data acquisition in line voltage and current signals

Similar Questions

• How to display the voltage and current of synchronously

  Recently, doing a project on the acquizeing voltage and current synchronouly, then display. the design is welding a resistor(1%) 0.5 ohm in NI 6251 entered analog of her HAVE differential, then acquired the differential voltage at the input to convert current. At the same time, I hope to recover the path of analog input voltage. My problem is that the current profile data. Please help me .the program screenshot is show below. ---1. Perhaps you ask why not use no. - a way to get voltage at all port of AI, then in the use of the software less to get a voltage inputs HAVE. in this way, my problem is solved. I try, but the current accuracy is failure. because my current range expect is 1uA ~ 100mA. precision current samll won't be promised if you use simple ways for granted NOR 6251 voltage. NEITHER 6251 device spec (HAVE an absolute precision) (v) nominal range sensitivity absolute Accuracy (uV) 10 1920 112 5 1010 56 2 410 22.8 74 0.2 6.4 0.1 52 6.0 (I want to use this range to measure current samll) - cordially Shawnh.Chen

  shawn1 wrote:
  1. how show the waveform by accumulating 1 d data table, rather than showing all 100 acquisition

  Use a waveform graph.  Graphics keep history, you do not have to accumulate the data.  He does it for you on the screen.

  shawn1 wrote:
  2. What is the minimum unit of identification of the TSC103IPT amplifier? I doubt that the 0.5uA can be identified? (0.5uV = 0.5 ohm * 1uA) Because I can't find anything on the auccary in TSC101IPT datasheet.

  The amplifier is analog.  Thus, he can win anything.  But you should really think about a higher resistance if you really want to measure this small of a current.

• calculate the symmetrical components of voltage and current

  Hi all. I work on the calculation of symmetrical components of voltage and current in Labview. I have included the relationship between the symmetrical components and sequence as photo 1 voltage. I'm going to use this calculation for several times, so I wonder if anyone has some ideas far better bc I wired just so much together to realize the expression. It seems aweful. Any suggestion? as built-in function to achieve this function? Thank you

  Let's take a look on your form (you don't say what is complex, etc, so modify as needed)

  

  For example, here is how you create the matrix A to an alpha given.

  

  Similarly, you can create A ^(-1) matrix (your definition of A and A ^(-1) seem incompatible, otherwise you could just pick matrix inverse of A). After that, you can multiply with you V123 vector using AxB.

• Chroma DC power supply RS232 communication (read problem of over-voltage and current)

  Dear all.

  I chroma programmable DC power. Based on the programming of the Instrument manual I develop using RS232 communication. Based on the program I can set the voltage, current, over-current protection, protection against overvoltages and make IT / OFF out put supply perfectly.

  But I have to read the measured values of the output power as current and voltage. Measured applications are the voltage and current of the output of the power supply. My problem is two of them read at the same time. Currently, the reading is only voaltge or current (if the first request is v? it is voltage read out but no reading for the current) and if the first request is CURR? the reading for the current, but not for VOLT? The status message is OK, even if it is to read values.

  Thanks in advance

  What I see in your program, it's that you do not use the stop for reading character. For your writing, you do the hard with all these concantanate string functions. You can set the stop character for all entries with a node unique propert - "ASRL end Out.

• can I use instead of conditioning of analogue output signals data acquisition to provide voltage outputs analog?

  Hello guys,.

  I have a general question regarding the units of packaging such as the USB-9263 analog output signal. If I can use it instead of data acquisition to provide an analog voltage output?

  Thank you

  ELA

  Yes, the 9263 can provide 4 output channels analog voltage (+/-10 v range) with up to 1mA of current drive. Looks like: it refers to the short circuit of conditioning of signals and some protection against overvoltage. Link below is the User Guide:

  http://www.NI.com/PDF/manuals/372406b.PDF

  -AK2DM

• scanning voltage and current measurement for Keithley 2400

  Dear all

  Hello

  can someone help me?

