Measure like the testpanel of the USB-6008

Hello,
I want to measure like the testpanel of the USB-6008. What is the right
example of the nidaq installation or what are the necessary c-functions?
The most c-examples quits with an error. So I don`t no what is the right. I searched in the dictionary "Analog In".
Thx Pellaeon

Hello,
you can find all examples for DAQ in C:\Programme\National Instruments\NI-DAQ\Examples\DAQmx ANSI C\Analog In\Measure Voltage.
Do not forget adding the include file and the library file to your project. That is described under NI-DAQmx C Reference Help. You can find this under Start->Programs->National Instruments->NI-DAQ-> NI-DAQmx C Reference Help and there under Getting Started--> ANSI C
USB-6008 is supported in NI-DAQmx 7.5 or NI-DAQmx Base. http://digital.ni.com/public.nsf/websearch/4D915A820A76823C862570390075EBF5?OpenDocument
regards
Peter K.
National Instruments

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Drive higer load with the usb 6008

Hi all,
I need to drive a small motor with the analog output of the usb6008 device ... connecting it directly doesn't seem to work.
Any suggestions how get it working??? what does the 6008 output?
My motor works on a AAA battery dricetly.
Thanks a lot

On Apr 23, 12:40 am, lav21 <[email protected]> wrote:
> Hi all,
>  
> I need to drive a small motor with the analog output of the usb6008 device ... connecting it directly doesn't seem to work.
>  
> Any suggestions how get it working??? what does the 6008 output?
>  
> My motor works on a AAA battery dricetly.
>  
> Thanks a lot
The analog outputs of the USB-6008 are only rated at 5 Milliamps per
channel. One suggestion for getting it to work is to use an emitter
follower to get more current to drive your motor.
Howard

Input Capacitance of the USB 6008

Does anybody know the input capacitance of the NI USB 6008? Im creating a circuit that mimics a 10x probe whose design requires the value of the "oscilloscope" input capacitance, or in this case, the USB 6008 input capacitance.
Thanks so much!

With the low input resistance (144 kohms) the capacitance does not matter much. Any realistic value of input capacitance will have a time constant shorter than is meaningful for the device bandwidth.
Also note that the input impedance is terminated in about 1.4 V. See the circuit in Figure 7 of the User Manual.
Lynn

Download just the USB-6008 driver (DAQmx) ?

Hi
Is there a way to download only the driver for my USB-6008 application
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Hello Daniel,
When you install NI-DAQ, you are given the option to include support for multiple software programming environments, and MAX as well. You do need to install MAX and support for the API that you will be using, like LabVIEW 7.1 for example, but you can choose not to install support for everything else, like LabVIEW 7.0, CVI/LabWindows, .NET, etc.
-Alan A.

Seperate channels from the usb 6008

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Im sorry if this sounds confusing, I'm confused by it too.

Hi!
I may be wrong but you can create two separate tasks.
The limit is that they cannot run at the same time.
Depending on the application, the use of two tasks or a single "acquire all" approach can be the best option.
Regards,
Marco

Is the USB-6008 controllable by Mathcad?

Can I use Mathcad calculation power to manipolate analog data converted
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If yes, please indicate examples sources (if any).
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Hi nonnog,
I don't understand very well what you want to do, but you have 3 possibilities:
if you have Labview you can acquire data from NI device and then you can use MathCad via ActiveX with Labview with the specific libraries downloadable at link: http://venus.ni.com/stage/we/niepd_web_display.DISPLAY_EPD4?p_answer=&p_guid=B799BC00B8835510E034080...
if you haven't Labview, you can acquire and save data from NI-USB device with 2 NI software ("VI Logger Lite" or "NI Data Logger" provided at no charge with driver) and then you can read these files from MathCad
if MathCad provides the possibility to create Macro or to call dll you can directly use driver functions to acquire data from the NI-USB device.
I hope this helps you.
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Calibration cert for USB-6008

It doesn't look like the USB-6008 is supported by the basic calibration certificate generator. I need calibration certificates for several of these units to meet ISO 9001 requirements. What do you recommend?
Thanks,
Treck

My response did not post everything I typed. Like Brian mentioned you could probably get a calibration center to calibrate the device and give you a certificate. I also meant to say those devices would be good alternatives. So your choices would be to look for a calibration center that would do it for you, or to get a higher end DAQ device. Sorry for the brief and unexplanatory post from before.
Have a great day,
Michael D

Will USB-6008 DAQ be able to power and record voltage for UMS T5 tensiometer at the same time?

