When I read from a Keithley 2612, I lose 3 numbers of precsion

Hello,
When I read from a Keithley 2612, I lose 3 numbers of precsion. When I connect a probe to the Keithley driver output I can see a current measurement of 0.000005051 uA. This output is wire to a "Merge Signalsbox" and then to a "Write LabVIEW Measurement File". But when I look in the excel file there is only 0.000005 uA. Does anyone know how I can get all of the digits into the excel file? I am using LabVIEW 8.2.1.
Thanks,
Gary

Hi Gary,
Are you using any other VI's in this application? Are you using the write to measurement file to write to a TDM file and then passing that to Excel? If you probe the input to the write to measurement VI is the data truncated? LabVIEW usually converts to scientific notation. Do you have your data formatted to not use scientific notation? Also, you may want to check the significant digits setting in Excel, as it may be cutting off your data.
Nick Keel
Product Manager - NI VeriStand and Model Interface Toolkit
National Instruments

Similar Messages

In latest 2 days after update ios 5.01 my ipad2 suddenly restart when i reading from ibook, what happen with new update ?

In latest 2 days after update ios 5.01 my ipad2 suddenly restart when i reading from ibook, what happen with new update ?

Download the full version of the software then shift click the restore button. This will ask you where the firmware files are. Once you point to the firmware then you can install the official version

Format precision apparently ignored when using read from spreadsheet file

I hope there is ridiculously simple solution to this problem but so far I can't find it. Using the Read from Spreadsheet File function in LabVIEW7.1, I can't get the floating point format (%f) to work; the decimal (%d) seems to work fine. For example, the first value in the attached file is 399.5853. When I read it in using %.2f format I would think I should get 399.58 but instead I get 399.58529663... Oddly if I use %d as the format, I get an as expected value of 399. Can anyone see what I am missing?
Attachments:
ReadFileTEST.vi ‏23 KB
test.txt ‏1 KB

The solution to the problem is the internal representation of floating point numbers: with a limited number of bytes only a limited number of the (infinitely many) real numbers can be represented. The nearest representable number to 399.5853 is 399.58529663 if the so-called single precision representation (abbr. SGL in Labview) is used.
It seems that (ridiculously!) NI has chosen to use SGL as the data format in the Read from Spreadsheet VI which causes the unexpected behaviour you observed.
You can change the representation from SGL (which uses 4 bytes) to DBL (double precision, using 8 bytes) in the Read from Spreadsheet VI and you will observe a better approximation then, but still not 'exact' since the number now reads 399.585300000000018. (With t
he EXT representation, 10 bytes, you could go to even higher precision)
I hope someone from NI reads this and they fix the unnecessary limitation of the precision in the Read from Spreadsheet VI.

Is there a file size limit when using Read From Spreadsheet File?

I'm trying to read in a large file, about 52mb, 525600 lines with 27 fileds in each line using "Read From SpreadsheetFile.vi". I then search the 2D array for -999, which represents bad/no data in that field and total the number of fields with -999 in it. This all works on 3 months worth of data. The program is giving me an out of memory error and stopping in the case where the read takes place on the large one year file. So my question is does the Read from Spreadsheet file have size limitations? Is there a better way to do this? Thanks in advance for the help.
ssmith
Solved!
Go to Solution.

Camerond--
Thanks for the help. I recreated the VI you posted and unfortunately it doesnt work. It looks like the index array vi is only looking at the zero index and not the other 26 fields in each row. This would probably require a FOR LOOP to go through each field index. This is what I have and it works on a smaller version of the file. For some reason LV is using up bucket loads of memory to run this smaller file and crashes running the 60MB file. I've attached one of my vi's to solve this problem and the smaller data set. You'll see in the beginning that I trim some columns and rows to leave just the data I want to scan. Thanks again for the help.
I just tried send 3 months worth of one minute data and it failed. So here is a really small version, 20 minutes worth of data. Does anyone see anything that would cause memory usage issues here?
ssmith
Attachments:
Find-999NoLoops.vi ‏17 KB
TEST2MET.txt ‏3 KB

Mac Mail IMAP shows read message when already read from other devices

Mac Mail IMAP is setup on custom domain ([email protected]). When I open an email message through my iphone it shows it was read. Then when I go into the mail app on my iMac, it shows the message is unread. It still shows unread hours later and even when I click the "Get Mail" button
How do I make it so that Mac mail syncs when I check mail through other devices?
Thank you

Open Terminal in Utilties and copy/paste
This will send the attachment embedded inline. (This works in Snow Leopard, but not sure about Lion. Do a test first. If it doesn't work, just google "send attachment embedded + Lion." You don't actually have to send the message to see how it will appear.)
defaults write com.apple.mail DisableInlineAttachmentViewing 0
To reverse the setting, change the 0 to a 1
However, whether this will work or not will depend on what the e-mail client on the receiver's end does with it.

