excitement of the thermistor and NI6224 DAQ board / whatever it is quick and (relatively) cheap?

Similar Questions

• best way to measure the thermistor

  Hello!

  We are looking for a solution for measuring temperature thermistor. I've read the material resources OR recommend for the thermistor measures.
  Can you give me some ideas other alternatives for usable material temperature through resistance (we would use the default configuration, excitation of 2.5 Volts and a resistance of 5 + thermistor). So we need something capable of giving 2, 5V output and to measure the tension caused falling across the thermistor.

  Would be a NI USB-6009 suitable for this task? I guess that the resolution is not enough maybe?
  Another option might be cheaper with a USB-GPIB interface Keithley 2010 multimeter, but in this case what should we use as a reference of tension?

  Thanks for the tips!

  I want to second opinion to Henrik about repeatability in high resolution.  Measures of temperature with Thermistors are particularly difficult.  You have to worry:

  1. Auto-echauffants because of the power generated by the excitation current
  
  
  2. Time to balance the thermistor and electronic
  
  
  3. Stability of the excitation source
  
  
  4. Stability of the measuring device

  In general, if you want something more than about 1% reproducibility, things start to me interesting.  Of course, it's what makes it fun to do.

  If you go the road of the sound card, remember that while most modern computers have quite high resolution a/d (sometimes up to 24 bits at 96 kHz) converters, you must watch the noise figures to get what you can actually solve.  Off-board solutions (e.g., M - Audio Delta 44) will give you the best numbers of noise, since the ADCs are isolated from noisy inside your computer.

  Good luck and have fun.

• Measure voltage across the thermistor outwardly excited

  Hello

  I'm looking to collect temperature data by measuring the voltage on an input temperature of a piece of industrial equipment terminal. A thermistor is currently connected to a Terminal, and my USB-6212 analog input terminal is connected in parallel. The equipment must remain functional, so the thermistor can not be deleted.

  The problem is the USB-6212 disrupts significantly far - for example, the temperature of the equipment reading spikes of 45degF at 60degF whenever the USB-6212 is connected. Using a multimeter Fluke does not cause the same problem. I tried to measure the input impedance analog for the USB-6212 with a Fluke 87 - III. I get out of the range (> 50 M Ohm) with the lit 6212 and ~ 12 M Ohm in judgment. It seems to meet the specifications and should be high enough to not to disturb the measurement. I do not know the side of the probe, but estimate it's about 20K ohm based on measures of tension DMM with and without parallel resistances.

  Can anyone suggest a way to solve this problem, or another way of measuring? The main constraint is that the thermistor must remain in the terminal of the temperature.

  Thank you

  Leo

  Leo,

  It's only a guess, but a guess a little.

  Two clues: not measured with a multimeter is no distuirb the result. Measure with the USB-6212 disrupts the result.

  The DMM is probably battery powered and not connected to any reference to the ground. Certainly, the USB device is connected to the USB ground which in turn is connected to the mass of the computer.

  My guess: a ground loop between the acquisition of data/USB/computer and industrial equipment. Unless the industrial equipment specifies that one end of the probe is grounded and the reasons for the equipment and the computer are connected to the same point of mass, it will be difficult to measure as you described.

  Things to try:

  1. with the help of the DMM measure the voltage (AC and DC) between each end of the probe and the mass of the equipment.

  2. with data acquisition/computer disconnected the measurement equipment (DMM), tensions between the computer or ground DAQ and the mass of the equipment.

  3. If all the voltages measured in 1 and 2 are in the specification of common mode for entry for the DAQ hardware voltages, then try a differential connection with polarization adapted ground resistances.

  Do you have a technical manual or diagrams for Brad equipment?

  Lynn

• My iPhone 4 stopped working yesterday, it frustrated me because I just a call, I intended to take it to get it fixed, but my sister advised I check the support of the community and guess what? It worked! Am so excited, that I followed the instructions of

  My iPhone 4 stopped working yesterday, it frustrated me because I just a call, I intended to take it to get it fixed, but my sister advised I check the support of the community and guess what? It worked! Am so excited, I followed the instructions of the Mac, I pressed the Start button and the button operation at the same time and the magic took place, am so so excited. THANK YOU MAC!

  Glad that your phone is working again.

  What you were doing by pressing the button home and sleep for 10 seconds, until the Apple logo came back, is called "force restart '.

