CP 1 – Cathodic Protection Tester Course Manual
© NACE International, 2000
07/01/04
Chapter 2 Appendix 1
Reference Cell Maintenance
Reference cells require attention if:
1. The solution is cloudy or appears contaminated; or
2. The copper rod is not bright and shiny; or
3. Copper sulfate crystals are not visible; or
4. When compared to a standard cell there is significant difference potential
Contaminated Cells
To restore reference electrodes for proper operation perform the following steps:
1. Remove the reference cell tip, rod and end cap, and properly dispose of the
fluid contained in the cell.
2. With non-metallic abrasive material (sandpaper), clean copper rod to a bright
and shiny condition.
3. Re-assemble rod and end cap.
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