Example study problems for Labview

I've found 3 sample Labview study problems, on the NI website, that are intended to be used as practice tests for the CLD. These posts were the Traffic Light Controller, the Security System and the Car Wash problems.
Does anybody know of an area where I can find more LV example problems to practice with that are similiar in scope to these problems?

If you can solve the example exams that they provide in the 4 hour limit then you have a good chance of passing. This means lock yourself in a room, start from scratch, and code for 4 hours straight and see what you have at the end of 4 hours. It is not the same as programming 1 hour a day for four days. Keep in mind that you need to read and follow the LabVIEW style guide to the best of your ability. As it states on the sample exams:
Programming style (15 points)
Functionality (15 points)
Documentation (10 points)
This means that you get 15 points (37.5%) to make it work. If you don't do the documentation or have good programming style you will fail. Based on my personal experience if you have less than two years of solid LabVIEW then the prep course would be a good choice. This assumes that you have good programming style and use all that is recommended in the exam and LabVIEW style guide.
Matt
Matthew Fitzsimons
Certified LabVIEW Architect
LabVIEW 6.1 ... 2013, LVOOP, GOOP, TestStand, DAQ, and Vison

Similar Messages

Where can one fine TCP socet server and client example VI's for Labview 6.0

We've inherited an older system containing two PXI systems and one PC. The Labview -6.0 programs running on the three systems need to be rewritten from ground zero.
In hopes of saving a great amount of time, I am looking for a couple of TCP socket VI's that can be used to set up communications between the applications. There doesn't appear to be a backwards compatibility from examples found in newer versions of Labview.
Thanks,
KGTang

kgtang wrote:
We've inherited an older system containing two PXI systems and one PC. The Labview -6.0 programs running on the three systems need to be rewritten from ground zero.
In hopes of saving a great amount of time, I am looking for a couple of TCP socket VI's that can be used to set up communications between the applications. There doesn't appear to be a backwards compatibility from examples found in newer versions of Labview.
Why backwards compatibility?
Look in examples/comm/tcpex.llb. Those examples are still mostly unchanged in the newer LabVIEW versions too.
Rolf Kalbermatter
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions

We have a PCI-6110S to run our VIs. But, we are planing to buy another card (PCI-6024E) to run real time PID vi. So, if they are installed at the same computer, would it be a problem for LabVIEW to run both of them at the same time.

We have PCI-6110 S series installed in our computer. We are planing to purchase PCI-6024 E series card. They will be both installed at the same computer.
1) I am wondering if we run both of them at the same time, would we have any problem?
2) To run PID real time, can any E series of PCI card be used?
Thanks...

Hello Baho,
1) Using Traditional NI-DAQ, there could be problems with the fact that the NI-DAQ driver is not multi-threaded; meaning that while waiting for one operation to complete, the driver could cause another operation to time out. On the other hand, DAQmx is multi-threaded, and would eliminate this problem. At the time of this writing though, DAQmx does not yet support simultaneous-sampling boards like the PCI-6110S. A good solution then would be to use Traditional DAQ for the 6110S and DAQmx for the E-series board, and they would by default run in separate threads.
2) No, using a PCI E-Series board, the LabVIEW VI would have to run in a Windows OS and would not be Real Time or run deterministically. You can run the PID program in Windows, but the
results could be inconsistent. The advantage of a Real Time is that the OS is deterministic or that the OS allows you to tightly control or determine the maximum time any function takes to operate. This kind of control of the maximum operation time is not possible with non-Real Time OSs such as Windows.
If you would like to get set up with a Real Time System, I suggest you contact your Technical Sales Representative.
Regards,
Chad Evans
National Instruments

After Replace queue.llb and notifier.llb for LabVIEW 6.1, I can't use find examples.vi any more.

After Replace queue.llb and notifier.llb for LabVIEW 6.1, I can't use find examples.vi any more.Error list shows that SubVI 'EF-remove queue element with exit or error stop vi': subVI is not executable.
Attachments:
snap158.gif ‏13 KB

I believe that by your action, you removed the compatability VIs and it would appear that the Find Examples used the older queue functions that require the compatability VIs. I would suggest you revert back to the LLBs that were distributed with 6.1. The new queue functions are there for you to use in new development and older VIs won't be broken. You could also make a request to NI support to see about an updated Find Example that uses just the new VIs.

