faster identified measurement of AC voltage with hp34401a

Similar Questions

• Can we average channel error using multiple channels to measure the same voltage?

  I don't know how correlated error terms are between measuring channels max, but it occurred to me that, if they were relatively independent, I might be able to sample the signal even with several channels and increase accuracy.

  For example, rather than measure a voltage with an AI only at 100 kHz, I could connect up to 10 different lines to HAVE the signal, sample to 10 kHz on each line.  This should allow to reach me on average some of the error associated with each channel (, or so I think).

  Can someone speak definitively to this?

  Thank you

  Sean

  Well, if you are using a MULTIPLEXED Board (everything is not specced for simultaneous sampling) then each channel is connected to the ADC even one after the other, best that you would be able to do is extremely, extremely small variations into the paths of each channel of the multiplexer.  This would still be massively overshadowed by the inherent noise from the system and the accuracy of the device.

  Your best bets to reduce the measurement error is to oversample in one way to reduce the effects of noise and to calibrate the unit before starting each test to keep variations of temperature.  In addition, make sure you keep your calibrated Board (most of the boards have a calibration 1 year of the cycle).

  For some applications, you should also consult wiring field and considerations of noise for analog signals, How to eliminate ghosting of my measurements? and Troubleshooting unexpected tensions, floating or crosstalk on Analog Input Channels to better account for ghosting and the issues of the hour.

• your identifier apple is not associated with a content in itunes connect provider (2002)

  your identifier apple is not associated with a content in itunes connect provider (2002)

  me too * can someone just tell me how to solve this problem?

• "this identifier apple is still used with the app store - 3times deducted from my credit card.

  I am trying to connect to the iStore, but I receive the following message: "" this identifier apple is still used with the app store.

  I following the registration process, but nothing happened just 3times deducted from my credit card...

  I filled the fields are all required and still does not work, just my credit card losing ~ $7 Dollar (2.2 dollar every time with the following msg: ITUNES ITUNES.COM/BILL.) COM READ) I don't want to spend more money for a simple registration... Thanks for help.

  They are fresh from holding temporary store, your card issuer should remove in a few days or more: on the payment card's authorization in the iTunes Store - Apple Support

  A card having a chance to be accepted it must be registered with the same name and address (including the format and spacing etc) that you have on your iTunes account and have been issued by a bank in the country where you are (and, therefore, the country that sits on your iTunes account). If it is you can check with the card issuer to see if it is them who are in decline. Or do you have another card you could try?

  Or to create a new account without giving details of the payment: create an iTunes Store account, App Store and iBooks Store without credit card or other method of payment - Apple Support

• Noise measurement of an accelerometer with card PCI-4461

  Hello world

  I'm trying to measure the noise of an accelerometer, except with a card PCI-4461.

  First of all, I measured manually this noise with the help of a HP35665 signal Analyzer. I get something like this:

  

  And now with LabView and the PCI-4461 map, I get this:

  

  My question is: Whence this part? And how to remove it? (Since there is no with the signal Analyzer)

  

  I'm using LabView 8.5.

  This is how I configured the DAQ acquisition:

  

  and it's my VI:

  

  Thank you in advance for help

  Arthur

  
  

• 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

• HOW can I identify which instance is associated with what listener

  Hi all
  I have created a DB instance. Suppose that named 'B '. but there is already another this DB instance. Named 'A '.
  Then, I created a listener instance DB 'B '.
  
  Now, my what, is that HOW can I identify which instance is associated with what listener.
  
  (2) if I create listener can also created service. If I stopped that service and then I can fire the query or Login again, WHAT will be the expected result.
  I tried to ask people of my answer. but not convinced.
  Please help me for this.
  Thanks in advance

  856376 wrote:
  Hi all
  I have created a DB instance. Suppose that named 'B '. but there is already another this DB instance. Named 'A '.
  Then, I created a listener instance DB 'B '.

  Now, my what, is that HOW can I identify which instance is associated with what listener.

  A listener is able and sufficient to deal with all the instances running on the computer. You are supposed never to create a listener instance. So in your case, the other instance B would be also recorded with the already present litener as well as the existing instance.

  (2) if I create listener can also created service. If I stopped that service and then I can fire the query or Login again, WHAT will be the expected result.

  Have you tried looking in this area and see what would be the expected result?

  Services are a means through which handles things. And when the service would cease, it means that this particular thing also will not work. Now, do you understand what the listener is actually used for? It is intended to listen for incoming connection requests. So if you turned it OFF, you cannot send to your db.

  I tried to ask people of my answer. but not convinced.

