KERN OBL 145, User Instructions

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11 OBL-14-15-BA-e-1610
4.5 PH con PH slide
The condenser is firmly fixed onto a holding ring (condenser holder) underneath the
microscope stage. There is the ability to adjust the height of the condenser, but not to
centre it.
We recommend that you use the coarse adjustment knob to bring the specimen
stage to its uppermost position when you need to remove the condenser. Then use
the focus dial of the condenser to move the condenser holder to a low position. In
this way the condenser can be taken off after loosening the screw on the left side
holding ring. You should avoid touching the optical lenses with bare fingers.
To attach a PH slide for phase contrast applications, it just has to be inserted into the
appropriate point on the front side of the condenser.
For further information on this please see 5.9 Phase contrast unit.
5
Operation
5.1 Getting started
The very first step is to establish a power connection using the mains plug. You
should first adjust the
dimmer to a low level , so that when you look through the
eyepiece for the first time, your eyes are not immediately subject to a high level of
light. You can now switch on the
lighting using the main switch .
The next step is to place an object holder with the sample on the angle table. To do
this, the cover glass must be facing upwards. You can fix the object holder to the
table using the slide holder
(see illustration on the left) . To move the sample into the
beam path, you must use the adjustment wheels on the right of the angle table (see
illustration on the right) .
You can position a total of two object holders at the same time.