Problems in Operator Interface for LabVIEW

Hi Ray,
I am using LabVIEW 7.0 and TestStand 2.0 version. I am using the default operator interface for labVIEW provided in the TestStand and i am using custom step types in my sequence file.
This sequence calls a VI, which transmits strings that i specify from the serial port to the NI-7831 RIO Fpga Card for differnt baud rates. The same sequence is working fine when called from Sequence Editor but it is not working when it is called from Operator Interface for LAbVIEW. It justs either fails the test or skips them. Please tell me if there is any solution for it. I have attached the sequence file and the vi that i am calling from my sequence file.

Hi,
You forgot to attach your sequencefile and VI, but never mind.
I think the problem maybe that because you are using the default Operator Interface.
If it still the one in the NI folder, then you will have to re build the testexec.exe application using your LabVIEW 7.0 Application Builder. The default exe file has been built using LabVIEW 5.1.1
Before you start, copy the LV folder from OperatorInterfaces\NI\ to OperatorInterfaces\User.
Load the testexec.bld file in your Application Builder and rebuild testexec.exe.
Launch your new testexec.exe from the User\lV folder and retry your test sequencefile.
Hopefully that should cure your problem.
Regards
Ray Farmer
Regards
Ray Farmer

Examples for labview having sub vis

I am making some examples for labview adding to labview example directory (..\LabVIEW xxxx\examples\my own examples).
My examples contains some sub vis. As i copy example files and sub vis to (..\LabVIEW xxxx\examples\my own examples) then i see all files in example finder example files and sub vis. Is there any method that doesnot show sub vis in wxample finder. I will be very thank full to you NI. Sorry if i am duplicating post.
regards

I have a couple of thoughts about your questions:
1) When browsing by Directory, yes you will see subVIs. A common practice is to put all your subVIs in a separate folder labeled 'subVIs'. That way they don't look mixed among your examples.
2) Darren is correct that the bin3 file format is the same for all versions of LabVIEW, and that the bin3 file you created for LV 2010 will work in 2011. Notice he mentioned to put your bin3 file in [LabVIEW 20xx]\examples\exbins. This is important for LabVIEW 2011 and beyond. In LabVIEW 2010 and prior we would look anywhere in the examples folder for bin3 files. To speed up the launch time of the NI Example Finder, starting in LabVIEW 2011, you must put your bin3 file in the \examples\exbins, instr.lib, or user.lib folder. You can find this information if you click the Help button from within the Prepare Example VIs for NI Example Finder.

Where can I find more information, tutorials, or examples using the toolkit NXT for labview?

I have read all the PDF's of the page http://zone.ni.com/devzone/cda/tut/p/id/4435 :
LabVIEW_Toolkit_for_LMS_NXT_Getting_Started_Guide
How_To_Create_NXT_Blocks_with_NI_LabVIEW
LabVIEW_for_NXT_Advanced_Programming_Guide
but I want to know if you know or have more information about, tutorials, examples using the toolkit NXT for labview.
I want lo learn more about this toolkit, but there isn't enough information...
thanks everybody that can help me

a list of LabVIEW leranings can be found here
http://www.ni.com/academic/lv_training/how_learn_lv.htm
for the NXT you can also look on the LEGO site
greetings from the Netherlands

I am looking for labview examples related to ECG

Hi, everyone!
I need your help.
I am looking for labviews examples, which are related
to ECG for my thesis .
I wait for your answer.
thanks in advance

Burcu;
I am not sure what type of examples are you looking, so this is a start:
Searching at the LabVIEW Discussion forum I found:
Example
calculate heart rate from ECG
how to design a suitable vi to acquire ECG waveform?
Doing a search with Google:
LabView Exercise to model and analysis ECG/EKG data
EE 206 MINI-PROJECT I CARDIAC MONITOR VI
Searching an NI.com:
PC-Based ECG Monitoring and Analysis Using BioBench (LabVIEW VIs at bottom - not sure if link is dead)
Regards;
Enrique Vargas
www.visecurity.com
www.vartortech.com

Is anybody has the example problem for AD/DA converter controled by PIC16F84?

