PXI-4472 compatibility NIDAQmx base 3.4.0

Hi,
I have labview 10.0 in opensuse 11.4 and apparently there is no NIDAQmx support for labview 10.0 so I ended up installing the NIDAQmx base 3.4.0.
I have a PXI-4472 card and it is not detected with the apparent reason that the NIDAQmx base.does not support the PXI-4472.
Is there someone who has had a similar problem and is there any solution of working around this issue?
Please let me know,
Thanks,
Chiran

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Problem measuring frequency with PXI-4472 module

Hi all,
I am using PXI-4472 DSA Module to analyse the Frequency.
I am using LAbVIEW 7 software.
I am using the Spectral Measurement VI in Signal Analysis in Functions.
Using that i am not bale to measure the frequency more than 500Hz.
My card is able to measure upto 50KHz.
why it is happening?
what i need to do if i want to measure the frequency upto 50KHz?
regards
Preetam

What happens when you try to measure a signal more than 500Hz? What does the time domain signal look like? How fast is the NI-4472 sampling? Are you using a sensor such as a microphone? Or are you just making voltage measurements?
I would recommend starting on the acquisition side with a shipping DAQmx example such as "Cont Acq&Graph Voltage-Int Clk.vi" which can be found through the LabVIEW Example Finder under the DAQmx section. You will need to have at least NI-DAQ 7.1 to use DAQmx with the 4472, but it's always good to upgrade to the latest version. Here's a link which shows the latest versions of DAQ on a per device basis:
http://www.ni.com/support/daq/versions.htm
Once the time domain data looks good, then try to add the signal processing.
Let me know how it goes.
-Jack

Filtre PXI-4472

Bonjour,
Quel est le type de filtre a-t-on sur une carte PXI-4472?
Merci.

Bonjour,
La documentation donne bien une bande passante qui doit théoriquement commencer à 0 Hz (DC) :
En entrée de la carte il y'a un filtre passe bas avant le CAN :
Cordialement,
Da Helmut

Trouble capturing waveform from PXI-4472

I'm really a very green newbie at this stuff, so bear with me...
I've got a PXI-4472 data acquisition board and a PXI-5411 waveform generator. I've connected the arbitrary out of the 5411 to the channel 0 in on the 4472. An external oscilloscope shows a 1v-amplitude sine wave being generated.
I created a very simple VI to show what the 4472 is capturing. It connects a NI-DAQ channel I generated to the standard "AI Acquire Waveform.vi", then out to a Waveform Chart, all within a while loop with a Stop button. Problem is, all the waveform chart seems to be showing is the running average of the waveform instead of the form itself (solid line, a tad above zero).
I can hook the 4472 input channel up to a DC-out power supply, a
nd when I vary the voltage, the waveform chart changes as well.
So my question (whew!): What's wrong here that's not allowing me to capture a waveform from the 4472 (in turn from the 5411) and display it on my waveform chart?
Thanks in advance for the help.

Never mind.... it was a sample rate problem. I upped the sample rate and it came out ok.

How could I route 20 channals via a PXI-2501 to ch0 on a PXI-4472

I would like to use a PXI-4472 card to scan 20 signals. For this purpose I have a PXI-2501 which can be used to multiplex the 20 signals to, say, ch0 on the PXI-4472. I would like to know how can I scan each channel with a sampling freq of 1000S/s? Is it possible to synchronize the sampling and the switching?

Ali,
It will not be possible to hardware time the two boards due to the oversampling of the 4472. There are no hardware passed signals present that would correctly align the switch with the individual sampling of the 4472. As a result, it would be necessary to do this in software...Switch, take readings from the 4472, Switch, etc.
Regards,
Chris D
NI Applications Engineer

Low pass filter (PXI 4472)

Hi,
I would like to know whether the PXI4472 module has a built-in low pass filter ?? If yes, can you send me the specfication for that filter?? Also, does the the SCXI 1125 support Vrms = 2500V isolation ??

Hello,
The PXI-4472 has a antialias filter which limits the bandwidth of the signal it can represent. The SCXI-1125 has +-300 Vrms of working isolation per channel. The information regarding the PXI-4472 filters and the SCXI isolation specifications may be found at NI Product Manuals.
Let me know if you have any further questions. For direct questions regarding the PXI-4472, you will be better off posting a new question to the DSA discussion forum.
Best Regards,
Jared A

PXI 4472 DAQmx Start VI taking a long time.

