Simple Data logging application wanted

Does anyone know if there is a simple (and free) data logging
application available? I want to store a set of data from an analog
input from the DAC-1200 card.
Doug
[email protected]

You can start by taking a look at datalogging examples at /examples/file/datalog.llb. There are several datalogging examples, including one which simulates data, but you could easily replace that with your data from the DAC-1200.
If that's not exactly what you want, storing data to the drive is relatively simple. I can write you a vi that you can put in a loop, and it will put a header and write the data.
Mark

Similar Messages

N95 Packet Data log duration won't clear

I would like to know if anyone else has experienced a fault that I have with my N95 8G running the latest version of software.
The fault is around the Packet Data log.
I want to be able to keep tabs on my daily data usage, so have set the log duration to 1 day. When I check the packet data counters the following day, they have not reset. I have left the counter running for 7 days now and they still haven't reset.
Maybe I don't understand this feature, but I was expecting the counters to reset after 1 day.
Nokia support have sent out their standard 'we have no idea wants wrong' email requesting me to return the phone back to factory setting and loose all my data, which I'm reluctant to do.
Cheers,
Paul

The "keep logs for" feature does not affect the counters.
All it does is keep individual events for the specified duration.
Enter the "logs" application and then scroll right. You'll see a list of logged events (calls, messages in/out, packet data usage etc). THESE are the entries kept for one day with your settings.
Was this post helpful? If so, please click on the white "Kudos!" star below. Thank you!

How do I control a data log session with period and sample time?

I need a data logging system where the operator can select 2 logging parameters: Log Period and Sample Time. I also need a START and STOP button to control the logging session. For example, set the log period for 1 hour and the sampling time for 1 second. (I may be using the wrong jargon here.) In this case when the START button is clicked, the system starts logging for 1 second. An hour later, it logs data for another second, and so on until the operator clicks the STOP button. (I will also include a time limit so the logging session will automatically stop after a certain amount of time has elapsed.)
It’s important that when the STOP button is clicked, that the system promptly stops logging. I cannot have the operator wait for up to an hour.
Note that a logging session could last for several days. The application here involves a ship towing a barge at sea where they want to monitor and data log tow line tension. While the system is logging, I need the graph X-axis (autoscaled) to show the date and time. (I’m having trouble getting the graph to show the correct date and time.) For this application, I also need the system to promptly start data logging at a continuous high rate during alarm conditions.
Of course I need to archive the data and retrieve it later for analysis. I think this part I can handle.
Please make a recommendation for program control and provide sample code if you can. It’s the program control concepts that I think I mostly need help here. I also wish to use the Strip Chart Update Mode so the operator can easily view the entire logging session.
DAQ Hardware: Not Selected Yet
LabVIEW Version: 6.1 (Feel free to recommend a v7 solution because I need to soon get it anyway.)
Operating System: Win 2000
In summary:
How do I control a graphing (data log) session for both period and sample time?
How do I stop the session without having to wait for the period to end?
How do I automatically interrupt and control a session during alarm conditions?
Does it make a difference if there is more than one graph (or chart) involved where there are variable sample rates?
Thanks,
Dave

Hello Dave,
Sounds like you have quite the system to set up here. It doesn�t look like you are doing anything terribly complicated. You should be able to modify different examples for the different parts of your application. Examples are always the best place to start.
For analog input, the �Cont Acq&Chart (buffered).vi� example is a great place to start. You can set the scan rate (scans/second) and how many different input channels you want to acquire. This example has its own stop button; it should be a simple matter to add a manual start button. To manually set how long the application runs, you could add a 100 ms delay to each iteration of the while loop (recommended anyway to allow processor to multi-task) and add a control that sets the number
of iterations of the while loop.
For logging data, a great example is the �Cont Acq to File (binary).vi� example.
For different sample rate for different input lines, you could use two parallel loops both running the first example mentioned above. The data would not be able to be displayed on the same graph, however.
If you have more specific questions about any of the different parts of your application, let me know and I�ll b happy to look further into it.
Have a nice day!
Robert M
Applications Engineer
National Instruments
Robert Mortensen
Software Engineer
National Instruments

Which is the best structure for start/stop data logging?

