I am having a hard time understanding the values i am getting on the anodic protection system of our (99.99%) Sulfuric acid storage tanks. It has three electrodes with references of -600mV; -398mV and -410mV. on the terminal reference input it is giving -0.42V for each of the electrodes. The system is in alarm but not specifying why is in alarm.

 

What's your acid temperature and the tank material?

 

What's your acid temperature and the tank material?

Tank material is stainless steel. Temperature should be in the 30s or atmospheric. storage capacity is 10 000 tones.