DISSECTING SCOPE CARE AND USE

David B. Fankhauser, PhD

6 April 1987, rvsd 23 March 1994, 27 Dec 1994, 3 Jan 1994, 26 Mar '97, 5 Jan '98



PICKING IT UP:

Carefully pick up your numbered scope by grasping the arm and supporting the base with the other hand held flat, carry to your desk. (Do NOT push fingers up underneath base, you may push out the stage plate.) Make a second trip to pick up a light with transformer. Note where they should be returned, and the way that the cords are wrapped on the light and transformer. Set up scope as follows, and then illustrate:



1) transilluminator

2) mirror positioning knob

3) base

4) stage plate

5) stage clips

6) arm

7) focusing knob

8) optical head

9) zoom knob

10) right ocular

11) adjustable left ocular

12) interocular distance

13) transformer

14) extension arm

15) light housing

16) voltage selector



SETTING IT UP:

1. Remove the dust cover, raise optical head by rotating focusing knob until back of optical head is just above top of arm.

2. Unwrap cord from around light housing, and, for top lighting, insert light into hole in back of head (or for bottom illumination, into base if equipped with transilluminator.)

3. Unwrap cord from around transformer, set voltage selector to off, plug into electrical outlet.

4. Plug cord from light into back of transformer, turn voltage selector on to the #1 setting. Did the light go on? If not, report to your professor.

5. Place specimen in center of field, turn zoom knob on top of optical head to 1.0. (This will give an effective magnification of 10x since the oculars are 10x.)

6. Looking only through the right ocular with right eye, focus on specimen with the focusing knob. When finely focused, look only through the left ocular with the left eye, and focus by rotating the adjustable left ocular. The specimen should now be in focus for both eyes.

7. Adjust for your own interocular distance by spreading apart or squeezing together the oculars so that a single three-dimensional image is seen, with no black areas.

8. Adjust the magnification by rotating the zoom knob so that desired detail is clear on the specimen. You may elect to use either the black or white side of the face plate for optimum visibility. Adjust the amount of light on the specimen by adjusting the setting on the transformer. To prolong the life of the bulb, use the lowest transformer setting which yields satisfactory illumination. Use lens paper only for cleaning lenses.

9. Make appropriate drawings, titled (at top), magnification of view (lower R), name and preparation of specimen (below), and all appropriate features labeled.



PUTTING IT AWAY:

1. Turn off the light, unplug transformer from outlet. Unplug light from transformer. Carefully wrap cord snugly around the transformer, tuck in end so that it stays put.

2. Remove light from scope, wrap cord around light body, tuck in. Push into larger side of ring on transformer extension arm, replace in cabinet in the correctly numbered location.

3. Lower optical head of scope until it almost touches base, replace dust cover, return to the correctly numbered location in the cabinet.