No proper signal with NI-4351 card

Hello,
I am trying to use a NI-4351 for temperature  measurement (together with TX-68T connector block). However, I don't get a proper signal in our laboratory. Using the MaX  and looking at  the test panel: there is sometimes the right voltage but most of the time  the signal is noisy or even more than that: it is jumping to the maximum and minimum of the voltage range (for every voltage range).
In an another building with another supply circuit the signal is okay. So we suppose an EMC problem: Together with the Elec. department we have disconnected all "critical" consumers- no change, also filtering the supply of the PC has no effect.
Can you propose a special supply voltage filter? The noise frequency is very low (less than 1 Hz). Other lab cards and electronic devices work properly under the same conditions. Has anyone ever had this kind of problem? Any solutions?
Thank you.
Bernhard

okay, but I don't know how to do it. Is there any possbility to do this in the MAX? Or can I access the card directly (without MAX?)? Or do I have to check hardware pins? Because at the moment I am using 2 virtual channels to make a readout in LabView and these virtual channels are not representing a real hardware information.
Bernhard

Similar Messages

  • No proper signal with NI-4351 DAQ-card

    Hello,
    I am trying to use a NI-4351 for temperature  measurement (together with TX-68T connector block). However, I don't get a proper signal in our laboratory. Using the MaX  and looking at  the test panel: there is sometimes the right voltage but most of the time  the signal is noisy or even more than that: it is jumping to the maximum and minimum of the voltage range (for every voltage range).
    In an another building with another supply circuit the signal is okay. So we suppose an EMC problem: Together with the Elec. department we have disconnected all "critical" consumers- no change, also filtering the supply of the PC has no effect.
    Can you propose a special supply voltage filter? The noise frequency is very low (less than 1 Hz). Other lab cards and electronic devices work properly under the same conditions. Has anyone ever had this kind of problem? Any solutions?
    Thank you.
    Bernhard

    double post
    refer to http://forums.ni.com/ni/board/message?board.id=250&message.id=13633
    Message Edited by TimoS on 07-06-2005 03:46 AM

  • TC measurements with PXI 4351 DAQ Card

    (I am using version 6i of LabVIEW). I am trying to create a VI that will use a PXI 4351 Card with a TBX-68T to take 4 thermocouple continuous measurements. I am also acquiring 8 voltages with a 6030E and TBX-68 and writing them to a file. My voltage data acquisition is modeled after "Buffered Continuous Analog Input.vi" I would like to aquire voltages and temperatures in the same vi, but using different devices and accessories. (I need a higher frequency for the voltage acquisition, and more precision with the temperatures). Is there a subvi I can use to collect the temperature data in the same vi as my voltage? I don't want the thermocouple DAQ to interfere with the voltage DAQ, either.
    I tried the NI435x thermocouple.vi
    but I couldn't get the Built-in Cold Junction Sensor to work or figure out how to combine it with my exisiting voltage acquisition. I also got NaN for my readings, and I checked the wire connections in all the sub vi's as suggested by another solution.
    Any comments would be great. Thanks in advance.

    Claudia-
    Thanks for the response.
    Regarding the CJC- When I switch it on, the temperature readings I get are very random, roughly negative 1 degrees. (I am operating right now at room temperature, and will be using J-type TC's to measure ~43 degrees C). Also, when I use the built-in CJC, the aquisition rate seems to slow down considerably. When I use the "user specified" everything seems to be ok, including the aquisition rate.
    I measured the resitance of the Thermistor on the TBX-68T and it was about 5000 Ohms, as expected.
    Just to make sure: When using the TBX-68T, do I need to hard-wire a thermocouple to Channel 1/auto-zero and another to channel 0/CJC? Because I connected a TC to channel 0 right now, but I wasn't 100%
    sure.
    I've attached my main vi and two sub vi's that I am using for the voltage aquisition part of my project. (Note:the current measurements are just voltage measurements multiplied by the recipricol of the resistance it was measured across, ie. 10).
    I would like to keep this file as is because it writes to a file exactly the way I want it to. I'd like to have the temperature aquisition with the 4351 in the same vi as the 6030E so that they both stop and start at the same time. I am just not sure how and where to log the temperature data since there will be fewer data points than the voltage data. Any suggestions? Should I write two separate files? can I somehow append them?
    Thanks again. Hope to here from you soon.
    Attachments:
    EBlackMainDAQ.vi ‏107 KB
    Save_Data8.vi ‏45 KB
    Build_String_Array5.vi ‏33 KB

  • Can I trigger the read of a buffer period measuremen​t with a external signal (PFI line) with my 6602 card? How can I do it?

