulations" and "real", then you could switch back depending on whether you have access to the material.

  I just checked this with a PCI-6254 I install and simulated a PCI-6254.

• General DAQ system design

  I'm designing a new data acquisition system.  I just need some advice on how to design a system properly to acquire data accurately without too much exaggeration.

  During the event of 100 ms, we would capture four pressure curves (event unique, non-periodic) and voltage of several spikes (indicator time to specific event).  We would use a charge amplifier to amplify the signal from pressure sensors.

  Can someone point me in the direction of some books useful, tips, rules, basic Web sites, theorems, etc. to design a system for the acquisition of data including but not limited to, the following topics?

  Sampling frequency:

  What criteria should be used to determine the frequency of sampling?  As the waveforms will not periodic, I think not that the Nyquist theorem applies.  Are there any general rules in this case?

  Voltage range / Amplification:

  How much I amplify my signals?  Our specifications define a scheduled pressure, the maximum value, maximum pressure, that the system should handle and tolerances.  How many voltage range must be a signal medium or maximum signal?

  Data bits:

  How can I determine how many bits of data (and the distinct values so) I need to acquire the characteristics of my curves of pressure with accuracy?

  Hi Steven,

  I have a few PowerPoint slides (attached) of the hands on Session of the week DAQ last OR that give an overview of these three specific themes.  They were meant to be more than an auxiliary to the presentation, so they do not have too much information, but the images that seem to be always helpful (there are animations so you will have to go through the slides in presentation mode).

  Sampling frequency:

  It really depends on what you're trying to measure.  You're right that Nyquist frequency applies that periodic signals (you won't have aliasing if the signal is not periodic), but the sampling rate is always very important depending on how much you care to characterize the shape of your signal.

  If the signal changes rapidly, you will want to ensure that you are sampling quickly enough to acquire enough samples along the transition to be able to characterise the dash (if this is important to you).  On the other side of things, if you're sampling too slowly, it would be possible to completely miss a pulse if its duration is less than the period of your sample clock.

  Voltage range / Amplification:

  They are definitely together.  To optimize the resolution of the ADC, you want to choose an amplifier that fills the whole range of ADC.  Many DAQ cards have integrated amplifier and provides several beaches available (although in DAQmx the user specifies just coming available they want).

  Bits of data (aka resolution):

  It doesn't tell you the number of discrete levels available that you can represent the entire range of data acquisition card.  However, this value is different from the precision due to the error of gain/offset, nonlinearities in CDA and noise.  If you are interested to determine the accuracy of your measurements (which is quite common), you should check the specs of the device and look for the specification of absolute accuracy.

  So in general, I think that you need to understand what are the exactly your needs before selecting equipment.  Are what information you trying to determine from your curves of pressure?  Is the digital signals voltage just spikes that must be timestamped?  What this timestamp would be compared to?

  Best regards

• Problem setting Legacy DAQ board using NOR-DAQ 6.1 for Labview

  I know that the Board of Directors is an old legacy product not supported by NEITHER, however for a low-budget project, I have 3 of these AT-MIO-16 x cards and the need to use them.

  I know I got this job in the past not distant os, however, for the life of me can't get things sorted and work.

  You use a NT box, in which this configuration used to work... uninstalled and started fees for other reasons, and I can not get the NOR-DAQ 6.1 to support LAbview 6.1 or 7.1.

  Of course, I understand the OR-DAQ 6.1 should be used for Labview 5 and older, but also know this has been successfully done in the past.

  I downloaded all knowledge base articles dozed or both support and remember to use successfully the last time that I set up so I know not somehow it works.

  My configuration is: AT-MIO-16 X to the bus combo board (called work)

  NT PC

  LabVIEW 6.1 or 7.1

  NOR-DAQ 6.1 is the most recent to support this card.

  However, it will not install its support to its latest versions of Labview and I get errors, crashing, or missing files, when I followed various circumvention of knowledge base solutions.

  I was hoping that someone has a documentation somewhere how to handle this, because it really is a matrix of spaghetti.

