KERN Optics OBD 127, Инструкция пользователя

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21 OBD-1-BA-e-1510
7
Changing the fuse
The fuse housing is on the rear of the microscope below the mains power supply
socket. With the device switched off and unplugged, you can pull out the housing.
When doing this, it is helpful to use a screwdriver or similar tool. The defective fuse
can be removed from its housing and be replaced with a new one.
After that, you just need to insert the fuse housing back into the insertion point below
the mains power supply socket.
8
Using optional accessories
8.1 Polarisation unit
The polarisation unit consists of a polariser and an analyser.
Both consist of a round glass plate with an external holder ring. To mount the
analyser you have to remove the microscope head at first. Then the analyser has to
be inserted into the round aperture of the beam path right above the nose piece.
The polariser on the other hand is only placed on the ring holder of the field lens
(see
right illustration) .
There are two points to take into account when subsequently using the polarisation
unit:

The aperture setting of the condenser must be in position PH .

For its starting position, the polariser must be turned to the position in which
you can see the highest level of darkness in the field of view (without object
slide).