Measure with Keithley 2000 over RS232

[F._Schubert]

You still miss the termination char!

Felix 

[Dennis_Knutson]

Look at the page from the manual you posted. You have to include that '?' at the end.

[Broken_Arrow]

Anyone new to LabVIEW should get their instrument working with Hyperterminal first. It goes a long way knowing that the commands you send work the way you intend. Things like forgetting the question mark would not be an issue if it were all hammered out in Hyperterm first.

[RaZ22]

at first, i added the termination char....

second, my syntax is like this, fitting to the manuel but still not workin:

*IDN?
:MEAS: VOLT: DC?

[Dennis_Knutson]

Now that the syntax is finally correct, you need to debug the connection. As mentioned, Hyperterminal is perfect for this. Just send the *IDN?. If you get no response, check the com settings and the cable. I believe you need a null modem cable.

[RaZ22]

no i need no null modem cable, it mentioned in the users guide...

now i get an error from the keitly back, called: invalid character????

[RaZ22]

i tried it with hyperterminal, no response...cable and com settings are totally right...

maybe this keithley is defect...

i will try it with a new one tomorrow...

[Broken_Arrow]

We need a trumbone that makes that "Wahhh Waaaahhh" sound.

[wd8ivl]

Are you seeing the invalid character error on the Keithley (Error -213 I think).?

If so, then it is getting commands and the termination character.

The Keithley manual is structured a little odd, in that you have to build the command string.  If you leave off the prefix, it will give you that error. 

Try this -> send "MEAS:VOLT:DC?\n"  (without the quotes)

Good luck, 

Mike

Not sure why I see the smiley face in my post - should be "MEAS:VOLT:DC?\n" 

Message Edited by wd8ivl on 09-30-2009 11:43 AM

Message Edited by wd8ivl on 09-30-2009 11:45 AM

[Broken_Arrow]

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wd8ivl wrote:

Mike

Not sure why I see the smiley face in my post - should be "MEAS:VOLT:DC?\n" 

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That's a problem with the forum editor, it sees the colon+D as a smile. I thought they fixed it.