Hi everybody,
hope I can explain my problem good enough that anyone can help me:
I have a VI which continuely shows on a graph the voltage of a Analog Input of a DAQ device. Now I want to allow the user to start/stop with a click on a button data logging. Means that a second loop writes to a selected path every ms the data to a spreadsheet file.
At the moment my VI works like this:
You run the VI and Labview asks you one time for the file path, then you can start and stop the data logging. But you can do it only one time. If you want to log a certain time later another file, you have to close and open the whole VI again which is not very professional...
My target is:
It is onlyl necessary to start the VI one time. Then you can select a new file path, log data, select another file path, logging data again....and so on...
Which programm structure is necessary, can anyone help me as a labview beginner with that issue? I attached the VI if someone just wants to edit that...
Thank you for your help!! Markus
Attachments:
Logging voltage.vi ‏93 KB
screenshot.JPG ‏98 KB

@NaruF1 and GerdW
you are right, there is a mistake, both loop rates should be the same (10 ms) :-)
@NaruF1
yes you understood correctly that the file dialog should appear every time the user wants to start writing a new log-file. The voltage we measure is a analog signal, so there will be several interesting periods we want to save for a later analysis in Excel.
To your 2nd point: if it works with a array it will be fine. But it must be possible to log data for lets say 5 minutes, so the array won´t be too large? (5 min @ 10 ms loop rate will be 30000 rows..
attached is the VI, saved as LV2009..
Thanx a lot!
@GerdW
..you ask why I didn´t create a structure like you recommended with notifiers or queues? The simple answer would be that I am not familiar with all this.. just began to write my first Labview programm. I will have al look to the LV help with all that stuff... Thank you a lot
Attachments:
Logging voltage.vi ‏80 KB

How can I display only the Data Logging pull down menu on my LV front panel?

Is it possible to hide all unused pull down menu on my front panel vi like File, Edit, View etc.. and only
display the pull down menu for the Data logging?!
best regards
Norick

Hey,
You can build your own runtime menu (Edit>runtime menu) and then e.g. only display the application items you want to.
Christian

Help please: DAQWare or data logging software (multichannel data capture) questions