In my circuit( Multisim 9), I use PIC16F84 as the
MCU to control the DAC and ADC. I want to ask if anyone has the example
problem for the controlling?
Further more, the I/O port of
PIC16F84 seems can not be connected with the digital output of DAC, so
I asked myself, is it right that for PIC16F84, the I/O port can only
connected with the serial port of DAC and ADC? Or it needs a converter
to adapt to the input port of DAC?
Looking for any help! Thanks!

You can test the new Design Circuit Suite (includes Multisim10 with MCU10 and Ultiboard 10 with Ultiroute10). When you open Samples you find the folder MCU with PIC folder. In these you can find some examples to PIC16F84. With that as pattern you should solve the problem.
I attached you here the MCU examples in the *.zip
For downloading the 30 days free test version you can use the link:
http://www.ni.com/academic/multisim/ and click to evaluation software
or these link:
https://sine.ni.com/apps/utf8/nigb.confirm?p_gb_prof_id=7350&p_lang=US&p_dl_url=&p_dwnld=N&p_code=GB...
Attachments:
MCUPicScreenshot.zip ‏964 KB

Problems using Labview as ActiveX Server

Hello,
       I have been having difficulty using Labview as an AcvtiveX server. I have reviewed all the postings on this subject and most are either pre Labview 8.2 and thus do not account for the changes made between 8.2 and 8.5 which broke the Activex server functions. I have looked at the recommendations for changing the to code to export (exported vi's in a DLL or Source distribution) and have tried these with no success. The closest example I have found was posted here http://forums.ni.com/ni/board/message?board.id=170&thread.id=283417 the example code they posted does ont work for me and still generates and error 3005.
      What i need is simple. I want to turn my applicaiton into a Vi server.. Expose a vi that acceses elements in the Vi server.. (controls, queues, Globals etc) that are in the Vi server context. I would then like to build a vi .. or dll that calls the 'exposed' vi in the vi server to pass data to or from the vi server. The V test.zip example file in the above indicated post is a pretty good example of this .. it just does not seem to work when i build it in 8.5. Are there any GOOD and 'current' examples of using labview as the ActiveX server (Compiled) and calling exposed vis from an external application Labivew, Visual Basic.. etc?? I am only interested in cases where Labview is the Sever. or both client and server.
       I have used a tool "ActiveXplorer" to examine the registered "exe" when the viserver is run. It always shows that there is no Type Library associated and the object is not creatable. There is a .tlb created by the project build however, where as the previous version 8.2.1 of Labview did not build that correctly. I have also tried this on 8.6 with similar error 3005 generated. sooooo what am i missing?
      Thanks
       Louis Ashford

Mike,
       Thank you for your response to my question. The problem is that the example you site does not use the Labview vi as the Server. Excel is actually the vi server and the automation open is using and excel automation object. I am sure that Excel creates proper automation objects .. Labview however does not seem to. So while this example shows how labview can function as a client it is not an example of a compiled Labview Sever being accessed by a 'laview vi'. Possibly I am not looking at the vi that you are thinking of.
       The examples i am aware of:
                   "ActiveX Event Callback for Excel.vi... (Excel is server not Labview vi)
                    "ActiveX Event Callback for IE.vi (same Labview vi is client)
                    "Write Table to XL.vi" ( again excel is the server)
                    "3D Graph Properties - Torus.vi" (accesses an activex Control 'not' and Activex EXE)
                    "3D Lorenz Attractor Draw at Compeltion using 3D Curve.vi (Uses an activex control not activex Exe server)
                    "3D Parametric Surface - Ribbon.vi (Uses an activex control not activex Exe server)
                    "3D Surface Example - Fluctuating Sine Wave.vi (Uses an activex control not activex Exe server)
                    "Excel Macro Example.vi (Uses excel as automation server..not Labview)
                    "FamilyTree.vi (uses MSComctlLib.ITreeView object not Labview as server)
                    "SlideShow.vi" (uses PowerPoint._Application not Laview as server)
      Most of the posts I have seen are for versions prior to Labview version 8.2 (where the ActiveX server was broken) I have seen only a few posts that actually address the issue i am talking about. however thus far no real solution has been offered. I get the same results when compiling and testing this with 8.6.. as well. So have you tried this Mike? Possibly i am missing something very simple..
      The example i did find and gave the link to is a pretty simple one. This does not work on my machine at all. You can select the automation server that is registered with windows after running the server one time and this then breaks the client vi.. I have found by reselecting the GetViReference property node in the Client vi that it will the 'fix' the client vi as far as labview is concerened and it no longer shows and error. Now when you run the Client vi it will infact find the vi server and will launch it ok. However. The open automation object then hangs.. for quite some time then returns the error
"Error -2146959355 occurred at Server execution failed
in Client_reader.vi" Obviously the automation Exe (server) was seen because it was opened yet it did not return a valid reference so the subsequent property nodes in the client.vi will fail. Something is wrong with Labviews opening of or creating of automation objects..
          Thanks,,
                Louis Ashford

