Instrument Control (GPIB, Serial, VISA, IVI)

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Switch between pxi4130 current ranges fast?

 

PXI 4130 current level has these ranges (among others):

a) 4mA to 200mA

b) 400uA to 20mA

 

First I want to source 50 mA (first current range).

Then I want to switch to 100uA (second current range) as quickly as possible.

 

I do not need the full accuracy available. Error on either current (+/-10% even) would be acceptible if it were repeatable.

 

Is it possible to get from (a) to (b) without disconnect/reconnect or stair-stepping the current and range to an overlapping value?

 

 

 

 

 

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PS LabWin CVI

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While in the running state, you can edit the source configuration dynamically using any VI, function, property or attribute listed in the following tables.

 

-Ciao 😉

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Thanks, but that does not help.

 

While it is true that you can edit the source configuration dynamically with those functions, I do not see how you can use them to change source current between ranges without disabling or stair-stepping.

 

Try 1:

Source current 1 (OK)

Source current 2 (ERROR: new current not in the old current range)

 

Try 2:

Source current 1 (OK)

Adjust current range (ERROR: new current range does not contain the current still being applied)

 

 

What I don't want:

Source current 1 (OK)

Disable output (OK)

Adjust current range (OK)

Source current 2 (OK)

Ensable output (OK)

 

Or:

Source current 1 (OK)

Source a middle current that works for both ranges (OK)

Adjust current range (OK)

Source current 2 (OK)

 

I think Im SOL.

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