    I am doing a buffered period measurement with a 6602 card, Labview real time. I want to measure the period of 6 rising edges of a TTL, but I want to do it exactly when an edge comes on other external signal (of course slowler than the previous one), that is to say that I want an external start trigger. Can anybody help me? I have hardly searched at the web and I have not found an example of code of what I am looking for.
    Another question:
    After reading the buffer, how does my program know that the data has been refreshed in a continuous measurement? I attach two VIs I am trying to make work and a quite explanatory bmp of what I
    want to do.
    Thanks.
    Attachments:
    rtc_regimen.zip ‏3 KB
    Buffered_Period_pulse_generation.vi ‏283 KB
    simgle_counter_pulse_generation.vi ‏177 KB

    Hello;
    I can't think of any way to accomplish that task. Once the counters have only two input pins, and both are in use when one configures the counter to do buffered measurements, there isn't a way to trigger that operation in hardware.
    I'm not sure if I understood your second question, however, the buffered operation on a counter is hardware controlled, meaning that a pulse on its gate input triggers the transfer of the count value from the counter register to the PC memory buffer. That is therefore a continuous measurement.
    Regards
    Filipe A.
    Applications Engineer
    National Instruments

  • HT201328 I'm trying to use an iphone 3 with t-mobile plan, itune say the phone is unlocked however i can't get a signal with the new sims card

    I'm trying to use an iphone 3 with t-mobile plan, itune say the phone is unlocked however i can't get a signal with the new sims card

    How is iTunes telling you it is unlocked? Did you go through an unlock procedure with your cell company and then Restore it in iTunes?

  • HTPC, HDTV & s-video at the same time with MSI RX1650XT card

    Hi.
    I have no luck in getting clone mode to work with the MSI RX1650XT card.
    What I want to do is to get HDTV 1080i on the DVI plug (connected to a Samsung M87 40" LCD TV) and at the same time I want to get the CLONED picture on the s-video out (connected to a old CRT 4:3 TV)
    And all this has to work with Microsoft Windows XP Mediacenter, MCE 2005.
    What I get is a cloned image with "scroll" function. This is annoying.
    Please advice.
    If I have to purchase a new VGA card, then please recommend one.
    Best regards
    Audun.

    Hi,
    I'm having similar problems with a 7800GS card at the moment. In my case, I can set the analogue VGA output for 1360 x 768, to match the native resolution of the TV I'm using, but the composite video output will only do 1024 x 768, with panning.
    If anyone knows of a card which can produce a composite video signal (PAL) with a 16:9 aspect ratio, I'd love to hear about it.
    This card also can't do a proper 1360 x 768 on its DVI-D output - it appears to produce 1280 x 768 with panning. Older nVidia drivers would at least offer a Viewport Lock function, so that a lower resolution cloned output (Secondary device) would keep showing the same portion of the Primary device output, without the annoying panning. They also removed the Desktop Manager, which meant we lost the ability to set up a hotkey  to toggle Clone mode. Grrr!
    I've posted a couple of questions to nVidia today, I'll let you know if I get any useful replies.
    Cheers

  • Help with Airport Extream Card in PowerMac G5

    Hello,
    I have purchased a used Power Mac G5 with the following hardware:
    Model Name: Power Mac G5
    Model Identifier: PowerMac7,3
    Processor Name: PowerPC G5 (3.0)
    Processor Speed: 2.5 GHz
    Number Of CPUs: 2
    L2 Cache (per CPU): 512 KB
    Memory: 2.5 GB
    Bus Speed: 1.25 GHz
    Boot ROM Version: 5.1.8f7
    While it works perfectly, the machine didn't come with an airport card which I installed:
    Wireless Card Type: AirPort Extreme (0x14E4, 0x4E)
    Wireless Card Locale: USA
    Wireless Card Firmware Version: Broadcom BCM43xx 1.0 (4.170.25.8)
    The machine appears to recognize the airport card and I can "see" my home network but can not connect to it. When I enter the WEP password, it just fails to connect. I have 2 other macs in the house (and an iPhone) along with an HP windows laptop that connect to this network without issue, so I am confused.
    I think there are (at least) 2 variables that I am unsure of:
    One: Do I have the right airport card? As best I can tell, I do. But if anyone can tell from the hardware info I copied above, I'd welcome any info. I did see some posts about "late model dual core" G5s (labeled as model 10,x in system profiler) that needed a different card. I took the airport extreme card from one of my other macs (G4 Mirror Door) and the card works perfectly in that machine. I THINK it's the right card for the G5, but can't be sure.
    Two: Do I have to install any software to configure the card on the computer.
    What else should I be looking for?
    Many thanks,
    Steve

