Usb-6009 analog output voltage

Hi,
The usb-6009 has two 0-5 volts analog ouputs. Is it possible to connect
them in series, in order to get a single 0-10 volts analog output
channel ?
Thanks,
Nicolas

Those are ground-referenced signals. To connect them in series, you would have to connect one of the outputs to ground. You would be shorting out (at least) one of your analog outputs, and probably damage the unit.
John Weeks
WaveMetrics, Inc.
Phone (503) 620-3001
Fax (503) 620-6754
www.wavemetrics.com

Similar Messages

USB-6009 Analog Waveform Output

I'm trying to create an analog waveform from a USB-6009 device through one of the analog output channels. However, through the DAQ Assistant, I can only select the 1 Sample (On Demand) setting. When I test the device, I can only push a constant voltage out. If anyone has any advice on how to create an analog voltage waveform using this device, I would like to know.

>I am only a novice at LabVIEW and data acquisition in general.
I don't use Labview (I write in C++) so I can't help you with that. I try to answer questions about C/C++ and general hardware questions.
>What did you mean by software-timed waveform generation?
That's where the software driving the device sends a sample to the DAQ device, waits for the prescribed time interval, then sends the next sample. So the timing of the waveform is driven by the software, using the computer's clock, instead of by the DAQ hardware. Software-timed is less reliable and has (often) lots more jitter because of competition for CPU resources.
>Does this mean that I cannot generate a waveform that is more than 150 Hz?
It's worse than that. It means you can't generate a waveform faster than 150/N Hz, where N is the number of samples (data points) that define the waveform.
John Weeks
WaveMetrics, Inc.
Phone (503) 620-3001
Fax (503) 620-6754
www.wavemetrics.com

USB-6009 analog input at certain voltage

i am using USB 6009
i want to use a certain voltage to activate something.
i want to activate a pop up vi inside a case structure at a voltage of 2.9V.
i want to de activate the case structure at a voltage of 0.13mV - 0.16mV . then the sub vi will close.
How to setup the DAQMX?
can provide any help ??
example will be good.
pls show where to find the icons. thank you

Hi Ace,
There are several examples from the LabVIEW Example Finder (Help»Find Examples...) that describe using limits. I searched "limits" in the Example Finder and found several examples that might help, such as Limit Testing Measurement.vi, Waveform Scalar Limit Comparison example.vi, and Limit Example.vi. In each, you would have to modify it to include data acquisition, but it shows how to take sampled data as you would get from data acquisition and perform a limit test. The Express VI that Jennifer O. suggested will probably be the easiest route, but there are other VIs that could suit your needs, as seen in the other examples.
As far as state machines, there is a template built into LabVIEW that can give you a starting point for creating your own state machine. Under the File»New... menu, you can choose the state machine template under VI»From Template»Frameworks»Design Patterns»Standard State Machine template.
Please let us know if you have any specific questions we can answer about configuring your data acquisition or about a specific VI. I hope this helps!
Regards,
Missy S.
Calibration Engineer
National Instruments

USB-6009 Digital Output Current

You need to have all those grounds connected together - USB-6009 Digital Ground, ULN2003 GND, and the power supply ground. In this case it will not matter how they are connected. If they are not connected, then one of the devices could be damaged.
Lynn

Hi, I'm trying to increase the voltage of the digital outputs of USB-6009 device. I read a couple topics about using a relay but I could not manage it.
I was thinking to use 5V supply on the card since it has 200mA current on it, but when I use it with open-collector output, it can not switch the relay. When I measure the current between
5V and ground: 200mA,
5V and output, I read a value around 30-40 mA.
Why can't I use that 200mA with an output? This is the relay I'm using.
If this is not possible, can I use an external 5V supply (with more current) and a digital output to switch the relay without damage the 6009?

What is USB 2.0 output voltage on 17 in Macbook Pro?

Need to know the exact output voltage of the MBpro 17" USB port- as i am hooking up very delicate electronic periphrial
--cant find it on line anywhere.. does anyone know?
[email protected]
thank you
g

You may find this Apple article useful:
http://support.apple.com/kb/HT4049
Ciao.