  You won't lose data by doing this, but it can cure a few glitches. It is usually the last thing to try before you restore the phone to factory again or visit an Apple Retail Store or Apple authorized service provider, where your phone does not at all.

  If your iPhone is not responding or won't turn on - Apple Support

• I am facing a problem with the beep.vi. I have a DAQ program, which acquired the signal and compare it to a threshold value. When a signal is out of range, a Visual and sound alarm has occurred. I use the VI beep.vi to generate the sound.

  I am facing a problem with the beep.vi.  I have a DAQ program, which acquired the signal and compare it to a threshold value. When a signal is out of range, a Visual and sound alarm has occurred. I use the VI beep.vi to generate the sound. Everything works fine except the sound alarm. It gives the table 1 d of type mismatch. I tried to fix this by placing it in a box structure. But it still does not work. If someone could help? Please find attached my VI. Best wishes to all visitors to the Forums of Discussion OR.

  Ihab El-Sayed

  published here: http://forums.ni.com/t5/LabVIEW/Playing-sound-based-on-exceeding-a-threshold-value-1D-array-data/m-p...

• Need to view daq reads per second but only to record a reading every 10 minutes. I would also like to record the date and time, at the same pace. Need help

  Need to show daq reads per second, but only to record a reading every 10 minutes, need help

  You are also looking to taste to 1 Hz data acquisition?

  My approach would be to use the DAQ acquisition to time your loop display reading each acquisition, then use the loop counter to control the logic of your writing to file.  For 1 Hz and 10 minutes write I would use 'quotient and remainder' I / 600; If rest = 0, then write the data point.

  For the date and time, under Calendar palette use the time get in seconds food a DateTime Format to a string.

• Measure the voltage and the temperature at the same time with a single card PCI 6014 DAQ?

  Hello guys,.

  I'm doing a charger measuring the voltage of the battery, the charge current and the temperature of the battery using a 6014 cardboard...

  I want to use my PCI6014 DAQ card to measure 2-channel analog voltage input and 1 temperature Channel Analog input using thermocouple type k measurement of voltage or temperature isolation is OK, but I can't understand how to measure the voltage and the temperature at the same time... I want to use input differential...

  Thank you in advance, all the tips

  YSL

  Create a task and add channels to the task, as follows:

  

  Christian

• Why don't the graph and the table of the DAQ Assistant, when it is run more than once

  I have a vi that collects data and the poster. When I press the run button, it collects data as expected. But, if I changed the samples or the rate and press the run button, it collects data on the previous values of the sample and rate. I have the release of the vi and run it again to perceive in the correct values of the sample and rate.

  I plugged it without the DAQ Assistant and everything works as expected. Thanks for your help. Now, just curious as to why DAQ Assistant does not work well.

  Thanks again!

• Can I synchronize compactDAQ and cards for the generation M Series DAQ waveform continues non-regenerating in RT

  Hello

  I use a M Series DAQ card (6229) multichannel and multipoint make reading and writing of waveforms, all synced to a clock generated on the 6229.  Now I need to extend that to a "remote" (10 m) location and I was planning to use the Ethernet (9188 or 9184) CompactDAQ chassis or maybe 9144 Ethercat slave.  Before I have buy and learn the hard way, I thought I would ask some advice:

  My questions are:

  (1) using the DAQmx can I access the IO on 9184 or transparent 9144 using a multichannel multipoint DAQmx task as I do for the PCI 6299 card?

  (2) are all of these chassis supported if I use RT on the host?

  (3) is the best way to synchronize and trigger the remote system to the host using a digital line between the 6229 plug-in and the chassis from a distance, and if so, how can I connect it to the chassis and set it as a sample clock?

  Any help would be appreciated.

  Hi AnthonV-

  You make perfect sense.  And, I am pleased to report that you can program your analog output task CompactDAQ to use a clock timed by material, like your M Series device.  In fact, it is possible (and perhaps even likely) that the same code of OR-DAQmx you use for M-series can be used directly on CompactDAQ also long that the AO, relaxation and sources of timing and similar channels can be updated to point to your CompactDAQ chassis.

  As I've mentioned before, please note that only the CompactDAQ USB chassis (except the cDAQ-9172) are compatible with the PharLap LabVIEW RT objectives.  I don't know if this will meet your needs for a > extension of 10 m from the host system.

• When I type the words and letters that they jump a place to anotherlem as shownKey Board prob.

