Display EG&G M270 Cyclic Voltammetry data using LabVIEW

[roadchem]

Overview
The Display M270 CV file.VI opens, parses and displays cyclic voltammetry data recorded with EG&G M270 software.  The scan rate is indicated on the front panel. These examples also included the "general file display.vi" which is a much more general means by which to display x-y data.

Description
When the CV file must be saved in ASCII format.  The original M270 software can read binary files and re-save them as ASCII if the default setting is correctly set. The program displays only CV data.  Other data types may be displayed but will require minor modification. A sample CV file (13MAYBC) is included.  The data was collected on a 1.0 mM solution of ferrocene in 0.1 M NBu4PF6 / CH2Cl2 at a 3.0 mm Pt electrode, Ag/AgCl reference electrode, and a Pt wire counter electrode at a scan rate of 50 mV/s.  The potentiostat was a EG&G Model 263A interfaced to a PC via a GPIB interface.  The data shows the expected reversible couple.

The M270 software was developed in the mid-80's for GPIB-interfaced potentiostats which include the EG&G PAR Model 263, 273 and Versastat.  It still functions well for these instruments, and is in use in many labs.

Requirements

Software:

1. LabVIEW 2012 (or compatible)

Steps to Implement or Execute Code

1. Specify the data file path
2. Run the application.

Additional Information or References

VI Snippet

 **This document has been updated to meet the current required format for the NI Code Exchange.**

[sirino99]

I am a Ph.D. student and new to LabVIEW. I am working on electrochemical measurements and need help implementing a program that calculates conductivity and thickness, similar to a potentiostat for Cyclic Voltammetry (CV).

I am using a Keithley 2400 Source Meter with a two-electrode setup, but the example I previously downloaded does not include the required functionality.

• How can I modify or create a LabVIEW VI to control the voltage sweep, measure the current response, and calculate conductivity?

• What is the best way to estimate thickness from the obtained data?

• Are there any existing LabVIEW examples or libraries that can help with this?

I also have images and experimental data that might clarify my requirements. Any guidance or recommendations would be greatly appreciated!

Thank you in advance for your help.

With the fact that I am using only two electrodes and do not have a third one, who can help me modify the program so that I can perform the calculations?