A newly-calibrated CT was deployed on March 22, 2010, and within four days it had failed. It was later discovered to have flooded and was discarded as irreparable. It is not certain why it failed.
In any case, plans were quickly made to repeat the events of March 22nd, when the entire system was powered down so that the CTs could safely be swapped underwater. This was scheduled for April 16th, 2010. At the same time, a new program was updated to fix a configuration issue with the transmitter (it had been reporting on the wrong PID, a data-processing inconvenience) and add some more granularly reporting data tables (5-second and 30-second averages, maxima and minima).
This time the new CT worked fine, and the programming/transmission changes had their intended effect.