Compensation routine

[Denis Hodgins]

Hi, I am writing a compensation routine for a HP4914 Impedance Analyser. To
create the VI do I just follow thhe button presses, or are there any
statments to get data grom the unit.

Thanks in advance
Denis

[markwysong]

I'm not sure I understand what you mean by "follow the button presses". I'm making an assumption that your HP Impedance Analyzer uses HPIB for communication, in which the answer is yes, you will need to send some commands to the unit for it to send back data to the computer to analyze. Am I understanding your question properly?

Mark

[Denis Hodgins]

Hi Mark, The button process is press compensation, press open, HP anayser
takes measurement. Press closed, short wires, unit takes closed measurement.
You can then do testing using the machine.

I have written a VI that simulates this operation, the machine makes all the
correct noises but it does not do compensation. i.e. it does not hold the
values.

I then wrote another VI that uses thePull and RQS commands, this appears to
make compensation work, but when I then test a component using the machine,
the first results are utter rubbish.

Denis

"markwysong" wrote in message
news:506500000005000000FA600000-1012609683000@exchange.ni.com...
> I'm not sure I understand what you mean by "follow the button
> presses". I'm making an assumption
that your HP Impedance Analyzer
> uses HPIB for communication, in which the answer is yes, you will need
> to send some commands to the unit for it to send back data to the
> computer to analyze. Am I understanding your question properly?
>
> Mark

[Dennis_Knutson]

Without being familiar with the instrument, it sounds like your VI is missing a function or two. I'd look through the documentation on programming the instrument to see if there is a command to save values. The best place to get advice would be to contact Agilent. They won't be able to give you LabVIEW code but should be able to provide a list of all the necessary GPIB commands.