I have an issue with DAQmx Start taking up to a secoond to to execute and it's killing my cycle time.
I have a PXI 8360 with 3 PXI 4462's and 3 PXI 4472's. I configure DAQ Task and Commit at the begining of the sequence however every time i do a DAQmx Start it takes about a second to execute. I need to do about 5 in each Test sequence so it's eating up about 5 seconds of cycle time. I am using DAQmx 9.7.5 drivers and Labview 2013. We have the exact same hardware and software setup in another location but we are not seeing this issue there.
Any ideas what might be causing this would be appreciated.
Attachments:
DAMmx Start.png ‏4 KB

Hi Nathan,
I verified this by disabling the Start Task VI.
I've attached the commit code.
Thanks
Attachments:
PXI 4472 Acquire.png ‏8 KB
PXI 4472 and 4462 Commit.png ‏13 KB

Need advice on best way to acquire multiple vibration waveforms from a PXI-4472 board

I'm using a PXI-4472 board to acquire vibration data from 8 proximity probes, each with different scaling. Confused as to best approach to achieve this given all the options with MAX, LabView and its Sound & Vibration toolset scaling. Reading other posts, it appears that 24 bit acquisition also requires some special treatment.
This acquisition needs to be done continuously.
As an additional side note, I will eventually need to synchronize these channels with the channels on 2 other 4472 boards.
Any advice on how to use MAX in combination with LabView's AI CONFIG, START, READ, CLEAR and scaling
for this application would be greatly appreciated.
All the best,
Hunter

Hello Hunter --
In regards to your questions...
For scaling, I would recommend using either MAX or the Sound and Vibration Toolset (SVT) scaling, but not both together. The SVT is a bit more flexible, and in general I prefer that. One other thing to keep in mind about MAX is that virtual channels for accelerometers and microphones provide an option to control IEPE excitation, but in fact this can only be set from LabVIEW for the 4472.
24 bit acquisition does not require any special treatment if you are only reading the scaled (i.e. voltage or engineering unit) data. If you use the binary array option for AI read, you will only receive the top 16 bits.
If you use the SVT scaling, you should not worry about MAX at all. If you you do define virt
ual channels in MAX for scaling, you should simply wire a channel array with those channel names into AI Config. Other than this, what you do in MAX should not change how you write the LabVIEW code.
Please see the attached example for synchronizing PXI-4472s.
Hope this helps!
Bryan
Attachments:
PXI_4472_Continuous_Synchronized_AI.vi ‏156 KB

Probleme avec la carte PCI 6O14 et Nidaqmx base 1.4 sous Linux

Je n'arrive pas a faire tourner la carte PCI 6014 avec le driver Nidaqmx base 1.4 sous Linux (Suse 9.0). lsdaq reconnait la carte mais le programme d'exemple acquire1point renvoi une erreur de timeout. Le driver prend-il bien en charge cette carte ?

Bonjour,
Le driver NI-DAQmx Base supporte la PCI-6014 sur Linux.
Je vous joins un tutorial qui explique comment utiliser DAQmx Base sous linux... Vous pouvez configurer vos voies dynamiquement ou statiquement.
Assurez-vous bien que l'exemple que vous utilisez demande une voie physique ou une tâche.
http://zone.ni.com/devzone/conceptd.nsf/webmain/42B73A7B82F0FEC786256FB1007227EC#6
Essayez d'autres exemples. Si le problème persiste quelque soit l'exemple, si vous ne parvenez pas à utiliser l'utilitaire "mxbaseconfig", repostez un thread.
Bon courage,
David D.
Ingénieur d'Application
NI France

How can i acquire signal magnitude per every 0.2hz using pxi 4472

helloi am using PXI 4472 card for FFT
analysis using LabView2009
i need to acquire the frequency Vs
magnitude for my application
Can anybody help me out to get
voltage magnitude for every (df)0.2Hz up to 500Hz bandwidth.
i could acquire the Voltage
magnitude for every (df)0.5hz,
with configuration continuous mode of 1000 sample
rate and 1000 samples per channel and spectrum measurement Express VI with
2000msec
delay time (‘df’=0.5Hz=1/2000mSec), further less ‘df’ program is terminating
intermittently
Please give your suggestion

Here is a good rule of thumb:
Frequency Span = 0hz to sample rate divided by 2.56
lines of resolution = record block size divided by 2.56
for example a 1khz sample rate and1k darta points is a 0 to 400hz spectrum (401 to 512 is calculated by not fully trusted in machinery world) and 400 bins or one bin per hz, df = 1.
so for this example if you need df to be 0.2Hz, you need five times as much data or 5000 data points.
Preston Johnson
Principal Sales Engineer
Condition Monitoring Systems
Vibration Analyst III - www.vibinst.org, www.mobiusinstitute.com
National Instruments
[email protected]
www.ni.com/mcm
www.ni.com/soundandvibration
www.ni.com/biganalogdata
512-683-5444

Mating smb connectors for pxi-4472

Where can I obtain mating smb connectors for pxi-4472 Dynamic Signal Analyzer. Prefer vendor and part number if possible. Also is this input a 50 or 75 ohm?
Thanks.

