Measurement of temperature using NI USB-6343

Similar Questions

• Measurement of temperature using Iex thermistor with PCI-6259

  Hi all

  I have I encounter some difficulties to measure the temperature using MAX with the installation of the thermistor Iex and would like to know if I missed something important. I use external current thermistor excited with 2 ladders and card PCI-6259 with MAX.

  This is a channel that was originally set to measure voltage and MAX approx. 900mV since this channel, OK, the voltage converted temperature is about 30 ° C. Then I added a new channel and configured to measure the temperature directly with default installation MAX Iex thermistor. This is so the problem appears: I'll get a constant-273 C instead of 30 C as expected by operating the canal in MAX. I must have done something wrong here.

  Your help is greatly appreciated!

  Bryan

  We discovered that the problem came from our wiring to thermistor does NOT of installation. If Differencial has been used, the conversion of MAX worked well. If this is not the case, only directly blood pressure will work.  Bryan

• (Thermocouple, - k-type) measurement of temperature using Keithley DMM 2000 and 2001 scan GPIB interface card

  Mr President.

  I am a beginner in Labview and urgent I need a labview for keithley program 2001 scan card measuring temperature thermocouple with GPIB interface and keithley 2000 DMM...

  Any body please help me...

  Thanks in advance

  Shan...

  Hello

  Open the keithley 2000 and in the lvlib project in public, you will find the tree.vi.

  Inside is a configuration vi for themocouple measures

  extend the case in the example simple reading if this is used (also extend selection) and see what happens.

• Sample USB - 6343 Counter clock

  I use a USB-6343 CTR0 to measure the angular position. I expect to ~ 1 million encoder pulses (or account) per second. What USB-6343 clock signal would be preferable to use the counter sample clock?

  Dar Hi,.

  At what resolution do you need measure the angle?

  One of my colleagues has compared the maximum sampling frequency on the counters of series X USB to be approximately 8 MHz for a single channel, continuous operation for 10 minutes.  However, if the signal that you intend only generates pulses at 1 MHz, 8 MHz rate seems unnecessary because you will receive the same reading several times.

  Concerning the two methods you mentioned, either would not be possible:

  (1) you could count the external signal and sample at regular intervals.  For example, if 10 kHz sampling you'd expect to see ~ 100 strokes per sample if clock signal is 1 MHz.

  (2) you can also use the meter to count a time base internally (for example 100 MHz) and the sample out of your external signal.  Thus, during a period of your external signal, you expect to see 100 graduations of the time base.

  It seems that what you're trying to do is to measure the frequency of your encoder at regular intervals.  To do this, I suggest you actually a variant 3.  X series cards support a measure of frequency clocked for example (see the X Series user manual).  The card has two occurrences of the external signal as well as occurrences of the internal time base known and uses it to determine the frequency.  The one caveat is that the signal you are measuring the encoder must be at least two times faster than the sample clock signal.  I suggest to use Freq Out or another counter to generate the sample clock.

  Best regards

• synchronize the outputs digital AND digital NI USB 6343 entry

  Hello

  I use NI USB 6343 to fly 1 TTL devices. This device can also produce a TTL signal to indicate if the door is opened/closed.

  I use digital Bool 1 line 1 Point. I was able to reverse the opening/closing of the door on time. But I would like to synchronize the DI and DO it right.

  I tried to throw in the clock aboard, but he failed.

  Is it possible to synchronize the DI and DOI onbaord/hardware clock?

  Any idea will be great!

  Thank you!!

  Hello

  Synchronization of your tasks of DI and shouldn't be possible with your device. You'll need them timeless has a clock that is usable by both. This information is available in the X series user manual

  http://www.NI.com/PDF/manuals/370784f.PDF
  PG 6-9 and 6-13

  You can also find information and examples of synchronization of the various tasks in the article below.
  http://www.NI.com/product-documentation/4322/en/

  Good luck

  Eric

• How to make accurate measurements at high impedance using NI USB DAQ 6343 in Labview

  Hello.  I use a DAQ 6343 for measurement of analog voltage on a signal of high impedance.  I am aware that low impedance is recommended, but it is what is on my Board.  I tried to measure several times to an A/D channel only, increasing the number of samples, sample rate reduction, and I find significant variations in all of the measures.

  I wonder what is the best way to stabilize the A/D before taking a step on the way to analog input?

  Thanks in advance for your help.

  Jodi

  Hi jschwatz100,

  Here is a good link on ghost image, which talks about solutions for playback of a signal from a high impedance source:

  http://digital.NI.com/public.nsf/allkb/73CB0FB296814E2286256FFD00028DDF?OpenDocument

  I would recommend a circuit follower of simple tension of construction as a buffer between your signal source and data acquisition. Here is a Wikipedia article about it:

  http://en.Wikipedia.org/wiki/Buffer_amplifier

  I also recommend to maintain a ratio of 10:1 for your sample rate: Buffer Size(N Samples in Continuous Mode) and lowering/raising them both the same way.