I am writing regarding DAQWare, data logging software, and the PC-LPM-16
board, which a group of us a trying to come to grips with. This is rather
lengthy, I'm afraid...
We are a group of college students in a computer programmer/analyst
program. We have a course that involves doing a project to go through the
software development lifecycle (or as much of it as can be done in a term).
For our project we teamed up with a group in the industrial hygiene
program; they have a computer (standalone) with a PC-LPM-16 (PnP) DAQ board
and the NI-DAQ software (all of this has been around for a few years, but
has not been used much), and our goal was to capture the data they are
measuring (atmospheric pollutants) to an Microsoft Access database.
We are not familiar with DAQ systems, but were shown the software they had
installed. This included DAQWare (appears to be version 2.0). We thought
we could use DAQWare to log data to a text file, which we then would import
into the Access database. We came up with VBA code to parse the ASCII text
file created, but have run into one problem: DAQWare does not timestamp
each sample, but only puts a single timestamp in the header information.
Now we could extrapolate the time for each line based on the sample rate,
except that sometimes it seems to put in 8 values per sample, sometimes 12
values. For instance, in the sample of a text file below, the capture was
run for 1 minute at a sample rate of 60, and there were 480 measurements in
the file, or 8 lines of measurements per sample. (At a sample rate of 100,
we got 800 measurements in the file etc.) This was two weeks ago. Today,
we returned to capture more data, and DAQWare was logging 12 measurements
per sample (so at a sample rate of 100, we ended up with 1200 lines of
measurements). We do not know where this factor of 8 or 12 is coming from
or how it got changed in the two weeks between captures. We would like to
be able to have them just run DAQWare, for days on end if they wanted,
capture the data to file, then use our code to parse the text file into the
database, but if we cannot put timestamps on the readings, there seems no
point.
*** Example of a capture below... ***
DAQWare File
Version: 2.0
Number of Lines in Header: 10
Comment:
Date: 10-18-1999 Time: 10:01:39
Sample Rate: 60.0
Scan Rate: 0.0
File Format: 1
Samples per Channel: 480.0
Number of Channels: 5
O3 SO2 NOX NO2 NO
4 3 2 1 0
1 1 1 1 1
0.537 0.276 0.259 -0.017 0.015
0.537 0.273 0.261 -0.022 0.012
0.537 0.276 0.259 -0.037 0.012
0.537 0.276 0.264 -0.007 0.015
*** and so on... ***
Regarding this attempt to use DAQWare:
1. Can you tell us where this factor (8 or 12 or however many more readings
than we would expect) means, where it is read from or set?
2. Is there an updated version of DAQWare that we should download that
would be better?
3. Is there some other existing software that we can download to use to
perform basic logging of multichannel analog input to a text file (with
timestamp)?
I realise that the software comes with tools (DLL functions) that one can
use to create custom software to interface with the DAQ board, but in the
limited amount of time we have we are not sure we can learn enough about
these functions to write our own datalogging software.
However, to see if I could grasp the basics, I have looked through the
examples for Visual Basic and think that a program would run something like
this:
1. at the beginning, use LPM16_Calibrate to reset the board
2. configure acquisition with DAQ_Config
3. start acquisition with Lab_ISCAN_Start
4. loop to check is acquisition done with Lab_ISCAN_Check
5. once sampling done, write data out to file
6. loop back up to 3 to get next lot of samples
Unfortunately, a sample app using Access and VBA I created came back with
an error telling me it could not find nidaq.dll (even though this is in the
Windows system directory); probably it is not a good idea to try to do this
in Access in the first place. I am going to have a go using Delphi, which
I know a bit better.
One thing I am unsure of is what the numbers will be coming out of
Lab_ISCAN; the reference file seems to indicate they will be binary
readings, not voltages, and I wonder how to correlate these with instrument
measurements (the instrumentation people we going to set it up so that
1mV=1ppm).
Any help you can give to point us in the right direction would be
appreciated.
Sincerely, Marc Bell ([email protected])

