NEITHER USB-6008 and Linux Comedi compatibility

Similar Questions

• NEITHER USB-6008 connect to thermocuples and pressure sensors, control valve

  I am endevoring to build a gasification plant biomass for bench scale test process control plans. NEITHER USB-6008/6009 will be adapted for use as a data acquisition. I'll take RTDS, thermocouples and pressure sensors. I don't want to use industrial automation controllers.  It is also possible to use the channel of analog output for sending signals to a control valve position (using sufficient current/voltage between the two drivers).

  (1) OK.  I just wanted to be sure that you were aware of the potential dangers.

  (2) an RTD is a resistance that has small changes in resistance per degree of temperature change. To measure that you have need of a current source and a sufficient resolution in order to detect small changes.  At 25 degrees C a typical RTD is 109,73 ohms and resistance ohms 0.38 per degree changes.  If you had 1 my crossing this RTD voltage through it would be 109,7 mV and the voltage change of 0.38 mV by degree.

  The resolution of the 6008 on the most sensitive range is 0.49 mV > 1 degree.  The accuracy of the 6008 is 1.5 mV typical.

  For a Type K thermocouple, voltage at 25 degrees is 1.407 mV and change by degree is 39 µV.  Millivolt solving half of the 6008 translates into about 12 degrees.

  If you need a source of excitement for RTD and a kind of amplification for thermocouples and RTD before she would make any sense to try to use USB-6008.

  (3) I have not used anything except LabVIEW with DAQ devices and drivers.  I think DAQmx can be used with MATLAB and other languages.

  (4) the 6008 is the low range made by NOR. You will need to go to a more expensive camera or add signals conditioning circuits.  Talk to your representative OR assistance in the choice of a suitable device.

  Lynn

• NEITHER USB 6008 voltage offset using CSR and measurement of diff.

  Hi all

  I am currently trying the NI USB 6008 housing and I'm getting problems when reading voltage analog using CSR or differential.

  So basically, what I want to measure is a PWM signal (0 to 12V), which is divided by a divisor of tension (by two). But instead of measured 0V and 6V

  I am in a position a constant 0.8V and approximately 3V.

  On the side of digital data acquisition, I give you on impulses for the SSR... and it works fine.

  I connect it that way: http://digital.ni.com/public.nsf/allkb/95CC0CB11D7DF3D18625712E000C4ABD?OpenDocument

  Would apreciate any help

  Best regards

  EDIT: Attached graphics acquired are

  What is the impedance of your voltage divider?  The input of the USB-6008 impedance is not very high. If the impedance of the partition is large, it could cause the effect you see.

  Lynn

• NEITHER USB 6008

  Dear all!

  I'm looking for help on the NI USB-6008 case. I'm putting in place 4 K thermocouples using this USB-6008 4-channels. I made an express VI in the Labview 8.5 and I have installed all these 4 channels in this VI. The VI is attached for your review!  Come to the problem! I get strange readings of these 4 channels even if I have no thermocouple connected to the terminals with respect to this USB-6008. Please help me and explain what is happening? Why am I getting these strange temperature readings while there is no connected thermocouple?

  Greetings to all!

  Tajim

  Dear all,

  I'm sorry for not attaching the screenshot of this configuration! Here, it's this time!

  Kind regards!

  Tajim

• NEITHER USB-6008 can measure an AC voltage

  Now I am doing a project, but don't know if DAQ can measure an AC voltage or not, the acquisition of data that we use is USB-6008.

  Yes, it can measure AC in the range of +/-10 volts and have a sampling rate of 10kS/s.

  Application engineer OR

• NOR-USB 6008 and Red Lion Cub5

  I have a USB-6008 attached to an AXL32 chip for recording of analog voltage and want to add a Red Lion Cub5 counter to display the number of the sample.  I want my labview program to drive the coutner via digital output, so that I can see what sample of data occurs.  There is a setting TTL on the Cub5, but I can't seem to increment the meter through the test DAQmax Panel.

  Troy,

  I'm glad to hear you got everything and functional. I suggest you mark a message as accepted solution so that other people can find solutions to a problem easier. Thank you.

• NEITHER USB 6008 OEM DEATH

  Hello

  I have a problem with some NI USB 6008 OEM.