  DylanC

• NEITHER USB-6343: erratic low frequency 1 counter measures

  Dear members,

  I'm looking for help with a measure of low frequency counter.  I tried to make it work for a week or two, but I keep getting erratic measures.  It will read the rpm properly for a second or two and then it will give a ridiculous value on the order of 10,000 times the correct value. I can not get a constant value.

  I use a DAQ series X NI USB-6343 multifunction with Geartooth Honeywell GTN1A111 sensor. I enclose a sketch of the wiring configuration.  I think that it is correct.  Sensor output to the door of the meter.

  To try to solve this problem, I hooked the sensor to an analog input channel to make sure that I was getting a TTL signal by sensor.  I noticed every once in a while I'd see a glitch of little noise in the signal and I guess that's what is causing my problem with the meter.  I inserted two waveforms of the sensor signal (one with the clean signal) and the other with the glitch of noise.  My understanding of a TTL signal meter channel will examine LO voltage when it is below 0.8V and HI when it is larger than 3.8V.  So I really do not understand why these little glitches could be the cause of the problem because they are well below and above 0.8V and 3.8V, respectively.  I think that the noise comes from a frequency converter used to drive the engine.  I tried the system as much as possible of the Earth.

  

  

  I guess I'm looking for another approach.  I could potentially use a digital filter to help with noise? The glitch is in fact the problem or I forgot something.  The VI in question is attached.

  Thanks in advance,

  Mike

  Have you tried to set up a digital filter yet?  Obviously the seeds are collected as an additional transition (the method of low frequency counter 1 measure the period and then reverse, so a short glitch would record as a very high frequency).

  You can enable the digital filter with the following property node:

  

  Min pulse width is guaranteed pulse past the filter, so it should be low enough for the real signal is guaranteed to pass through (but high enough so that the glitch is always rejected).

  Best regards

• Frequency counter measurement crashes when you're away point zero (NI USB 6343, error-200284)

  Members of the Forum,

  I have problems with a measure of the frequency on a DAQ Mulitfunction of NI USB 6343 X series.  I use the meter 1 (door axis for frequency signal, PIN to DGND 82 77). The couple HBM T10F flange that I use (powered by a power supply of 24V) emits a signal of frequency between 5000 and 15000Hz with 10000Hz being the zero point. Couple flange has a capacity of 5kN.m (15000Hz = 5kN.m; 5000Hz = - 5kN.m).

  I have been using the VI attached for a few months now without any problems.  Now, the VI works fine as long as the couple remains inside a few hundred Hz of the zero point.  However, when the frequency increases further reading couple begins to freeze and finally I get either of these two errors:-200279 or-200284 related samples is not not available.  I noticed that the light on data acquisition close compromise during these periods of frost.

  Here is an example step by step my problem using cal shunt of the flange of the couple:

  1. I have run the VI and couple bed properly around 10000HZ (Active light, indicator light ON)

  2. I have apply the excitation of 5V to the shunt cal and frequency climbs to about 50% of the ability to couple brackets (as it should)

  3. as soon as I remove the excitement 5V playback freezes and the light on the acquisition of data.

  4 if I apply the 5V once again, until the timeput occurs, the led turns on and the acquisition of data reads the signal correctly.

  This type of problem would be more DAQ-related or is it the flange of the couple itself.

  Thanks in advance,

  Mike

  Solved.

  I did some troubleshooting this morning and it turns out that the vibrations of the system had not tightened a screw that was connector to the stator flange torque causing a bad electric signal of the torque flange itself.

  Everything works fine again.

  -MB

• Simple examples of analog output USB-6343

  I've tried passing by 'find' examples and does not know how to find what I want.

  I'm doing a simple analog output on a USB-6343.  Examples of waveforms say they work with the USB-6343, but I really don't want a waveform, just analog of output does not exceed 10 Hz speed of renewal.  Some of the more simple examples show that they work with the pcie-6343 but do not list USB-6343.

  I worked with USB-6009 in the past, but when I try to use an analog output task that uses 1 sample on request, I get the error "not buffered operations clocked by the hardware are not supported for device and channel type.»  Set the size of greater than 0 buffer, do not set up the timing of the sample clock or the value Type of sample On Demand time"

  I tried samples N, 100 samples to write to 10 Hz - the same error.  Samples of continuous - same error.  1-sample - timed HW - same error.

  There is a series of examples of I/O for the X series?  Is it possible to search the device examples rather than go through all the examples and by checking the list of devices individually?

  Is 'size of the buffer' the 'writing samples"in MAX?

  After contacting the support I was provided with the names of the more simple examples for analog i/o:

  Analog output-Gen power Update.vi

  Analog Input-Acq & chart voltage-Int Clk.vi

  They are found in the getting started screen of

  Click 'Find examples' near the lower right corner

  Filter the results to material by clicking on the menu drop down for the material in the lower left corner and selecting USB-6343 (only connected equipment will be displayed)

  Don't forget to check the box "limit results to material" below.