I am writing regarding DAQWare, data logging software, and the PC-LPM-16
board, which a group of us a trying to come to grips with. This is rather
lengthy, I'm afraid...
We are a group of college students in a computer programmer/analyst
program. We have a course that involves doing a project to go through the
software development lifecycle (or as much of it as can be done in a term).
For our project we teamed up with a group in the industrial hygiene
program; they have a computer (standalone) with a PC-LPM-16 (PnP) DAQ board
and the NI-DAQ software (all of this has been around for a few years, but
has not been used much), and our goal was to capture the data they are
measuring (atmospheric pollutants) to an Microsoft Access database.
We are not familiar with DAQ systems, but were shown the software they had
installed. This included DAQWare (appears to be version 2.0). We thought
we could use DAQWare to log data to a text file, which we then would import
into the Access database. We came up with VBA code to parse the ASCII text
file created, but have run into one problem: DAQWare does not timestamp
each sample, but only puts a single timestamp in the header information.
Now we could extrapolate the time for each line based on the sample rate,
except that sometimes it seems to put in 8 values per sample, sometimes 12
values. For instance, in the sample of a text file below, the capture was
run for 1 minute at a sample rate of 60, and there were 480 measurements in
the file, or 8 lines of measurements per sample. (At a sample rate of 100,
we got 800 measurements in the file etc.) This was two weeks ago. Today,
we returned to capture more data, and DAQWare was logging 12 measurements
per sample (so at a sample rate of 100, we ended up with 1200 lines of
measurements). We do not know where this factor of 8 or 12 is coming from
or how it got changed in the two weeks between captures. We would like to
be able to have them just run DAQWare, for days on end if they wanted,
capture the data to file, then use our code to parse the text file into the
database, but if we cannot put timestamps on the readings, there seems no
point.
*** Example of a capture below... ***
DAQWare File
Version: 2.0
Number of Lines in Header: 10
Comment:
Date: 10-18-1999 Time: 10:01:39
Sample Rate: 60.0
Scan Rate: 0.0
File Format: 1
Samples per Channel: 480.0
Number of Channels: 5
O3 SO2 NOX NO2 NO
4 3 2 1 0
1 1 1 1 1
0.537 0.276 0.259 -0.017 0.015
0.537 0.273 0.261 -0.022 0.012
0.537 0.276 0.259 -0.037 0.012
0.537 0.276 0.264 -0.007 0.015
*** and so on... ***
Regarding this attempt to use DAQWare:
1. Can you tell us where this factor (8 or 12 or however many more readings
than we would expect) means, where it is read from or set?
2. Is there an updated version of DAQWare that we should download that
would be better?
3. Is there some other existing software that we can download to use to
perform basic logging of multichannel analog input to a text file (with
timestamp)?
I realise that the software comes with tools (DLL functions) that one can
use to create custom software to interface with the DAQ board, but in the
limited amount of time we have we are not sure we can learn enough about
these functions to write our own datalogging software.
However, to see if I could grasp the basics, I have looked through the
examples for Visual Basic and think that a program would run something like
this:
1. at the beginning, use LPM16_Calibrate to reset the board
2. configure acquisition with DAQ_Config
3. start acquisition with Lab_ISCAN_Start
4. loop to check is acquisition done with Lab_ISCAN_Check
5. once sampling done, write data out to file
6. loop back up to 3 to get next lot of samples
Unfortunately, a sample app using Access and VBA I created came back with
an error telling me it could not find nidaq.dll (even though this is in the
Windows system directory); probably it is not a good idea to try to do this
in Access in the first place. I am going to have a go using Delphi, which
I know a bit better.
One thing I am unsure of is what the numbers will be coming out of
Lab_ISCAN; the reference file seems to indicate they will be binary
readings, not voltages, and I wonder how to correlate these with instrument
measurements (the instrumentation people we going to set it up so that
1mV=1ppm).
Any help you can give to point us in the right direction would be
appreciated.
Sincerely, Marc Bell ([email protected])

Simple Date Format

Hi,
I have an entity object with some attributes, one of them is called "CREATED_ON", which i have specified as a history column (created on).
I have specified a format type of Simple Date in my Control hint and a format of dd-MM-yyyy. I then created a view based on my entity and dragged the view as an adf creation form. I also dragged a commit button to commit my record.
However, the date that is stored in my database have a non-zero time component (e.g. 10-JUL-2007 10:46:22). This is a problem becuase in my search form, the search criteria does not work (it requires the exact time also to work). I do not want to use TRUNC in my SQL query.
Instead i want the date to be stored with the format mask that i have specified.
Can you please help me?
Thank you

Do you really want to lose the time component altogether, or just make the query on date-without-time work?
There would be no way of recovering the information about when during the day the row was created if you truncate the time information, but it's possible to achieve if that's what you want. Both are possible to achieve.
To achieve the "losing the current time info forever" approach, add the following overridden method in your entity impl class that slightly changes the way the history attribute value is returned, in my case, for the HIREDATE attribute of an Emp example:
    protected Object getHistoryContextForAttribute(AttributeDefImpl attributeDefImpl) {
        Object ret = super.getHistoryContextForAttribute(attributeDefImpl);
        if (attributeDefImpl.getIndex() == HIREDATE) {
            ret = new Date(new java.sql.Date(((Date)ret).getValue().getTime()));
        return ret;
    }To achieve # 2 instead, just add a SQL-derived attribute to the view object with formula:
TRUNC(HIREDATE)and then use that sql-derived attribute in the query form instead of the normal HIREDATE attribute.

