77210163GB Issue 3
48
Grip the fluorescent tube firmly, rotate it 90°, and pull it towards you to slide it from the
end connectors.
5.5.2
TO fIT A LAMP TUBE
Hold the replacement tube firmly at the ends and align the connector pins with the slots
at each end of the fitting.
Carefully push the tube into place.
Rotate the tube a quarter turn.
Fit the shade into its two keyhole slots and push it into position.
Tighten the two screws that hold the shade, and replace the top cover.
5.6
ELECTRICAL PROTECTION
The mains input supply feeds the Cryotome via a trip device that interrupts the
electrical supply to the instrument if an internal fault occurs. The trip replaces the
function of a fuse.
When the electrical protection device trips, the mains switch goes
to its
O position (OFF) and the instrument becomes inoperative.
If the protection circuit operates, this will normally indicate a compressor problem.
Check that there is adequate space around the outside of the unit for cooling air and
that the inlet grill on the right hand side is free of obstructions and dust. Allow 1 hour for
the compressor to cool before attempting to reset the trip circuit.
Press and release the
I side of the mains ON/OFF switch to switch the instrument on
again. If the protection circuit keeps tripping the switch, contact your Thermo Service
representative.
Содержание Cryotome
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