Keithley 2000 driver parameter control question

Hi,
Im using keithley 2000 multimeter with labview and ran into some difficulties.
I defined a volt measurement read.
1.I couldnt find where to define the sample rate ( it seems to take 1 measurement per second but i need more and i know it can do up to 2000). Where do i define this?
2. I want to sample from 2 channels. I used the multiple read function. It made everything extremely slow + i couldnt figure out how it atores the data. How do i define exactly which channels to read?
Thanks

thanks for your reply.
a. i read the manual but it doesnt have a direct reference to labview integration.
b. i tried changing Power Line Cycles input but it didnt respond as expected. if i understand the parameter correctly when it is decreased its supposed to increse the number of samples per seconds. i tried changing it to 0.01 (the lowest possible) and it actually took more time per sample.
c. ill try configure scan or configure rout but i couldnt understand their functionality, is it like configure measurement? if i put this clock before the Read Data does the input change? do i get an array now?

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Keithley 2000 driver throws SRQs away?

Hallöchen!
For weeks I've had the problem that a multiple-point measurement
with the Keithley 2000 driver in LabVIEW (the older driver, not the
IVI one) caused very frequently timeouts. So I programmed a loop
that repeats the measurement as often as necessary, but not more
often than 10 times. You can see it at
http://www-users.rwth-aachen.de/torsten.bronger/lv1.gif
This was annoying and even failed to work for good recently. So I
investigated the problem further. The Keithley VIs rely on a VI
caled "_keithley 2000 Wait for SRQ.vi" that looks like this
http://www-users.rwth-aachen.de/torsten.bronger/lv2.gif
So, *before* the computer waits for the service request from the
device, exactly the same event is discarded. If I de
lete the two
"discard event" VIs in the block diagram, no timeout occurs any more
and the readout seems to work properly.
Now, did the Keithley programmers something wrong here or do I have
to be prepared for trouble?
Thank you!
Tschö,
Torsten.
P.S.: The newer ke2000 driver has its own very special problems
here.
Torsten Bronger, aquisgrana, europa vetus

Hello Torsten,
I have had time to investigate the problem and I was hoping you could test the attached instrument driver and provide feedback.
Thanks,
Matthew
Attachments:
ke2000.zip ‏701 KB

Is there a VI for controlling the integration time of a Keithley 2000?

Dear All,
I want to do some voltage noise measurements using a Keithley 2000, by taking a fixed number of data at different integration times of the A/D converter (different rates). Can you kindly tell me if there is a VI, which would do this for me or which subVI would be needed for construction of a VI that would carry out the task. Thank you and I look forward to hearing your suggestion.

If you are measuring DC, I found the VI "Ke2000 Configure DC Volts.vi" in the instr.lib. On the vi you can set the # of Power Line Cycles(integration time).
To search for the instr.lib for the Keithley 2000 (if using LabVIEW 8.2), on the front panel select Tools>Instrumentation>Find Instrument Drivers.
NI has many instrument drivers, if you search there and cant find what you need, then I would go to the programming manual for the instrument and write my own driver.
Brian
Brian
Attachments:
KE2000.LLB ‏1192 KB

Keithley 2000 serial driver

Hi !
I'm looking for LabView instrument driver for Keithley 2000 digital
multimeter with scanner card, using serial interface ?
Does anyone know how to get it ?
M.B.

In article ,
"Mr Bogus" wrote:
> Hi !
> I'm looking for LabView instrument driver for Keithley 2000 digital
> multimeter with scanner card, using serial interface ?
> Does anyone know how to get it ?
>
> M.B.
contact Dale Cigoy at keithly
[email protected]
he was pretty helpful when I needed help with VI's for the 2700
aleal
Sent via Deja.com http://www.deja.com/
Before you buy.

Keithley 2000 DMM AC Read Overflow

I’ve been having problems controlling a Keithley 2000 DMM during AC volts measurement using IVI. When reading AC Volts the DMM will intermittently sense an ‘overflow’ and return the value NaN. I’m using IVI and TestStand 3.0 but get the same problem with IVI and LabWindows 7.0.
The set-up is as follows:
Device: Keithley 2000 DMM, GPIB device number 6
Device interface: GPIB, DMM set-up in MAX as GIPB0::6::INSTR
IVI Driver version: 3.02, downloaded from the NI web site
IVI Compliance Package version: 2.1
NI-488.2 version: 1.70
NI-DAQ version: 7.1.0f1
MAX version: 3.0.2.3005
For test purposes I’ve connected the DMM front panel input high and low and set the inputs mode on the Keithley to front, this should mean that I get a very low Voltage reading. I’ve then run the LabWindows/CVI IVI control sample code provided with the IVI driver. At the initialisation panel I’ve entered the logical name. At the configuration panel I’ve selected Volt AC measurement but left everything else as default. The second configuration panel I’ve left as default. At the Read panel I’ve left all setting as default. Pressing the read button up to about 20 times with about a second gap in between each press will eventually lead to an ‘overflow’ reading.
Any help/explantion will be appreciated
Steve