Case study: "Large?" labview programs flooded with different VIT's

Case study: "Large?" labview programs flooded
with different VIT's
Type of application:
Computer with loads of individual hardware connected or other software (either
onsite (different buses) or offsite (Satelite/GSM/GPRS/radio etc.).
Hardware
description: little data "RPM" but communications to all devices are intact.
More "RPM" when many VITs are involved.
Size: 1000+
VITS in memory (goal). Total software has been tested and simulated with 400.
I'm posting
this post after reading this thread (and actually I cant sleep and am bored as
hell).
Note: I do
not use LVOOP (but sure post OOP examples, am starting to learn more and more
by the day.)
Things I
will discuss are:
Case 1: Memory usage using a plugin
architecture
CASE 2: memory usage using VITs (!)
CASE 3: updating datastructures:
CASE 4: shutdown of the whole system
CASE 5: stability & heath monitoring
CASE 6: Inifiles
CASE 7: When the hardware is getting crappy
Total
application overview:
We have a
main application. This main application is mainly empty as hell, and only holds
a plugin functionality (to register and administer plugins) and holds an
architecture that holds the following items:
Queue state
machine for main application error handling
Queue state
machine for status messages
Queue state
machine for updating virtual variables
Event state
machine for GUI
Some other
stuff
Other
global functionality is:
User
logins, user configurations and unique access levels
Different
nice tools like the good old BootP and other juicy stuff
Supervision
of variables (like the NI tag engine, but here we have our own datastructures)
Generation
of virtual variables (so that the user can configure easy mathematical
functions and combining existing tags)
Licensing
of plugins (hell we free-lance programmers need some money to don't we?)
Handles
all communication between plugins themselves, or directly to a plugin or vice
versus.
And now we don't
talk about that (or marketing) the main application .
Message Edited by Corny on 01-20-2010 08:52 AM

CASE 3: updating datastructures:
As we do NOT use clusters here (that would
just be consuming) we only use an 1D array of data that needs to be updated in
different functional globals. If the the number of VITS exceeds so that the
updating of this datastructures becomes the bottleneck, this would cause
delays. And since in this example we use 250 serial interfaces (lol) we do not
want to disrupt that by any delays. When this happends, does anyone know a good
solution to transfer data?
A thought:
perhaps sending it down to the plugin and let the plugin handle it, this should
save some time, but then again if more VITs are added again this would become a
bottleneck and the queue would fill up after a while unable to process it fast
enough. Any opinions?
CASE 4: shutdown of the whole system
Lets say we
want to close it all down, but the VITs need perhaps to do some shutdown
procedure towards the hardware, that can be heavy.
If we ask
them to shutdown all together we can use an natofier or userevent to do this
job. Well, what happends next is that the CPU will jump to the roof, and well
that can only cause dataloss and trouble. The solution here was to let the
plugin shut them all down one by one, when one has been shutdown, begin at the
next. Pro; CPU will not jump to the moon. Con's: shutdown is going to take a
while. Be ready with a cup of coffee.
Also we
want the main application not to exit before we exit. The solution above solved
this as the plugin knows when all have been shut down, and can then shut itself
down. When all plugins are shutdown - the application ends.
Another
solution is to use rendovous (arg cant spell it) and only shut the system down
when all rendezvous have met.
CASE 5: stability & heath monitoring
This IS
using a lot of memory. How to get it down. And has anyone experienced any
difficulties with labview using A LOT of memory? I want to know if something
gets corrupt. The VITs send out error information in case, but what if
something weird happens, how can I surveillance all the VIT's in memory to know
one is malfunctioning in an effective way/code (as backup
solution so the application knows
something is wrong?
CASE 6: Inifiles
Well, we
all like them. Even if XML is perhaps more fahionally. Now Ive runned some
tests on large inifiles. And the labview Inifile functions use ages to parsing
all this information. Perhaps an own file structure in binary format or
something would be better? (and rather create an configuration program)?
CASE 7: When the hardware is getting crappy:
Now what if
the system is hitting the limit and gradually exceeds the hardware req. of the
software. What to do then (thinking mostly of memory usage)? Needing to install
it on more servers or something and splitting configurations? Is that the best
way to solve this? Any opinions?
Wow. Time for a coffee cup. Impressive if someone
actually read all of this. My goal is to reach the 1000 VIT mark.. someday.. so
any opinions, and just ask if something unclear or other stuff, Im open for all
stuff, since I see the software will hit a memory barrier someday if I want to
reach that 1000 mark hehe

