Operation - National 215-RLED Instructions Manual

ASSEMBLY
1. Eyepieces:
Remove the dust caps from eyepiece tubes and insert eyepieces.
2. Specimen holder:
Rotate coarse focusing knob to move stage platform to its lowest position. Remove two knurled screws from
mechanical stage platform. Place specimen holder on stage and using the two knurled locking screws, attach
specimen holder to mechanical stage

OPERATION

1. Place microscope directly in front of you in a manner which permits you to comfortably look into the eyepiece. Note
that the head of microscope rotates 360º, permitting you to operate the microscope from the front or from the back,
whichever is most convenient for you. It also permits convenient sharing of microscope by more than one user, by
simply rotating head, without needing to move entire microscope.
2. Assure that light is available for illuminating the specimen.
a. Your microscope has special LED illumination that is powered by 3 rechargeable AA nickel metal hydride batteries
(supplied). These batteries may be recharged, as required, using the recharger (supplied). Each set of batteries
may be recharged approximately 500 times before replacing, and each charge will provide up to 50 hours of
microscope operation. The LED component (bulb) will last for up to 50,000 hours before replacement is required.
DO NOT USE regular AA alkaline batteries. Use of other than rechargeable AA nickel metal hydride
batteries could result in batteries exploding during recharge. ONLY USE THE SUPPLIED SWITCHING
BATTERY RECHARGER WITH AUTOMATIC "TRICKLE CHARGE".
b. It is recommended that you charge the batteries before initial use and after prolonged storage as the batteries may
have discharged. Plug output cord from battery charger into DC recharging socket located on back of microscope
base. Your automatic switching recharger operates on 100 to 240 volts AC 50/60 Hz. Plug recharger into your AC
wall outlet. Battery recharger is also equipped with an automatic "trickle charge" feature, the red LED indicator
lamp located on recharger will be illuminated when batteries are receiving maximum charge. After batteries are
charged, the red LED indicator lamp will turn to green and charger automatically switches to "trickle charge". The
charger can be left plugged in, but for safety reasons it is a good idea to disconnect the charger from the AC wall
outlet and the output cord from recharging socket after 12 hours. Batteries and charger may feel warm when
charging, and unplugging the recharger is a safety precaution.
Note that your microscope can be used during recharging. Simply turn "on/off" switch on back of microscope
base to "on" position and proceed as follows.
3. Interpupillary adjustment of head: Look through the eyepieces and move the eyepiece holder tubes by rotating them
on their axis. When a full field of view is observed through both tubes, and images blend into one, interpupillary
distance is corrected for your eyes. Check the interpupillary scale and note index reading for future reference, in case
other users will be changing this adjustment from time to time. Each person may have to adjust interpupillary distance
to receive the same image.
4. Rotate coarse focus knobs to move stage down (away) from objective lens as far as possible.
5. Position the objective turret until the 4x (smallest) objective lens "clicks" into position in the optical path. Note that
each time you change from one objective lens to another you should turn the turret until you hear the "click", which
indicates that the lens is properly indexed in the optical path.
6. Swing moveable finger on slide holder outward. Place specimen slide (cover slip up) on top of stage surface against
fixed side of slide holder. Slowly release moveable finger until it makes contact with specimen slide.
7. Turn rheostat (dimmer) control in direction to reduce illumination brightness to about mid-point. Normally, brightness
will need to be reduced as magnification is reduced, and increased as magnification is increased. Experiment with this
adjustment until optimum resolution and contrast of specimen is obtained.
WARNING
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