Data logging optimization function in LabVIEW and SignalExpress

Hello, everyone! I and a colleague have assembled the attached VI,
which is used to control a plant growth chamber, and I could use some advice.
I would like to add data logging capabilities, ideally to note (1)
environmental conditions, such as temp and CO2 level and (2) when certain
situations occur, such as high CO2 or low pressure (which results in a change
to the “Case Structure for CO2 and Pressure”).
The chamber runs for weeks at a time, though, so I have a constraint.
Instead of continuously logging all the environmental data (which would yield
giant file sizes), I want to be able to take “snapshots”, say every 5 minutes,
so I can examine the chamber’s condition over a long period of time.
I attempted to use the Time Delay function to control the Write Measurements
function (as in LabVIEW’s Cycle Analysis example, which I’ve also attached),
but Time Delay halted my entire program.
I also tried the Wait (ms) function, but had no success.
I recently discovered the powerful data review and reporting tools that
SignalExpress has to offer. Ideally, I
would like to use a SignalExpress express VI to record the measurements instead of the more primative Write Measurements, but, I’m not sure how to implement this in my VI. For example, would I make a data acquisition VI in SignalExpress for all my sensors, export to LabVIEW, and use that to replace the current DAQ structure in my VI? (Because the chamber VI is interactive, I'm pretty sure that porting the LabVIEW VI to SignalExpress wouldn't work out well.) And I’m
still not sure how to control how often it records measurements.
Any advice would be much appreciated!
Attachments:
Chamber VI.vi ‏789 KB
Cycle Analysis.vi ‏300 KB

Hi, Sarah. Yes I definitely plan to use LabVIEW for the majority of my data acquisition and logging. I apologize, I think I probably should have broken my post into two separate posts for clarity, as my major concern is being able to set how often LabVIEW logs the environmental data (viewing the logged data in SignalExpress would be nice, but not a requirement).
As I explained before, I'd really like to be able to set up a system that records the environmental condtions at regular time intervals, say every 30 minutes, or if my "Case Structure for CO2 and Pressure" status changes (such as from "Normal Conditions" to "High CO2".
As an example, attached is a boolean structure (TimedWritedMeasurements.vi) that I came up with to record a simulated signal every 5 seconds (5000 ms). Once I can get it to work, I would connect the boolean to my environmental sensor outputs and CO2 and Pressure case structure in my Chamber VI.vi that I attached in my first post.
My problem is I can't seem to get the Trigger and Gate function to work the way I'd like. I'd like the Wait (ms) function to trigger the Trigger and Gate function every 5 seconds to change the case structure in the TimedWriteMeasurements.vi to "True", thereby causing the Write Measurement function to record the environmental conditions. Then I'd like the case structure reset to false, until it's triggered to true in another five seconds. Can anyone point me in the right direction?
Attachments:
TimedWriteMeasurements.vi ‏84 KB

Data Logging a programmatically created shared variable of cluster or array datatype into citadel DB

Hi,
Is there a way to log a programmatically created shared variable of cluster or array datatype into citadel DB?
I have attempted to programmatically create a shared variable of type 'double' and was able to successfully log the same into Citadel DB. In the attachment, Please refer to the attached project SV_TC.lvproj and specifically to SV_W.vi for the code that i have used (W.png file shows the dB in MAX and shared variable in NI Distributed System Manager)
However when i tried the same approach to create a shared variable 'array of double', i noticed that traces are not getting created and hence data logging isn't happening into the Citadel DB. I was however able to write and read the shared variable array without issues. The same is true with cluster datatype also. Please refer to SN_NW.vi for the code that i have used - only difference from SV_W.vi is that i have tried to create a shared variable of type 'array of double'
One observation is that if i create an 'array of double' or cluster in a shared variable library using the project explorer and deploy, i could see that these being logged into Citadel DB.
Hence i want to understand what could be done to achieve the same programmatically? Could you please advice?
Regards,
Sridhar
Attachments:
SV_TC.zip ‏3925 KB

Why is the transaction happening over remote?
Because we need the information to be on our database immediately when they submit it.
I don't know anything about streams or replication.....
The web database is run by the company that hosts our web site. We use PL/SQL to show the pages and output the html. It fetches the data the customer is requesting from our database, but I'm struggling to get the best way to insert into our database from there.