  Before asking people, please read the documentation that covers all these things in a large part. Check it out at http://tahiti.oracle.com.

  HTH
  Aman...

• How to identify which instance is associated with what earphone

  Hi all
  I have created a DB instance. Suppose that named 'B '. but there is already another this DB instance. Named 'A '.
  Then, I created a listener instance DB 'B '.
  
  Now, my what, is that HOW can I identify which instance is associated with what listener.
  
  (2) if I create listener can also created service. If I stopped that service and then I can fire the query or Login again, WHAT will be the expected result.
  I tried to ask people of my answer. but not convinced.
  Please help me for this.
  Thanks in advance

  See the listener.ora file. It is usually $ORACLE_HOME/network/admin/listener.ora

  You can see what listener is associated with a file.

  Details will generally be like this

  >
  LSNR1 =
  (DESCRIPTION_LIST =
  (DESCRIPTION =
  (ADDRESS_LIST =
  (ADDRESS = (PROTOCOL = TCP) (HOST = instance1)(PORT = 1666))
  )
  )
  )

  LSNR2 =
  (DESCRIPTION_LIST =
  (DESCRIPTION =
  (ADDRESS_LIST =
  (ADDRESS = (PROTOCOL = TCP) (HOST = instance2)(PORT = 2666))
  )
  )
  )

  >

  >
  If I create listener can also created service. If I stopped that service and then I can fire the query or Login again, WHAT will be the expected result.
  I tried to ask people of my answer. but not convinced.
  >

  A listener is used when a client wants to connect to the database server. If you connect directly to the server without using the name of the instance, then you can connect even if you stop the service.

  Check it,

  C:\Windows\system32>lsnrctl stop
  
  LSNRCTL for 32-bit Windows: Version 10.2.0.3.0 - Production on 03-MAY-2011 23:06
  :22
  
  Copyright (c) 1991, 2006, Oracle.  All rights reserved.
  
  Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1)))
  The command completed successfully
  
  C:\Windows\system32>sqlplus ganesh
  
  SQL*Plus: Release 10.2.0.3.0 - Production on Tue May 3 23:06:36 2011
  
  Copyright (c) 1982, 2006, Oracle.  All Rights Reserved.
  
  Enter password:
  
  Connected to:
  Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - Production
  With the Partitioning, OLAP and Data Mining options
  
  SQL> select * from dual;
  
  D
  -
  X
  
  SQL>
  

  But if you try to connect from a client, or use the name of the instance, while connectineg
  you get the error like that,

  SQL> conn ganesh@ganesh
  Enter password: ******
  ERROR:
  ORA-12541: TNS:no listener
  
  Warning: You are no longer connected to ORACLE.
  SQL> 
  

  If you see, I used the name of the @ganesh instance.

  G.

• Measurement of voltage and the voltage with CompactDAQ display?

  OK, I just got my CompactDAQ hooked up with two modules (9225, 9239) and am able to simple single-phase voltage (120 VAC)... I connected an indicator, and it gives me shooting random sine wave values and what I'm looking for a simple voltage reading.  MAX and the DAQ assistant both work very well to the configuration task and I can see the signal in there.

  I dug through the DAQmx, watched functions in the knowledge base and have searched here without any real results.  I also downloaded the EPM resource kit, but it's tools for further on the road...  It seems to me that this should be simple crazy, but maybe I go too hard or just looking is not in the right place?  I would greatly appreciate a point in the right direction!

  Thank you!

  Chad

  With the help of... Windows XP (SP3), LabVIEW 2009, cDAQ-9174, 9225, 9239.

  Chad,

  When you say "simple voltage readout" are you referring to the effective voltage of the AC signal?  If Yes, you can use the Express VI 'Amplitude and level measures' to calculate the desired value.

  

  Hope this helps, otherwise if specify you what you are looking for a little I will try again.

  ~ SimonH

• Measures of true bipolar voltage with USB 6008/6009

  The 6008 or 6009 to make true bipolar (positive and negative voltages referenced to GND) measurements?  If not, what is the solution to purchase cheaper data this feature?

  Thank you.

  The question of unipolar vs bipolar vs bipolar Pseudo-aleatoire also was mentioned in this thread.  The 6008 6009 use bipolar-only mode and load the setting differential input or CSR.  Please note that {unipolar / bipolar / Pseudo-bipolaire} is independent of {differential / CSR / Pseudo-differentiel}.

  The 6008/6009 don't use 'Pseudo-bipolaire', which means that each differential input should be positive with respect to the ground.