    Hi-
    The Airport Extreme card for the MDD FW800 model is the same as in the G5 up to Early 2005.
    http://support.apple.com/kb/HT3024?viewlocale=en_US
    Did you connect the antenna to the card correctly?
    http://manuals.info.apple.com/enUS/AirPortCard.pdf
    Did you connect the external antenna (T shaped, plug in rear of tower)?
    http://support.apple.com/kb/TA27092
    After proper installation, it should just be a matter of making adjustments to your network settings.

  • When using rabbitmq-jms for vFabric RabbitMQ javax.jms.Message.getJMSDestination does not return the actual destination when it is received from a consumer listening on a Topic with a wild card

    When using rabbitmq-jms for vFabric RabbitMQ javax.jms.Message.getJMSDestination does not return the actual destination when it is received from a consumer listening on a Topic with a wild card. I have tested with both 1.0.3 and 1.0.5 clients with RabbitMQ 3.1.5.
    I was wondering if the community was aware of this problem and if there are any workarounds? If not what is the proper channel to file a bug report. An example code snippet is below. The test fails because the TextMessageMatcher expects the destination passed in on construction (second parameter) to equal the desination on the message received (aquired from getJMSDestination).
            Mockery context = new Mockery();
            final MessageListener messageListener = context.mock(MessageListener.class);
            final Latch latch = new LatchImpl();
            final String prefix = "test" + System.currentTimeMillis();
            context.checking(new Expectations() {
                    oneOf(messageListener).onMessage(with(new TextMessageMatcher("MSG1", prefix + ".1234")));
                    will(new CustomAction("release latch") {
                        @Override
                        public Object invoke(Invocation invocation) throws Throwable {
                            latch.unlatch();
                            return null;
            final Connection connection = createConnection(null, null);
            Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
            connection.start();
            Topic wildcardTopic = (Topic) getInitialContext().lookup(prefix + "." + "#");
            Topic destination = (Topic) getInitialContext().lookup(prefix + ".1234");
            final MessageConsumer consumer = session.createConsumer(wildcardTopic);
            consumer.setMessageListener(messageListener);
            MessageProducer producer = session.createProducer(null);
            producer.send(destination, session.createTextMessage("MSG1"));
            latch.await(5000);
            connection.close();
            Thread.sleep(5);
            context.assertIsSatisfied();

    Check where your MDB sends the [response] messages to.

  • Please! Help me with my SIM card problem!

    When I first bought the Blackberry Flip 8220, I was constantly having a problem with my SIM card and the signals. My signal would constantly drop down to none and would go into SOS mode. Not only that, but it would also say either "SIM Card Error,""Invalid SIM Card," or "Insert SIM Card." So, the RIM sent me a new replacement for the cellphone. For the first few days, it worked just fine but, as the time passed by, the phone started to have the similar problem. What's worse is that as the time passed, the more problem started to show up! Now, my side buttons aren't functioning and the rate of my phone experiencing the problem with the SIM card and the signals, similar to the ones mentions above, has risen drastically. For now, the side buttons aren't my priority but what I would like to find out is how come my phone is experiencing such problem with the SIM card and how I can fix it. Please, help me! Due to this problem, I can't even receive the international calls.

    Hi and Welcome to the Forums!
    I don't believe that RIM issues SIMs...the carriers issue the SIM cards since these activate your phone on their network. RIM doesn't care what network you use...but the carriers do
    So, what I'd suggest is that you go see your carrier and find out what's going on with the bad SIM. It is also possible that the device itself has a problem with the SIM card contacts...in which case the advice is the same, your carrier provides your service, so going to see them is the right thing to do.
    Good luck and let us know how it goes!
    Occam's Razor nearly always applies when troubleshooting technology issues!
    If anyone has been helpful to you, please show your appreciation by clicking the button inside of their post. Please click here and read, along with the threads to which it links, for helpful information to guide you as you proceed. I always recommend that you treat your BlackBerry like any other computing device, including using a regular backup schedule...click here for an article with instructions.
    Join our BBM Channels
    BSCF General Channel
    PIN: C0001B7B4   Display/Scan Bar Code
    Knowledge Base Updates
    PIN: C0005A9AA   Display/Scan Bar Code

