Instrument Control (GPIB, Serial, VISA, IVI)

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keithley scan 2000 delay time

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I'm updating some legacy code into Labview that was written for a Keithley Scan 2000 DMM with 10 channel relay card.  Right now, the code contains a delay between selecting a meter channel and reading the data out.  The delay is 1 second.

 

I haven't been able to find any documentation supporting why this delay needs to be in place.  Is it just for debouncing?  If so, does anyone have any experience that suggests it could be shorter?

 

Thanks.

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Ro ma wa ichi ni chi ni shi te na ra zu
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Accepted by topic author gdecker

The delay depends on your system. For debouncing 20 ms is more appropriate.

But you can try. Build scans between max, min and small signals and see how fast the system gives the correct answer.

One other reason for having a delay is autoranging of the DMM, sometimes that takes some time and also load on your system should stabilize.

greetings from the Netherlands
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Thanks.

 

Autoranging shouldn't be an issue, since all the voltages will be within half a volt of each other, and everything will be less than 5V.

 

 

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