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7
Dry Darkfield Condenser Installation & Operation
Instruction
1) Mounting the dry darkfield condenser
Rotate the nosepiece and set the 4x
objective in position.
Loosen and raise the focusing rack stop
screw to the highest position.
Turn the coarse focus knob to raise the
mechanical stage to the highest position
without contacting the 4X objective.
Turn the condenser control knob to raise the condenser to the highest position.
Loosen the condenser lock thumb screw, pull down the condenser and take it
off, insert the dry darkfield condenser in, and tighten the condenser lock thumb
screw (See
Fig. 8
).
Re-adjust the condenser height to its normal position.
Re-adjust the mechanical stage height to its normal position.
Lower the focusing rack stop screw back and use the bolt to lock it when
needed.
Note:
When raising the mechanical stage, do not make contact with the objective.
2) Centering the dry darkfield condenser
Turn the 4X objective to the light path.
Turn the condenser focus knob to lower the
condenser till a dark spot showed in the
viewing field as shown in
Fig. 9
(a)
.
Turn the condenser translational centering
screws to move the dark spot to the center
as shown
in
Fig. 9
(b)
.
3) Place the slide on the stage.
4) Raise the condenser all the way to the top and then lower it a little bit.
5) Follow the procedures in this manual to bring the sample on slide in focus and
observe.
6) Move the condenser up or down slightly to get the best darkfield viewing.
Note
：
The dry darkfield condenser is used with the dry objectives only.
The dry darkfield condenser works with the 4X, 10X, 40X objectives.
The dry darkfield condenser does not work with the 100X oil immersion objective.
(a)
(b)
Fig. 9
Condenser Lock
Thumb Screw
Centering Screws
Condenser Holder
Fig.8