ActiveX wrapper for Labview

Hello!
My name is Daniel. I'm from Argentina and I work in Tracnova S.A.
Tracnova is the Distributors of NI in Argentina.
I am having an issue with ActiveX development for wrapper an dll driver.
I have to read strain gage aquisition data from an USB device of MANTRACOURT (http://www.mantracourt.co.uk/products/wireless-telemetry).
The manufacturer provide an dll driver. It's shipped with example for VB6 that I have been testing and it works fine.
BUT I HAVE TO USE IT IN LABVIEW.
My first problem is that I have to provide an CALLBACK function pointer as parameter to "INITIALISE" function of the dll. Here is an excerpt from the
example that is shipped (Excerpt from a form module):
Private Sub Form_Load()
    'we will only handle base station addresses of 1
    iBaseAddress = 1
    Caption = Caption & " [DLL v" & VERSION & "]"
    CLOSEPORT
    'set the callback so we can receive data provider packets
    Init AddressOf CallBack ''''''----------------->>>>>>>>>>>>>>>> CALLBACK function pointer as parameter to "INITIALISE" (It defined as Init)
    'Open USB interface
    ok = OPENUSB
    If ok <> 0 Then
        ShowMessage "Cannot open USB interface!" & vbNewLine
    End If
End Sub
"CallBack" function is contained within .bas. Because You can only retrieve the address to a function or sub (public or private) contained within a
Standard VB Module. There's no way around this.
Here is an excerpt from the example that is shipped (excerpt from a Standard Module):
Sub CallBack(ByRef StringPtr As Long, Length As Long)
    Dim PBMsg As String, rc As Long, pEnd As Long
    Dim p(128) As Byte
    Dim cH As Byte
    Dim tID As Long
    Dim C As Integer
    On Error Resume Next
    CopyMemory p(0), ByVal StringPtr, Length
    PBMsg = Left$(StrConv(p(), vbUnicode), Length)
    'strip off the base station wrapper
    PBMsg = Mid$(PBMsg, 4, Len(PBMsg) - 5)
    If PBMsg <> "" Then
        Debug.Print CVStr2HEX(PBMsg)
        Select Case Asc(Mid$(PBMsg, 1, 1)) And &H1F
        Case PT_DATA_PROVIDER
            'pass data to the main form if we are not closing
            If Not Closing Then MainFrm.ShowMessage "DATA_PROVIDER Data Tag=" & Replace$(CVStr2HEX(Mid$(PBMsg, 2, 2)), " ", "") & " Data=" & Decode
(Mid$(PBMsg, 5, Len(PBMsg) - 6)) & vbNewLine
        End Select
    End If
End Sub
Then, when an data packet arrived, the driver call to "CallBack" function instead, so I can process it and do what I need.
But I can't pass pointer to function IN LABVIEW WITH "LOAD LIBRARY FUNCTION". So I did an ActiveX in VB6 for wrapping the dll of the driver. I attached the
files tha I did. The ActiveX sends an event to labVIEW everytime that a data packet arrived. I trigger an event inside the CallBack function that it's
not working, but if outside (look inside Iniciar() function where I wrote "This is the first event", the event trigger works.)
Why is not THE CALLBACK FUNCTION TRIGGERING THE EVENT INSIDE THE LABVIEW??
I also tried to make a Win32 DLL with C + + using PostLVUserEvent, but neither worked for me. I can send the code in C + + if you want to review.
Thank you for your consideration. I look forward to hearing from you.
Best Regards
Daniel Lopez
Design Engineer
TRACNOVA SA
www.tracnova.com
Attachments:
ActiveXPropia.zip ‏459 KB