  Best regards

• Measurement of voltage with NEITHER - 9203

  Hello

  Is it possible to use the NI9203 card for voltage? I need to replace one of the pressure sensors that has output of sensor that has a single output voltage current and there is not any card with entrance to the machine. In the data sheet there is a block diagram of the input circuit of the card where R 138 Ohm is connected to COM. So, if I connect R aprrox. 360 ohms in series to the input card that I will get a voltage divider that will transform the voltage of 0 - 10V, 0-20mA current. It will work properly?

  Thank you very much for the help!

  Jan,

  In theory, adding the external series resistance should work.  I hope that it is a fairly short cable length and not a real noisy.  You will need to check that the new sensor is able to drive a load of 20mA.  You will need to take the resistance of the wiring etc. account when setting this up.

• 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

• Measurement of the hysteresis with metal plate

  Hi all. I have the task of understanding. I want to measure the hysteresis of elastic coupling. To the couple measure I two strain gages on 90 degrees (NI 9237 bridge half, II). After calculation, I now have the couple. In the other hand I measure angle of rotation of the motor with a metal plate with 52 teeth (gear). Angle of rotation I use input digital OR 9401. Hysteresis of bild, now I must on each tooth torque couted. I tried the example Multi - multifunction - Ctr Retrigg a generation sample clock Pulse Train HAVE but still graf give me the straight line. Can someone help me with this? Are there more better example for me, or clips in internet to show me how to do? Thanks before.

  This is this case, the problem may be, the data acquisition card cannot rearm the fast enough triger either acquisition takes too long.

  In the configuration of the screenshot I see you want to acquire 100 samples at 1 kHz. This means that each acquisition will be at least 100ms which might be too long for your application. NEITHER 9237 supports a maximum rate of 50 kHz, so my first sugestion would be to simply increase the sampling rate and see if it helps.

• problem reading DAQmx using Measurement Studio 2010 (even with examples OR)

  Hi all

  I'm reading the voltage using a map of NOR-DAQ-6211 with Measurement Studio 2010 SP1 V9.1.0.204. using Visual Basic .net 2010.
  When I create the task of data acquisition with the measurement studio Wizard, (Assistant DAQ) everything works fine. However, when I try to create my own task player in looking over the "ContAcqVoltageSamples_IntClk" everything I read is a value in the range of Vmin to Vmax (or to Vmin Vmax) and then she stays there no matter if I change my diet. Vmin and Vmax does not yet match my values of voltage. (It acts like that on my application and example of OR) I guess I missed a few initial settings. The config of AIChannel in two projects (manual task and Augo-Gen) use AIChannelConfig.RSE (I tried other options, but no luck).

  The only wiered thing is that when I open examples of projects, VS does not recognize the object references of NOR. Workspace names DAQmx. When I check the references, it shows that it does not find the reference to NI.Common. To make it work/compilation, removed from the solution and I again added. (I don't think this is related, as it seems that there are available tensions but not read correctly).

  The other thing is that my input voltage is 3 or 0 volt. When you use the manual DAQtask, when I toggle the voltage, the values displayed change momentarily the order of 0.001 Volts and then go back to their previous values of Vmax and Vmin.

  Is there more information I can provide?

  Help, please
  Thank you

  Yay! I just solved my problem,

  From the first moment I knew there was something fishy about this AITerminalConfig thingy! I made two errors:

  1. in the code example Configuration AI is encoded: CType (-1, AITerminalConfiguration) that caused the code example does not work for all channels to HAVE it

  2 - also, I have in my code, I had put this config to the correct value, but I was checking ai0 all the time while the signal was on another I. I was under the impression that since the example does not work for all my channels, then probably my code does not work as well.

  If after changing the line in the example for the correct terminal configuration settings, he began working for the AI number I was looking for too much and I found that my code worked for my AI # correctly from the beginning. I wasn't just to see it!

• Non-linear voltage with current variance

  [10/07/2014 edited by moderator as requested]

  I'm trying to measure the design resistance of the voltage across my test using NI9205 sample. I have a power supply current constant and 30 cm of wire across copper as connectors to my example. I'm exploring various levels from 20 to 500 my.

  However, the resistance or voltage/current ratio do not seem to be constant on current values. Current increase seem to increase the resistance of .01ohms.

  I change the lines in my daq between 200-1-5 a 10 V.(+-) of heat due to the current, and changes in the sample of it are not a factor. Is that an offset voltage when changin ranges that affects it? I use the daq with no custom scale Wizard. I do, however, collect samples from 1000 to 1000 Hz and their average.

  Tried to use 4 wire measures?

  0.01 ohm in 30cm copper wire... seems reasonable...

  so: two sons for the current and two sons for the measurement of voltage (differential).  Guess the image below that is screwed is current and voltage