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ins.: 2014-05-15 00:00; ( Age: 10 yrs )
By: Scientists
Category: COSC1

COSC: 2014-05-15

The Core Logger is multi-sensor again, with a lot of ...
The MSCL is back with a lot of tape and loctite.

The Core Logger is multi-sensor again, with a lot of tape and loctite. Drilling problems give room to think, although they aren't really favourable for the project. The hero of the day is Tina Kollaske from BGR - she reminded me how the MSCL at BGR works and how to instruct the instrument to lift the upper transducer - exactly what Bjarne remembered from our visit at BGR. Apparently, rolls are not for rolling, at least not on rock. Lifting the transducer from the rock surface is important for the transducer rolls’ survival! So now the sensors are mounted back on the MSCL, the only undamaged transducer is the rolling one in the lower holder (keep on rolling!), and the new-but-already-damaged transducer is, completely covered with electrical isolation tape, in the upper holder. Fixed with more tape against rolling it should always come in contact with the core at the same spot, and, thus, any effects of the tape should be accounted for by the calibration. Now we have to see how long this arrangement will last - 5 minutes or 5 months? I assume the oil will leak through the tape again sooner or later, probably sooner. But if we just get the refurbished transducer from Geotek in time we might be fine!