Measurement of voltage of bus DC-OR-9505

Similar Questions

• Measure the voltage and the temperature simultaneously with PCI-6281

  Measure the voltage and the temperature at the same time at the same time. However, when I put the voltage and temperature in a loop, the acquisition of voltage is significantly delayed. When I put the voltage and temperature in two different loop, none of them works.  There is an example in aid of Labview as shown. This structure works fairly quickly? In addition, how a volgate get and temperature Analog DBL 1Chan 1Samp? I check the exported excel, the first column is 0, 1 the second column contains the value of the voltage, temperature value. I wonder how can I get these two values for each scan.

  ,

  Assuming that the DAQ cards can handle it, you can set an analog trigger for the channel of the tension.  Then you just X samples to get your 100us data value.  Keep the last sample.

• Measure the voltage of strain gauge

  I have connected my 9237 to a 9945. I use a 350 ohm strain gauge. I have the voltage set to 2, 5V Max is there a way to measure physically to be sure that it is 2.5V? Also, in my vi I use a DAQmx create function of the channel. I want to add another channel for this but can't see how to do it.

  Thank you

  HS

  Hi, Harry, it's Paul with engineering Applications to the OR.

  My first question is why you are wanting to physically measure the voltage?

  If you are wondering how that tension may vary, it is limited by the maximum capacity of 150mW of your device, as explained here: http://digital.ni.com/public.nsf/allkb/7CBC67482CC9FB318625758C0048FF73?OpenDocument

  If you want to continue to measure externally, you have a few options.  You can use another DAQ hardware to measure the voltage, or you can use another external device, like a digital multimeter.

  If you want to see in the excitement that is actually supplied LabVIEW code, you can use the node property DAQmx 'Value of real excitement'.

  As far as playback of multiple channels, theres two ways you can go about it.  If your channels are sequential and all have the same settings, then you can change your name of the physical channel to something like 'Dev1/ai0' to ' Dev1 / ai0:3: to specify the first 4 channels.»  Alternatively, if you wanted to select non sequential channels, you can chain create channel set tasks, as long as they are of the same type of task (AI voltage, etc.) and the same device, as shown below.

  

  Let us know if you have any other questions.

  Kind regards

  Paul

• Complete noob - would like to measure the voltage to manual start and stop

  Hello

  As the topic says I'm a complete noob when it comes to programming OR.

  I'm looking for someone to point me in the right direction

  Installation program:

  Windows8 office

  Visual Studio 2013

  NI 6255 PCI data acquisition card

  Block connection OR SCB-68

  What I want to do:

  I want to write a console application to measure the voltage on the signal ai16

  -I want to be able to start and stop the application manually

  -I want to be able to pressure measured in a CSV output.

  Where I am:

  I compiled and ran the example "NOR-DAQ\Examples\DAQmx ANSI C\Analog In\Measure voltage.

  It is said that I have "collected" samples but I don't know what that means, as I do not see an output file...

  What I don't understand:

  Samples - I do not understand cela or know even where to start

  How can output file - I get the file to save the collected data.

  Thanks in advance

  Chad

  Hi Arron

  Thanks for the link, unfortunately, it has not helped because the instructions were for Visual Basic and C++ not. It was my fault for not putting the language of prog that I need help in my original post.

  However, I started to find help on this link: http://www.ni.com/tutorial/5409/en/

  -With the help of NOR-DAQmx in text based programming environments

• measurement of voltage longer distant

  Hello Forum,

  I have a very important question. I want to measure the voltage difference between two locations on a surface which are location 100 meters. So I'm going to use long cables. The sensors are reference electrodes. What connection mode will be the best for this measure? Single Ended (one of the references in the ground), which is the difference?

  Any ideas will be greatly appreciated and kudo'ed

  Hello

  I'm not familiar with the reference electrodes, but I think I'd go with a differential configuration for your application because of the length of the cable (I'm guessing 2x50m or more?). Here is a tutorial about voltage measures: http://zone.ni.com/devzone/cda/tut/p/id/7113 I hope that you will find some ideas on it.

  The problem is that any current through long threads will cause a voltage drop noticeable across the cable leading to the precision of the measurements. It is further complicated by different loops of Earth created between the ground potentials.

  Best regards

  Matej

• How to measure high voltage (60-70 v) and current (75-80 a) using a DAQ PCI or USB DAQ

  Hello

  I work with a system that works on about 5kW. The output of the system voltage can go maximum up to 60-70 v and thus the corresponding current around 75-80 a. I have 10 these systems that I want to read one by one continuously for long periods.

  I am designing the automated system best suited for this and looking for the best material that would be appropriate for this purpose. Looking for options, I found that an SCC - A10 attenuator may be used to get the tension down by a factor of 10. But I'm confused, if the high current will pose a problem and also how to measure this high current.