Here are the results of my investigation into this problem, it’s two fold:
1. Keithley have informed me that their engineers in the US have just seen the problem I’ve been seeing and are working on a firmware update. Currently here is no date for the release of the updated firmware but I’ll be informed when this it’s ready.
Note: I’ve found that the read AC Volts overflow problem only occurs when the read trigger delay is set to zero seconds.
2. The TestStand DMM IVI configuration step always sends a trigger delay of zero seconds regardless of the trigger delay set.
In my TestStand sequence the DMM IVI configuration sets the read trigger delay to 3 seconds but as noted above this is sent a zero seconds thus invoking the Keithley DMM AC Volts read overflow problem.
See attached VISA call log captured by NI Spy. The first 22 call are made when the DMM IVI configuration step is called form TestStand the next 22 calls are made by the IVI DMM sample code configuration provided by National Instruments when DMM configuration is run thorough LabWindows. Note call 12 (IVI DMM TestStand) has the trigger delay set to zero seconds (should be 3 seconds) and call 34 (IVI DMM LabWindows) has a delay of three seconds.
I’ve found a workaround as follows:
After each call to the TestStand DMM IVI configuration step an additional step that calls the TestStand IVI Tools step can be added. The IVI Tools step can be set-up to specifically configure the DMM Trigger Delay to 3 seconds. I’ve proven that this individual call does in fact send the correct trigger delay command to the DMM thus alleviating the AC Volts read overflow problem.
Can NI confirm that this problem does exist with the DMM IVI step and when they plan to fix it. I’ve attached the TestStand sequence file that I’ve been using to investigate the problem.
Thanks
Steve
Attachments:
DMM Overflow.zip ‏9 KB

Interfacial connection to Keithley 2000 thro' GPIB-488

Hi all,
Pls give me some ideas about interfacial connection to Keithley 2000 through GPIB-488.
I dont 've a clear understanding of what to do next...
Regards,
Partha,
- Partha
LabVIEW - Wires that catch bugs!

Hi Partha,
Have you downloaded the LabVIEW driver for the Keithley 2000? If not, you can find it here. Simply download the appropriate version for the version of LabVIEW you have, install as directed, and you will have the functionality of the instrument in the form of subVIs. Most instrument drivers install example programs as well that you can try out.
Let me know if you have any questions!
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Applications Engineer
National Instruments

'Driver]Parameter missing' Error while trying to pass parameter to MS query & Return Data to Microsoft Excel

I am trying to set up a parameter query using ODBC-Microsoft Query
to BMC Remedy The ODBC connection is "AR System ODBC Data Source".
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Please help

Hi,
Based on the error message, I recommend we try the suggestion: Replace all "..." with [...]
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We may try the workaround: Write an Excel macro which connects to the database and fetch the data based on the SQL query.
Please Note: Since the web site is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.
If you have further question about write macro, I recommend you post the question to the MSDN forum for Excel
http://social.msdn.microsoft.com/Forums/en-US/home?forum=exceldev&filter=alltypes&sort=lastpostdesc
The reason why we recommend posting appropriately is you will get the most qualified pool of respondents, and other partners who read the forums regularly can either share their knowledge or learn from your interaction with us. Thank you for your understanding.
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It's recommended to download and install
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Acquiring a measure every x seconds from a Keithley 2000 multimeter

Hi everybody,
I'm working on a program on labview which should acquire a measure every x seconds from a Keithley2000 multimeter.
I managed to acquire a single reading using the "Single Read VI" from Keithley 2000 Instrument Drivers.
To acquire a reading every x seconds, i have tried 2 possibilities without havinng the desired result:
- First i have tried the "Multi Read VI" (also from Keithley Instrument Drivers), but the problem with this VI is that i could controle the desired number of readings without being able to controle their frequecy ( i can't choose the elapsed time between 2 successive readings)
- The second possibiltie I've tried is to use the "Single Read VI" inside a "Timed loop" for which i could choose the desired number and frequency of iterations, but the problem with this methode is that
at the end of the program i still get only a single reading!
Can sombody please help me with that?
THANK YOU in advance.

