keithley 2000 starting channel

[noamta]

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

[Matthew_Kelton]

Is the driver telling you the data is out of range, or are you getting an error (beep) from the instrument indicating the value is out of range?

If the driver is telling you the value is out of range, there is probably a bug in the driver where the user forgot to subtract one from or added one to the channel input when he built the command.

[noamta]

First of all thank you for your reply.

I get them both. I get the beep error from the instrument and at the same time this error message:
"Error - 1074001424 occurred at an unidentified location"
"Possible Reason: -222, Parameter data out of range"

When I press continue i get:
"Error 8 occurred at open file"
"NI-488.2: DMA hardware error detected"

What do you think?


Message Edited by noamta on 12-23-2007 06:06 AM

[noamta]

Well, I changed the driver and it keeps doing the same problem, only now i figured something new:

The driver chooses to measure from the first channel - as last.
It means that if choose to start measure from channel 4 to 8 it will go from channel 5 to 6,7,8 and then to 4.

Any suggestions?

[wha@atmel]

Hi

have a look to the simple Test.vi - how I have used KEITHLEY 2010 - DMM with this scanner-card.
Typically the Instruments from the "same Family"  behave in the same way.

Happy X - mas.

Werner

[noamta]

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.

[nitad54448]

hi
is a tcscan card ? i think in this one the first channel is used for cold junction compensation.
N

[noamta]

no. I have this one:

Model 2000-SCAN Scanner Card
  Ten analog input channels (2-pole)
  Configurable as 4-pole, 5-channel

[Rimasaurus]

Hi Noam,

Are you setting the scan mode for ke2000 Configure Scan.vi?  According to the context help for Starting Channel and Stopping Channel, these controls are only valid when "1: Internal" or "2: External" is selected in the "Scan Mode" control.  I hope this helps!

Regards,

Rima

[BrigGeneral]

Hello Noam,

A colleague of mine forwarded this issue to me and after researching the manual, I have an answer for you.  The range description for internal route scanning is confusing.  The manual says that the range could be from 1 to 10 but then says later on that it is from 2 to 10.  This is probably why the instrument will not let you select 1 as the starting range.  If you using a range of 2 through 10 will work, then I would suggest you stick with that.  Other than that, I can't see any more reasons for your problem.  Programmatically speaking though, the VI programming is sound.  Hope this helps.

Best regards, Phil.