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BestScope BS-2070 Instruction Manual
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BestScope BS-2070 Instruction Manual

Biological microscope
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Biological Microscope
BS-2070
Instruction Manual
This instruction manual is for lab biological microscope BS-2070 series. To insure safety and
obtain optimum performance and familiarize yourself fully with the use of this microscope .We
recommend that you read the manual thoroughly before operating the microscope ,Attain this manual
instruction in an easily accessible place near the microscope for the further reference.

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Summary of Contents for BestScope BS-2070

  • Page 1 BS-2070 Instruction Manual This instruction manual is for lab biological microscope BS-2070 series. To insure safety and obtain optimum performance and familiarize yourself fully with the use of this microscope .We recommend that you read the manual thoroughly before operating the microscope ,Attain this manual...

  • Page 2: Safety Notice

    BestScope International Limited Safety notice 1. Transportation As microscope is a precision instrument, handle with care, avoiding impact or abrupt movement during transportation. Do not push or pull the microscope during using, otherwise the precision for image will be reduced.
  • Page 3 BestScope International Limited Input voltage in the label: 220～240V 50/60Hz Working voltage could be AC 110V, 120V, 220V, 230V or 240V 7. The bulb, fuse and electronic cord have been assembled already in the factory and please make sure to use the spare parts of them supplied by the manufacturers.
  • Page 4 BestScope International Limited Installation and Operation 1. Structure and nomenclature Eyepiece 10X, Binocular head diopter adjustable Eyepiece fixture Eye tubes fixture screw Microscope body Nosepiece Objectives Power supply Specimen holder Mechanical stage Lightness adjusting knob switch screw Condenser with Fine focusing knob...
  • Page 5 BestScope International Limited 2. Technical parameter and specification 1. Specification 1.1 Optical system: infinity optical system 1.2 Illumination: inserted transmitted illumination, 12V20W/30W halogen bulb (standard outfit) or LED (available) Input voltage: 220V～240V 50/60Hz Voltage undulation: ±10% Electric current: 0.4A Fuse: 250V 1A delayed model, 5×20 mini type fuse 2pcs 1.3 Focusing adjustment: Division of fine focusing adjustment: 0.002mm...
  • Page 6 BestScope International Limited Resolution = λ / ( 2 × N.A.) λ stands for wavelength ( λ = 0.55μmm) ﹡Eyepiece view field The max diameter measured when the diaphragm is open. 10X/20 means the magnification is 10X and the max diameter of view field is 20mm ﹡Effective view field...
  • Page 7 BestScope International Limited 4. Assemblage Please read the safety notice carefully before assembly and make the assembly according to the following steps. Tools: wrench (2 pcs) 4.1 There is correct input voltage in the label on microscope. Make sure the voltage in your position is right. Improper input voltage may cause short circuit and fire.
  • Page 8 BestScope International Limited 4.5 Adjustment and replacement 4.5.1 Condenser The condenser is mounted in the microscope before shipment. Remove or replace the condenser according to the following steps 4.5.1.1 Turn the lifting knob for condenser and make the bracket in a suitable position 4.5.1.2 Loosen the screw in the left side of condenser...
  • Page 9 BestScope International Limited 4.6.1.1 Turn off the power supply (turn the switch to “O”) and pull out the connector 4.6.1.2 Wait for 30 minutes till the bulb is cooling 4.6.1.3 Handle the grooves in condenser and pull it out 4.6.1.4 Pull out the original bulb 4.6.1.5 Replace the bulb by gloves or cloth material then...
  • Page 10 BestScope International Limited ﹡Never turn the left and right focusing knob in the adverse direction at the same time. Never turn the coarse focusing knob when the stage is in the end of removing range. Otherwise it will make damage to the instrument ﹡...
  • Page 11 BestScope International Limited 5.8.1 Adjust the aperture diaphragm by the adjusting shaft. The brightness and resolution will be decrease while the contrast and depth of view will increase if the diameter of aperture diaphragm reduces 5.8.2. Adjust the value of aperture diaphragm to 70%～80% of the value of objective’s N.A.
  • Page 12 BestScope International Limited diaphragm and aperture diaphragm entirely then observe the exit pupil which is light and in nummular shape 5.9.2.3 Remove the air bubble as following Turn the nosepiece slowly and turn the oil immersion objective once or twice...

  • Page 13: Troubleshooting

    BestScope International Limited Connect the photo adapter with the Canon 650 digital camera. Then insert it into the photo tube. Adjust it till get sharp image then tighten the fixing screw. The operation is same as the above of CMOS/CCD camera.
  • Page 14 BestScope International Limited Floating specimen Fasten securely Insufficient illumination brightness Specimen rise from stage surface Place it stable Revolving nosepiece not in click stop Revolve to click-stop position position Image tinged yellow Blue filter not used Use blue filter Insufficient illumination brightness...
  • Page 15 BestScope International Limited More persistent dirt, such as fingerprints, grease and oil, may be removed with soft cotton, lens tissue, or gauze lightly moistened with absolute alcohol (ethyl or methyl alcohol). To clean immersion oil off the oil-immersion type objective, use lens tissue, soft cotton or gauze lighty moistened with petroleum benzine only.