  I need to measure the voltage and current at the same time. Please suggest what would be the most appropriate fitting for the same (preferably PCI or USB)

  The hope of a quick response. Thanks and greetings

  Reena Sharma

  Facilitated learning

  Reena says:

  Hi all

  There is good news that the idea of using a compact data acquisition has been accepted by the authorities of the society. I'll be very grateful, if you could suggest me with some hardware modules suitable for my application and how I can use them best.

  Thank you very much

  Reena

  I was able to make a few suggestions, but do not have the time to understand your needs and the forums are not the best solution.

  Your Local OR representitive actully gets paid to do this kind of thing.  a google search suggests THAT LME is in Pasadena. Zack Collins would be the contact rep

• Measurement of voltage detection failure

  Hello everyone

  I am a new user of Labview and I try to measure a voltage but is facing difficulties.

  I use:

  Worm - Labview 8.0 on Windows XP

  -Based electric circuit with a voltage generator and resistor for voltage

  -A connection block 68 CBS

  -A NI PXI 1042 chassis

  But Labview seems unable to detect my acquisition circuit, I tried to use the DAQ assistant > analog input > tension in my new VI, but it has not detected any device.

  I miss any point?

  Any help would be welcome, if my explanations are not clear enough, you can ask me some questions.

  Thank you for reading my post.

  DAQ Assistant materials should not be your FPGA.  Looking at different sets of drivers.

  I expect to see the device in your PXI system, if Max.

  To work with this device, you do not add the DAQmx code in your code and go from there.  You will never get a reading.  Instead, you add a target to your project.  You have a controller in a PXI chassis or are you plugging it directly into your PC?  If you have a controller, it is based on WIndows or RT?  If it is Windows, you'll want to work from the PXI himself.  If it's a RT., you should be able to see all of a remote connection.  If it is not a controller, try to turn off your PC and PXI.  The PXI power first and then the PC.  You read only what is PXI chassis when you start your computer.  If you have added anything to it, you will not see it.

  I don't remember off the top of my head.  But, I believe you'll right click on 'My Computer' in your project to see the map of the R series.  Choose "New objectives" and search for your listing.  If it is not there, right click on the project name instead.

  For this device, ignore the DAQmx palette entirely.  It is useless to you.

• Measure the voltage and the temperature at the same time with a single card PCI 6014 DAQ?

  Hello guys,.

  I'm doing a charger measuring the voltage of the battery, the charge current and the temperature of the battery using a 6014 cardboard...

  I want to use my PCI6014 DAQ card to measure 2-channel analog voltage input and 1 temperature Channel Analog input using thermocouple type k measurement of voltage or temperature isolation is OK, but I can't understand how to measure the voltage and the temperature at the same time... I want to use input differential...

  Thank you in advance, all the tips

  YSL

  Create a task and add channels to the task, as follows:

  

  Christian

• differential measurement high voltage

  Not sure if this is the best place, but here goes.

  We are trying to measure a voltage differential across a shunt in offset voltage, which is then further +/-10V over data acquisition cards measure. Here's a representative diagram of our circuit:

  

  We must also measure 24 of these shunts while we move the motor one way or the other. That in one case the offset voltage is near current of 12 volts (rank 9-16Vcc) that eliminates all the cards of the cDAQ and it looks like the PXI series too. We currently use one SCXI-1104 researcher but a USB port on a laptop for this measure. The SCXI-1104 has a voltage range of + / 60V and I was unable to find anything close to that in the product offerings of NOR. The reason why this is going to be a problem for us is that large corporation, we are forced to move to windows 7-64 bit and SCXI hardware are not supported for this operating system.

  I am open to any suggestions that others may have to help us fix this problem.

  Thank you

  Bill Lane

  We ended up finding some amplifiers that have been specifically designed for the high pressure shunts.  Do a search on digikey for amplifier of high-side current shunt and you should be able to find something.  These will turn the measure into a single measure is over voltage.

• Measurement of voltage deferred with a start from a pulse TTL (PCI-6251, OR DAQmx)

  Hello

  What I do: gain a measure of tension after a certain period of time (order of microseconds) when we observe a TTL pulse, lasting about 1-100 microseconds. What are the options I to do thins?

  PS. If this problem is solved in a C code example, please point me to the right direction. I saw examples of NOR-DAQmx, but not a not spot something like this.

  Hi hum-human resources management.

  The example of DAQmx ANSI C Analog In\Measure Voltage\Cont Acq - Ext Clk - Dig start shows how to use DAQmxCfgDigEdgeStartTrig() to activate a digital start trigger. It also illustrates the continued acquisition, clock to external sampling and all events of samples N; for a simpler starting point, look at analog In\Measure Voltage\Acq-Int Clk-Anlg start and try to convert to using digital analog INSTEAD of triggers.

