Leica Biosystems LN22 - Manual (Page 23)

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• Place the tip of the screwdriver into the small recess on the left of
cover (3) and push very carefully, using the screwdriver as a lever, to
remove the housing.
• Pull out the housing (3) together with the fuses (4) and the voltage
selector insert (2).
• Remove the voltage selector insert (2) from the housing (3).
• Insert 2 fuses (4) (both of the same specification) which are appropri-
ate for the voltage in your lab (see instrument name plate for corre-
sponding fuse value).
• Put the voltage selector insert (2) back into the housing (3), so that
the desired voltage shows in the indication window (16) of the hous-
ing.
• Reinsert the housing (3), together with voltage selector and fuses,
into the instrument and push lightly until it locks in place.
• Check whether the correct voltage now shows in window (16).
4.5.3 Plugging in the connection cables
• Connect the cryochamber (15) to the control unit (14) with cable (6)
and secure both plugs with screws (7).
• Connect the cryo specimen arm with cable (8) to the cryochamber
(15) and secure both plugs with screws (7).
• Place the Dewar vessel (10) onto the roller base (11).
• Hang up the supporting device (12) for the LN
2
pump (13), either in the
arched handle of the Dewar vessel or on the wall, using the supplied
dowels and screws.
• Place the LN
2
pump onto the supporting device and connect the
pump cable (9) to the control unit; secure the plug with screws (7).
4.5.4 Grounding the Dewar
The Dewar must be externally grounded!
For safety reasons, metallic surfaces which contain electronic components have to be grounded. In
the absence of appropriate grounding, housing parts can be above the earth potential and thus dan-
gerous when touched.
4. Startup