Thanks a lot nyc for your kind reply.
Yes, you are right. They have COM driver, but the event does not fire in labview. Also, this driver does not implement a COM circular buffer which means that if you delay reading and processing the data, these are lost because they are rewritten. I have been asking for support to MANTRACOURT, but after several attempts, they told me they do not provide support for labview only for VB, VBA excel, and some other more, not even C + +
National I miss to much. Nice technical support !
Please help, I need to fix this issue
Thanks a lot!
Daniel

Looking for LabView driver for Suruga-Seiki motorized stage controller model D70

I'm Looking for LabView driver for Suruga-Seiki (Japan)motorized stage controller model D70, GPIB or RS232 (optional model D92).

Hi,
Unfortunately, I was unable to locate a driver for your instrument. I would like you to submit a request for this driver at: http://zone.ni.com/idnet97.nsf/instrumentdriverrequest/ and with the instrument manufacturer. We develop drivers based on demand and popularity so the more requests we have for it, the greater the possibility that we will develop one.
If you would like to try developing your own instrument driver (or modify the existing one), we have documentation, model instrument drivers, and driver templates to help at :
http://www.ni.com/devzone/idnet/development.htm
We also have a syndicate of third party vendors that specialize in National Instruments' products and services. Some of the vendors specialize in driver development. I would s
uggest contacting one of the Alliance members at:
http://www.ni.com/alliance
An instrument driver is a collection of functions that implement the commands necessary to perform the instrument�s operations. In short, someone read the instrument user manual and implemented some of the functionality in a program for the end user. Instrument drivers are not necessary to use your instrument. They are merely time savers to help you develop your project so you do not need to study the manual before writing a program.
There are example VI's in LV on Instrument Connectivity. If you go to the Help menu >> Examples.. >> I/O, you will see a couple and Examples.. >> Fundamentals for File and String manipulation. I would suggest tweaking them to suit your application. Also the specific command that your instrument responds to can be found from it's manual.
Some useful resources for your application are
ni.com > NI Developer Zone > Development Library > Instrument Connectivity
http:/
/search.ni.com/?col=alldocs&layout=TechResources&ql=a , to search examples and knowledge bases
Hope this helps!
Best Regards,
Aaron K.
Application Engineer
National Instruments

DCT for Labview fpga

Hi,
I have problems based on dct for labview fpga. I get the project example from this link https://decibel.ni.com/content/docs/DOC-8202. I run the project in labview and its run succesfully. After that, I try to use a different vhdl code for the CLIP (in labview) that I get from open cores (http://opencores.org/project,dct_idct). I rewrite the fpga.vi by inserting a new vhdl code in the CLIP. When I run the project, there are no errors. However, the compressed image is not display. I check the output values from the Read from FPGA block at the host.vi and it shows zero values at all time. I try to debug, but still don't get the solution. Anyone expert please help me. Thanks in advance.

Hey Troy,
Have a look at the attached front panel design that will be compatible in FPGA.
Hopefully it helps!!
Aashish M
Applications Engineer
National Instruments
http://www.ni.com/support/
Attachments:
FPGA_CALC.vi ‏22 KB

Dear frnz, i am doing my prjct in Lview. ie online PQ monitoring. i need to simulate the system with disturbances generated in Lview. so can any bdy plz tel me how to genrte PQ problems in labview. thanks in advance..

dear frnz, i am doing my prjct in Lview. ie online PQ monitoring. i need to simulate the system with disturbances generated in Lview. so can any bdy plz tel me how to genrte PQ problems in labview. thanks in advance..

I work in the power conversion industry and do these types of measurements all the time…
Do you want to just measure power quality or create and measure power quality problems?
What hardware are you using?
Power quality analyzer?
Programmable AC power source?
Fast Transient Generator?
Here is an example of what I do.
To create PQ problems I use a California Instruments AC source set to nominal power for the unit under test. Using Labview I program several transients consisting of fixed and random duration dropouts and surges. I also use a Schaffer Fast Transient Burst Generator to apply high frequency noise bursts directly onto power lines.
For measuring power quality I use a Voltech PM3000A power analyzer and Labview to measure everything from voltage, current, and frequency, to harmonics and %THD
Message Edited by RTSLVU on 07-23-2008 10:31 AM

Example study problems for Labview

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