  Remember - this is a public forum so never post private information such as numbers of mail or telephone!

  Ideas: You cannot type an E-mail without the words and letters going in all directions. Hato ve tried to fix this but without success

  • Programs, you have problems withsuccess.
  • Error messages
  • Recent changes to your computer
  • What you ae thistried to solve Havlready tried to solve the problem

  If it is a laptop, disable the touchpad.  I work me all the time and initially I've cursed the computer for a while, then turned off the touchpad and got a lot happier.  :-)

  "Young Norval" wrote in the new message: * e-mail address is removed from the privacy... *

  Remember - this is a public forum so never post private information such as numbers of mail or telephone!

  Ideas: You cannot type an E-mail without the words and letters going in all directions. Hato ve tried to fix this but without success

  * Programs have problems withsuccess.
  * Error messages
  * These recent changes made to your computer
  * What you ae thistried to solve Havlready tried to solve the problem

• Different values of Excitation in the same spot

  Hello

  I am trying to acquire signals of pressure two sensors of pressure simultaneously using DAQ Assistant. I use an Ethernet NI DAQ with the NI 9237 Module chassis. One of the transducers requires a voltage of 10 vdc, while the other transducer requires 5 vdc excitation. I created a task DAQ Assistant with two channels (one for each transducer). When I run the VI, it returns the following error:

  Error-200257 occurred to the DAQ Assistant

  Possible reasons:

  Property of excitement must be the same for the related physical channels.

  Refer to the documentation for more information on the definition of excitement through the related physical channels.

  Conflicting properties

  Property: AI. Excit.Src
  Value: Internal

  Property: AI. Excit.Val
  Value: 10.0

  Channel name: Pressure_1

  It looks like using different excitations causing the problem. Can you please help me solve this problem in order to acquire simultaneous action of the two sensors and provide the necessary excitement for each of them.

  Aaron_W

  Thank you for your response. Based on what you posted and I expected different values of excitement are at the origin of the problem. However, I am always looking for another solution instead of buying an additional module because it is quite expensive for a student like me.

• Problem setting Legacy DAQ board using NOR-DAQ 6.1 for Labview

  I know that the Board of Directors is an old legacy product not supported by NEITHER, however for a low-budget project, I have 3 of these AT-MIO-16 x cards and the need to use them.

  I know I got this job in the past not distant os, however, for the life of me can't get things sorted and work.

  You use a NT box, in which this configuration used to work... uninstalled and started fees for other reasons, and I can not get the NOR-DAQ 6.1 to support LAbview 6.1 or 7.1.

  Of course, I understand the OR-DAQ 6.1 should be used for Labview 5 and older, but also know this has been successfully done in the past.

  I downloaded all knowledge base articles dozed or both support and remember to use successfully the last time that I set up so I know not somehow it works.

  My configuration is: AT-MIO-16 X to the bus combo board (called work)

  NT PC

  LabVIEW 6.1 or 7.1

  NOR-DAQ 6.1 is the most recent to support this card.

  However, it will not install its support to its latest versions of Labview and I get errors, crashing, or missing files, when I followed various circumvention of knowledge base solutions.

  I was hoping that someone has a documentation somewhere how to handle this, because it really is a matrix of spaghetti.

  I can get NOR-DAQ support files installed, and Configuration Manager works well, finds the map and allows its parameters to be defined.

  But when I load the DAQ vi of any type, Labview accidents and the wizard of data acquisition channel does not work at all (no error).

  Thank you

  Yes, the installation program from the folder of disks for NOR-DAQ 6.1 on the ftp site has worked well.

  Workaround. Thank you

• Jump in the middle of an audio track streaming on various sites causes the stuttering and audio glitch

  Hello

  Please refer to this thread for support on the technical support of SoundCloud forums. The thread contains all relevant information, including videos of the screenshots problem and console, made by myself and others. https://www.soundcloudcommunity.com/SoundCloud/topics/skipping-to-the-middle-of-a-track-causes-stuttering-and-glitchy-audio-chrome-Firefox

  In short, when you try to move forward for streaming audio, there is a memory buffer/stuttering problem that prevents a correct reading of the track. This problem is confirmed on SoundCloud and Traxsource and other people in the support thread mentioned Mixcloud and other streaming sites. In other words, it is not the special streaming service fault or another.

