National 409TBL Binocular Stereo Instructions Manual page 4

9. STAGE CLIPS: Two locked-on clips hold specimen slide inplace on stage plate.
10. STAGE PLATES: Frosted stage is generally used for viewing transparent specimen and the black and white
stage plate for viewing opaque specimens.
11. STAGE PLATE LOCKING SET SCREW: Locks 80mm stage plate into recesses of microscope base.
12. HEAD: Viewing head with 45 degree inclined eyepieces.
13. FOCUSING KNOBS: Coarse focusing knobs located on each side of arm moves head up or down to bring
specimen into focus.
14. TENSION ADJUSTMENT COLLAR: Used to adjust tension of focusing mechanism.
15. SELECTOR SWITCHES: Individual switches allow user to select between incidental (top lighting) or
transmitted (bottom lighting) or both.
ASSEMBLY
1. Eyepieces:
A. Microscope is shipped with eyepieces already installed. Eyepieces will turn freely, but locking set screws
prevent removal.
a) If you need to remove eyepieces for any reason, observe small Phillips head locking screws located
just below top edge of both left and right eyepiece tube. Using a small jewelers type Phillips
screwdriver, loosen set screws just enough to permit removal of eyepieces.
b) Note that locking the eyepieces into place is not necessary for the operation of your microscope, but
will help to secure them against loss.
B. Install rubber eyepiece shields by slipping over top of eyepieces, flared side outward.
OPERATION
1. ILLUMINATION
A. Before operating microscope, make certain that the main voltage of your microscope corresponds
to the voltage of your power outlet, either 120v or 220v. Insert microscope plug into matching
voltage outlet.
B. The microscope is furnished with two stage plates. The frosted glass plate is used when viewing
transparent specimen slides or for viewing some specimen thin enough through which light can pass
(insect wings, etc.) The plastic black/white contrast plate can be used when viewing opaque objects or
for dissecting. Choose side of plate providing best contrast with specimen.
C. There are three rocker type light controls located on top surface of microscope base.
MAIN
"I"
"T"
NOTE: Use transmitted illumination only with frosted glass stage plate in place. HEAT GENERATED IN
BASE FROM BOTTOM LIGHT WILL WARP OR DAMAGE THE PLASTIC BLACK/WHITE PLATE.
SUCH DAMAGE WILL NOT BE COVERED BY WARRANTY.
Remove frosted stage plate by loosening locking set screw located on front of base with supplied "L"
wrench. Insert daylight blue filter into machined groove provided in center of base. Install frosted glass
stage plate with smooth side facing up. Tighten locking set screw.
= Turns power on and off
= Turns incidental light on (top illumination)
= Turns transmitted light on (substage illumination)
4