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Operation - National DS-2 Instructions Manual

Compound biological microscope with digital camera

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11. STAGE PLATE: Reversible black and white 60mm stage plate.
12. STAGE CLIPS: Two locked-on clips hold specimen slide in place on stage
13. POWER SWITCH: Turns power to incidental illuminator on and off.
14. RECHARGER: Automatic switching charger accepts 100v-240v, 50H/60H input and supplies 12VDC power to
the microscope for recharging batteries.
USB CABLE: USB 2.0 cable with connector.
15.

OPERATION

1. Place microscope directly in front of you in a manner, which permits you to comfortably look into the eyepiece.
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.
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.
2. Place specimen to be viewed on stage, centered under objective lens. If viewing a prepared slide, make certain
slide is positioned so side with cover slip is facing up.
3. Push On/Off switch to on position.
4. Position the top incidental top LED illuminator so that it will illuminate your specimen evenly.
5. Position focusing knobs in the center of focusing range.
6. Viewing head is mounted on a post. The height of viewing head can be adjusted up or down on the post in
order to focus on different sized objects. While firmly holding viewing head with one hand, loosen locking knob
located on back of focusing assembly so that head can move freely up or down on post.
7. While looking through microscope, move viewing head up or down on post until object can be seen in
approximate focus. Tighten focusing assembly locking knob. It is not necessary to make this adjustment every
time you change objects to be viewed, so long as the different objects are of similar thickness or height. The
distance between specimen and objective lens will be about 85mm when microscope is in focus. This is called
the "working distance".
8. The "depth of field" of a microscope is very small, or narrow. When focused sharply on one feature of a
specimen, any feature slightly below or above will appear slightly out of focus. This is normal. For example,
WARNING
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