  Despite days nearlly10 I am option to find any program LabVIEW 2010 for sweeping the voltage and measure current who works with RS-232, I have a end not have nothing exept examples read single and multiple data. I tried to SmartData labview and changed a few prorgram gpib to RS - 232, but I couldn't.

  In another attempt to find a good VI "votltage scanning and current measurement" that work with RS-232 in labview 5.1.1. I have converted in 2008, but it takes old driver (ke24xx.dll) and do not work in my labview 2010 and I could ' t find older driver.

  My thesis project was halted in those 10 days, and I couldn't do anything for our keithley.

  Please helpe...

  in the following, I have attached these files:

  1.-first, what voltage scan that works with GPIB

  2 - Vi that I change the gpib for visa (rs232) port that I don't know why it doesn't work.

  3. it is Vi related to the "sweeping and current measurement votltage" that works with the RS-232, but it takes old dirver so I can't use it.

  4-slot-VI necessary for the implementation of program 3 (but there is no driver for these subVIs) was attached to the reply message of this post

  If any body has this program ("scan votltage and current measurement" running rs - 232) please send to me

  Thanks in advance.

  None of you attached the screws are the driver OR you spoke. There is no conversion required for this driver.

• Variables for voltage and current on each component (for use in graphically the diagram)

  Hello

  I have a very simple circuit containing only a source of AC voltage and resistance of two series.

  I want to draw the voltage of the source and each resistance. I can't find any variable involves pre right now, I know I und came to the value of the resistance.

  for example

  UR1 = I * r1

  USource = I *(r1+r2)

  It's pretty boring... especially because that put in square brackets does not work.

  probably the cause variables containing itselfes media.

  hope you have an idea

  THX

  Hello

  The way that you have set in place now of things is correct. Multisim, as well as most of other circuit simulators, monitors the node voltages, no voltage drops. When you draw your diagram, Multisim assigns numeric node names to each node. That's why you see v(1) and v(2) and not something like V (R2). To find the voltage drop in R2, you will need to calculate V (2) v (1). To know the name of each of your nodes (also called threads), simply do the following:

  1. Click Options > properties sheet
  2. For option Net names, select Show all
  3. Click OK

  To make it easier for you, you can name a few nets to something that is easier to read. You can do this:

  1. Double-click on the net you want to rename (the net is the wire you drew connecting elements)
  2. Enter your name, preferred net in the space provided
  3. Click OK

  Hope that answered some of your questions.

• 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.

  
  

• 6009OEM output voltage and current

  Hi all

  Just try to make sense:

  http://www.NI.com/PDF/products/us/20043762301101dlr.PDF

  Page 3 says: high output voltage (push - pull, I = - 8.5 my) = minimum voltage 2.0 v maximum voltage = 3.5V but where can I find out what current can it provide and continue to produce an output voltage more than 4.2V?  (4, 2V is the worst case for the high threshold of logic of a chip, I want to control).

  Thank you!

  J

  Hello J,

  As you mentioned is the maximum voltage of 3.5V when you have a high output voltage (push - pull, I = - 8.5 my). If you need more than 3.5V then you might need to change to an open-drain output. As you can see from the link you provided that you would receive a maximum voltage of 5V.

  If you do not use an open-drain output you have to combine with a pull up resistor.

  I hope this helps.

• Venue Pro 8: use the charger with a little more voltage and current?

  I just bought a Dell came Pro 8 tablet used running Windows 8.1. The seller didn't have the original charger, so he gave me a 12W of Apple loader that had taken out nominal 5.2V and 2. 4A

  Is it okay to use this charger for my Tablet? Any potential problems in the long term?

  Thank you!

  I'm sure that the voltage is OK to 99.9%.  The extent of the current note goes, which is often misunderstood.  The rated current for a charger power or power is the maximum that the charger/power is able to provide. It could be evaluated to a zillion amps, but the equipment to which it will draw only what it requires.