Hello,
As dennis said, I think you made a mistake in your code.
Could you post your code for us to see what you're doing wrong?
Regards,
Olivier L. | Certified LabVIEW Developer

Keithley 2000: Strange timeouts

Halloechen!
I have to read multiple values from a Keithley 2000 (DC volts data),
and even that has to be done multiple times. So I did the
following:
1. ke2000 Initialize.vi
2. ke2000 Configure DC volts.vi (no parameters, only "DC Volts"
selected from the pull down menue)
3. In a loop:
a) ke2000 Configure Trigger.vi with a proper calculation of the
timeout (taken from a Keithley example code)
b) ke2000 Data Read Multiple.vi (with the correct number of
readouts)
c) ke2000 Reset.vi
4. ke2000 Close.vi
Unfortunately, with this programming I get timeouts regularly.
Well, not always but every other measurement say. If I increase the
timeout time, it simply takes longer, but the timeout is inevitable.
When it
happens, the Keithley seems to be unable to leave 3 b).
Then I created a WHILE loop that repeats the measurement if there
was a timeout. But the loop is repeated until I stop the program.
However: If I take the initialisation vi *within* the loop, it
works! I still get timeouts, but now it cleanly repeats the
measurement and proceeds.
But this is neither elegant nor fast. Apparently some delays are
missing. Does anybody know where to put them? Where is the
critical phase for the instrument?
Or is it something different?
Thank you!
Tschoe,
Torsten.
Torsten Bronger, aquisgrana, europa vetus

I find this rather interesting. I ahve some older drivers for the KE2000 and they work without problem. But when I seen your question it rasised an interest because you said DC volts from the pull down. I went and downloaded the drivers from NI and installed them wrote just a simple program from them and sure enough the problem is there just like you said it was. I also found that if you do not use the initialize vi it works fine without the timeouts. Seems that the initialize vi is putting the instrument in a funny mode. Anybody have any Idea of wht this is happening.Will do some investigating and get back to you.
Joe
Joe.
"NOTHING IS EVER EASY"

Keithley 2000 voltage measurement

Hi,
I want to write a code to display the voltage measured from a keithley 2000 meter using RS232 serial port and display it on a graph using Labview 8.5 on Windows Vista based Laptop
. I guess the first step is to download the driver for keithley2000 http://sine.ni.com/apps/utf8/niid_web_display.model_page?p_model_id=248. I want to go step by step. Please give me the main key steps on how to proceed on this problem and i will then work in detail based on your directions.
How do i know that laptop is recognizing the meter and RS232 connection is sound? What are the next key steps i need to work on? Please give the directions.
Thanks

For fast reading, it is important not to use the MEAS? command, but READ followed by FETCH? (if I remember correctly). Normally these DMMs operate at 1 PLC (power line cycle -> 50/60 Hz), so you need to adjust the NPLC (number of power line cycles).
There is to options to work with the Keithley DMMs inside LabVIEW. You could use the LabVIEW drivers for the Keithley 2000, those can be found on ni.com and on the keithey homepage. Propably they only implement GPIB, the you need to make some modifications on them for RS232. The other option is to send the commands as found in the DMM manual via VISA.
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www.aescusoft.de
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Keithley 2000 current measurement

Hi All,
I am using keithley 2000 DMM to measure current. I have configured the DMM under IVI Drivers in MAX. I am using the example program in CVI to configure and read the current drawn. When I read the current drawn from the DMM the current value displayed is incorrect. I have used the auto adjust to zero function also. Even on multiple readings with delay, the value keeps fluctuating and is no where near to the expected value. Can anyone suggest why I am not able to read the correct value? Where can I find the configuration parameters for this DMM in MAX? How do I know if I have configured the DMM correctly in MAX or not?
Any pointers would be helpful.
Thanks in Advance,
Pradeep

Hi Pradeep,
Try downloading the drivers for the Keithley DMM from http://sine.ni.com/apps/utf8/niid_web_display.model_page?p_model_id=248
Nxt question is as to how you are connecting the DMM to your PC (serial, gpib??)
If you have connected over GPIB, verify that it is showing in MAX under devices and interfaces.
You can then right click on the instrument and select communicate with instrument. Use simple commands that should be available in the manual to read data from
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Regards,
Denver
AE, NI India
Message Edited by denver_ on 11-24-2008 07:46 PM

Keithley 2000

Hello,
I am having a problem with connecting Keithley 2000 with Labview. I downloaded the driver from Ni , however when I run it, the error syntax occur Error +800 in the Keithley 2000. It does not do any measurement. Would you like to help me to deal with this problem?
Thank you very much.!

