277: Cleaning the corrosion on terminal.
Repair screws. Test, - ok.
334: cleaning. Test, - ok.
392: changed all amplifiers, multiplexors and analog switches.
Calibrated.
502: new problem found: leakadge between input pin's.
1063: new screws are installed.
3782: Corrosion. Cleaning and calibration.
3811: Cleaning and calibration.