KERN OBL 145, User Instructions

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OBL-14-15-BA-e-1610 10
4
Assembly
4.1 Microscope head
Inside the packaging the microscope head is already mounted but inclined towards
the rear. In order to turn it to the front you must loosen the fixing screw on the tube
connection point and after the turning fix it again with the screw. In case of removing
the head completely from the housing, you should always make sure that you do not
touch the lenses with your bare fingers and that no dust enters the apertures.
4.2 Objectives
The standard equipment of the series OBL-14 and OBL-15 includes two Infintiy E-
Plan objectives (4x / 100x) and two Infinity Plan objectives for phase contrast
applications (10x / 40x). All four objectives are already mounted to the nosepiece.
After removing the protective foil they are ready for use. They are ranged in such a
way that if you turn the nosepiece clockwise, the objective with the next higher
magnification appears. When the objectives need to be dismounted, you should
always make sure that you do not touch the lenses with your bare fingers and that no
dust enters the apertures.
For objectives which are marked “OIL”, you must use an immersion oil with the
lowest level of inherent fluorescence.
4.3 Eyepieces
You must always use eyepieces with the same magnification for both eyes. These
are simply placed onto the tube connectors, once you have first removed the plastic
protective caps. There is no way of fixing them. You should always make sure that
you do not touch the lenses with your bare fingers and that no dust enters the
apertures.
4.4 Colour filter
A blue colour filter is already an integral part of the microscopes of the series OBL-14
and OBL-15. It is fitted underneath the field diaphragm. In order to use suitable filters,
these can simply be placed in the ring bracket of the field lens.