What can be considered as the business logic of simple data entry form

Hi all,
I want to separate my applications logic into layers. It is a simple data entry form and doesn't contain any complex business logic. So I want to get this simple business logic to different layer. But the problem is, I cannot clearly identify what are business logic of this kind of simple data entry form.
How do I separate business logic of this simple data entry form to another layer?
any help is appreciated,
Thanks in advance,
Dil.

dcminter wrote:
It is a [form] and doesn't contain any complex business logic. So I want to get this simple business logic to different layer. But the problem is, I cannot clearly identify what are business logic of this kind of [form].Are you asking which bits are business logic?
Suppose that the data comes into your system immaculate from some external system. Imagine that it will go out into some other system. The bits that you would still have to write are your business logic.That's a nice practical definition. Thank you, I'm stealing it.
Also interesting to note that validation falls into that category... say you're recieving data from a magical external source... you still have to validate it.
And of course you'd still have to store it somewhere, ans retrieve it.
Yep, I definately like that definition.
Cheers. Keith.

Simple Data Base Program for Mountain Lion

Does anyone have a recommendation for a simple data base program that will import comma delimited fields from early versions of Filemaker Pro (v 3.0, v5.0)
The ability to import Filemaker Templates and Layouts would be a big plus.
I do not need the a highly sophisticated program just something with the ability to import data from several different data bases and create layouts that look like I want them to look.
Also what is the earliest version of Filemaker that will run well on Mountain Lion ?
Thanks....Ken

I suggest Bento (by Filemaker), simple database, imports Filemaker Pro files and doesn't cost very much

Help In keithley 2400 VI!!(Problem with the data logging and graph plotting)

Hi,need help badly=(.
My program works fine when i run it,and tested it out with a simple diode.The expected start current steps up nicely to the stop current.The only problem is when it ends,i cannot get the data log and the graph,though i already have write code for it.Can someone help me see what's wrong with the code?I've attached the necessary file below,and i'm working with Labview 7.1.
Thanks in advance!!!
Attachments:
24xx Swp-I Meas-V gpib.llb ‏687 KB

Good morning,
Without the instrument it might be hard for others to help
troubleshoot the problem. Was there a
specific LabVIEW programming question you had, are you having problems with the
instrument communication, are there errors?
I’d like to help, but could you provide some more specific information
on what problems you are encountering, and maybe accompany that with a simple
example which demonstrates the behavior?
In general we don’t we will be unable to open specific code and debug,
but I’d be happy to help with specific questions.
I did notice, though, that in your logging VI you have at
least one section of code which appears to not do anything. It could be that a small section of code, or
a wire was removed and the data is not being updated correctly (see pic below). Is your file being opened properly? Is the data being passed to the file
properly? What are some of the things
you have examined so far?
Sorry I could not provide the ‘fix’, but I’m confident that
we can help. Thanks for posting, and
have a great day-
Message Edited by Travis M. on 07-11-2006 08:51 AM
Travis M
LabVIEW R&D
National Instruments
Attachments:
untitled.JPG ‏88 KB