  However, this will start acquiring exactly when the trigger occurs, not after a period of time fixed. Use DAQmxSetStartTrigDelay() and DAQmxSetStartTrigDelayUnits() to add a fixed delay between the trigger and the beginning of the acquisition. Help OR-DAQmx C reference (which should be on the start menu under National Instruments > NOR-DAQ) lists the valid values for the property of units.

  Brad

• measure the voltage gpib

  I have to be able to measure the peak voltage in an alternating signal Ridge.  However, the frequency is 40 kHz, which is too high to measure using data acquisition (because the sampling frequency ira not very high).  How can I measure the waveform using a multimeter, gpib?  Is there a sample there code that will help me?

  Thank you

  BernoulliLizard,

  In your original post, you said you wanted to measure peak to peak voltage of a 40 kHz signal.

  I don't know all voltmeter that will do that.

  Get an oscilloscope or a DAQ hardware with a high enough sampling rate.  According to the bandwidth of the signal (not the same as the frequency of the signal), the PCI card for approximately $500 devices (US$) a variety of factors to form for $1500 or less must be able to do the job.

  Lynn

• How can I measure the voltage of a signal?

  Well!

  I'm trying to read the voltage of a signal using acquisition data PCI-6229 card.i am giving the signal as an input to the DAQ card and try to read the voltage level. The range of my signal is 4.8 ~ 5.5 VDC but the results are not accurate, such as measured with DMM. My code is as follows:

  1.i m using DAQmx create channel to create an analog input channel

  2. then a sample clock with finite samples, sampels by channel and set the rate of iteratively

  3. then I start the task

  4. analog playback 1 DBL AK1 N sample d

  Pressure readings I am differs widely that the actual.e.g a signal measured with DMM is 5v but when applied to the DAQ hardware and measured gives 6v.also I have to define minimum values and maximum in VI... If I put 4 to 5 maximum and minimum to measure a 5vDC signal it gives good result. , but if I change the maximum setting to 6v then it gives me results.also bad behavior is different for different signals for example when I measure a 6.5 VDC to signal that it shows me the voltage as 7.3V...

  Photo of my code of VI is attached... Please answer... or give me another code that works fine at the voltage of a signal reading.

  
  

• my project is to measure the voltage and current by using the view of laboratory.

  Dear Sirs,

  I have a project to measure parameters electric ac current, voltage, power factor etc through aquisitioin of data with labview. Can I do this? If yes then kindly help me with some opinions and ideas. I'll be very grateful to you.

  Muhammad Azam Hanan.

  Student of the University of engineering and Technolgy, Lahore, Pakistan.

  
  

• Measurement of voltage and the voltage with CompactDAQ display?

  OK, I just got my CompactDAQ hooked up with two modules (9225, 9239) and am able to simple single-phase voltage (120 VAC)... I connected an indicator, and it gives me shooting random sine wave values and what I'm looking for a simple voltage reading.  MAX and the DAQ assistant both work very well to the configuration task and I can see the signal in there.

  I dug through the DAQmx, watched functions in the knowledge base and have searched here without any real results.  I also downloaded the EPM resource kit, but it's tools for further on the road...  It seems to me that this should be simple crazy, but maybe I go too hard or just looking is not in the right place?  I would greatly appreciate a point in the right direction!

  Thank you!

  Chad

  With the help of... Windows XP (SP3), LabVIEW 2009, cDAQ-9174, 9225, 9239.

  Chad,

  When you say "simple voltage readout" are you referring to the effective voltage of the AC signal?  If Yes, you can use the Express VI 'Amplitude and level measures' to calculate the desired value.

  

  Hope this helps, otherwise if specify you what you are looking for a little I will try again.

  ~ SimonH

• Measurement of voltage USB 6008 ranging from 1mV

  Hi, I'm doing a supply at an angle for an amplifier using the USB-6008. The ranges I look are - 0.5 to 0.5 V and 0.5 to 2.5 V. To generate negative tensions, I use the + 2, 5V for a reading of differential voltage output as a 'ground '. Voltage measures have a delay that varies with the voltage, given this by drawing these variations and set the output to data acquisition there is still a 'noise' of +/-1 mv so that it is clear from this parcel of tension against the sample number:

  

  It seems that at some point the values are being rounded up to the nearest millivolt. I need to get to a resolution of 0.5 mV for my device, it will be possible with the USB-6008?

  The AO USB-600 x has a range from 0 to + 5 V and the 12-bit resolution. 5/4096 = 1.22 mV. Absolute precision is 7 mV typical and 36.4 mV maximum full scale.  The noise of the AO is not specified.

  If you measure the results with THE USB-6008, you have at least 0.5 mV, similar resolution system noise and absolute accuracy of 2.5 mV or more.

  It's probably as good as you will get with the box USB-6008.

  Lynn