FIX : Elements 11 photodownloader freezes Win7SP1 when reading from SD card

I found a problem with Elements 11 and the photodownloader. (complete freeze, no blue screen, no possibility to shut down the application because the keyboard, mouse and screen are completely frozen, only shutdown the hard way possible)
My machine is running Win7SP1 64 Bit
SInce a couple of days my computer froze completely when I tried downloading photo's from an SD card.
After an extensive diagnostic, reinstalling elements, testing via an USB key, I found the problem was when photodownloader reads from an SD card.
With this I checked all Microsoft updates which had been installed and which might affect the SD card reader, when I found the MS update KB2800095.
When I removed this update, and rebooted, the photodownloader worked fine again, even when reading from SD cards.
Something in the patch from Microsoft makes photodownloader and Win7 to completely freeze up.

I am running Windows 7 Home Premium. The autoplay box automatically comes up with the Elements 12 box to select, but when I click on it, it gives that hateful noise and says "that there is no file associated with it and to go to default programs and associate it with one. When I go to the Default programs, it gives this list of stupid stuff like "Paint" whatever that is, and stuff I never use and there is no way to add Elements 12 or any other thing. Have right clicked, left clicked and everything else but nothing works.
How could I uninstall the entire program and not lose my organizer that has 40,000 photos and videos on there? I don't understand it.
And, also, I have to admit that I have no understanding whatsoever to understand the link that you so kindly gave me. Sorry to be such an idiot, but I'm a nurse, not a computer expert and guess it is pretty clear that I just don't understand it. My husband is an IT person but has no idea what to tell me because he has never worked with stuff like Elements or Photoshop, etc.
Any other suggestions that I could understand would be really appreciated. Am just so frustrated.

Why does Read from Text file default to array of 9 elements

I am writing to a text file starting with a type def. cluster (control) of say 15 dbl numeric elements, that works fine I open the tab-delimited text file and all of the elements appear in the file. However when I read from the same text file back to the same type def. cluster (indicator), the read from text file defaults to 9 elements?? Is there a way to control how many elements are read from the file. This all works great when I initially use a cluster of 9 elements and read back to a cluster of 9 elements.
Solved!
Go to Solution.

From the LabVIEW Help: http://zone.ni.com/reference/en-XX/help/371361G-01/glang/array_to_cluster/
Converts a 1D array to a cluster of elements of the same type as the array elements. Right-click the function and select Cluster Size from the shortcut menu to set the number of elements in the cluster.
The default is nine. The maximum cluster size for this function is 256.
Aside: so, how many times has this question been asked over the years?

Service Call documents can't be read from B1 DI SERVER

Dear All,
Service Call documents can't be read from B1 DI SERVER using B1WS (wsdl) for service calls (OSCL) which has column/ field "IsEntitled" = "C".
Based on REFDB.chm, SAP B1 Technical Documentation, field IsEntitled can only be filled by two values:
"C" = Valid contract exist
and
"N" = No
But ... in wsdl B1WS file, ServiceCallService.wsdl only allows "Y" and "N" values. The XML is as below:
     <s:element minOccurs="0" name="EntitledforService">
              <s:simpleType>
                <s:restriction base="s:string">
                  <s:enumeration value="tNO" />
                  <s:enumeration value="tYES" />
                </s:restriction>
              </s:simpleType>
            </s:element>
Consequently, Service Call which has IsEntitled value "N" CAN be read because tNO means "N" ("N" and "N" are equal). Coversely, "C" CAN NOT be read because tYES means "Y" ("C" and "Y" are not equal).
We looked at the DI Server log, the problem occurs when DI Server receives getByParam commands which retrieve service call with "C" value on its IsEntitled field. So, the problem happens when we read from the DI Server, not when we update the service call. (the error message is Invalid valid value 'C' in Enum 'BoYesNoEnum', the valid values are 'N', 'Y')
The log is as follow:
<?xml version='1.0' ?><S:Envelope xmlns:S="http://www.w3.org/2003/05/soap-envelope">
<S:Header>
    <MsgHeader xmlns="http://www.sap.com/SBO/DIS" xmlns:ns2="ServiceCallsService">
      <SessionID>4FD32D48-47B0-4ECB-9E23-0DE4A5576CDE</SessionID>
      <ServiceName>ServiceCallsService</ServiceName>
    </MsgHeader>
</S:Header>
<S:Body>
    <ns2:GetByParams xmlns="http://www.sap.com/SBO/DIS" xmlns:ns2="ServiceCallsService">
      <ServiceCallParams>
        <ServiceCallID>52</ServiceCallID>
      </ServiceCallParams>
    </ns2:GetByParams>
</S:Body>
</S:Envelope>
08/07/2011 14:31:40 Response (Fault)
<?xml version="1.0"?><env:Envelope xmlns:env="http://www.w3.org/2003/05/soap-envelope">
<env:Body>
    <env:Fault>
      <env:Code>
        <env:Value>env:Sender</env:Value>
        <env:Subcode>
          <env:Value>-1013</env:Value>
        </env:Subcode>
      </env:Code>
      <env:Reason>
        <env:Text xml:lang="en">Invalid valid value 'C' in Enum 'BoYesNoEnum', the valid values are 'N', 'Y'</env:Text>
      </env:Reason>
      <env:Detail>
        <Service>ServiceCallsService</Service>
        <Command>GetByParams</Command>
        <SessionID>4FD32D48-47B0-4ECB-9E23-0DE4A5576CDE</SessionID>
      </env:Detail>
    </env:Fault>
</env:Body>
</env:Envelope>
Any solution?
Edited by: Alfa Ryano Yohanis on Jul 8, 2011 3:02 PM