I would like to use my NI USB-6008 to provide power to my UMS T5 tensiometer (http://www.ums-muc.de/en/products/tensiometer/t5.html) as well as take readings from it, but I don't know if this is possible to do properly. The supply voltage for the instrument can be as low as 5V, which I can easily get from the dedicated +5V channel. I am able to power the instrument and connect it to an analog input on the 6008 and measure a voltage in differential mode. However, while reading the support literature for the instrument, I find the following:
"Potential data acquisition pitfalls: Because the pressure transducer is configured in a Wheatstone full bridge, the input voltage and signal mV output cannot be connected to the same reference (ground). Hence, the signal mV output can only be measured using a differential voltage measurement. Therefore, do not attempt to make a single-ended measurement of the pressure transducer mV output." (http://www.decagon.com/assets/Uploads/MeasuringUMSTensiometerswithnon-UMSControlandDataAcquisitionSystems.pdf)
My understanding is that the 6008 can take a differential measurement if I attach the signal "+" and signal "-" to the positive and negative analog input terminals. However, it seems that all of the Ground ports on the 6008 are grounded to the same reference, which would make my voltage measurement invalid according to the paragraph above. So my real questions is: if I attempt to record the voltage using one of the analog inputs on the 6008 in this way, is the measurement valid? Or do I need to find a separate power supply with a different reference ground to ensure that the measurement is accurate?

The specification sheet for that device is very poor. The manual is not much better. Companies which want to sell scientific equipment should publish decent data sheets or get out of business.
In section 3.4.3 General requirements the device is described as a "non-amplified bridge circuit." This information along with the bridge impedance should be in the specifications because it is essential to applying the device under any circumstances other than the nominal behavior at 10.6 V.
The answer to your question is this:
You can use it with the USB-6008. The 5 V power supply will result in output voltages slightly less than half (5/10.6) the voltages specified under nominal conditions. You can use the differential input mode on the USB-6008. The absolute input voltages will be about 2.5 V with the 5 V supply. That voltage is within the working range of the device. The differences will probably be less than 100 mV. The resolution of the USB-6008 on the +/-1 V range is about 0.5 mV so your pressure resolution will be around 1 % of full scale. The input impedance and termination voltage of the USB-6008 will introduce some errors. These may be on the order of 5-10%. I cannot predict much better without the missing bridge impedance specification. Those errors should be systematic and relatively constant. A calibration of the whole system - sensor and DAQ device together should allow you to compensate for much of that error.
Lynn

Simulated device capability for the NI USB-6008

I noticed that Nidaq 8.3, does not have simulated device
capability for the NI USB-6008. Is there any way of simulating
this device?
Thanks

Hello mmac,
Unfortunately, there is no way to simulate the USB-6008. If you would like to see this functionality in a future revision of NI-DAQmx, I would encourage you to go to the Product Suggestion Center and submit a product suggestion. R&D considers these suggestions when deciding on new features for development.
Best regards,

Temperature measurement usb 6008 with Thermocouple

Hi,
I am trying to measure temperature with type k thermocouple on USB 6008. I set max for measuring voltage, and got 0 voltage with noise. It would be appreciated if you can help me to wire up properly.
Cheers,

Hi,
You are doing the right thing by acquiring your thermocouple data as a voltage. From there, you can convert it to temperature data after the acquisition.
There are two configurations that you can use to connect your thermocouple to the USB device: Differential and Reference Single Ended (RSE). If you use differential, then you would connect one wire to the + channel and the other wire to the - channel. For example, to use AI 0, you would make connections to AI0 (+) and AI4 (-). If you use RSE mode, then you would connect one wire to an analog input channel and the other wire to ground. So for AI0, you would connect the + to AI0 and the - to ground.
More information about these connections is available in the USB 6008/6009 User Guide. Also, here are two links about the different types of configurations you can use as well as thermocouple polarity:
Field Wiring and Noise Considerations for Analog Signals
How Can I Determine What Kind of Thermocouple I Have and the Correct Polarity of Signal Connections ...
Regards,
Hal L.

Can this damage the USB ports of my iMac?

I was inserting a USB into the port in the back of the iMac, and when it was inserted, it didn't look like the USB went in all the way... (I could see part of the USB sticking out a bit... I'm not used to this because my old Windows laptop didn't let them stick out). So, I tried pushing the USB in further, but it didn't go any further in, at which point I realized the USB was already in all the way.
Am I just being paranoid? Or could pushing the USB in too hard potentially damage the computer or the USB port?

If you really tried I am sure you could damage the computer but if it still works don't worry about it.

I have LabView Student Edition, how can I make work a USB 6008?

