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sweep problem with keithley 2420

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Hello,

 

I am having some problems configuring the Keithley 2420 to sweep a range of volts and measure the amps across a cell.

 

The attached vi checks the voltage polarity, then measures the short circuit current and then conducts a sweep.

 

The program executes but the sweep seems to measure resistance and not current.

 

Any help would be greatly appreciated!

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Solution
Accepted by topic author sinkovich

Incase anyone reads this, the problem was with the Keithley 2400 drivers not switching off measurement concurrent mode when configuring the measurement type. Even though I set the measurement type to amps it was still measuring ohms.

 

I still don't know why it defaults to ohms.

 

Anyway, I solved this by using the :SENS:FUNC:CONC OFF command with the Instrument I/O assistant after using the relevant Keithley driver VI to set all the other parameters.

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