  I can get NOR-DAQ support files installed, and Configuration Manager works well, finds the map and allows its parameters to be defined.

  But when I load the DAQ vi of any type, Labview accidents and the wizard of data acquisition channel does not work at all (no error).

  Thank you

  Yes, the installation program from the folder of disks for NOR-DAQ 6.1 on the ftp site has worked well.

  Workaround. Thank you

• DAQ Assistant do not find channels of the cDAQ

  We recently bought the Compact DAQ and two thermocouple modules 16 channels.  I am trying to change a code to use a Pico USB logger for the cDAQ and I'm trying to follow the examples found on your Web site using the DAQ Assistant.  Initializes the DAQ Assistant, and I choose analog input for the selection of Signal acquisition.  When I select the option of Thermocouple temperature section, it says "reading of Lecture de Configuration Configuration of the system, please wait...". "but it never picks the cDAQ channels.  I installed drivers and recoginizes of the USB port on the device (and the light indicates that it is in "ready" mode), but it has never been "Reading System Configuration."

  Thank you for your time.

  Solution has been found.  It turns out that the data folder was corrupted files it contains.  Once that I deleted it MAX started to work very well.

• order a fan with USB6251 and the Daq signal accessory

  Hello

  I have a school using Labview project and the USB6251 connected to the Daq signal accessory card.

  The Labview program must read continuous temperature (Ia 4 channel, internally) temperature probe connected to the accessory of Daq Board signals. When the temperature reaches an established value, then a led on the front panel should be lit and a singal output data acquisition should start a fan connected to the acquisition of data which cools down the sensor, then stops.

  Would it not be possible to do something like that? Even if I generate a square signal and the fan only works on the State of the signal. The fan requires at least 120 mV DC current. I'm afraid that if I take these courses for the acquisition of data, I could damage the unit.

  Thank you.

  I guess you mean 120 current my DC . If you look at your spec of daq card, you will find that the current max are far below 120 my. This applies to the two analog out and digital out. Take a look at this site, it may be useful to some. site nice http://www.me.umn.edu/courses/me2011/robot/TechNotes/motorcontrol/motorcontrol.html . If you want the speed controller, you have two options PWM or voltage of the motor regulation.

  Good luck

• Module correct DAQ for Celesco SP2 or SP3 String Pots

  Hello! I am currently looking to develop the capacities of our laboratory by adding string pots in our toolkit of sensor. I came across a jar of string that will work for us, namely Celesco SP2 or SP3 (or the other). Here is the site where there are listed more information on these sensors:

  http://www.celesco.com/stringpots/

  SP2 is a divisor of output voltage. According to the Application engineer, a very clean DC voltage signal be sent to the pot of string SP2 so that it can generate specific measures, while the SP3 will take 24 V DC (less clean signal) sign and generate specific measures making the more expensive than SP2 SP3. (prefer to go with the best value option).

  We currently have a cDAQ-9178 chassis. Is there an analog input module OR out there that will work with the pot of string SP2 or SP3. The hope is that this module will be connected to the cDAQ chassis and the sons of the string pot turn for this add-on.

  It would be also possible to use a USB-6003 with pots of string above? Let me know and thanks for your help! I am also attaching the respective data sheets for your reference.

  Since available SP3 device accuracy is 1% of full scale (0.1 Volts), I think you can use any of these materials good markets (USB-6002 or (3). You also need to consider what kind of sampling rate you need. I imagine not too high (perhaps 10 or 100 Hz is just enough)? Depends on the speed of movement you want to check with this pot spring...?

  If you use the USB-6002, you get 4 differential channels and a 50 kHz sampling rate (but don't forget not, if you for example use 2 channels, your max rate will be half: 25 kHz per channel). 16-bit ADC, so that you get the resolution of the 10/2 ^ 16 = 0.15 mVolts the interval 0-10 Volts (0.0015% 10 volts). It is already an overdose compared to unit 1% F.S. accuracy.