Usb 6009 continuous analog output

Hi
I'm pretty new to Labview, so you may have to bear with me. I have a USB-6009 and I want to generate a continuos analog output voltage. I've got the example you have posted 'Gen Mult Volt Updates-SW Timed_LV7.1 (0 to 4).vi' working and it outputs a continuous sine wave.
In a similar manner I need to generate:
1. Ramp up voltage (and ramp down voltage): starting with a continuos constant voltage, which after a period of time linearly increases to another constant voltage, and which allows me to specify the 3 time intervals and the rate of increase.
2. Pulsations: whereby I can specify the amplitude and time interval of each pulsation
This is so that I can control voltage to a valve which regulates my pipe flow. In the example I have (one stated above), I do not understand specifically:
i. Why I need both a 'Software Loop Time (ms)' as well as 'Timeout'
ii. The 'Sinusoidal Pattern' input which seems to generate data for a sine wave- I can't get a description of that and there are no similar VIs for other waveforms; and what is the function of the two numbers it has?
iv. How do I change amplitude and time period for the wave?
iii. What does 'Index Array' do?
thank you

Hi there,
I'm guessing the VI you are using is the one from this KB:
http://digital.ni.com/public.nsf/allkb/6F2C2B49A89D685C8625711D007BDD64
i. The software timed loop control is to control the rate at which you change the voltage output. The timeout on the DAQmx Write VI is the maximum time in seconds the VI will wait to output a sample (eg. if the write buffer is full, the Write VI will wait for it to become available for 'timeout' seconds before outputting an error).
ii. The sine pattern is just an array constant of doubles that make up the sine wave voltage values, and the for loop adds an offset (of two volts) to every single one of those values. You might want to replace that entire array constant and for loop with a Simulate Signal Express VI (just search for Simulate Sig or look in the Functions >> Input palette) and convert the dynamic data output to an array of doubles. You can configure the type of waveform, amplitude, and time period from that express VI as well.
iii. Refer to previous answer.
iv. Index array returns an element of an array based on the index input. You can turn on the context help and move your mouse over functions to get more help on them.
I hope that helps!
Way S.
NI UK Applications Engineer

Loop in combination with Analog output

Hi
I have modified the script thats translate a value in to a static analog output voltage. The value comes from another online running application. The analog output value must remain static until a new value arise. I'm using VB6 and DAQmx 8.5 on a XP computer. The DA converter is NI USB-6211. I have tried to play around with the Start/Stop and clear commands but my script still makes the program highly unstabile.
So am I using the commands correctly?. And have I setup the write commands correctly too. Can anyone allso explain how to use the command Doevent correctly
Dim taskHandle As Long
    Dim clockEdge As Long
    Dim sampsPerCycle As Double
    Dim desiredSampleClockRate As Double
    Dim resultingFrequency As Double
    Dim amplitude As Double
    Dim numSampsPerChannel As Long
    Dim numChannels As Long
    Dim errorCode As Long
    Dim errorString As String
    Dim sampsPerChanWritten As Long
    Dim XICVolt As Double
' Create the DAQmx task.
    Call DAQmxCreateTask("", taskHandle)
    ' Add an analog output channel to the task and check to see whether there is only ONE task.
    Call DAQmxCreateAOVoltageChan(taskHandle, "Dev2/ao0", "aoChannel", "-10", "10", DAQmx_Val_VoltageUnits2_Volts, "")
    Call DAQmxGetTaskNumChans(taskHandle, numChannels)
    If numChannels > 1 Then
        errorCode = -1
        errorString = "Please specify only one channel."
        Err.Raise errorCode, , errorString
    End If
Data_is_recorded:
    If Actualcycles = expectedcycles Then
    GoTo end_script
    Else
    If Actualcycles > lastcycles Then
    DoEvents
     Call DataPoint.GetDataPoint(thenumberOfDataPoint, theXvalue, theYvalue)
        XICVolt = (theYvalue / 10000000#)
    ' Write to the desired channel(s).
    Call DAQmxWriteAnalogF64(taskHandle, 1, True, 10#, _
        DAQmx_Val_GroupByScanNumber, XICVolt, sampsPerChanWritten, ByVal 0&
    Else
     lastcycles = theWF.GetActualNumberOfCycles(sampleIndex, 0)
     End If
    GoTo Data_is_recorded
end_script:
End If
call DAQmx.stopTask(Taskhandle)
call DAQmx.clearTask(taskhandle)
Best regards
Peter