  The problem does not occur in Microsoft Edge, Internet Explorer or Chrome. Well, to clarify, when the issue was published on SoundCloud support forums, Chrome was having the same problem. However, they made a version a few days ago thrust, that fixed it.

  Here's my original on the SoundCloud support post (less), which has the relevant details. Note that we have updated both Flash and Firefox recently, so although I have mentioned earlier in my original post, everyone involved has since updated their browsers and Flash.

  From now on, the only solution for the problem is to go back to Firefox 40.0.2. Thanks for any help =)

  Matt

  Original message =.

  Jump in the middle of a track causes the stuttering and audio glitch (Firefox).

  I am running Windows 10 Pro.

  There seems to be a problem of caching that affect reading - I started noticing this problem three or four days ago. Previously, I could jump through my feeds at will, go straight until the middle of the tracks or mixes of listen seconds and determine if I liked the track. Now, I can't do it on Firefox 41.0.1. The problem is simply annoying on songs that are 3 or 4 minutes in length, as I must leave "cache" maybe ten seconds before jumping. Unfortunately, the problem is a game-breaker on mixtures which, for example, are 90 minutes long. If I jump to a point directly in the middle of the combination, nothing happens. The play button alternates between the 'Play' symbol and the symbol of 'Caching' ('... "), and so audio resumes, it is glitchy and consists of different parts of the track being played at the same time.

  I've eliminated my internet connection as the source of the problem by loading on board. On the edge of 20.10240.16384, the problem does not exist. I can scroll down to any mix of 2 hours in my stream, click on the middle of it, and the audio starts right up. No caching, without stuttering or glitching.

  I drove back Flash version 18 to see if it solved the problem in Firefox, but it did not. The problem persisted, so I re-updated to Flash 19.

  Yes, I understand how all versions and updates to work. I meant it as a generation of powder magazine. My bad.

  I consider this problem to be solved. Several different pre-release versions of Firefox have solved the problem; I have personally used both of them that work perfectly. A representative of Bugzilla stated that the patch will be integrated into Firefox 42, which will be released on 3 November.

  https://www.soundcloudcommunity.com/SoundCloud/topics/skipping-to-the-middle-of-a-track-causes-stuttering-and-glitchy-audio-chrome-Firefox?topic-reply-list [Settings] [filter_by] = all & question-answer-list [parameters] [reply_id] = 16269116 #reply_16269116

  I now consider this private matter. Thanks to all of you who have been here =)

• Add the date and time to a photo

  How to add the date and time to a photo or contact sheet in OS X El captain?

  KADRI

  Christiana

  You want to write the date and time in the photo?

  You need to do it in an external editor.  Photos can't.

  You can print the date and time and other legends on a Board-contact, however.  When you select a photo and then use the model of the "Contact Sheet", you can click the 'Captions' button and select the metadata to use as the legend on the contact sheet.

  

  To write directly to the photo, you can use the Preview.app.

  Export the photo to go to Photos and then open it in preview or install the extension of"external editors" of the App Store. Then you can open preview directly from the Panel of editing in Photos.  See this tip for user: external photo editors are here

• The Milanese loop can be worn all by playing of the drum and operation etc. of hiking? (I'm a drummer) and I can wear Apple Watch in the shower?

  I'm in a band and make a lot of drums and hike as well. A lot of things on the outside where I might have to move my arm quickly or a lot. Always do

  the Milanese loop what the band for me? (I'm a guy is told by the way) and secondly I can wear Apple Watch in the shower? answers will help me to decide what the band to get when I buy a Apple Watch 42mm soon

  See this document: water on Apple Watch - Apple Support resistance

  https://support.Apple.com/en-us/HT205000

  No shower while wearing the Watch:

  Your Apple Watch is splash and water resistant, but not waterproof.

  ....

  and

  The following can affect your Apple Watch water resistance and should be avoided:

  • Do drop your Apple Watch or submit to other impacts.
  • Submerge your Apple Watch in water for long periods of time.
  • Swim or bathe with your Apple Watch.
  • Expose your Apple Watch pressurized water or water of high velocity, for example, take a shower, water skiing, wake boarding, surfing, jet skiing and so on.
  • Wear your Apple Watch in a sauna or Hammam room.

  I'm not sure of the loop of the Milanese to your needs.  It is easily adjustable and fits perfectly, but it's magnetic and I'm not sure if that may interfere with your equipment.

  My watch has the sports Strip and that is comfortable also.