The Student edition it doesnot have many Vi's that there are necesary to work with a USB 6008, I would like to know how can I make work the Usb 6008 with LabView Student Edition

Hello Jorge,
When you say "NI-DAQmx configuration" do you mean the NI-DAQmx Base Configuration Utility? Are you using NI-DAQmx or NI-DAQmx Base to communicate with the 6008?
NI-DAQmx 7.5 added support for the USB-6008. Therefore, you can use either NI-DAQmx or NI-DAQmx Base to control this device. Make sure that you are setting the USB-6008 to NI-DAQmx before trying to use the NI-DAQmx VIs in LabVIEW. To do this, Open Measurement and Automation Explorer (MAX) and select Tools >> NI-DAQmx Configuration >> NI-DAQmx USB Driver Selector. Your USB-6008 should appear in this window, indicating which driver your device is configured for. Make sure it is set to NI-DAQmx before trying to use the NI-DAQmx VIs.
When your 6008 is set to NI-DAQmx, you cannot use NI-DAQmx Base or any of the DAQmx Base examples. Likewise, when the 6008 is set to NI-DAQmx Base, you cannot use any NI-DAQmx VIs.
If you would like to use NI-DAQmx with your USB-6008, please set the driver by following the steps above and verify that "USB-6008" is listed under "Devices and Interfaces >> NI-DAQmx Devices" in MAX.
I hope this helps. Please let me know if you continue having trouble with your USB-6008.
Regards,
Sean C.

Error -10401 occurred at AI Group Config - in relation to USB-6008

I'm attempting to run a simple vi that uses AI Aquire Waveforms.vi to input voltage data that I have coming in from the USB-6008 DAQ. However, when I try running the program, I receive the error:
Error -10401 occurred at AI Group Config
Possible reason(s):
NI-DAQ LV: The specified device is not a National Instruments product, the driver does not support the device (for example, the driver was released before the device was supported), or the device has not been configured using the Measurement & Automation Explorer.
And I'm not sure how to fix it. In MAX, the device seems to be working properly and everyhting seems to work fine in the test panel, so I'm slightly at a loss. I'm running Labview 7.1, and installed NI-DAQmx 7.5 which came with the USB-6008.

Never mind. I'm new to Labview, and didn't realize that I could not use the traditonal Data Aquisition components with the USB-5008 (I didn't even realize that NI-Daqmx was different).

Using USB-6008 software timimg Generate waveform

I am using USB-6008 device. Base on it's User Guide, this device on support software-timed and maximum update rate is 150 Hz.
By place a time delay VI for 1ms, I have a 1.660Hz sine signal. Is this wrong for place a time delay VI for software timing?
I would like to generate a 60 Hz signal by using software-timed VI on USB-6008 device. How should I do?
Thanks a lot.

DephinTW,
The update speed of the USB-6008 is largely dependent on the speed of
you computer as well as anything else on your USB bus. If you are using
an older computer or have other USB devices on the bus, you may not
achieve this rate. In order to output a 60Hz signal, the minimum output
sampling rate is 120Hz. This corresponds to an 8.3 msec. delay between
samples. Instead of using the "Wait" VI, you should try using the "Wait
Until Next ms Multiple" VI. Place this in parallel with your
generation. This will synchronize the output with multiples of the PC
clock, rather than waiting for a fixed amount of time, irrespective of
code and USB overhead.
Hope this helps,
Ryan V.
National Instruments
Ryan Verret
Product Marketing Engineer
Signal Generators
National Instruments

Reading an encoder with a USB 6008

Hello DAQmx users,
I have a USB 6008 and it doesn't work the way I want it to. I have done no troubleshooting or research and I refuse to give you any more information. You have 30 seconds to answer my question. i kid, i kid...
So here is my real question:
I have a USB 6008 that we use to do simple analog output. I'm looking for a way to use the USB 6008 to also get encoder information. I know that the USB 6008 cannot read an encoder directly, but I was wondering if anyone knew of or had any ideas of external hardware that could be used inbetween the 6008 and the encoder. I think it would be something like 1) the encoder generates pulses 2) external hardware takes encoder pulses, translates them into a digital value representing the angle and outputs this digital value 3) use the digital lines on the 6008 to read in the digital angle value from the external hardware 4) I don't lose my job.
I realize that this isn't an easy, optimal, or preferred solution, but I want to look into it before being forced to replace the USB 6008 with another piece of hardware.
Eric
DE For Life!

Oops.. Just realized that this got posted in the Motion Control Forums... Meant for it to go in the MIO forums. Sorry!
New thread is here, feel free to respond!
Message Edited by e-Cash-Money on 03-17-2006 04:30 PM
Eric
DE For Life!

Measure like the testpanel of the USB-6008

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