  They do not work! I have attached to my PC and the light starts flashing, Windows detects new hardware and everything's fine (the same way it usually works with the regular OEM-NIUSB6008 Board, not).

  Suddunly led turns OFF, and the jury never come back to life again. I run the MeasurementStudio, and I see the boards with a red cross or without serial number (when they are shown as if they were present in the system).

  I bought 10 boards and I don't want to try with anyone, because I don't know what is happening and I don't want to kill them all :-(

  We have developed some equipment with regular tips and there is no problem... What is the mystery with the OEM ones?

  Help, please.

  Thank you!!

  Hi Luciano,

  Thanks for your response and documentation on the flashing led behavior. It helped me a lot to know that if the led is flashing, it could be because it is not properly initialized.

  In fact, I had the 8.1 DAQmx version installed on my PC that worked perfectly well with regular advice to the NI USB-6008 (boxed version).

  When I plugged the OEM boards, the system seemed to load the drivers and then a message pops up saying "your device is ready to use", but as you know when I opened MAX he didn't have a serial number, or sometimes, he appeared with a red cross.

  So, I downloaded a newer driver: DAQmx 8.8. ... I installed it on my PC (first remove DAQmx8.1) and it worked

  So, the problem is solved! The problem was, I think, because of the bad initialization of the device. The problem is solved by installing a DAQmx 8.8 version. It works very well with regular and USB-6008 OEM boards.

• USB-6008 and XP64bits?

  Hi all

  I just received a unit NI USB-6008.

  From the data collected on the site, I understand that the there is no support for Windows XP 64-bit operation.

  Is this fair?

  Is it possible to do?

  Any help is welcome.

  I thankt you very much

  Best regards

  Hello

  The DAQmx driver is not compatible with Windows XP 64. You can find more information here:

  What are the National Instruments products compatible with the operating system to 64-bit Windows XP x 64?

  NOR-DAQmx under Win XP - 64

  Kind regards

• NEITHER USB 6008 tension problem reading

  Hello

  I am trying to program a USB-6008 on a mac. When I connect to the input to analog 5V output I get a reading of 3.67volts, while on an osscilascope, I read a 5volts voltage. Is this normal? Need to load resistors? Also, I get the same effect with the release of tensions for the analog output.

  Hi Zepp2,

  Thanks for your post. The pins are you connect together on your device? Depending on the type of connection you have the wiring may not be quite right.

  I found a few documents online which hopefully should help you:

  Field of connection for analog signals: http://zone.ni.com/devzone/cda/tut/p/id/3344

  USB-6008/6009 Getting incorrect voltage reading: http://digital.ni.com/public.nsf/allkb/95CC0CB11D7DF3D18625712E000C4ABD?OpenDocument

  Input analog USB-6008/6009 reads about - 1.4V Offset: http://digital.ni.com/public.nsf/websearch/E687933C5694AB00862570BD00593CA3?OpenDocument

  Please let me know if one of them will help out you.

  Kind regards

• NEITHER USB-6008 outputs in series to generate 10 V

  We wonder if it is possible to connect the AO0 the AO1 as a series voltage source that generates 5 + 5 Volts?

  The datasheet is not say, do or not, but he says they are independent.

  Worst case being short, one of the outputs short-circuit if the ground is common?

  http://forums.NI.com/T5/Multifunction-DAQ/how-to-combine-two-analog-output-voltage-from-USB-6008/TD-...

• NEITHER USB 6008 help to order 3 relays.

  Hello! I have a DAQ 6008, and I need to control the three relays for the filming of lights, so I scored a VI to activate the relay through three buttons. My problem is that I don't really know what kind of relay that I need. I need something like 5VDC to 230VAC. What do you recommend?

  You will need a driver-relay or transistor to provide current to fly this relay.

  On a datasheet for the relay, tried google?  The part number printed on the side of the relay.

  The ULN2003A is a good relay driver.  A 2N4400 transistor will do the job too.  Both are very easy to connect.