Hi Alfa
I am experiencing the exact same issue as described above.
Did you solve it? And if so, how?
Thank You,
Marco Muller

When I update my nano ipod I get an error message "User ipod cannot be updated. The disk couldnot be read from or written to." How can I overcome this error message.

In the iTunes window, when I update my nano ipod, I get an error message "User ipod cannot be updated. The disk could not be read from or written to." How can I overcome this error message.

Hello there dilip77707,
It sounds like you are getting this error message that your iPod cannot be read from or written to when you are trying to update your iPod Nano. I recommend the troubleshooting from the following article to help you get that resolved. Its pretty straight forward, just start at the top and work your way down as needed:
'Disk cannot be read from or written to' when syncing iPod or 'Firmware update failure' error when updating or restoring iPod
Thank you for using Apple Support Communities.
All the very best,
Sterling

Error when syncing iPod: The disk could not be read from or written to!!

I have an iPod mini which worked fine on my Windows XP.
Recently got Windows Vista and I downloaded iTunes and my put my music in the library.
When I plugged my iPod into the Vista, it said it was syncing all the songs to my iPod.
After about 3 hours, whilst syncing the last song a notice came up saying, 'Attempting to copy to the disk failed. The disk could not be read from or written to.'
I restored my iPod and reinstalled iTunes but the same thing happend.
I decided to plug my iPod back into the Windows XP, where I've had no problems. When I did this and started snycing all the songs, I got the notice come up again.
'Attempting to copy to the disk failed. The disk could not be read from or written to.'
I haven't been able to use my iPod now for about 5 weeks because I cannot solve the problem so any help will be much appreciated!
Thanks

You have posted in the Mac forum for problems & questions usting the iTunes store. You will probably find more help in the following forum.
http://discussions.apple.com/forum.jspa?forumID=800

I tunes: when trying to burn a playlist I keep getting the message: the attempt to burn a disc failed. The disc could not be read from or written to. I am using version 12

I tunes: I am using version 12 of I tunes. Ever since downloading it I get the message when trying to burn a playlist it says, The attempt to burn a disc failed. The disc could not be read from or written to.
I uninstalled V-12 and then reinstalled it. This enabled me to burn a disc again but after a couple of tries I received the same error message again. Has Apple put out a fix to this problem that anyone is aware of?
Thanks.

Hi rossfrombluffton,
Welcome to the Support Communities! The resource below provides some general things to consider when burning a disc with iTunes. I would also try burning a music CD and a data disc from a different application in the Windows OS and trying a different brand CD just to confirm the issue is not with the optical drive.
Can't burn a CD in iTunes for Windows - Apple Support
http://support.apple.com/en-ae/HT203173
Find out what to do if you can't burn an audio CD using iTunes for Windows. Sometimes an audio disc may not burn as expected. Here are some things to check.
Update iTunes
Download and install the latest version of iTunes for Windows.Check for unauthorized songs
iTunes will stop burning a disc if you purchased one or more of the songs in a playlist from the iTunes Store and the songs aren't authorized to play on your computer. This message should appear: "Some of the files can not be burned to an audio CD. Do you still want to burn the remainder of this playlist? For more information on why some files can not be burned, click below."
To find out which songs aren't authorized, play each song in the playlist. Songs that play are authorized. Songs that don't play aren't authorized. You'll be asked to authorize any unauthorized songs.Make sure your playlist will fit on a single CD
If there are too many songs in a playlist to fit on a single CD, iTunes should ask if you want to burn multiple discs or cancel the burn. This message should appear: "The songs in this playlist will not fit on one Audio CD. Do you want to create multiple Audio CDs with this playlist split across them? This will require more than one blank CD to complete."
If you click the Audio CDs button, the burn will continue and you'll be asked to insert blank CDs until the playlist is completely burned. If you click cancel, the burn will be canceled.
To make the playlist shorter so that it will fit on a single CD, select a song to remove from the playlist and choose Edit > Clear. Repeat this step until the duration of the playlist is between 60 and 80 minutes. The duration appears at the top of the playlist window. Most CD-R discs can hold 60 to 80 minutes of music.
Check how many times you've burned the playlist
An unchanged playlist that contains songs purchased from the iTunes Store can be burned no more than seven times.Additional steps and submitting feedback
Go to iTunes Support to get additional troubleshooting suggestions specific to your optical drive configuration or to submit feedback to Apple.Learn more
For additional troubleshooting, please see these steps:
Additional troubleshooting tips for burning issues
iTunes for Windows doesn't recognize my audio CDs
Last Modified: Feb 3, 2015
Have a good day ...
- Judy

