agilent current source can not reach higher voltage

[adgurrol]

hi i have an agilent B2901A current source and im trying to out put 100V... since its capable to about 200V but i can go abouve 21V. When i enter anything about 21V it only sends out 21V. Anyine know how to fix this. Is it my compliance values or range?

Thanks in advance

[camerond]

What current is it putting out @ 21V with your circuit?

Cameron

[adgurrol]

about 21mA... its set up with a aproximate 1kohm resistor

[kbbersch]

Are you using two channels?  Looking at the data sheet for the instrument it appears you can't use more than 21V if using 2 channels.  I haven't looked at the manual for it so I could be wrong.

[crossrulz]

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@adgurrol wrote:

about 21mA... its set up with a aproximate 1kohm resistor

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If you are set up as a constant current source, then you should be putting out 21V (21mA*1kOhm = 21V).  Looks like it is working exactly as it was designed.

If you truely want 100V out, then you need to change it to a constant voltage source and increase your compliance current to at least 100mA.

[adgurrol]

no just 1 channel.

[adgurrol]

i believe i do have it set up as a constant voltage source and even when i do it manually and not through labview i can not seem to go above 21V even witht the complaince surrent at 100mA or higher?

[Dennis_Knutson]

If you can't do it manually, then you don't have a LabVIEW problem. You need agilent tech support.

[adgurrol]

so i got it so i can go higher manually but i cant go as high through labview as i was manually... the higherst i got manually was 42V with 100mA limit

[adgurrol · Accepted solution]

ok nvm i figured it out thanks for all your help it turns out if i want to go above 42V i need an interlock terminal. the problem through labview was mu limit compliance was too high.