Why does the light fail to operate on my National Microscope?
The light on your National Microscope might not be working due to several reasons: the batteries may be fully discharged (recharge them), the rheostat control might not be turned up enough (increase the light intensity by turning the rheostat), the light switch could be off (turn it on), the LED bulb might be burned out (replace it), or the fuse might be blown (replace the fuse).
What to do if the image is not sharp on National 211 Microscope?
If the image on your National Microscope lacks sharpness, it could be due to dirty objective lenses (clean them), dirty eyepiece lenses (clean them), or too much light (adjust the diaphragm).
Why image will not focus on National 211?
If the image on your National Microscope won't focus, the rack stop might not be set correctly (adjust the rack stop), the slide could be upside down (place the slide on the stage with the cover slip up), or the slide cover slip might be too thick (use a 0.17mm thick cover slip, No.1 cover slip).
How to fix spots in field of view National 211?
If you notice spots in the field of view of your National Microscope, it might be due to a dirty eyepiece or condenser lens (clean the lens) or a dirty specimen slide (clean the slide).
What to do if image does not remain in focus on National 211?
If the image on your National Microscope doesn't stay in focus, it could be because the stage is dropping due to its own weight. To resolve this, adjust the tension control.
Details components included with Model 211/211-RLED microscope.
Details components included with Model 212/212-RLED microscope.
Lens closest to the eye, magnifies primary image.
Revolving turret holding objective lenses for magnification changes.
Lens closest to object, forms first magnified image.
Permits precise, mechanical manipulation of specimen slide.
Platform where specimen slide is placed.
Condenses light rays for improved image resolution.
Controls aperture to achieve optimum resolution.
Attached to iris diaphragm, holds neutral filter.
Controls maximum upward stage travel, prevents damage.
Coarse and fine knobs for focusing specimen image.
Built-in LED illuminator for specimen lighting.
Instructions for attaching the specimen holder.
How to operate the lighting for corded models.
How to operate lighting for rechargeable models.
General| Objective | 4x, 10x, 40x |
|---|---|
| Eyepiece | 10x widefield |
| Illumination | LED |
| Focusing System | Coaxial coarse and fine focus |
| Stage | stage clips |
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