David Weber wrote:
thanks lot for all the great feedback. That's really helpful. I think I'll go for the NO_MERGE hint. A first test with this looks good.Keep in mind, only undocumented hint MATERIALIZE along with subquery factoring clause WITH (for which this hint was created) will work in real queries:
SQL> select my_id as id
2       , my_id as same_id
3 from (select /*+ NO_MERGE */ xxx_test_pkg.get_id(1) as my_id from dual),emp where rownum < 6;
        ID    SAME_ID
        20         20
        21         21
        21         21
        21         21
        21         21
SQL> select my_id as id
2       , my_id as same_id
3 from (select xxx_test_pkg.get_id(1) as my_id from dual where rownum=1),emp where rownum < 6;
        ID    SAME_ID
        22         22
        23         23
        23         23
        23         23
        23         23
SQL> select my_id as id
2       , my_id as same_id
3 from (select /*+ MATERIALIZE */ xxx_test_pkg.get_id(1) as my_id from dual),emp where rownum < 6;
        ID    SAME_ID
        24         25
        26         27
        28         29
        30         31
        32         33
SQL> with t as (select /*+ MATERIALIZE */ xxx_test_pkg.get_id(1) as my_id from dual)
2 select my_id as id
3       , my_id as same_id
4 from t,emp where rownum < 6;
        ID    SAME_ID
        34         34
        34         34
        34         34
        34         34
        34         34
SQL> SY.

PCI Card for Analog output in the range of 10mv

dear ni,
                I want to know about the PCI card that can be generate analog output in the range of maximum 10mv. i am going to use for caliberation of loadcell, strain gauges devices.
could you tell me on which PCI card will support this type of application.
Regards,
Balaji DP

Try: http://www.ni.com/dataacquisition/
These have analog output voltages < 10V:   http://sine.ni.com/nifn/cds/view/main/p/sn/n12:7604,n3:7853/lang/en/nid/1036/ap/daq
You need something with a high bit count to get good resolution at 10 mV, such as the PCI-6010 which has a 16 bit D/A.
Here are the minimum voltage specs for the 6010:
Minimum Voltage Range
-0.2..0.2 V
      Range Accuracy
283 µV
      Range Sensitivity
6.4 µV
Message Edited by vt92 on 11-18-2009 07:56 AM
"There is a God shaped vacuum in the heart of every man which cannot be filled by any created thing, but only by God, the Creator, made known through Jesus." - Blaise Pascal

Error when generating waveform analog output on NI 6704 card

Hi, I am trying to understand why NI 6704 card appears to be incompatible with what I'm trying to do.
I want to use a waveform to generate an analog output voltage on a NI 6704.
I have a vi in the style of the waveform buffer generator in this example:
http://zone.ni.com/devzone/cda/epd/p/id/4837
which creates the waveform. In my main routine I attempt to create and write a DAQmx ao task using the waveform information, but get this error:
Possible reason(s):
Requested value is not a supported value for this property. The property value may be invalid because it conflicts with another property.
Property: SampTimingType
Requested Value: Sample Clock
You Can Select: On Demand
Task Name: _unnamedTask<7D>
According to documentation the 6704 has no onboard memory... but it's not clear to me how the DAQmx functions are actually sending the data to the card, i.e. if they are attempting to read and store the waveform buffer on to the card, it the lack of memory on the card could be my problem. Is is correct that that is part of my problem? Or since the error has to do with the sample timing clock, is my problem that the 6704 uses software timing?
I've run my program successfully on an NI 6225 card... are there any work arounds for generating such an output on a 6704?
Thanks in advance!

The error has everything to do with software timing. Your device does not have a hardware clock so you get an error when you try to configure it. To output a waveform, you have to do out one point at a time. You can only do this at a low frequency and it will have considerable jitter.

Increase output voltage

Hi there
Im usings a NI PXI-6723 with output -10 to +10V
if i wanted 0 - 20 V is it ok to place a +10V powersupply in series to offset the votage? can the card handle the voltage?

Hi Labviewuser3,
The 6723 cannot accept an external reference to adjust the analog output voltage range, as mentioned on page A-6 of the Analog Output Series User Manual. To extend the range you would need to use an external amplification circuit.
-John
John Passiak

How to toggle LED at analog output from my VI Using NI USB 6009

Greetings,
I bought this NI USB 6009 Multifunction I/O and found various uses for it. In my VI, I am acquiring some signals using the DAQ assistant. After doing a couple manipulation I would like to toggle a LED at one of the two Analog outputs available. I tried configure it in Max and was able to toggle it there, but now I would like to have the VI do it once a certain value is attained. Can anyone tell me how this is done as I think I might be doing something incorrect.
Thanks
Edward

Greetings,
Attached you will find just a simple code to turn on the LED if the indicator on the VI's front panel illuminates. In my original code it is something similar. I have also check the wiring and I don't think that's the problem since I was able to toggle it through Max. I am using LV 2009. When the output channel was configured in Max, the output voltage was set to range from 0-5V. I am not sure if the DAQ Assistant analog output is being triggered properly.
OK, Lets say that I wanted to turn on the LED if a number was greater than the one stored in memory. How would I pass that to the NI USB 6009 to turn on a External LED. Please assume that the output is wired properly.
Thanks
Edward
Attachments:
LED Application.vi ‏43 KB

How do I set up a triggered analog output on a USB 6009?

