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Troubleshooting
This section of the manual is organized as a list of problems that you may encounter. Following each problem is
a list of some possible causes for that problem. Neither the list of problems nor the list of their causes is
comprehensive.
This troubleshooting guide only applies if you are running a potentiostatic experiment on the
cell. Galvanostatic experiments show different symptoms.
Very small current or no current when you run an experiment, but no overload indication
•
The working electrode (green) lead in the cell cable is not connected to the cell properly.
•
There is a gas bubble completely blocking the face of the working electrode.
Stop the experiment, fix the error, and restart. The working electrode is not damaged.
Very small current or no current when you run an experiment, with a control amplifier overload
•
The counter electrode (red) lead in the cell cable is not connected to the cell properly.
•
The counter electrode is partially pulled out of the cell.
Stop the experiment, fix the error, and restart. The working electrode is not damaged.
Full-scale current and voltage when you run an experiment, many overloads
•
The reference electrode (white) lead in the cell cable is not connected to the cell.
•
The working sense (blue) lead in the cell cable is not connected to the cell.
•
You have incorrect experimental settings (e.g., wrong potential).
•
Two of your electrodes are shorted together.
•
There is a gas bubble in the Reference Bridge Tube.
Large currents have passed through the working electrode. It may need to be resurfaced or replaced.
Noisy Cell Current – overloads may be present
•
Your de-oxygenation gas is still bubbling through the solution.
•
You have a high impedance in the reference electrode path.
•
There is a gas bubble in the Reference Bridge Tube.
•
You are picking up noise: try a Faraday cage.
Excess back pressure required to bubble deoxygenation gas
•
No path is available for the gas to escape.
Poor Experimental Reproducibility
•
A poor working electrode seal is leaks the test solution.
•
Your cell, solution, or working electrode surface has a contamination problem. Carefully clean the cell
and components. Avoid touching the wetted surfaces of these parts.
TroubleshootingAddition of a pH Electrode
17
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