  In the center pane, double-click 'Material Input and Output'

  Double-click DAQmx

  Path for the analog input - double-click Acq & chart analog measures - double click on tension - tension-Int Clk.vi

  Double click on analog generation - double click on Power - Gen Update.vi of analog channel output voltage

  The examples are for the single data point.  Samples and exit multiples are produced by putting the writing or reading VI inside a loop.  The beginning and the clear functions should be out of the loop.

  Additional information, I need technical support was how material-filter results and identification of more simple examples which were not obvious from the examples of names.

• Satellite 1800-814: how to measure the temperature of the processor?

  I replaced the radiator component on my laptop as it freezes suddenly during the operation. Now everything seems to be better, but still a last question. How to measure the temperature of the processor?

  Dominic displays only HDD temp and MBM profile for 1800-224 display cases and the cpu. But if I can use this profile? Any other ideas how to meausre CPU temp?

  MBM shows me around 40 to 49 ° C for the cpu. Is this normal or too high just to run windows?

  Thanks in advance

  Greetings
  Jens Grieger

  Hello

  See this http://forums.computers.toshiba-europe.com/forums/thread.jspa?threadID=5564&messageID=19417

  Maybe the help!

• Trouble using NI USB-4065 with virtual machine VMWare

  Hello

  I'll be working with a virtual machine (windows xp) and I need to use an NI USB-4065 DMM.

  When I connect the USB-4065 to the PC, the virtual windows xp recognizes the new HW and also MAX display the new device on the list DAQmx.

  It seems ok, but if I try to use the USB-4065 (open the soft cover or in a LabView VI), the device does not work.

  If I use the frontpanel app, when I click a botton, the Group seems to work but doesn't measure anything; If I try to reboot the softpanel, it works and 'freeze' of the screen.

  If I use LabView, the VI returns an error on a maximum duration of the measure.

  I'm trying to use the device on the real machine (not with VMware) USB-4065 works, whith flexible Panel and whith VI.

  I update the driver of the DMM on the virtual machine, beats the device still doesn't work.

  ... I don't have any other idea, can anyone help me with this problem?

  Thanks, SEM.

  Hi John,.

  This isn't good news for my project but peronny for more information.

  You see, by SEM.

• Multitask acquisition using NI USB 4432

  Hello

  Is it possible to perform tasks DAQ of tension HAVE (1) and (2) accelerometer at the same time using NI USB 4432?

  I am trying to program a LabVIEW GUI to read analog voltage and acceleration at the same time with the device. As the nature of the tasks is different, I put two 'DAQmx create Channel.vi' in the same pattern, with specifying one as 'I-voltage-Basic' and the other as "I-acceleration-accelerometer. When I run the VI, error - 50103 appears to help run the VI.

  Thank you.

  SH

  The USB-4432 has five input channels that share the same timing engine which means that they will share the same timing and synchronization. The five input channels are all part of the same atomic analog input on the 4432 subsystem. Even if the types of measure are different, you can add them to the same task. If you want to treat tension and acceleration differently (for each type of measure), index the strings in the array of channels acquired after your Read DAQmx.

• Measurement of current and voltage USB-4065

  I have an application where I need to measure the direct current and the voltage. The current and voltage will be stable if the measures do not need to be simultaneous. I would use a USB-4065 to the two measures. I've seen the kb indicating the voltage inputs must be disconnected when the measurement current. The current inputs must be separated for a measure of tension?

  Hi Collin,

  I think that you are referencing this knowledge base.  After a few tests, and worked with the R & D group, it seems that the effects of input connections are perceived during the passage of two ways.  When the current entries are connected, a less accurate voltage reading occurs.  As such, please disconnect the current inputs for a measure of tension (as well as disconnect with tension when taking a measurement of current entries, who you know).

• USB-6343

  The laptop does not recognize a new device when I plug the USB-6343 in the USB port.  He used to work, but then has been intermittent, acknowledging only from time to time, but now it doesn't work at all.  Any ideas what could be the problem?

  It ends up being an intermittent USB-6343.  Slightly pressing the instrument would be to appear on the bus.

• How to give the option to the user to select the measures of temperature or voltage with NEITHER cDAQ-9178

  Hello. I wrote two programs for the NOR cDAQ-9178 that work perfectly, but now I would like to combine... and users the ability to perform a measurement of the temperature (module NI 9214) or a measure of tension (NI 9201 module). I tried to use an Enum to a case Structure control, where the

  user can choose either 'Measure the temperature', or 'Measure the tension', but during execution of the program, only the before user input panel opens and the program stops. Could someone please look at the code below and give me advice on the placement of my two programs in a structure of case? Each program contains two screws... a Subvi user input and a measure vi. Is it possible for me to drag the temperature and tension screw in the structure of matter? Thank you.

  FYI - I am reposting this, because I couldn't get tethering to work on my previous post

  I found my solution. I had to right click on the Subvi vi... 'Subvi node Setup' and select set the front panel