  • AI Buffer Read Problem with PXI-4351

    I have a PXI-8105 controller in a PXI-1045
    chassis with labview 8.2 installed.  I would like to use a PXI-4351
    board to measure a thermistor.   I am using the sample vi on the ni web page http://zone.ni.com/devzone/cda/epd/p/id/838, but I get an error code -10846 "AI buffer read" after a few acquistions.  I am new to Lab view --- what does this mean and how do I fix it?

    Well, I don't have ready access to a LV PC and for some very odd reason, my attempt to search for "error code" (and even just plain "error") on the ni website returned 0 hits?!?  Strange...
    Anyhow, I'll take a guess and offer you an idea for a workaround.  Could your error mean that your call to AI Buffer Read times out before the requested # samples have been taken?  This kind of error wouldn't be surprising as it's difficult to determine a reasonable timeout value.  Based on my own past experience with a 4351 board, I'd say that the whole notion of "sample rate" turns into something of an odd duck. 
    As I recall, all you can specify is a filter frequency which will establish a ceiling for your actual sample rate.  However, the board also has some sort of criteria for signal stability.  If you have several different channels to measure which use different input ranges, your actual sample rate can be reduced pretty dramatically.  So you might get a few samples per second or a few seconds per sample.
    The workaround I used was to always request data that had already been collected and was immediately available.  One of the inputs to the AI Buffer Read lets you set some parameters where you can specify that you want to read the most recent sample that's already in the buffer.  Granted, this may represent a temperature from a second or two ago, but this lag is not necessarily a major issue for temperature measurements.
    Note: in my app, I could query for Temperature any time I wanted, as frequently as I wanted.  I would always get data back, but there was no guarantee that I'd get *unique* data back.  In other words, if I called it 10 times in a tight loop, I might get the exact same sample # back each of those 10 times.
    -Kevin P.

  • Commutatio​n with 6280 DAQ Card

    Hello,
    I want to perform parameter identification of a three phase brushless DC servo motor. Basically I want to obtain mass moment of inertia, viscous damping coefficient and coulomb friction at the bearing. To do so, I plan to apply a step voltage input to the motor terminals and collect the position information with a DAQ card. I know the inductance and resistance values of the motor windings as well as the I want to perform parameter identification of a three phase brushless DC servo motor.
    Basically I want to obtain mass moment of inertia, viscous damping coefficient and coulomb friction at the bearing.
    To do so, I plan to apply a step voltage input to the motor terminals and collect the position information with a DAQ card.
    I know the inductance and resistance values of the motor windings as well as the torque constant of the motor.
    So when I apply a step voltage input to the terminals of the motor, I would know the torque that is applied.
    And since I know the torque that is applied and also collect the position data I would be able to plot torque vs. position curve and would be able to obtain the necessary parameters from this graph.
    My problem is; I don't know how i can apply a step voltage input to a three phase brushless DC motor.
    Is it possible to use a DAQ card (I have a PCI 6280 DAQ card) for commutation? If it's possible is there an example about commutation of brushless dc motor?
    I don't want to use a motion control card to perform the commutation since I want to observe the motor dynamics only.
    Regards.

    Hello,
    for commutation you need to synchronize the output signals to the absolute rotational position of your motor. Typically this is done by implementing a lookup table to output values according to the motor's angle of rotation. This operation requires deterministic real-time behavior, so you could use a DAQ board with LabVIEW Real-Time, but for your application an FPGA-based R-Series device is probably a much better choice.
    Instead of generating analog output signals, with an R-Series device you could directly generate PWM signals with sinusoidal duty cycles to control an external FET amplifier.
    Here you can find example code for such a setup.
    I hope this helps.
    Kind regards,
    Jochen Klier
    National Instruments

  • Can we demodulate the signal recieved at DAQ card without using any hardware interface(by only using labview)?

