VWR avantor VISISCOPE IT417 PH Manual De Instrucciones página 21

4. Use the CT to focus the condenser phase ring (bright) ①
and the objective phase ring (dark) ② image. If the bright
phase ring's image is not sharp, adjust the CT head until
you can see a clear image of the phase ring. (Fig. 27)
5. Adjust the bolts of the two centering holes in the phase
contrast slider using the provided Allen wrenches ③ until
the bright ring and the dark ring match. (Fig. 28)
6. The 4x and the 10X phase contrast objectives use the same
ring on the phase contrast slider. The coincidence of the
phase ring center and the phase contrast center must be
verified with both objectives. (Fig. 29)
• If the phase ring is incorrectly centered, the contrast will
be severely impaired.
• The phase ring may need recentering during and after
observation of very thick specimens.
• The phase ring may show an apparent misalignment if
the specimen is not flat.
vwr.com I Instruction manual INVERTED MICROSCOPE, VISISCOPE
①
②
IT417 PH
®
③
F ig. 27 F ig. 27
F ig. 28 F ig. 28
F ig. 29 F ig. 29
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