Hi! I am very new to LabView and am working on the control portion of my senior ME design project. It is an anti-tip brake system for a bicycle. The goal is: When critical time to tip is reached (by reading values from a rear wheel normal force sensor, taking the derivative and calculating this critical time), my cheap DAQ USB-6009 device will put out an analog signal to a transistor, which will spin a DC motor (attached to a worm gear setup) for a certain length of time (...This will change a pivot location in the mechanical assembly which will decrease brake mechanical advantage).
I have been trying to work with LabView 8.5. I get bogged down in confusion when I try to use G-code and get unexplained errors in using Express VI's (they're rather black box-ish to me).
I think that all I need to do is set up an analog input channel, take derivatives and values and put them into a formula for critical time. Then if the result is a "True", I want to begin an analog out sequence for a certain period of time (to get the motor to the right position).
I would appreciate any help that I can get with this one.
Attachments:
ABScontrol1.JPG ‏43 KB

chowph,
You are
correct with your last statement about performing a comparison on your data.
1. Are there any error codes or messages in the
errors you are getting? Or if you have screenshots of the errors you could post
then that would work too. Knowing the
errors would help in understanding where to start.
2. In your previous
post did you have a chance to try the examples or Kent’s example code he
posted?
3. What were the results of those examples and
your experiment? Again screenshots would
work fine here.
Since you
new to LabVIEW make sure to take advantage of the online training material and
tutorials we have on ni.com. I have posted
a few that I think may be helpful.
Learn 10 Functions in
NI-DAQmx and Handle 80 Percent of Your Data Acquisition Applications
Complete Data Acquisition
Tutorial
How Can I Learn
LabVIEW?
I hope this helps!!
Message Edited by Ryan N. on 03-31-2008 11:52 AM
Ryan N
National Instruments
Application Engineer
ni.com/support

Usb 6009 output changes

Hi, I'm using a NI USB 6009 device. I am using the analog output to drive very small currents (less than 1 micro Amp) through a 1 MOhm resistor. I find that the output often changes significantly when I begin to acquire data, or if the computer is doing something, such as fitting data, or even if I am simply opening other files or programs. Any advice?
Thanks!
Micah

Hi, thanks for the responses.
I'm outputing a DC voltage with values typically ranging from 0.1 V to 1 V. The signal goes through a 1 MOhm resistor in series with a coil for producing very small magnetic fields applied to an atomic magnetometer. It appears that the output changes by tens of millivolts, as recorded by a yokogawa oscilloscope with input impedance of 1 MOhm. The coil and scope are both grounded. I am using only a single input channel on the USB6009, coming from an SRS voltage preamp with output impedance of 50 Ohms
I can also infer that there are changes in the current when the computer "does something" by looking at the signal in the atomic magnetometer.
Perhaps it would help if I shunted the output with some smaller resistor, say 10kOhm?
I will look at the document you mentioned.
Thanks again.

Usb 6009 multiple analog inputs

I am currently attempting to sample two different analog inputs at different sampling rates using a USB 6009. I keep getting the 'resource reserved' error and am wondering if this is not possible using this DAQ. Questions:
1. Does creating two analog input channels on the device cause this error?
2. Is it possible to sample at different rates on channels created in the same task? (i am trying to 'slow down' the second analog input to display switch points to a customer)
3. Running multiple analog inputs using independent timing would be better achieved by switching to a higher end DAQ? If so which would you recommend?
I have attached my vi. Thank you in advance for your help.
I surf therefore I am....
Attachments:
demo_nolvl.vi ‏27 KB

The DAQ boards only have 1 timing clock for the analog inputs/outputs. So you can only have 1 sample rate on a given card. I would recommend just sampling at the highest of the desired rates in a single task.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions
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USB-6009 pulse train generation with digital output....

Hello!
I've bought a new USB NI-Card (USB-6009) and now I'm trying to adopt an old vi that uses traditional DAQ drivers. I wrote that vi for a PCI NI-Card (PCI-6024E), which has two counters to generate two pulse trains simultaneously. Now I've only one counter and that's why I'm searching for a good way to create pulse trains using a digital output! The pulse trains are both ranging between 100 Hz and 100 kHz.
I'm sure somebody has an idea how I can solve the probem in the best way
Kind regards,
Peter

You can't do it with this low cost board. Both digital and analog outputs are software timed only. The analog out is rated at only 150 samples/sec and the digital is about the same. You can't even use one of the counters because it is not a hardware timed counter output. It is an event counter only as an input.

Usb-6009 analog output voltage

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