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User Manual for National 447TBL-20 2x 4x Stereo Microscope Click to enlarge the picture
Contents of the user manual for the National 447TBL-20 2x 4x Stereo Microscope
- Product category: Microscopes National
- Brand: National
- Description and content of package
- Technical information and basic settings
- Frequently asked questions – FAQ
- Troubleshooting (does not switch on, does not respond, error message, what do I do if...)
- Authorized service for National Microscopes
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User manual for the National 447TBL-20 2x 4x Stereo Microscope contain basic instructions
that need to be followed during installation and operation.
Before starting your appliance, the user manual should be read through carefully.
Follow all the safety instructions and warnings, and be guided by the given recommendations.
User manual is an integral part of any National product,
and if it is sold or transferred, they should be handed over jointly with the product.
Following the instructions for use is an essential prerequisite for protecting
health and property during use, as well as recognition of liability on the part of the manufacturer
for possible defects should you make a warranty claim. Download an official National user manual in which you will find instructions on how to install, use, maintain and service your product.
And do not forget – unsuitable use of a National product will considerably shorten its lifespan!
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Product description The 447TBL-20 2x/4x Stereo Microscope from National Optical is a dual magnification stereoscopic microscope fit for laboratories, high school and university students. The stereo (two) eyepiece configuration is preferred by most researchers and students because of the superior depth of field and comfort compared to monocular microscopes. This model of the 447 stereo microscope has a paired 20x eyepiece delivering 40x and 80x magnification. Two achromatic paired objectives are parcentered and parfocalled to keep the specimen centered and focused when switching between the two magnification settings. The stage can be illuminated from above and/or below using 10W tungsten lights activated by separate base-mounted On/Off switches. The top (incidental) light source has an adjustable beam to help optimize the brightness and contrast of the specimen.A user-friendly design complements the range of features that make the 447 stereo microscope a welcome addition to labs as well as classrooms. The heavy-duty post-mounted adjustable viewing head permits use of specimen heights up to 35mm / 1.4", and is also capable of 360° rotation to help share the eyepiece among colleagues and students without moving the microscope. The rack and pinion system has a single focus dial and includes a slip clutch mechanism to prevent mishandling. An adjustable interpupillary distance, left-side diopter correction, and reticle holder/retainer provide the 447 series with the flexibility needed to create a customized viewing experience. - Optical System
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- Paired 20x inclined eyepiece
- 2x and 4x achromatic objectives
- 40x and 80x magnification
- Parfocalled, parcentered, paired objectives
- 75mm / 3" working distance, 35mm / 1.4" maximum specimen height
- Eyepiece with diopter adjustment and reticle holder/retainer
- 55-75mm / 2.2-3" interpupillary distance
- Focusing
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- Rack and pinion focus system
- Slip clutch prevents over-turning
- Tension adjustment prevents focus drift
- Lighting
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- Incidental (top) 10 watt tungsten illumination with adjustable beam
- Transmitted (bottom) 10 watt tungsten illumination
- Dual base-mounted On/Off switches
- Construction Details
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- 80mm frosted glass and 80mm reversible black and white stage plates
- Locked on metal stage clips
- 360° rotating viewing head
- Cast metal frame
- Grey enamel finish
- 14.6" (37 cm) maximum height
- 5.5 lb (2.5 kg) weight
In the Box National 447TBL-20 2x/4x Stereo Microscope Eyeshields Dustcover Limited Lifetime Warranty (Excluding Bulb) Table of Contents
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Technical parametersNational 447TBL-20 Specs | Microscope Type | Stereo | | Eyepiece | 20.0x | | Objective(s) | 2.0x / 4.0x | | Head | Inclined | | Light Source | 12 V, 10 W tungsten (incidental/transmitted) | | Light Control | 4-position On/Off | | Stage | 80 mm frosted glass and reversible black/white contrast plate | | Interpupillary Adjustment | 2.2 - 3" (55 - 75 mm) | | Maximum Specimen Height | 1.4" (35 mm) | | Maximum Height | 14.6" (37 cm) | | Weight | 5.5 lb (2.5 kg) | | | | Package Weight | 9.25 lb | | Box Dimensions (LxWxH) | 16.4 x 16.2 x 10.9" |
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