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I'm trying to set a Keithley 2602 as a potentiostat for cyclic voltammetry.
I generate a triangular waveform from 0, to potential 1, to potential 2 and then go back to zero. This waveform depends of frequency and scan rate
I want to input this waform on the keithley. i'm used to "DAQmx write", daqmx timing and daqmx read. Are there equivalent drivers in which we can input rate, waveform.
Thank you for your answers
- Keithley Applications
- Posts: 204
- Joined: May 18th, 2012, 12:12 pm
- Country: United States
- Location: Cleveland, Ohio
Are you using a 2602, 2602A, or a 2602B?
We do have LabVIEW drivers for all three instruments. You will have to set up a voltage list sweep and input the voltage points comprising your waveform. The number of points depends on how closely you want the output to linearly ramp. The timing will be controlled by the sweep delay.
Here are the 2602B Native LabVIEW drivers: https://www.keithley.com/support/keidoc ... are+Driver.
Here are the 2602A Native LabVIEW drivers: https://www.keithley.com/support/keidoc ... are+Driver.
Here are the 2602 Native LabVIEW drivers:www.keithley.com/support/keidoc_searchr ... are+Driver
(Sorry, there can only be two URLs in a post, you will have to copy and paste that third one)
The 2602 will work slightly different. It does not have a trigger model so each point will have to be manually updated. Timing concerns may require a script to be written and stored on the 2602 and later called from LabVIEW.
Please refer to the Reference Manual for your instrument for more details on setting up sweeps.
I'm using a 2602a. The aim of the program is to input a ramp voltage between working and counter electrode and to measure the current (channel A), and, in parallel, measuring the potential between working and reference electrode (channel B).
There is my Labview program in attachment.
Inputting voltage of the waveform is working but what I also wan't to do is to control time between each ramp voltage input for slow scan
(for fast scan i will be limited by the sweep delay as you precise)
For example with parameters :
- initial/final potential =0
- Eswip1 = 1
- Eswip2 = -1
- scanrate =0.1
- input rate = 1Hz
I should input 40 sample in 40 seconds with a 1 second delay between each input.
How can i do that? As you can see I've tried to put a "config timer" linked to the rate but I think my connections are wrong somewhere
Thank you for your help
If I've well understand I can set the NPLC to a lower value to increase the sweep rate. I'll try that and let you know what happen
Were you bale to successfully use your LabVIEW Script with 2602A for Cyclic Voltammerty application.
Did you use both the channels A and B to source the voltage and measure current and plot curve.
One of the Indian Institute of Technology Delhi user is trying to emulate your application.
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