Hi stranger1!
I have some steps that might help you:
First, make sure you have the 488.2 driver installed for GPIB.
http://joule.ni.com/nidu/cds/view/p/id/3786/lang/en
Second, make sure the device shows up in NI MAX and you are able to communicate with it there.
http://www.ni.com/gettingstarted/setuphardware/instrumentcontrol/gpibconnect.htm
Are you using the IVI driver or the Plug and Play driver?
IVI: http://www.ni.com/white-paper/3377/en/
Plug and Play: http://zone.ni.com/wv/app/doc/p/id/wv-1426
You also might find the information in this forum post useful:
http://forums.ni.com/t5/Digital-Multimeters-DMMs-and/How-do-I-interface-with-a-Keithley-2000-multime...
If those documents are not able to solve your problem, we might need a little bit more information. IVI or Plug and Play? You say you try to run the driver—do you mean a particular VI or example included in the driver? The error you are getting is a SCPI error (http://forum.keithley.com/phpBB3/viewtopic.php?f=13&t=70)—are you sending a particular command to the device?
Regards,
Kelsey Johnson
Applications Engineering
National Instruments

Keithley 2000 starting channel

Hello all,
I am using LabVIEW 8.0 connected to Keithley 2000 DMM with 10 channels scanner card.
For configuration I am using the "configure scan.vi" from the appropriate driver.
The "starting channel" option is capable of having numbers from 1 to 10 (for internal card).
I choose to start from channel 1, but the scan opearation keeps starting from channel 2!
I tried setting the starting channel to be 0 but then I get an error message saying "data out of range".
Does anyone have an idea?
thank you,
Noam Tal
Ben-Gurion University
Israel

There is no Test.vi there.
Anyway I tried running the scanner.vi but it does too many errors and I couldn't find a clue to my problem.
My scan8.1.vi is attached. It is very simple.
If you could take a look and try figure it out i would be grateful.
Attachments:
scan8.1.vi ‏31 KB

Keithley 2000 with AD007

I am new to LabView and am attempting to write a program that will record data from a keithley 2000 digital multimeter. So far I can only send "one-shot" commands to read the data. However, my expermiment requires readings to be taken many times a second. I am communicating with the multimeter via a AD007 Tektronix GPIB Lan Adapter. The LabView version I am using is Labview 6.1. If anyone has any idea on how to send GPIB commands to the multimeter using a labview interface, it would be GREATLY appreciated.
Robert

I'm not sure what's in this driver that requires IVI 2.0. I use other IVI drivers with 1.83 that you can get Keyword Search: Keithley. If that doesn't work, you could try the LabVIEW driver for the same instrument.Message Edited by Molly K on 02-18-2005 11:55 PM

Problem in Accession inner join with [Microsoft][SQLServer 2000 Driver

Hi
Can you tell me what can be cause my sql statement is correct gives result but
if i used below statement in my JSP ,cause error
1)
ps1=connection.prepareStatement("select RQM_IN_RQSTN_ID_PK,RQD_IN_ITM_ID_FKPK,RQD_VC_ITM_DSCRPTN,RQD_IN_STTS_ID_FK,C.SMT_VC_STTS_NM,a.RQM_DT_PRPSD_DLVRY_DT"+
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"where a.RQM_VC_DTRTMNT_INVLV='Technology' ");
2) Error Generate
java.sql.SQLException
[Microsoft][SQLServer 2000 Driver for JDBC][SQLServer]Line 1: Incorrect syntax near 'a'.
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ps1=connection.prepareStatement("select
RQM_IN_RQSTN_ID_PK,RQD_IN_ITM_ID_FKPK,RQD_VC_ITM_DSCRP
TN,RQD_IN_STTS_ID_FK,C.SMT_VC_STTS_NM,a.RQM_DT_PRPSD_D
LVRY_DT"+
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RQD_IN_STTS_ID_FK = 4"+
"INNER JOIN PAS_SMT_STTS_MSTR C ON
C.SMT_IN_STTS_ID_PK=B.RQD_IN_STTS_ID_FK" +
"where a.RQM_VC_DTRTMNT_INVLV='Technology' ");This is a problem due to not providing spaces where they are needed. See the places where I have highlighted.
A better way is to generate the String first [use StringBuffer as a good practice for appending instead of String "+"] and print it out to check if it is correct.
***Annie***

Keithley 2000 driver parameter control question

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