Simple Data Type in CAF of SAP NetWeaver DevStudio 7.1 SP3

Hallo
Anybody knows about the use of Enumeration for simple Data Type in CAF of SAP NetWeaver DevStudio 7.1 SP3?
I've defined an attribute "status" for the Entity "Project" with the following values
0: NEW;
1: ACTIVE;
-1: INACTIVE.
As you see the data type is short.
In the program I want to use the following code:
Project myProject = new Project();
myProject.setStatus(Status.NEW)
But I found it out, it is inpossible to to use Status.NEW.
On the other side I read the article of https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/085098ea-0c01-0010-12a8-80ac838bec85. This article is again not updated with the version 7.1 SP 3.
I cannot understand about the whole changes. In the previous release we can define a DDIC type and use it as Simple Data type and in the new Release we just use the XSD-Facet to define an enumeration, but the problem is: we can not reference it in the program. I don't see any advantage. And I tried to find out how I can define the attibute using DDIC type. I didn't get it.
Thanks for any Hints!
Kind Regards!
Ping

Hi Oliver,
Thanks for the reply!
I have login into the system, using User Id and Password.
I have tried unsinstalling everything but the result remains the same.
Previously only one service SAPCE_01 was showing up in the services explorer. But when I tried the
Instance 00:
sc create SAPRKT_00 binPath= "C:\usr\sap\RKT\SYS\exe\uc\NTI386\sapstartsrv.exe pf=C:/usr/sap/RKT/SYS/profile/CE1_SCS00_xxxxx" start= auto obj= "NT AUTHORITY\LocalService" password= abcd1234
Instance 01:
another service SAPCE1_00 was created. But when I tried to retry the instlattio, the installation again stopped at the point while starting the service and when I tried to retry it terminted with the following error.
Please guide.
sapinst.exe - Application Error
The instruction at "0x00cbf040" referenced memory at "0x0072006d". The memory could not be "read".
Click on OK to terminate the program
Click on CANCEL to debug the program
Selfextractor error
iaextract.c:888: child has signaled an exec error. Keeping directory C:/DOCUME1/I047488/LOCALS1/Temp/sapinst_exe.1448.1196681060
OK
Manish

I have an optical sensor and two hall effect how can I data log?

I have built a test rig which consists of a gyroscope. The gyro is spun up by and electric motor.
I need to measure the speed of rotation. I’m using an optical sensor and two Hall
Effect sensors. I would like to record the
output of these and I would like to build in some redundancy because there will
be another bigger rig that will require more measurement. E.g. vibration.
I’m new to data logging so I’m not sure which hardware I
should be getting.
Thanks

analog inputs are the most universal. with software such as the functions included in the Sound and Vibration Measurement Suite, you can analyze the analog input channel which is connected to your hall effect and optical sensors for frequency and speed. Vibration specific input cards will power accelerometers. with the speed and angular position sensors (hall effect and optical) you can combine this information with your vibration sensors to determine the movement of the device with respect to position and speed. These order analysis functions are part of the Sound and Vibration Measurement Suite.
What is more is that the Suite includes an assistant. The assistant allows for the capture and datalogging of all analog and digital inputs as well as frequency and vibration analysis. This is all configurable and does not require any LabVIEW programming. If you decide you want LabVIEW programming, all the functions are there to support LabVIEW as well.
Here is the link:
http://www.ni.com/soundandvibration/
Preston Johnson
Principal Sales Engineer
Condition Monitoring Systems
Vibration Analyst III - www.vibinst.org, www.mobiusinstitute.com
National Instruments
[email protected]
www.ni.com/mcm
www.ni.com/soundandvibration
www.ni.com/biganalogdata
512-683-5444

Data log file refnum - what is it?

Hello all,
i want know what is it data log file refnum and how to use it.
Thanks.

A datalog file is a file that stores data as a sequence of records of a single, arbitrary data type that you specify when you create the file. Although all the records in a datalog file must be a single type, that type can be complex. For instance, you can specify that each record is a cluster that contains a string, a number, and an array.
You could use a datalog file refnum if, for instance, you were creating a subVI which will be accepting a datalog file as an input. You could use this refnum to write to the file and perform other actions on it.
J.R. Allen

Simple Data logging applicatio​n wanted

Similar Messages

Maybe you are looking for

Simple Data logging application wanted