• Card bad voltage outputs data acquisition / cut off voltage

  Hello

  I use a 6713 PCI and PCI MIO 16E1 and have a very strange problem: when I try out a voltage using LabView, I get instead of the voltage, a tension cut with a high unstable phase. Basically, all right, as long as my blood pressure is below 0.3V. All is well here, high level is stable, precise curve shape. But as soon as it exceeds 0.3 V, it is cut and the tension starts to drift. I have attached a drawing of the problem in this post.

  The system worked very well, but a week ago, the problem appeared. First he went again, but now he reappeared. The first attempt to define a certain tension might work, but already for the next pulse the problem occurs. Now she even work correctly once. Reboot etc did not help.

  The funny thing is, however, the same PC has two features listed above. I only and never used the PCI6713. When the problem occurred, I tried to move to the MIO 16E1 but it shows the same thing! Exactly the same problem here! I unplugged all the wires to the cards and it still does not work. Anyone here with an advisor?

  Thank you!

  Mike

  I was able the output voltage with a scope with 1 MOhm input impedance. But I found the problem by chance now! We got a whole batch of defective cables BNC! I already suspected the cable and tried different cables, about the same result. Then somehow, as I wrote, the problem disappeared once. Now, I used another type of cable to test the unit and it worked! So I checked the other BNC cables, and some of them seem to have a shortage between the mass and the Center, but in a way it produces sort of a junction diode (probably because of a layer of oxide somewhere). When I shook the cable suddenly I could measure a low impedance between the mass and the Center, but only for milliseconds, just like a bad contact.

  Really weired! But thanks for the help!

• Phaser in LabVIEW for voltage and current indicator

  When I read a research paper on the power system, I've seen has a reasearcher program LabVIEW (its block diagram is not shared just GUI). My question is: is-LabVIEW has a built-in function that allows to display the amount of complex in | Mag |

  

  Greetings muahang1234

  There is a suite for LabVIEW called Suite of electrical power OR LabVIEW that might interest you. Visit ni.com and evaluate the software, it may be the tool you're looking for!

  Let us know how it goes. Nice day.

• Creation of a current 64kHz with a data acquisition signal?

  I'll make a few measures of impedance and need a device to produce a signal of low current(0,1mA) 64kHz and to pick up 2 differential tensions. Are there materials Multifunction DAQ, which produces a constant current or can I use a device with an output voltage and a voltage converter?

  Adam

  I'm not aware of a source of current to 100µA at 64kHz metrologic...

  I would try this:

  http://www.EDN.com/design/analog/4324499/bipolar-current-source-maintains-high-output-IMPEDANCE-at-h...

  Why not just apply an alternating voltage and current measurement and the voltages?

  Another way to apply a rectangular waveform of 100µA: place a REF200 (100µA 2 references) in a diode bridge and apply a 64kHz squares

• When I send a 5v of data acquisition, the voltmeter indicates 5V, but when I connect a "normally open" valve Parker for the acquisition of data, the voltage decreases automatically a.14 V. It seems to be grounded. Why is this happening?

  We send 5v data acquisition using a voltage generator. Hook us it up to a voltmeter and see 5V. When connect us the generator voltage to a valve "normally open" parker, the voltmeter indicates .14V. It seems that when we connect the two sons of the valve for the voltage generator, the son act as pattern. We want to control the voltage flowing to tap through Labview. We checked the wires to the valve and they work very well, because if we send a constant 5V since the acquisition of data and put ashore, she, the voltmeter indicates 5V. Someone knows why the son act as pattern and low blood to .14V?

  nsatpute wrote:

  Our data acquisition is NI USB-6259. The valve requires only a 5V max and our DAQ provides up to 5V. However, after connecting the valve to the acquisition of data, the grave tension to almost 0. We start from the principle that the son somehow act as the reason, but we are not sure if this is the case.

  The question here is not how much voltage the valve wants, it's the current needs of the valve.  The 6259 can put only 5mA via an analog output.  Your very likely tap needs much more than that.  If you need to add in an amplifier circuit that can supply more current to operate your faucet.

• 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