Tuesday, February 10, 2015

February 2015 maintenance

Following the annual maintenance check conducted over the period 10-13 November 2014,  a further check was conducted from 4-5 February 2015.  The buoy was brought to shore and most instruments were functioning and we had no problem connecting via RF but there was no cellular connection. TheRMY tem/RH MET sensor previously removed in Nov 2014 for servicing was successfully re-installed.

The EXO2 sonde was calibrated and reinstalled.  The Conductivity/Temp sensor seems to be defective.  Temperature reading were quite low (as much as 15 deg C below ambient- ambient was checked against a handhelp YSI temp/conductivity probe). This seems to be a recurring problem. OIn september 2014 the Cond/Temp probe was found to be faulty, which was eventually returned to and replaced by YSI.

Minimal fouling was noted, but the unit was repainted with anti-fouling paint.  All anodes and copper coating seemed intact. and the probe would not calibrate conductivity. All was downloaded from both loggers.