• NEITHER USB 6008 AI acquisition and generation of pulse

  Dear users of LabVIEW,

  Greetings for everyone. I am a beginner of LabVIEW and I have a problem that I solved partially. I would really appreciate your help and suggestions that I searched for days without a bit of luck. The problem is as follows:

  I am the acquisition of tension HAVE (continue) 4 to 8 accelerometers. In the meantime, I send you a digital output signal each time when you click on the sampling frequency (i.e. 1000, 2000, 3000,...) If the sampling rate is 1000). In other words, try to send a signal of output digital (at a frequency n Hz) at intervals of 1 second (depending on the material). To make the digital output signal begins to blink a LED every one second. In addition, I need to write signals (voltage) AI and the LED blink timestamps PC (software) separately. All stages of the above are followed in my .vi program, but the real hardware/software level operations kill my timestamps. In other words each LED flash timestamps are not accurate, when I use LabVIEW measurement file express VI (the difference is not at least to the third decimal). In addition, the timestamp is kinda OK when I disable the file LVM write VI. Onemore thing I've noticed is that physically the LED blinks every second two times, I feel it's because of the shift register and loop delay of a second. Is there a way to control the speed of blinking (i.e. Boolean State must change to every 500ms without delaying the inside while loop).

  Results and comments:

  LabVIEW 2011 .vi, timestamp of files with or without generator of LVM (express VI) files are all attached. Please note that there is a considerable amount of drift in the consecutive timestamps when the file LVM generator is used, on the other hand there are derivative of 0.001 ms when the file LVM generator does not. The reason for horodateurs PC have is about aligning the various measures or observations or events to global time scale.

  Please give me any suggestions or help me do at least accurate to milliseconds in VI of witten. Finally, is there any USB DAQ module relatively inexpensive which allows to send an impulse to directly from channel impulse of output digital channels when the "n" sampling frequency Hz is obtained by level of material which could all be accurate, so that the software timer is completely reduced to a minimum. Although there are very material sophistiated of NOR, but our goal of this project is to build and test the system profitable.

  Thank you and I really appreciate your time and effort inavluable. Have a great weekend!

  Just change the samples to the constant playback at the entrance of the DAQmx Read.vi from 1000 to 500.

  Lynn

• USB-6001 and linux

  Hi all

  I have a NI USB-6001 DAQ device that I'm doing work on linux. My distro is opensuse 13.1, and I am using nor-daqmx base 14 to talk to the device. After much bother that I have finally made was get the drivers installed, however I am not having any chance to communicate with the device. The output of dmesg shows that the device is connected and recognized, however the output of lsdaq does not list the device at all as you can see below.
  For the device user's guide suggests that it is supported by NEITHER-DAQmx 9.9 and later it is true that the doc is written from the point of view centered on mswindows, so I
  hope that this applies also for linux.

  If someone managed to get this device working under linux? If not, can anyone think why it is not detected?

  Thanks for any help

  > dmesg
  ...
  [1,605963] usb 3-14: new USB full speed number 4 from the device using xhci_hcd
  [1,617849] usb 3-14: new USB drive found, idVendor = 3923, idProduct = 76bf
  [1,617851] usb 3-14: new USB device strings: Mfr = 1, product = 2, SerialNumber = 3
  [1,617852] usb 3-14: product: USB-6001
  [1,617853] usb 3-14: manufacturer: National Instruments
  ...

  > lsdaq
  --------------------------------
  Detect of National Instruments DAQ devices
  Find the following materials:
  --------------------------------

  > uname - r
  3.11.10 - 25-Desktop

  > lsmod | grep ^ or
  663726 1 nimxdfk
  322143 1 nipxirmk
  441753 2 nipxirmk nidimk
  3 524901 nimxdfk nimdbgk, nipxirmk
  4 141747 nimxdfk niorbk, nipxirmk, nidimk, nimdbgk
  nipalk 1193476 8 NiViPciK, nimxdfk, nipxirmk, nidimk, nimdbgk, niorbk
  Nation 113161 6 nimxdfk, nipxirmk, nidimk, nimdbgk, niorbk, nipalk

  It is not listed in the Readme as being supported.

• NEITHER Fbus Configurator and Windows 7 compatibility

  Will be that neither FBUS Configurator 3.2.0 works with Windows 7?  If not, is there a way to upgrade? We use an NI FBUS PCI card.

  If an upgrade is required, it is a software or hardware or both that is upgraded?  What is the cost of upgrade?

  Configurator 3.2.x does not support Windows 7. You can upgrade to 4.0.1 Configurator. Only the software requires updating.

  The cost of the upgrade is much lower than the purchase of a new license. For more information, please contact your representative local OR.

• Measurement computing USB-6008 and USB-1208FS and 6009