Controlling Voltage Ramp Time

[Ziad Ashour]

I am new to LabView and am currently running 7.0 professional. I am
looking for guidance, reference design, etc. that will enable the
following:

1. Use of an HP (now Agilent) E3631A power supply
2. Control ramp times of +5V up to 500ms+

I have installed all the required drives and have established
communication with the E3631A.

Best Regards,
ZA

[Russell_G.]

Ziad

There is a great example in Labview called �Output DC Volts.VI. Go to Help > Find Examples. If you search on �DC� you should be able to find it.

This example will at least give you an idea of how to start outputting DC voltages on your power supply. You can then modify your program accordingly.

What do you mean when you write that you want to �Control ramp times of +5V up to 500ms+�? Are you trying to create a custom waveform with your DC power supply? Any other information you can provide would be helpful.

Russell G.
NI Applications Engineer

[Ziad Ashour]

Russell,
Thanks for the reply. What I am trying to accomplish is creating a
test fixture with variable voltage ramp times of the +5VDC output of
my power supply... so yes, I am trying to create custom waveforms
using Labview. Any more expamples you have access to are greatly
appreciated.
Thanks Again!
Ziad

"Russell G." wrote in message news:<50650000000500000076690100-1079301409000@exchange.ni.com>...
> Ziad
>
> There is a great example in Labview called Output DC Volts.VI. Go to
> Help > Find Examples. If you search on DC you should be able to
> find it.
>
> This example will at least give you an idea of how to start outputting
> DC voltages on your power supply. You can then modify your program
> accordingly.
>
> What do you me
an when you write that you want to Control ramp times
> of +5V up to 500ms+ ? Are you trying to create a custom waveform with
> your DC power supply? Any other information you can provide would be
> helpful.
>
> Russell G.
> NI Applications Engineer

[Russell_G.]

Ziad

One method you may want to try is to use a combination of loops, sequence structures, etc. with the VI that sets the voltage level. Another suggestion is to use an array of voltage values to feed into the VI that sets the voltage level.

Hope this helps!

Russell G.
NI Applications Engineer

[Code]

Hi Russel,

I am using labview 6.0 to program my E3631a power supply. But I can't find any example programs. Could you post one in the forum? Thank you!

Richard Young

[Dennis_Knutson]

What kind of examples are you looking for? Did you download the driver from here [link removed; driver no longer available]. There are a couple of examples in the driver.

[Code]

Hi Dennis,

I have downloaded the labview drivers.I am trying to sweep voltages at a small step from two outputs of E3631A. The purpose is to measure I-V curves of an field-effect transistor. I use a Keithley 6485 picoammeter for current measurement. As I am at the beginning stage of labview program, I would really appreciate anyone could provide some example codes with E3631a, or current-voltage measurement in general. Thank you.

Richard

[Emilie S.]

Hi Richard:

If you download the drivers that Dennis linked above, you will get one Getting Started and two Application examples. After downloading the drivers you should put the folder in the instr.lib folder within your LabVIEW folder. Then if you go to your Instrument Drivers palette, which you can find within the Instrument I/O palette on your block diagram, you will find the examples.

These are going to be the most complete examples available.

Regards,

Emilie S.
Applications Engineer
National Instruments