B & G 390 System - Log Calabration Question
Any one out there still use a B & G 390 system?
I want to check the calibration for the log & been over the measured mile a few times & worked out the correction factor. I want to enter this into the system, however when I follow the instructions in the manual & press the "shift" key to envoke the calabration section, the MDU goes blank (MDFs stay on...), I press "shift" again & the MDU comes back to life. It is like the MDU is going into a sleep mode or something. I can't find any mention of this in the manual.
The control unit for the depthsounder behaves in the same way so I don't think there is a fault with the system.