  Wiring: read the 2nd page of your pdf. You have three sons. Connect the Red (+ 24V) and black (com or the PSU GND) wire to your power supply (24VDC, like you said, use a quality like Siemens brand). You can use a single 24V DC power supply to power both of your sensors (I don't know how much power they attract, but I guess not a lot), obviously connect the power supply to the two parallel electrical sensors (so that they get the same voltage).

  Connect the Green (signal 0-10 Volts of tension) and black wire your DAQ hardware (use differential pins, check the specs of the device).

• Code DAQ Express reports difficult DT

  All,

  I have a strange problem where some code DAQ Express reports systematically bad DT. This occurs with peripheral equipment and a simulated device. I've attached screenshots detailing everything that I found relevant to the problem as well as the source code.

  You can download the files here.

  http://sites.Google.com/site/xkenneth/downloads

  Kind regards

  Ken

  Hi Ken,

  Please post on the Forums of Discussion OR! Your photos, I see you use a NOR-9239. On page 16 of the NOR-9239 Operating Instruction and specifications, he explains that the valid sampling rates from the time base by dividing this value by 256. Then, the value can be divided down by an integer between 1-31. Thus, valid high sampling frequency may be as high as 50 kech. / s up to 1,613 kech. / s when using the 12.8 MHz internal time base.

  In your case, you specify a sampling frequency of 300 s/s, which is much less than the lowest possible rate of 1,613 kech. / s. Therefore, the Board of Directors is forcing this value up to 1,613 kech. / s and the reverse of this is the value of dt you see, which is 0,00062 seconds. To get real sampling rate less than this value, you will need to provide an external clock. For example, to achieve a 300 s/s clock frequency, you must provide an external clock to a multiple integer of 76.8 kHz (up to 2,3808 MHz).

  Also, thank you for adding attachments to your message. This gives other users a easier access to information for both provide support and also to be able to view all relevant information during the exploration of the post in the future (in case where someone else runs into the same type of problem). Anyway, thanks again for the post and all the details of your problem! See you soon,.

• You place your order on the Apple Site

  I ordered a 7 IPhone September 21, as it was very
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  at that time. Today, 7 October, I see that the IPhone is available to any
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  probably need another 7 days to be delivered to me! Now, I want to only disclose my
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  otherwise it's not really a reason to buy
  an article on the Web Site!

  And this is the last time I'll do so!

  Thank you!

  Greetings from Rome

  !

  Don't know what your question on the iTunes Store, but you already know that you talk only to other users on these forums and that Apple are not here - if you want to contact Apple using the 'contact us' link at the bottom right of each page here.

• I tried to download macOS Sierra for the last hours on my Mac, but it is still holding still to download. Should I download the El Capitan instead? All sites tell me that I should update my Safari.

  I tried to download macOS Sierra on my macbook pro iOS 10 for a few hours and it still has several hours to go. Should I just download the Capitan instead? All sites tell me that I should update my Safari or I wouldn't even through this disorder.

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  I lost my iWeb domain, is there a way to access my site and download it?

  Kind regards

  Paul

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  If you have lost your domain.sites files that iWeb uses, then you will need to re - build your Web site from scratch, but as iWeb is not taken in charge and for the past 4 years, I would re-build your site with another application that it is actively updated.

  Take a look at EverWeb here.

• "Sit less, move more.

  The new IOS 10.0.2 has modified the application of health by adding a video called "sit less, move more" section of health data. Although I agree with the feeling and I'm even happy to be preached about this TIME, he began to grate. Can I remove or ignore?

  Do not watch the video.  Scroll the screen to see your activity data.

• iOS Safari 10 appear frequently visited sites

  I had a problem with Safari in iOS 10 always ask permission to use my position whenever I do a google search. The search for a solution to this problem here in the support forums led to my safari of compensation of all historical data and web site.  This seems to have solved the problem of google, but now do frequently visited sites present when I click on the address bar, even if they are enabled in the settings.  I know that it can take a while for the browser to determine what the a frequently visited sites are, but that's now more than three weeks of daily browsing and they do not always show.  Any ideas?

  Hello. I guess you are not private browsing (black bar at the top). That would disable all memory.