Lightroom encountered and error when reading from it preview cache and needs to quit

A power outage caused my Lightroom 5.2 to shut down without closing. When I powered back up and opened lightroom it gives me an error "Lightroom encountered and error when reading from it preview cache and needs to quit" and then it says it will try to fix it the next time it opens. I have opened it 20 times and it is not fixing it. I removed the program completely and upgraded to 5.5 AND it is still giving me the same error. Is my catalog corrupt or something? I had it set to automatically load the most currently used catalog, so it is not allowing me to open or start a new catalog either. HELP!!!

Search the forum, this has been answered many times.

I'm unable to open up Lightroom 5, I get this message in a pop up box: "Lightroom encountered an error when reading from it's preview cache and needs to quit" Underneath that is "Lightroom will attempt to fix this problem the next time when it launches."

I'm unable to open up Lightroom 5, I get this message in a pop up box: "Lightroom encountered an error when reading from it's preview cache and needs to quit" Underneath that is "Lightroom will attempt to fix this problem the next time when it launches." It hasn't, what should I do? Thanks Shawn (Irish Se7en) .

Can you try to rename (not delete!) the folder named "YOUR_CATALOG_NAME Previews.lrdata" and restart Lightroom?

"Lightroom encountered and error when reading from its preview cache and needs to quit"

I keep receiving this error every time I open LR, "Lightroom encountered and error when reading from its preview cache and needs to quit" and the app won't open. It said LR would try and fix this error next time I opened it but the error remains. I tried uninstalled and installing the app and the error remains.
Any Ideas here? Is there another app that may be telling it where to look for the cache and it no longer there? I was using a ramdisk for a bit but ditched it. Not sure if that has something to do with it but it seems suspect.
Your thoughts?
--Kenny Brandon Wilson

Talked to Adobe support this morning, this is their response in case anyone else is looking for help. I'm running a Windows 7 box, LR 5.6.
Gokul: Click on start and type %appdata%, then open roaming folder.
Edward: ok
Gokul: Open Adobe folder.
Gokul: Open Lightroom folder.
Gokul: Open Lightroom folder> Preferences.
Edward: ok
Gokul: Rename Lightroom 5 Preferences.agprefs file as Lightroom 5 Preferences.agprefsOLD.
Edward: OK
Gokul: Please check if you can launch Lightroom without any error.
Edward: it shows me a welcome screen and is asking me to select my country
Edward: aka, register the software
Gokul: You can skip and launch it.
Edward: LR catalog not found
Gokul: Please select the catalog.
Edward: my original catalog?
Gokul: Yes.
Edward: testing integrity of catalog
Edward: loaded just fine
Gokul: Okay.
Gokul: Please check if you can re-launch it again.
Edward: yes, it worked!
Gokul: Excellent!
Gokul: Since your preferences were corrupted you were facing issue so we renamed the preferences file to reset it.
Edward: aha....ok
All of my import/export presets were intact along with develop user presets. I'm happy as a clam for my $10/month!

LR encountered an error when reading from its preview cache and needs to quit.

I have the 30 day trial version of Lightroom. I was able to use it for one week, but the past 1.5-2 weeks, it has been locked up and giving this error message. How do I resolve the problem? And how do I reset the 30 day free trial? I would like to have time using the product, before deciding on the annual contract.
"LR encountered an error when reading from its preview cache and needs to quit. Lightroom will attempt to fix this problem the next time it launches."
Thank you.

Delete the preview cache from the Lightroom folder in your Pictures folder if you used the default placement. It has the extension .lrdata.
You cannot reset the trial period.

When I read from a Keithley 2612, I lose 3 numbers of precsion

Similar Messages

Maybe you are looking for