    Hi all,
    Can we demodulate the signal recieved at DAQ card without using any hardware interface(by only using labview)? if yes then how? please give brief idea.
    Regards,
    Amit

    There is probably a way to do it, but it it may be easier to use an X-series board for the job.   They support a new counter capability for count reset on a digital edge without needing to be configured in encoder position mode.  I am not sure exactly how that feature's been implemented however, so maybe it won't make things easier after all.
    The plan based on the hoped-for behavior: 
    1. Configure an X-series counter for pulse generation based on "ticks" of your clock channel.
    2. Set both initial delay and low time to the critical # of ticks.
    3. Configure for count reset on a digital edge (if possible in pulse generation mode)
    4. Configure the count reset value to be the critical # (or possibly 1 less, if possible in pulse generation mode)
    5. If you want the output to remain high indefinitely, configure the counter task to use its own output as a
    pause trigger, and pause while high.
    The way pulse generation works is to preload a # of "low time" ticks into the count register.  Then every source edge will decrement the count.  When the count reaches terminal count (0), the counter's output is toggled (or can be configured to pulse).  The register is then loaded with the # of "high time" ticks and the process continues.
    You would be perpetually interrupting the count-down process as long as you got your triggers in time.  The count would keep getting reset to the # of low counts, keep decrementing toward 0 without reaching it, and so on.  If ever you did reach 0, the output state would toggle high, then the high state would prevent subsequent clock signals from decrementing the count.
    You can conceivably do a similar thing with a 6601, but I'm pretty sure you'd need 2 counters working together to get it working.
    -Kevin P

  • When trying to purchase songs on my itunes with a gift card, its telling me i have to have the correct billing information on my debit card which I know is correct already. How do I go about fixing this?

    When trying to purchase songs on my itunes with a gift card, its telling me i have to have the correct billing information on my debit card which I know is correct already. How do I go about fixing this?

    Part of the validation for credit cards is that they need to be registered to exactly the same name and address that you have on your iTunes account, which prepaid cards tend not to be. Do you have a proper credit card that you could use ? Or are iTunes gift cards available in your country so that you could try using them as your payment method ?
    Until you have a valid payment method on your account and what you owe iTunes has been paid off then you won't be able to download any item from the store, including free apps (and updates to apps).

  • Measuring temperature with PCI-4351 & TC-2190

    Hi,
    I am a new LabView developer. I have a PCI-4351 data logger card and a TC-2190 thermocouple chassis. I cannot communicate with the 4351 cuz I don't know how. I've set up a channel with MAC and the hardware test works okay, but I can't find the right object to grab the measurement when I'm creating the vi. Do I use NI-DAQmx or VI Logger functions to take simple instantaneous temp. measurements?
    Is there some example code I can start with? I tried to run the ni_435x_thermocouple.vi example that I downloaded from the developer zone, but there are several sub-vi's not loaded on my machine (eg: AI Hardware Config.vi) that it tries to find upon launch. Looks like a vestiges of LabView 5 that aren't there anymore. Is there an easier way for this LabView 8 user?
    Sincerely,
    Jack Santori
    410-471-6262

    Hi Jack,
    The PCI-4351 only has support for the Traditional NI-DAQ functions and not NI-DAQmx.  It sounds like you don't currently have those drivers installed on the system, and this is why the Traditional NI-DAQ function AI Hardware Config.vi cannot be found.
    If you are running Windows 2000 or XP, the most current version of the Traditional DAQ drivers available for download is 7.4.1 and they can be downloaded here.  If you are not using one of these operating systems, Traditional DAQ driver versions for another OS can be found here.  Example programs are a great place to start, and the Developer Zone includes a wealth of information.  Installing the Traditional NI-DAQ drivers will also include example programs that you can open and run in LabVIEW 8.0 by going to Help>Find Examples.
    Regards,
    Andrew W
    National Instruments

  • How to measure frequency with PCI-4474 card

    Hi,
    I'm trying to measure frequency with PCI-4474 card.
    Any sample code available?
    Thanks.

    Hi,
    Thank you for posting the the NI forums.  There aren’t any example programs that ship with the DSA drivers.  Will you be using this with the Sound and Vibration Toolkit?  If so, there are numerous examples that install with this software package.  Check out the LabVIEW Example Finder >> Toolkits and Modules >> Sound and Vibration Toolkit. 
    In addition to this, you could also use the signal processing VIs that ship with LabVIEW.  There are also examples that ship with LabVIEW that use these VI in Example Finder >> Analyzing and Processing Signals FFT and Frequency Analysis.  There is an entire Signal Processing palette that should contain the functionality that you need.
    I hope this helps.  Post back if you have further questions. 
    Ed W.
    Applications Engineer
    National Instruments

Maybe you are looking for