Nikon Eclipse E400 POL Petunjuk Manual - Halaman 17

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3. Operation of Each Part

Clamp the coarse

focus stopper

Purpose of the coarse focus stopper

The coarse focus stopper marks the stage position at which the specimen is in focus by

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restricting the movement of the coarse focus knob. (Movement of the stage by the fine focus

knob is not restricted.)

Once the coarse focus stopper has been clamped in position. the coarse focus knob cannot be

used to move the stage any higher. In effect, once the coarse focus knob has been clamped in

place at the focus position, a rough focus can be attained the next time simply by turning the

coarse focus knob as far as it will go. This feature is convenient when viewing similar

specimens one after another.

Using

the coarse focus stopper

With the specimen in focus, turn the coarse focus stopper ring as far as it will go in the dire

of the arrow on the base of the microscope (about 3/4 revolution). The coarse focus stopper is

now clamped in position.

When changing the specimen, lower the stage by turning only the coarse focus knob.

After changing the specimen, gently raise the stage by turning only the coarse focus knob as far

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as it will go.

The specimen should be roughly in focus when the stage has been raised as far as it will go: use

the fine focus knob to bring the specimen into perfect focus.

If the coarse focus stopper is not being used, be sure to turn the coarse focus stopper ring in the

rrow on the microscope base as far as it will go.

direction opposite to the