Problems with the driver for the HP E3631A

[Pauwels]

I have installed the driver of NI for Labview version 5.1.
I need to send information to a DC Power Supply ( HP E3631A), this information is just to set the output voltage for the HP E3631A.
I'm using the "getting started.vi" for the HP E3631A, normaly this must work !
I have called with support from NI,
But they couldn't tell me what the problem was !
The problem is that when I set the voltage on my PC ( using labview),
and run the getting started.vi, I always get the same outputvoltage from my DC Power Supply. ( HP E3631A ) ( +0.288V )
You first need to choose between +6V, +25V and -25V.
The strange thing is that when you change this, the DC Power Supply
changes correctly, follows these settings.
So the DC Power Sup
ply follow's the +6V, +25V and -25V when you change these, but always gives the same voltage when you set the outputvoltage.
Can you tell me what the problem is ??
Thanks in Advance !
Hope you can solve my problem !!!

[unkayged]

Can you check to see if after programming, the supply is in constant voltage or constant current mode. If the unit is in constant current mode, altering the voltage will not have any effect on the output voltage.

I got the same power supply a couple of weeks ago and experienced a similar problem with the -15V supply.

Hope this helps

[unkayged]

you can contact me on k.agyei@sstl.co.uk if you need any further help on the above

[Cyril]

Pauwels,

You may also check in the Configure Output.vi, which is one subvi of the Getting Started VI, and try to set the boolean for output(which is On=True by default) to false. I do not have the power supply, but my guess is that this boolean when set to true, only allows the predefined values.

Regards,

Cyril Bouton
Applications Enginneer
National Instruments

[BenBabb]

You need to make sure that you set the current value up high enough that the power supply does not go into limiting mode. This mode is supposed to protect the supply from sourcing to much current to your DUT. If the value is zero, than no voltage can "flow" and your supply goes into limiting mode. The max current the unit can source is 5 amps on the +6 volt supply.

I hope this helps.