Here is a link to the SMB connectors that are sold through NI: http://sine.ni.com/apps/we/nioc.vp?cid=12702〈=US.
The minus input of the PXI-4472 connects to ground through a 50ohm resistor. Impedence matching is usually only important when preventing reflection of high-frequency signals, and with this board all high-frequencies will be filtered out with the anti-alias filters.

Setting PXI 4472 anti-alias filter

Please excuse what is probably a very stupid question. I am new to using the PXI DSAs
On a PXI-4472 DSA (as run by a PXI-8196 controller running LV 8.2) how do you programmatically set the cutoff frequency for the anti-aliasing filter? Can you even do this? I tried using the AI.Lowpass.CuttoffFreq property to set it, but it just returns error -200452 and says that "Specified property is not supported by the device or is not applicable to the task."
Thanks!!

Panthera395,
devchandler is correct the cutoff frequency is automatically set based on the sampling rate. The only way to modify the cutoff frequency is to either disable to filter, or change your sampling rate. For more information take a look at the NI Dynamic Signal Acquisition Help:
http://digital.ni.com/manuals.nsf/websearch/FCD835105CD3A20E86257130005DA240
The section on the Anti-Alias Filters explains the behavior of the anti-aliasing filters in more detail. Let us know if you have any additional questions. Good luck with your application.
Regards,
Neil S.
Applications Engineer
National Instruments
Message Edited by Neil S. on 09-14-2006 12:39 PM

Above-High-Level Triggering Mode with PXI-4472

In the PXI-4472 User's manual (April 2003 edition), Figure 3-9 shows a trigger that is active when an analog input is above a specified high Value. To which trigger is this figure referring? Also, I have seen the Configure_HW_Analog_Trigger function but do not see a VI that accomodates this function. I would like access to this trigger that is always high when the analog input is above a certain level.

These triggers are analog level triggers that are taken directly from one of the analog input channels. In LabVIEW, the DAQmx Trigger.vi can be configured to the trigger type that you need. In the shipping examples (Help >> Find Examples) for LabVIEW, a good example to look at would be Acq&Graph Voltage Int Clock Analog Start.vi.
For Traditional DAQ, the AI Start.vi is used to configure the trigger. The example Cont Acq&Graph(buffered) Hard A-Trig.vi is a good referrence for that. Hope this helps.
Best Regards,
Jeremy R.
NI - Applications Engineer

NIDAQmx Base Support for E-Series PCCARD?

Hi all,
are there any plans for supporting the PCCARD boards (as my DAQCARD 6062E) by NIDAQmx base for Linux in (near) future? I have built a measurement software in C++ combined with a Java surface that I also would like to test on Linux. It runs fine with MSWindows.
Thanks
Thorsten

pkreitler wrotevi Maps can't look inside my own phone at the Contacts for an address. So often I am looking for an address that is in my contacts. It would be great if Ovi Maps could look up a contact. Should be easy, right?
Try opening the contact you want in Contacts and then look in Options.

Nidaqmx base linux example and utility

I have a problem, i currently do not have labview installed on my labview, instead i have installed nidaqmx base in order to use the c api for my usb-6218. However, last time i had labview installed on ubuntu, labview could not detect the device. So, first is there any programs (free) out there which can tell me what labview devices are connected to my computer so i can debug the connection?
Also, are there any examples of the nidaqs base c api? I dont have labview installed so i cant access any examples in the program help.
Thanks!

Seems like the installation of the DAQmx Base Driver has not gone according to plan. What Linux distribution are you working with? Does it meet the outlined driver requirements for kernel inclusions?
SYSTEM REQUIREMENTS (Minimum System)
256 MB Memory
594 MB Disk Space for full install
NI-DAQmx Base 3.4.0f2 for Linux software for the Intel x86 architecture
requires one of the following distributions:
Red Hat Enterprise Linux WS 4
Red Hat Enterprise Linux WS 5
Scientific Linux 5.4
Scientific Linux 5.5
openSUSE Linux 11.1
openSUSE Linux 11.2
You must use the provided INSTALL script to install NI-DAQmx Base 3.4.0f2.
Patrick Corcoran
Application Engineering Specialist | Control
National Instruments

PXI-4472 compatibility NIDAQmx base 3.4.0

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